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technical manual TM-T88 Series EPSON English 4006800
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Seiko Epson Corporation. No patent liability is assumed with respect to the use of the information contained herein. While every precaution has been taken in the preparation of this book, Seiko Epson Corporation assumes no responsibility for errors or omissions.
EPSON SEIKO EPSON CORPORATION Printed in Japan E9609140-0000SE
TM-T88 Series Technical Manual FCC CLASS A FCC Compliance Statement For American Users This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Introduction The TM-T88 (RS-232 serial interface specification)1 and the T88P (parallel interface specification) are line printers that can print on a paper roll. The printer has the following features: Printing ❏ High speed printing approximately 16.5 lines/second (1/6 inch feed). ❏ Low-noise thermal printing. ❏ High reliability due to a stable mechanism. Application Software ❏ Command protocol is based on the ESC/POS™ standard. ❏ Various layouts are possible by using page mode.
Warnings, Cautions and Notes WARNING: Warnings must be followed carefully to avoid bodily injury. CAUTION: Cautions must be observed to avoid damage to your equipment. Note: Notes have important information and useful tips on the operation of your printer. Rev.
Revision Sheet Revision Page Altered Item and Contents Rev. A iv Rev.
Contents Chapter 1 Features and General Specifications Printer Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Printing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Character Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2 Mechanisms and Operation Component Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 5 Disassembly, Assembly, and Adjustment Before starting disassembly, assembly, and adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
viii Rev.
TM-T88 Series Technical Manual Chapter 1 Features and General Specifications Printer Parts Printer cover Control panel POWER PO WE ER R RO R P OU APE R T FE ED ERROR PAPER OUT FEED Cutter cover Cover open button Figure 1-1 TM-T88 appearance Rev.
Printing Specifications Printing method: Thermal line printing Dot density: 180 dpi × 180 dpi. The number of dots per 25.4 mm (1") Printing direction: Unidirectional with friction feed Printing width: 72 mm (2.83"), 512 dot positions Characters per line: 42 (font A) 56 (font B) 0.28 mm (.01") (2 dots) (font A) Character spacing: 0.28 mm (.01") (2 dots) (font B) Programmable by control command. Printing speed: High speed: Approximately 16.
TM-T88 Series Technical Manual Paper feed speed: Approximately 2.76 inches/second (approximately 70 mm/second) (continuous printing) Line spacing: 1/6 inch (4.
Paper Roll Supply Device Supply method: Drop-in paper roll Near-end sensor Detection method: Microswitch Paper roll spool diameter: Inside: 12 mm (.47") Outside: 18 mm (.71") Near-end adjustment: Adjusting screw Remaining amount: Fixed position #1 (approximately 23 mm (0.9”)) #2 (approximately 27 mm (1.06”) (The adjusting screw has two positions.) Note: You can use a command to stop printing upon detection of a paper near-end.
TM-T88 Series Technical Manual Paper roll size: Roll diameter: Maximum 83 mm Take-up paper roll width: 80 + 0.5/-1.0 mm (3.15" + 0.02"/-0.04") Inside: 12 mm (.47") Paper roll spool diameter: Outside: 18 mm (.71") CAUTION Paper must not be pasted to the paper roll spool. Printable Area The printable area of a paper with width of 79.5 ± 0.5 mm (3.13" ± 0.02") is 72.2 ± 0.2 mm (2.84" ± 0.008") (512 dots) and the space on the right and left sides are approximately 3.7 mm (0.146").
Printing and Cutting Positions Emergency-cutter Manual-cutterposition position Approx. 26 26.3 Approx.14.8 15 Auto-cutter blade position Paper feed direction Center of the print dotline [ Units: mm (All the numeric values are typical.) ] Figure 1-4 Printing and cutting positions Note: Numeric values used here are typical values; the values may vary slightly as a result of paper slack or variations in the paper. Internal Buffer Receive buffer selectable as 45 or 4K bytes using the DIP switch.
TM-T88 Series Technical Manual EMI and Safety Standards Applied (EMC is tested using the EPSON PS-170 power supply) Europe: North America: Japan: CE marking: EN55022 EN50082-1 EN45501 Safety Standard: TÜV (EN60950) EMI: FCC Class A Safety standards: UL1950-2TH-D3 C-UL EMI: VCCI Class 1 Conditions of acceptability 1.
Acoustic noise: Operating: Approximately 55 dB (Bystander position) External Dimensions and Weight Height: Approximately 148 mm (5.83") Width: Approximately 145 mm (5.71") Depth: Approximately 195 mm (7.68") Weight: Approximately1.8 kg (3.
TM-T88 Series Technical Manual Major Component Specifications M-T88 Printer Mechanism Paper Feed Motor Type: 4-phase, 48-polarity, PM type stepping motor Drive Voltage: 24 V DC ± 10% Winding resistance: 90 Ω ± 7% at 25° C (77° F), per phase Print Head Unit Dot number: 512 dots Dot density: 0.141 mm/dot (180 DPI) Resistance: Average 865 Ω ± 4.
Power Supply Connector This connector is used to connect the printer to an external power source. Printer Side: Hosiden TCS7960-532010 or equivalent User side: Hosiden TCP8927-631100 or equivalent Hosiden TCP8927-531100 or equivalent Pin number Signal name 1 +24 VDC 2 GND 3 NC Shell Frame GND 2 3 1 Shell Figure 1-8 Power supply connector Note: Be sure to connect the ground wire to the printer using the FG screw on the bottom of the printer.
TM-T88 Series Technical Manual CAUTION Pin 4 must be used only for the drawer. 1 6 Figure 1-9 Drawer kick-out connector Drawer kick-out drive signal Output signal: Output voltage: Approximately 24 V Output current: 1A or less CAUTION: To avoid an overcurrent, the resistance of the drawer kick-out solenoid must be 24 Ω or more. Output waveform: Outputs the waveforms in Figure 1-9 to the points A and B in Figure 1-10. t1 (ON time) and t2 (OFF time) are specified by ESC p.
Drawer open/close signal Input signal level (connector pin 3): "L" = 0 to 0.8 V "H" = 2 to 5 V Drawer kick-out connector 1 F. G With shielded Drawer kick-out solenoid 2 A 3 P-GND +24V 4 5 B Drawer open/close switch 6 P-GND Printer side User side (Drawer kick-out side) Figure 1-11 Drawer circuitry CAUTIONS: Use a shielded cable for the drawer connector cable. Two driver transistors cannot be energized simultaneously. The drawer drive duty must be as shown below.
TM-T88 Series Technical Manual RS-232 serial interface Specifications Data transmission: Serial Synchronization: Asynchronous Handshaking: DTR/DSR or XON/XOFF control Signal levels: MARK = –3 to –15 V: Logic "1"/OFF SPACE = +3 to +15 V: Logic "0"/ON Baud rate: 2400, 4800, 9600, 19200 bps Data word length: 7 or 8 bits Parity: None, even, odd Stop bits: 1 or more Connector (printer side): Female DSUB-25 pin connector Notes: The handshaking, data word length, baud rate, and parity depend on
Interface connector terminal assignments and signal functions are described in the table below. TM-T88 series printer status and signals (continued) Pin number Signal name Signal direction Function 1 FG — Frame ground 2 TXD Output Transmit data 3 RXD Input Receive data 4 RTS Output Same as DTR signal (Pin 20) 6 DSR Input This signal indicates whether the host computer can receive data.
TM-T88 Series Technical Manual TM-T88 series printer status and signals (continued) (continued) Pin number Signal name Signal direction Function 20 DTR Output 1) When DTR/DSR control is selected, this signal indicates whether the printer is busy. SPACE indicates that the printer is ready to receive data, and MARK indicates that the printer is busy. The busy condition can be changed by using DIP SW 2-1 as follows: DIP SW 2-1 status Off-line Printer ON OFF 1.
XON/XOFF transmit timing DIP SW 1-3 status Printer status XON transmission XOFF Transmission ON OFF 1) When the printer goes on-line after turning on the power (or reset using interface) Transmit Transmit 2) When the receive buffer is released from the buffer full state Transmit Transmit 3) When the printer switches from off-line to on-line — Transmit 4) When the printer recovers from an error using the DLE ENQ 1 or DLE ENQ 2 commands — Transmit 5) When the receive buffer becomes full Trans
TM-T88 Series Technical Manual Notes on setting DIP switch 2-1 to ON ❏ The printer mechanism stops but does not become busy when: an error has occurred, the cover is open, printing stops due to a paper-end, or paper is fed using the paper feed switch. ❏ When setting DIP switch 2-1 to ON to enable handshaking with the printer, be sure to check the printer status using the GS a command and the ASB function. In this setting, the default value of n for GS a is 2.
❏ AC characteristics: Minimum reset pulse width: TRS 1 msec (minimum) ❏ When using pin 6 (DSR) (DIP switch 2-7 is ON): TRS H L Figure 1-12 Minimum reset pulse width (pin 6) ❏ When using pin 25 (INIT) (DIP switch 2-8 is ON): TRS H L Figure 1-13 Minimum reset pulse width (pin 25) Notes: When a signal that does not satisfy the requirements above is input, printer operation is not guaranteed. When a signal is input to pin 25 (INIT) at the TTL level, the requirements above must also be satisfied.
TM-T88 Series Technical Manual Panel Button Feed (FEED) button: Non-locking push button [Function] If you push this button once and release it, the printer feeds paper for one line based on the line spacing set by ESC 2 and ESC 3. If you hold down the button, the printer will feed paper continuously. Paper feeding using the FEED button cannot be performed under the following conditions: 1. The paper roll end sensor detects a paper end 2. When the printer cover is open.
Transmission speed Transmission Speed (BPS) SW 1-7 SW 1-8 2400 ON ON 4800 OFF ON 9600 ON OFF 19200 OFF OFF BPS: Bits Per Second DIP switch 2 SW 2 Function ON OFF 1 Handshaking (BUSY condition) Receive buffer full Off line or receive buffer full 2 Reserved (do not change settings) Fixed to OFF 3 Selects print density Refer to Print Density Selection Table 4 5 Reserved (do not change settings) Fixed to OFF 6 Reserved (do not change settings) Fixed to Off 7 I/F pin 6 reset s
TM-T88 Series Technical Manual For parallel interface model DIP switch 1 DIP Switch Function ON OFF 1 Auto line feed Always enabled Always disabled 2 Receive buffer capacity Data buffer 45 bytes Data buffer 4kB 3-8 Not defined — — DIP Switch Function ON OFF 1 Handshaking (BUSY condition) 2 Reserved (do not change the setting) 3 Selects print density DIP switch 2 • Receive buffer full • Data reading • Off-line • Receive buffer full • Data reading Fixed to OFF Refer to print dens
Panel LEDs Power (POWER) LED: Green Error (ERROR) LED: On: Power is stable. Off: Power is not stable. Red On: Off line (except during paper feeding using the FEED button, self-test printing, and the error state) Off: Normal condition. Blinking: Error Red Paper roll end (PAPER OUT) LED: On: The paper roll near end is detected.
TM-T88 Series Technical Manual Note: A macro can be executed r times (r specifies the number of times to execute the macro) within the specified definition range. The macro can be executed continuously or can be executed by pressing the button. If the macro is executed by pressing the FEED button, the PAPER LED blinks to indicate the macro execution ready state.
Notes: If no characters correspond to the data received, the printer prints ".". Control commands are printed in bold for emphasis. During hexadecimal dumping, any commands other than DLE EOT and DLE ENQ do not function. Insufficient print data to fill the last line can be printed by setting the printer off-line. Ending hexadecimal dumping Hexadecimal dumping ends by turning the power off or resetting the printer via the interface after printing has finished. 1B 21 00 1B 26 02 40 40 .
TM-T88 Series Technical Manual Cover Open Button When the cover open button (located to the right of the cover) is pressed, the printer cover is opened. When the cover is closed, the cover open button is latched. Notes: Be sure to use the cover open button to open the printer cover. Do not open the cover during printing. Do not open the cover during the auto-cutting operation; otherwise the mechanism may be damaged. Cover Open Sensor The cover open sensor monitors the printer cover.
Consumables Specified thermal roll paper: NTP080-80 In Japan: Nakagawa Seisakujo In U.S.A.: Nakagawa Mfg. (USA) Inc. In Europe: Nakagawa Mfg. (Europe) GmbH In Southeast Asia: N.A.K. Mfg. (Malaysia) SDN BHD [Original paper: TF50KS-E Nippon Paper Industries Co., Ltd.] The following paper can be used instead of the specified paper above: Original paper: PD160R New Oji Paper Mfg. Co., Ltd. AF50KS-E Jujo Thermal Oy (Finland) F380 Kanzaki Specialty Papers, Inc. (U.S.A.
TM-T88 Series Technical Manual External Power Supply PS-170 Specifications Input specifications Rated input voltage 90 to 264 V AC Rated frequency 50/60 Hz ± 3 Hz Rated input current less than 100 V A Power switch None Power LED None Output specifications Output voltage 24 VDC ± 5% Rated output current 2.0 A Rated output power Approximately 48 W Output peak current 4.5 A (within 300ms duty 1/6) Rev.
TM-T88 Series Technical Manual Chapter 2 Mechanisms and Operation Component Connection Diagram This printer is made up of the following major components: ❏ M-T88 Printer Mechanism (Switch circuit board assembly-B) ❏ I/F circuit board assembly ❏ Main circuit board unit-A The block diagram for this printer is shown below.
Circuit Block Diagram The control circuitry of this printer is made up of the following major components: ❏ Main circuit board unit-A ❏ Switch circuit board assembly-B ❏ I/F circuit board assembly UB-S01: RS-232 Serial Universal Board UB-P01: IEEE 1284 Parallel Universal Board UB-S02: RS-485 Serial Universal Board The component connection diagram for the electrical circuitry components is shown below.
TM-T88 Series Technical Manual Memory Map The following components are mapped in the memory map of this printer: ❏ CPU ❏ FLASH ROM (program U6, multi-lingual UN10) ❏ PS-RAM (pseudo static RAM) Chip select signal (automatic selection by CPU) 000000H CPU on-chip I/O 00007FH 000080H RAM receive buffer, printer buffer, etc.
M-T88 Printer Mechanism This printer consists of six mechanisms: a paper feed mechanism, a paper supply mechanism, a printer mechanism, a cutter mechanism, a cover mechanism, and a display mechanism. The following illustration shows the external configuration of the M-T88. Figure 2.4.1 M-T88 external configuration Paper Feed Mechanism Paper feed is performed by a power transfer mechanism that rotates the platen, and a head holding mechanism that presses the thermal head against the platen.
TM-T88 Series Technical Manual A separate type gear train is used for this mechanism. When the motor rotates in reverse, the pressure angle relationship causes power to work in the direction that the gear train is separated, so reverse motor operation is impossible. Cover, frame Shaft holder platen Gear, platen 2 Platen Gear, reduction Shaft holder platen Motor, paper, receipt Gear, motor 1 Figure 2.4.
Closing the frame cover causes the top of the heat shield to come into contact with the platen as shown in Figure 2.4.4. The thermal head separates from the stopper in the direction of arrow (3), and the thermal head tip comes into contact with the platen. Radiation plate Platen 3 Cover, frame Head tip Spring, head holding Paper guide Figure 2.4.
TM-T88 Series Technical Manual Head open mechanism The printer uses a drop-in paper roll system, and the thermal head is exposed whenever the frame cover is open (head open mechanism). In addition to simplifying paper loading, this design also makes paper jam clearing and platen cleaning quicker and easier. Thermal head Platen Main frame Paper guide Frame cover Figure 2.4.6 Frame cover open Rev.
The paper outlet of the printer is covered, and even if paper output becomes blocked for some reason, there is enough room in the space between the platen and frame cover for accumulation of two or three normal length receipts (the length of one sheet is assumed to be 80mm or less). This reduces the chance of receipt paper becoming bent and of the print pitch becoming uneven. Paper that accumulates can be easily pulled out of the printer after the paper outlet is opened.
TM-T88 Series Technical Manual Near end sensor mechanism The near end (N.E.) sensor lever is supported by the N.E. sensor holder so it can move. The spring force of the microswitch fixed by a screw to the N.E. sensor holder presses the N.E. sensor lever in the direction of arrow (1) in Figure 2.4.9. The microswitch is linked to the switch circuit board assembly-B by the N.E. sensor lead wire. The N.E. sensor holder is attached to the paper guide by the sensor adjustment screw.
The shield plate provided around the sensor is grounded to the main frame. This printer is designed so that the sensors are exposed when the frame cover is open, but the shield plate acts as a lightning rod to protect sensors against electrostatic damage. The paper sensor board is linked to the switch circuit board assembly-B by the paper sensor lead. Paper guide Photosensor Shield plate Main frame (bottom) Figure 2.4.
TM-T88 Series Technical Manual 3. The heat energy generated by the resistors is transmitted to the roll paper surface through the protective layer to the paper’s heat sensitive layer, causing coloration of the paper. Head tip Radiation plate Spring pin Print circuit board Spring pin Connector Figure 2.4.11 Thermal head configuration Heat sensitive layer Electrode Resistor Board Base Protective layer Figure 2.4.
The width of the energizing pulse is set to the optimum value in accordance with the paper feed speed, the temperature picked up by the thermistor, the head supply voltage, whether or not a dot was printed at the previous position, and the print pattern. uh 0.1ÊF 50V dot512 GND rh W dot217 V U T dot216 S dot1 R Q P bkj k`s rsqQ rsqP udd 0.1ÊF 50V fmc Thermistor T [~X^ sl sl Figure 2.4.
TM-T88 Series Technical Manual Stationary blade mechanism The stationary blade is attached to the frame cover, and the stationary blade holding spring presses the stationary blade against the frame cover. A blade shutter is installed on the frame cover, where it is pulled by the shutter spring. The blade shutter is a safety mechanism that keeps the stationary blade covered whenever the frame cover is open.
The movable blade support, spacer, movable blade, movable blade holding spring, and movable blade spring washer are equipped on the movable blade shaft, which is caulked to the paper cutter frame. The drive pin fits into an oblong hole in the movable blade, and rotation of the drive pin causes the movable blade to rotate left and right on the movable blade shaft. The microswitch is off (open) when the movable blade is in the wait state.
TM-T88 Series Technical Manual When the stationary blade is not in the home position during normal use, the paper cutter motor rotates in reverse to move the stationary blade to the home position. The cutter motor gear has a knob that makes it possible to move the movable blade when the drive force of the motor is unable to return the stationary blade to the home position.
switch circuit board assembly-BSince the printer mechanism, including the auto cutter, will not operate properly if the frame cover is not closed correctly, a cover open sensor mechanism is equipped to detect when the frame cover is not closed correctly. A cover open button mechanism is also provided to partially open the cover. Shaft Frame Switch circuit board assembly-B Cover spring Main frame Cover shaft Figure 2.4.
TM-T88 Series Technical Manual Cover open button mechanism The cover open lever is supported by the main frame shaft. The cover open button along with its return spring is supported by the side of the paper guide. Pressing the cover open button while the frame cover is closed causes part of the cover open button to link with the cover open lever, which rotates the cover open lever. The cover open lever pushes up the shutter blade, which pushes up the frame cover.
In order to simplify maintenance, signal lines such as motors and sensors (except for the thermal head signals) are all connected to the switch circuit board assembly-B by the leads and connectors, and switch circuit board assembly-B is connected by FFC to the main circuit board unit-A. The switch circuit board assembly-B is affixed to the arm coming out of the main frame. The control panel LEDs and push-button are mounted on switch circuit board assembly-B.
TM-T88 Series Technical Manual ❏ Power Supply Circuits Filter circuit +24V output circuit +5V output circuit CPU and CPU Peripheral Logic Circuits CPU The CPU (U4) of this printer has an 8-bit external data bus, a 16-bit internal data bus, and a 19.66MHz external clock. The CPU (U4) controls the printer in accordance with the printer control program written in flash ROM (U6). The following table shows the function of each CPU pin. CPU signal assignments and functions No.
CPU signal assignments and functions (continued) No. Pin name Signal name Function I/O Level 25 CLK CLK Not used. Open O TTL 26 GND GND GND terminal I (0V) 27 X1 X1 Crystal connection I ---- 28 X2 X2 Crystal connection O ---- 29 EA EA GND direct connection I TTL 30 RESET RESET CPU reset input; L: ON I ---- 31 WDTOUT WDTOUT Watchdog timer error detect; L: error O TTL 32 PAO Not used. Open O TTL 33 PA1 Not used. Open O TTL 34 PA2/TO1 Not used.
TM-T88 Series Technical Manual CPU signal assignments and functions (continued) No. Pin name Signal name Function I/O Level 64 65 66 67 68 A23 A22 A21 A20 A19 A23 A22 A21 A20 A19 Address bus. Not used.
ROM (2M or 4M bits) A printer control program and character generator data is written into FLASH ROM (U6). The control program controls basic printer operations, and all CPU (U4) control is performed in accordance with this program. Gate array The gate array (U5) of this printer controls power to the impact head and thermal head. It is equipped with four 8-bit I/O ports, PS-RAM controller, and a +24V control time-limit circuit. The gate array has its own independent 8MHz external clock.
TM-T88 Series Technical Manual Gate array signal assignments and functions (continued) No. Pin name 33 Function I/O Level HEAD1 Not used. Open O TTL 34 HEAD2 Not used. Open 35 HEAD3 Not used. Open 36 HEAD4 Not used. Open 37 HEAD5 Not used. Open 38 HEAD6 Not used. Open 39 HEAD7 Not used. Open 40 VSS VSS GND terminal I (0V) 41 VDD VDD Main power supply terminal (+5) I (+5V) 42 HEAD8 Not used. Open O TTL 43 HEADCOM Not used. Open O TTL 44 P13 Not used.
Gate array signal assignments and functions (continued) No. Pin name 71 Signal name Function I/O Level PE7 Not used. Open I TTL 72 PE6 Not used. Open O TTL 73 PE5 Not used. Open O TTL 74 PE4 Not used. Open O TTL 75 PE3 Not used. Open O TTL 76 PE2 O TTL 77 PE1 O TTL 78 PE0 O TTL 79 VSS GND terminal I (0V) 80 PF7 Not used. Open O TTL 81 PF6 Not used. Open O TTL 82 PF5 Not used. Open O TTL 83 PF4 Not used. Open O TTL 84 PF3 PF3 Not used.
TM-T88 Series Technical Manual Reset from the host interface differs in accordance with interface specifications, as shown below. RS-232C interface specifications Selection between two signals (DSR signal or PIN 25 input signal) is possible. 1284 parallel interface specifications Always use the #25 RESET signal. DIP switch 2-8 is always on. With the 1284 parallel interface, this printer can be reset from the host interface signal’s nInit signal (PIN 31).
Cover open sensor circuit The cover open sensor is located next to the thermal printer mechanism, and it is connected via switch circuit board assembly-B to the main circuit board unit-A. Detector signal R_COVER is input to the CPU (U4). Near end sensor circuit The near end sensor is located next to the thermal printer mechanism and the roll paper holder. It is connected via switch circuit board assembly-B to the main circuit board unit-A. Detector signal RNE is input to the CPU (U4).
TM-T88 Series Technical Manual Power Supply Circuit The table below shows supply voltage values and their applications.
I/F Circuit Board Assembly This printer uses a TM Series universal interface, which allows support of a variety of different interfaces by changing the interface board.
TM-T88 Series Technical Manual Chapter 3 Handling, Maintenance, and Repairs Handling Transport Precautions Take the following steps to protect the unit against vibration and impact whenever transporting it: CAUTIONS: ❏ We recommend that each unit be packed individually in the boxes supplied by EPSON. ❏ Remove the paper from the unit. ❏ Make sure that the roll paper cover is securely closed. Setup Precautions Note: The cover of the unit is secured in place with tape.
❏ The heating element of the printer mechanism’s thermal head and the driver IC are easily damaged. Never allow these components to come into contact with metal or other hard objects. ❏ Never touch the printer mechanism’s (thermal head’s) heating element with your hand. Doing so can soil the heating element and affect proper operation. ❏ The head and motor areas are very hot during and immediately after printing. Do not touch components in these areas directly with your hand.
TM-T88 Series Technical Manual Loading roll paper Note: Be sure to use paper rolls that meet the specifications. Do not use paper rolls that have the paper glued to the core because the printer cannot detect the paper end correctly. 1. Make sure that the printer is not receiving data; otherwise, data may be lost. 2. Open the paper roll cover by pressing the cover-open button. If the cover-open button will not open the cover, see page 3-7. PO WE ER R RO R P OU APE R FE T ED 3.
6. Pull out a small amount of paper, as shown. Then close the cover. 7. Tear off the paper as shown. PO WE ER R RO R P OU APE R T FE ED Remaining roll paper adjustment (adjusting the paper near end sensor) This sensor has two settings, which are the lower and upper positions. This sensor is set to the lower position at the factory. If you find that there is not enough paper remaining on the roll when the near-end sensor is triggered, you can change the setting to the upper position as described below.
TM-T88 Series Technical Manual 2. Loosen the adjustment screw with a coin or flathead screw driver. Knob Detector screw Detector lever PO WE ER R RO R P OU APE R FE T ED Figure 3-2 3. Move the tab up to the upper position. 4. Tighten the adjustment screw, and check to be sure that the detecting lever moves freely. 5. Replace the paper roll. Note: For your reference, this shows the diameter at which the near-end sensor is triggered.
Other hole Knob Detector screw Detector lever Note: To use the printer mounted on a wall, you need the optional Wall Hanging Bracket: Model WH-10. This is a kit that contains roll-paper stoppers, brackets, screws for brackets, a wall mount, an operation panel sheet, and an installation manual. Using the power switch cover WARNING: If an accident occurs when the power switch cover is attached, unplug the power supply cord from the outlet immediately. Continued usage may lead to fire or shock.
TM-T88 Series Technical Manual To remove it, use a flathead screw driver or similar tool. You can turn on or off the power switch using the two holes on the cover. Insert a pointed object into the holes and press the power switch. Problem Solving Errors See Chapter 4, Error Types and Processing. Roll paper cover does not open (roll paper cover button does not work) 1. Open the auto cutter cover. 2. Then turn the knob until you see in the opening, as shown in the illustration below.
Clearing Paper Jams CAUTIONS: Take care not to let metal objects come into contact with the thermal head. Metal can damage the head. Do not touch the thermal head or radiation plate. Printing can cause them to become very hot. 1. Open the roll paper cover. Note: See the previous section for steps to take if the roll paper cover does not open. 2. Next, turn power off. 3. Grasp the leading end of the receipt paper and pull the jammed paper. Note: Be sure to remove all of the paper.
TM-T88 Series Technical Manual Maintenance Procedures The inspection procedures described here are divided between two types: daily inspection, which can be performed by the individuals who use the unit on a daily basis, and periodic inspection, which should be performed by individuals who have a more detailed technical knowledge of the unit. Setup Paper particles, paper scraps, foreign matter Dirt, lint and dust inside components Inspection item Action Check for proper connection of cables.
Cleaning Thermal head CAUTIONS: ❏ Turn off the printer power before cleaning. ❏ Note that the thermal head (thermal element and radiation plate) becomes very hot during normal operation, creating the danger of burn injury. Be sure to wait for about 10 minutes after turning printer power off before beginning the cleaning. 1. Open the paper roll cover. 2.
TM-T88 Series Technical Manual CAUTION: Do not use alcohol, benzene, thinner, trychloroethylene, ketone or other similar agents for cleaning. Such agents can cause deformation, deterioration, and damage to plastic and rubber components. Dirt, lint, dust Use a vacuum cleaner to completely remove all dirt, lint, and dust. CAUTION: After vacuuming, check all components for proper lubrication. If lubrication is deteriorated or low, wipe it away and re-lubricate.
Tool list The required tools for this printer are as follows: ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ Brush #1 Cleaning brush Phillips screwdriver No.1 Phillips screwdriver No.
TM-T88 Series Technical Manual Chapter 4 Troubleshooting Guide The following tools make it easy to determine the cause of any problems that occur. Self-test This procedure tests control circuitry (other than serial communication and parallel communication send/receive control) and the printer mechanism. Troubleshooting flowcharts These flowcharts guide you through analysis of problems on a unit-by-unit basis.
Troubleshooting Flowcharts The troubleshooting flowcharts help to locate the causes of problems that are not immediately apparent. Start Power on POWER LED lit? No 1 Yes PAPER OUT LED lit? No Roll paper loaded? Yes ERROR LED lit? Yes No 2 No Load roll paper. Yes ERROR LED flashing? Problem solved? No 4 Yes Yes END Perform self-test. Operation OK? No No 5 Roll paper cover open? No Yes 3 Yes Send data from host. Close cover.
TM-T88 Series Technical Manual 1 POWER does not turn on. 1 DC cable connection OK? No Correctly connect DC cable. Yes No Operation OK? Yes END External power supply output voltage OK? (24v DC with no load.) No Replace external power supply Yes END No Fuse F1 conducting? Yes Replace fuse F1. No POWER LED conducting? Operation OK? No Yes Replace switch circuit board unit. No Operation OK? Replace main circuit board END Rev.
2 PAPER OUT LED does not light. 2 Check near end sensor No Near end sensor conducting OK? Replace near end sensor. Yes No Operation OK? Check paper end sensor Yes END No Paper end sensor conducting OK? Replace paper end sensor. Yes No Operation OK? Yes END Replace main circuit board unit. END 4-4 Troubleshooting Guide Rev.
TM-T88 Series Technical Manual 3 ERROR LED is lit. 3 No Roll paper cover sensor conducting OK? Replace roll paper cover sensor. Yes No Replace main circuit board unit. Operation OK? Yes END END Rev.
4 ERROR LED is flashing. 4 Perform necessary procedures to clear error condition. See Error types and processing section in this chapter. END 4-6 Troubleshooting Guide Rev.
TM-T88 Series Technical Manual 5 Self-test does not work correctly. 5 Not at all Does not work at all? Cover closed? Yes it prints, but results are abnormal. No Close cover correctly. Yes No Replace thermal head. Operation OK? Yes Yes Operation OK? END END No Replace main circuit board. Roll paper cover sensor set conducting OK?(*1) No Replace roll paper cover sensor. END Yes No Operation OK? Yes END SW1 of switch circuit board unit conducting OK? No Replace switch circuit board unit.
6 Data from host is not printed correctly. (For RS-232 interface) 6 Turn SW1 of DIP switch bank 1 OFF. Send data from host to printer. “?” printed? Yes No Are RS-232 parameters of host and printer identical? No Change parameters so they are identical. Yes Operation OK? No I/F cable conforms with specifications? Yes END No Change to specified cable.
TM-T88 Series Technical Manual Error Types and Processing Error types Errors that automatically recover Table 4.1 Errors That Automatically Recover ERROR LED Blinking Pattern Error Description Recovery Print head temperature error The temperature of the print head is extremely high. Recovers automatically when the print head cools. Cover open error Printing is not performed correctly due to a cover open Recovers automatically when cover is closed. Approx.
Errors that are impossible to recover CAUTION: When any error shown below occurs, turn off the power as soon as possible Table 4.3 Unrecoverable Errors ERROR LED Blinking Pattern Approx. 160 msec Error Description R/W error in memory or gate array After R/W checking, the printer does not work correctly. Impossible to recover. High voltage error The power supply voltage is extremely high. Impossible to recover. Low voltage error The power supply voltage is extremely low. Impossible to recover.
TM-T88 Series Technical Manual Printer Operation when an Error Occurs The printer executes the following operations when detecting an error. ● Stops all printer operations. ● Goes BUSY (when DIP switch 2-1 is off). ● Blinks the ERROR LED. Data Receive Error (only with the serial interface model) If one of the following errors occurs during serial interface communications, the printer prints “?” or ignores the data, depending on the setting of DIP switch 1-1.
TM-T88 Series Technical Manual Chapter 5 Disassembly, Assembly, and Adjustment Before starting disassembly, assembly, and adjustment Be sure to observe the following important points whenever performing disassembly, assembly, or adjustment. CAUTION: Disconnect the power supply unit from the printer before beginning work. Current continues to flow through internal circuitry even when the printer’s power switch is turned off.
Head (top) Head (side) Body Washer (assembled) C (Cross) P (Pan) S-tite (O) B (Bind) T-B C (Cup) B-tite P-tite Using This Manual This section explains a number of general conventions used in this manual. Titles The titles that appear inside the sections of this manual describe the assembly and disassembly of major parts and blocks. Not all of the parts (service parts) are indicated as titles.
TM-T88 Series Technical Manual TM-T88 Series Disassembly, Assembly, and Adjustment Level 1 Disassembly and Assembly Cover-Thermal-AA 1. Press the lever and open the roll paper cover. 2. Remove the four {CC M3x4} screws. 3. Remove {cover-thermal-AA}. First detach the four dowels and then remove {cover-thermal-AA}. CC M3x4 Cover-thermal-AA CC M3x4 D C B C D D D A B Roll paper cover A Lever To install, reverse the removal procedure. Rev.
Case-lower-AA block 1. Remove the three {CCS-tite M3x8} screws. 2. Remove {IC cover}. 3. Remove [case-lower-AA block]. CAUTION: During installation, make sure you do not pinch the {FFC} or {FFC-B} between the case and mechanism. Doing so can result in malfunction. Note: See page 5-8 for further disassembly and assembly of [case-lower-AA block]. D C B C D D D A B A FFC-B FFC IC cover Case-lower-AA block CCS-tite M3x8 To install, reverse the removal procedure.
TM-T88 Series Technical Manual Case-thermal-upper-AA 1. Press the lever and open the roll paper cover. 2. Remove the single {CCS-tite M3x8} screw. You will see three screws when you open the roll paper cover. Remove the one on the back of the printer. 3. Close the roll paper cover. 4. Slide off {case-thermal-upper-AA}. Remove {case-thermal-upper-AA} while pressing the lever to cause bending on the inside. Note: During installation, insert the {FFC-B} inside the case.
Cover-cutter-AA Detach the two dowels and remove {cover-cutter-AA}. Cover-cutter-AA D C B C D D D A B A To install, reverse the removal procedure. M-T88 printer mechanism block 1. Detach the two {FFC} and {FFC-B} connectors from {main circuit board unit-A}. 2. Slide off {power switch assembly-C} from [plate-circuit board block]. CAUTION: During installation, take care to ensure that the switch is positioned correctly.
TM-T88 Series Technical Manual Note: During installation, align the two [plate-circuit board block] dowels into the two holes on {platemechanism} which is mounted on [M-T88 printer mechanism block]. 5. Remove {FFC-B} from [M-T88 printer mechanism block]. Note: The {FFC-B} service part is not supplied pre-bent. When installing the {FFC-B} service part, make sure to bend it in the same shape as the {FFC-B} being replace. See page 5-9 for further disassembly and assembly of [M-T88 printer mechanism block]. 6.
Level 2 Disassembly and Assembly Case-lower-AA block Remove the four {rubber foot Y24N5} from {case-lower-AA} while pressing the two tabs on the {rubber foot Y24N5} to cause bending on the inside. Case-lower-AA Rubber foot Y24N5 To install, reverse the removal procedure. 5-8 Disassembly, Assembly, and Adjustment Rev.
TM-T88 Series Technical Manual M-T88 printer mechanism block Remove the two {CPS-tite (O) M3x6} screws; then remove {plate-mechanism} from {mechanism assembly-B-M-T88}. Note: During installation, align the two {plate-mechanism} dowels into the two {mechanism assembly-BM-T88} holes; then secure the screws. Mechanism assembly-B-M-T88 Dowels Plate-mechanism CPS-tite (O) M3x6 To install, reverse the removal procedure.
Plate-circuit board block CAUTION: When performing this procedure, be sure to use a grounded wrist band and take other measures to protect against electrostatic charge. Internal circuit board components become hot during normal use. Make sure they have cooled sufficiently before performing this procedure. After removing these circuit boards, be sure to protect them against electrostatic charge damage by placing them in an anti-static bag. 1.
TM-T88 Series Technical Manual CPS-tite (O) M3x6 Seal-caution CPS-tite (O) M3x6 Plate-rear I/F circuit board assembly block Plate-circuit board CPS-tite (O) M3x6 Seal-waterproof CPS-tite (O) M3x6 side CPS-tite (O) M3x6 side Main circuit board assembly unit-A CPS-tite (O) M3x6 To install, perform the following procedure: 1. Affix {seal-caution} and {seal-waterproof} in the position shown in the illustration above. 2.
4. Install {I/F circuit board assembly block] and secure it with the two {CPS-tite (O) M3x6} screws. 5. While attaching the {main circuit board unit-A} connector to the [I/F circuit board assembly block] connector with no gap, secure {main circuit board unit-A} with the five {CPS-tite (O) M3x6} screws.
TM-T88 Series Technical Manual Note: Note that {plate-connector-AA} and {plate-connector-BA} must be oriented correctly when installed. See the illustrations for correct orientation. To install, reverse the removal procedure. Rev.
M-T88 Printer Mechanism Disassembly and Assembly Note: No adjustments are required for the M-T88 printer mechanism. Level 1 Disassembly and Assembly Cable Routing 1. Open up the two hooks on the right side of the printer 1 mm or 2 mm and remove the cables. 2. Unhook the cables on the left side of the printer. A Hook part B D A C D B C Hook part Hook part 5-14 Disassembly, Assembly, and Adjustment Rev.
TM-T88 series Technical Manual Use the following procedure to install the cables: 1. Install the cables onto the hooks of {frame assembly} as shown in the illustrations. 2. Bend the tips of the two hooks on the right side of {frame assembly} 1 mm or 2 mm to secure the cables in place. CAUTION: Do not bend the two hooks on the right side of {frame assembly} more than 2 mm. Doing so can cut the cable and cause a short circuit, which will result in malfunction of the printer. Rev.
Switch circuit board assembly-B 1. Remove the five cable connectors from {switch circuit board assembly-B}. 2. Remove the two {CBS-tite M3x5} screws and then {switch circuit board assembly-B}. A B Switch circuit board assembly-B D A C D B C CBS-tite M3x5 To install, reverse the removal procedure. 5-16 Disassembly, Assembly, and Adjustment Rev.
TM-T88 series Technical Manual Cover-frame assembly block 1. Remove the two {RE 2.0} retaining rings and then {shaft-cover}. 2. Remove [cover-frame assembly block]. Note: See page 5-29 for further disassembly and assembly of [cover-frame assembly block]. RE 2.0 Cover-frame assembly block RE 2.0 A Shaft-cover G-15 B Frame assembly D A C D B C The following is the installation procedure: 1. Lubricate {frame assembly} shaft with G-15. 2. Install [cover-frame assembly block]. 3.
Auto cutter unit block Remove the two {CBS-tite M3x5} screws and then [auto cutter unit block]. Note: See page 5-31 for further disassembly and assembly of [auto cutter unit block]. A B Dowels of frame assembly D CBS-tite M3x5 A C Auto cutter unit block D B C Holes in frame assembly The following is the installation procedure: 1. Run the [auto cutter unit block] cables through the holes in {frame assembly}. 2. Install [auto cutter unit block].
TM-T88 series Technical Manual CAUTION: You must follow the steps described below. If you do not follow them it could cause an auto cutter operation failure. 1. Secure the right side screw. 2. Secure the left side screw. 3. Loosen the screw securing {cover-paper cutter assembly} once; then secure it again. 2 1 3 Note: While securing these screws, do not deform {frame assembly}. This can damage the cutter. N.E. detector assembly block 1. Detach the {lead wire-N.E. detector} from [N.E.
Note: Use a flat-blade screwdriver or coin to rotate {screw-detector adjustment}. See page 5-33 for further disassembly and assembly of [N.E. detector assembly block]. RE 1.5 Hexagon nut M3 Screw-detector adjustment A B N.E. detector assembly block D A C Lead wire-N. E. detector D B C To install, reverse the removal procedure. 5-20 Disassembly, Assembly, and Adjustment Rev.
TM-T88 series Technical Manual Paper guide unit block 1. Remove the single {CBS-tite M3x5} screw. 2. Detach the tabs on the back of [paper guide unit block] from {frame assembly}. 3. Remove [paper guide unit block]. Note: See page 5-35 for further disassembly and assembly of [paper guide unit block]. Paper guide unit block CBS-tite M3x5 Tab on rear panel of paper guide unit block Tabs on the front of paper guide unit block A B Frame assembly D A C D B C Tab on frame assembly Rev.
The following is the installation procedure: 1. Position the two tabs on the front of [paper guide unit block] so they are below the two {frame assembly} tabs. 2. Install [paper guide unit block] on {frame assembly}. When installing [paper guide unit block], make sure that the {motor-paper feed-receipt} and {paper detector assembly} cables are positioned as shown in the illustration below. CAUTION: Make sure that cables are not pinched between [paper guide unit block] and {frame assembly}.
TM-T88 series Technical Manual Detector circuit board assembly-A 1. Remove the single {RE 2.5} retaining ring and then {lever-cover open}. 2. Disconnect the {lead wire-cover open detector} connector from {detector circuit board assembly-A}. 3. Remove the single {CBS-tite M3x5} screw and then {detector circuit board assembly-A}. A B CBS-tite M3x5 D A C D B C RE 2.5 Detector circuit board assembly-A Lever-cover open Lead wire-cover open detector Rev.
The following is the installation procedure: 1. Aligning the single dowel, install {detector circuit board assembly-A} and secure it in place with the single {CBS-tite M3x5} screw. 2. Connect the {lead wire-cover open detector} connector to {detector circuit board assembly-A} 3. Install {lever-cover open} on {frame assembly}. At this time, align the arm of {lever-cover open} between the two dowels on {frame assembly} as shown in the illustration.
TM-T88 series Technical Manual CAUTION: Be sure to hold the two {spring-press heads} while removing {plate-spring press}. Otherwise, {spring-press heads} may suddenly fly out, creating the danger of eye injury. 4. Detach {spring-press heads} from {plate-spring press}. 5. Remove {thermal head}. 6. Disconnect {FFC} from {thermal head}. CAUTION: After removing {thermal head}, be sure to protect it against electrostatic charge damage by placing it in an anti-static bag.
The following is the installation procedure: 1. Attach {FFC} to {thermal head} so that the surface of {FFC} with text printed on it is facing the {plate-spring press}. 2. Place {thermal head} in its installation position inside the printer. 3. Insert the two {spring-press heads} onto the two {plate-spring press} dowels. 4. Place {plate-spring press} in its installation position. 5. Insert the two {spring-press heads} into the groove of {thermal head}. 6.
TM-T88 series Technical Manual Motor-paper feed-receipt 1. Remove the single {RE 2.5} retaining ring, and then {gear-deceleration}. 2. Remove the two {CBS-tite M3x5} screws and then {motor-paper feed-receipt}. Gear-deceleration A RE 2.5 B CBS-tite M3x5 D A C CBS-tite M3x5 D B C Motor-paper feed-receipt The following is the installation procedure: 1. Aligning the single dowel, install {motor-paper feed-receipt} and secure it with the two {CBS-tite M3x5} screws. 2.
Frame assembly 1. Remove the single {CBS-tite M3x5} screw and then {spring-cover}. 2. Remove the two {CBS-tite M3x5} screws from {frame assembly}. A CBS-tite M3x5 Spring-cover B G-15 D CBS-tite M3x5 A C D B C Frame assembly To following is the installation procedure: 1. Secure the two {CBS-tite M3x5} on {frame assembly}. 2. Install {spring-cover} and secure it with the single {CBS-tite M3x5} screw. 3. Lubricate {spring-cover} with G-15.
TM-T88 series Technical Manual Level 2 Disassembly and Assembly Cover-frame assembly block 1. Remove {spring-shutter}. 2. Remove the four {CBS-tite M3x5} and then {cover-roll paper}. 3. While peeling off the back seal, remove {label-handling-BA}. 4. While opening {shutter blade assembly}, detach the two tabs and then remove {fixed blade}. CAUTION: Be careful because {fixed blade} is equipped with a sharp blade. Handle it with care. Note: Note that {fixed blade} must be oriented correctly when installed.
Note: Note that you cannot remove {shutter blade assembly} although the illustration below shows that it is removed. Cover-roll paper Fixed blade Shaft holder-platen CBS-tite M3x5 RE 2.5 Spring-shutter Label-handling-BA Spring-fixed blade holder Shutter blade assembly (never disassemble this) CBS-tite M3x5 Platen assembly To install, reverse the removal procedure. 5-30 Disassembly, Assembly, and Adjustment Rev.
TM-T88 series Technical Manual Auto cutter unit block 1. Remove the two {CB M2x2.5} screws and then {emergency cutter}. 2. While peeling the back seal, remove {label-handling-BB}. 3. Remove the single {CBS-tite M3x5} screw and then {cover-paper cutter assembly}. 4. Remove the single {CB M2x2.5} screw and then {motor-paper cutter sub-assembly}. 5. Remove {screw-switch} and then {microswitch MLS-1Aus}. 6. Remove the four {shield tube} from {lead wire-paper cutter}. 7.
The following is the installation procedure: 1. Pass {guard tube} through {lead wire-paper cutter}. 2. Pass the four {shield tubes} through the four wires of {lead wire-paper cutter} individually. 3. Solder {lead wire-paper cutter} to {motor-paper cutter sub-assembly} and {microswitch MLS-1Aus} in accordance with the following table. Terminal {Lead wire-paper cutter} Lead wire color Motor (+) Terminal Red Motor (-) Terminal Black Microswitch Terminal White Microswitch Terminal White 4.
TM-T88 series Technical Manual CAUTION: Make sure that {lead wire-paper cutter} is not pinched between {cover-paper cutter assembly} and {frame-paper cutter assembly}. Install {cover-paper cutter assembly} while aligning the drive shaft on {cover-paper cutter assembly} into the slot on the blade of {frame-paper cutter assembly}. See the illustration below. Drive shaft Gear-drive Slot in the blade 14. Secure {cover-paper cutter assembly} with the single {CBS-tite M3x5} screw. 15.
The following is the installation procedure: 1. Install {lever-N.E. detector} on {holder-N.E. detector}. CAUTION: The two {lever-N.E. detector} dowels break easily. Take care when performing the above step. After installation, check for smooth operation of {lever-N.E. detector}. If operation is not smooth, remove {lever-N.E. detector} and re-install it. 2. Align the single dowel and install {microswitch D2A-1120} on {holder-N.E. detector}. 3.
TM-T88 series Technical Manual Paper guide unit block 1. Slide off {plate-shield}. 2. Detach the two tabs and remove {paper detector assembly}. 3. Remove {button-open} and {spring-button}. CAUTION: Be sure to hold {spring-button} while removing {button-open}. Otherwise, {springbutton} may suddenly fly out, creating the danger of eye injury. To remove {button-open}, keep it depressed while you remove the protruding part of {button-open} from the groove in {paper guide}.
The following is the installation procedure: 1. Place {spring-button} on the {paper guide} dowel. 2. Align the top of {spring-button} with the inside of {button-open}. CAUTION: Be sure to hold {spring-button} during this procedure. Otherwise, {spring-button} may suddenly fly out, creating the danger of eye injury. 3. Insert the protruding part of {button-open} into the groove in {paper guide}. See the illustration below. 4.
TM-T88 Series Technical Manual Appendix IEEE 1284 Parallel Interface (Bidirectional parallel interface: in accordance with the IEEE 1284 nibble/byte modes) Copyright © 1994 by the Institute of Electrical and Electronic Engineers, Inc.
Reverse mode (Data transmission from printer to host) The STATUS data transmission from the printer to the host is accomplished in the Nibble or Byte mode. This mode allows data transmission from the asynchronous printer under the control of the host. Data transmissions in the Nibble mode are made via the existing control lines in units of four bits (Nibble). In the Byte mode, data transmission is accomplished by making the 8-bits data lines bidirectional.
TM-T88 Series Technical Manual Printer status and signals Pin No.
❏ Data transmission should not ignore the signal nAck or Busy. An attempt to transmit data with either signal, nAck or Busy, ignored can cause lost data. (Data transmission to the printer should be made after verifying the nAck signal or while the Busy signal is low.) ❏ Interface cables should be as short as possible.
TM-T88 Series Technical Manual Notes on setting DIP switch 2-1 to ON ❏ The printer mechanism stops but does not become busy when an error has occurred, the cover is open, printing stops due to a paper end, or paper is fed using the PAPER FEED button. ❏ When setting DIP switch 2-1 to ON to enable handshaking with the printer, be sure to check the printer status using the GS a command and the ASB function. In this setting, the default value of n for GS a is 2.
Notes: ❏ The handshaking data word length, baud rate, and parity depend on the DIP switch settings. ❏ Data transmitted from the printer has 1 stop bit (fixed). ❏ DR1 > DR2 CS1 > CS2 indicates that: Channel 1 is high. Channel 2 is low. ❏ DR1 < DR2 CS1 < CS2 indicates that: Channel 2 is high. Channel 1 is low.
TM-T88 Series Technical Manual ❏ When the printer stops printing due to a paper-end (in cases when an empty paper supply is detected by either the paper roll end detector or the paper roll near-end detector with a printing halt feature enabled due to paper shortage by ESC c 4). ❏ During macro executing standby status. ❏ When a temporary abnormality occurs in the power supply voltage. ❏ When an error has occured.
RS-485 interface connector pin assignments and functions (continued) Pin number Signal name I/O Function 7 SG - Signal ground 8 RD1 O 1) When DTR/DSR is selected, this signal indicates whether the host computer is BUSY or READY. DR1 > DR2 indicates that the printer is READY and DR1 < DR2 indicates that the printer is BUSY. The BUSY condition can be changed depending on the off-line conditions set by the DIP switches.
TM-T88 Series Technical Manual Notes: ❏ When the remaining space in the receive buffer drops to 16 bytes, the printer status becomes "buffer full" and it remains "buffer full" until the space in the receive buffer increases to 26 bytes. ❏ The printer ignores the data received when the remaining space in the receive buffer is 0 bytes.. XON/XOFF Transmit Timing When XON/XOFF control is selected by the DIP switch, the printer transmits XON/OFF to the host according the table below.
"H" indicates: SD1 < SD2 RD1 < RD2 "L" indicates: SD1 > SD2 RD1 > RD2 The transmission data is H = 1, L = 0 Note: This format is used when the UART for RS-232 is connected to the RS-485 driver.
TM-T88 Series Technical Manual Main Circuit Board Unit-A Parts Layout (parts side) Part No. 202254500 Figure A-2 Rev.
Main Circuit Board Unit-A Parts Layout (solder side) Part No. 202254500 Appendix A-12 Rev.
TM-T88 Series Technical Manual Main Circuit Board Unit-A Parts Layout (parts side) Part No. 202254501 Rev.
Main Circuit Board Unit-A Parts Layout (solder side) Part No. 202254501 Appendix A-14 Rev.
TM-T88 Series Technical Manual RS-232 Serial Interface Circuit Board Parts Layout Figure A-3 Rev.
IEEE 1284 Parallel Interface Circuit Board Parts Layout R25 R54 C32 R2 R53 R24 C5 C33 R40 36 19 1 RM12 C21 C11 7W74 C20 C22 U9 C16 R10 R16 1 CU7 CU5 C30 C29 C31 C28 Q4 C4 7W32 1 C19 U5 C18 R14 C27 P a r t s DNO C17 R28 RM11 C10 R45 R7 R46 R39 R50 R27 R32 U7 R52 R23 R30 R36 R11 R29 18 R43 R42 R12 R26 R31 Q5 26 HCT373 CU9 R15 12 R13 6 7 R49 1 R51 202055900 5 R48 Figure A-4 19 36 18 RN1 X1 CU10 U2 1 1 EPSON U11 CN2 CU11 CU1 1 LS244 U10
TM-T88 Series Technical Manual RS-485 Serial Interface Circuit Board Parts Layout 25 1 R9 R3 R6 U2 R1 TP1 R10 U1 R R15 TP2 R5 R18 1 R13 R11 R12 1 R7 R4 C5 CMK-G2X 13 R8 R2 CN1 RS485-30P BOARD 14 R14 R16 R19 R17 CN2 1 2 16 17 15 14 30 29 Figure A-6 Switch Circuit Board Assembly-B Figure A-7 Rev.
Case Unit Parts Name List Case unit parts List Ref.
TM-T88 Series Technical Manual M-T88 Printer Mechanism Parts Name List M-T88 Printer Mechanism Parts Name List Ref. # Part Name 100 CBS-tite M3x5 101 switch circuit board assembly-B 200 RE 2.0 201 shaft-cover 202 spring-shutter 203 CBS-tite M3x5 204 cover-roll paper 205 label-handling-BA 206 fixed blade 207 spring-fixed blade holders 208 RE 2.5 209 platen assembly 210 shaft holder-platen 211 cover-frame 300 CBS-tite M3x5 301 CB M2x2.
M-T88 Printer Mechanism Parts Name List Ref. # Part Name 405 screw-detector adjustment 406 hexagon nut M3 407 lead wire-N.E. detector 500 CBS-tite M3x5 501 plate-shield 502 paper detector assembly 503 button-open 504 spring-button 505 paper guide 600 RE 2.
TM-T88 Series Technical Manual Overall Exploded Diagram Case Unit 100 101 800 100 301 800 400 900 300 805 500 902 701 800 302 901 804 C 803 600 D 800 A B A b a 500 702 802 801 601 C 601 200 801 200 806 601 501 700 502 500 201 200 801 B a D Rev.
TM-T88 Series Technical Manual M-T88 Printer Mechamism 200 405 201 203 204 505 500 211 E 503 206 200 504 400 208 202 207 207 205 203 301 401 407 210 501 502 D 209 900 303 B 404 406 901 902 403 800 302 801 402 304 E 802 A 305 903 900 101 704 306 700 309 310 307 802 100 702 300 703 100 308 D B 604 312 A C 601 803 311 600 700 705 C 313 701 603 602 Rev.
TM-T88 Series Technical Manual Lubrication Points Diagram M-T88 Printer Mechanism E D B E G-19 G-15 A G-15 G-19 D B G-15 C G-15 A C Rev.
TM-T88 Series Technical Manual Circuit Board Diagram Main Circuit Board Unit-A +24 F R50 1 R5 04 Q502 RM3 RM2 RM1 VCC R46 RPFCOM Q511 D52 4 VCC 8 7 6 5 8 7 6 5 8 7 6 5 QM501 Q504 R47 D50 5 D506 DSW2 1 2 3 4 1 2 3 4 1 2 3 4 DSW2 1 DSW2 2 DSW2 3 #1 DSW2 4 DSW2 5 DSW2 6 #6 RPF_+A R505 RPF_+B R506 RPF_-A R507 RPF_-B R508 1 Q505 D50 1 8 9 PF_A+ R510 D50 2 6 7 PF_B+ R511 D50 3 4 5 PF_A- D50 4 2 3 PF_B- R512 1 0 VCC DSW1 DSW1 1 DSW1 2 DSW1 3 DSW1 4 DSW1 5 DSW
RS-232 Interface Board +5V DD5V D1 CEN7..
IEEE 1284 Interface +5V DD5V D1 CEN7..
RS-485 Interface Board TP2 R12 +5V R9 U2 R13 CS1 8 1 CS2 7 2 CTS DR2 6 3 DR DR1 5 4 CS1 + 5 V R10 CS2 R8 RD1 RD2 R1 +5V CTS U1 R6 8 1 7 2 SD2 6 3 SD1 5 4 DR R3 CN2 SG R5 R2 TO MAIN BOARD RD SD R17 CTS SG R16 DR SG SG R18 +5V +5V TO HOST SG FG SD/SD1 RD/SD2 RS/RD1 /RD2 DR/INIT1 SG /DR1 /DR2 /CS1 /CS2 ER INIT2 SHELL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 FG 0 FG C5 + 5 V CN1 SD2 SD1 RD2 RD1 SG DR2 DR1 CS2 CS1 R11 R4 TP1 S
TM-T88 Series Technical Manual Switch Circuit Board Assembly-B TO MACHANISM TO SUB BOARD CN1 PF A PF /A PF COM PF COM PF B PF /B AC A AC /A ACSW1 ACSW2 PFSWIN GND DRCPT DERR RCOVER RNE RRE RRES VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 CN2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 1 2 3 4 5 6 1 2 3 4 5 6 PF A PF /A PF COM PF COM PF B PF /B PF MOTOR AC A AC /A ACSW1 ACSW2 AUTO CUTTER C(N)1 GND CN3 1 2 3 4 1 2 3 4 VCC SW1 1 GND 2 D1 1 2 (RED) D2 1 2 (RED) GND D3 R1 VCC
