Service Manual DOT MATRIX PRINTER MODEL CBM-710/720 Rev.1.
CONTENTS Chapter 1. Printer Disassembly and Assembly ....................................................................................... 1 1 2 3 4 5 6 How to Remove Upper Cover and Rear Cover ............................................................................................ How to Remove The Printer Mechanism ...................................................................................................... How to Remove the Control Board ...................................................
CBM-710/720 Service Manual Chapter 1 Printer Disassebly and Assembly 1
CBM-710/720 Service Manual 1. How to the Upper Cover and Rear Cover 1) 2) Unfasten 4 screws (M3 x 6) as shown in the figure and lift the upper cover upward, while disconnecting the connector. Unfasten 4 screws (M3 x 6) at both sides and remove the rear cover.
CBM-710/720 Service Manual 2. How to Remove the Printer Mechanism • Remove the upper cover. • Unfasten 2 screws (M3 x 14) as shown in the figure. • Lift the printer mechanism in the arrow position for removal. Printer Mechanism 3. How to Remove the Control Board • Remove the rear cover. • Disconnect each connector. • Unfasten 4 pieces of board mounting screws for removal of the control board.
CBM-710/720 Service Manual 4. How to Remove the Power Board and AC Power Unit 1) 2) How to Remove the Power Board • Disconnect 2 connectors. • Unfasten 2 screws (M3 x 8) and 2 tapping screws (M3 x 8). • Remove the board, paying attention to the lead wire. How to Remove the AC Power Unit • Unfasten 2 inlet set screws (M3 x 10) and an earth wire mounting screw (M4 x 6). • Unfasten 2 noise filter plate mounting screws (M3 x 6). • Unfasten 4 power transformer mounting screws (M4 x 6).
CBM-710/720 Service Manual 5. How to Remove the Auto Cutter Unit (720) • Remove the printer mechanism from the main body. • Remove 2 E3’s as shown in the figure. • Pull out the shaft in the arrow direction for removal of the auto cutter unit. (Note that 2 spacers come off at the same time). Auto Cutter Unit Spacer Printer Mechanism 6. How to Remove the Operation Panel Board and PE Sensor Board • Remove the upper cover and unfasten 2 tapping screws for removal of the operation panel board.
CBM-710/720 Service Manual Chapter 2 Circuit Description 6
CBM-710/720 Service Manual 1. Outline A block diagram of this printer is shown in Fig. 1-1. It consists of the control circuit centered around CPU, ROM, RAM and peripheral circuits, interface circuit for interfacing with each host computer, operator panel circuit for operating switch input and LED display, printer mechanism, auto cutter, and power circuit for furnishing power supply to each part. Fig.
CBM-710/720 Service Manual 2. CPU Peripheral Circuits 1) CPU and ROM/RAM The CPU M50734SP has a external memory type. Lower 8-bit address is fetched via the A0/D0 bus line by the 8-bit latch LS373. The 128-KB ROM and 64-KB RAM are used for performing the backup operation for power failure by the super capacitor. The ceramic oscillator is used as CPU clock and transmits 7.37 MHz. Fig.
CBM-710/720 Service Manual As can be seen in the timing chart, it detects that Vcc decreased up to about 4.5 V for power failure and generates the power failure interrupt signal and sends it to CPU. Upon receipt of the signal, CPU transmits the data in its buffer to RAM. This processing is done within about 200 µs. After about 1 ms, the reset signal is generated at IC12 and given to CPU, etc., causing all circuits to reset for prevention of explosive running.
CBM-710/720 Service Manual 3. Printer Control Circuit 1) 2) 3) Printer CN6 Winder Operation Panel Printer 4) 5) When L is output to the CPU port P31, the motor rotates and a timing pulse appears at the DP terminal of CN5. After rotation of the motor, printing starts in timing at which the port P34 is changed into L from H by the home pulse of the printer. In 9 ports of CPU output ports P20 to 27 and P30, the L pulse is output to the necessary port.
CBM-710/720 Service Manual 4. Cutter Control Circuit Cutter Side X Y S Fig. 4-1 Cutter Control Circuit The cutter control circuit is as shown in Fig. 4-1. In the cutter side, M indicates the motor and S the home switch. The motor can make forward and reverse rotation by controlling X and Y inputs of the control circuit as shown in the table below. Normal Reverse Stop Stop X H L L H Y L H L H The timing chart is provided in Fig. 4-2.
CBM-710/720 Service Manual 5. Interface with Operation Panel As shown in Fig. 5-1, the operation panel circuit has the on-line switch and line feed switch. Each switch is connected to CPU input ports and each LED is connected through the driver to CPU output ports. Control circuit Operation Panel Circuit Vcc LED1 POWER R1 LED2 CPU ON-LINE P04 R2 LED3 ALARM P05 R3 SW1 ON-LINE SW2 FEED P35 P36 Fig.
CBM-710/720 Service Manual 6. Paper End Sensor Circuit Fig. 6-1 shows the paper end sensor circuit. The reflection type photo-interrupter is used as a sensor. When some paper is still left, the light reflected by paper strikes upon the photo-transistor; thus, the collector of the phototransistor is L. When paper becomes short, no light is reflected, causing the collector to go H. As a result, the CPU input port P40 becomes H, going into the paper end state.
CBM-710/720 Service Manual 7. Parallel Interface Circuit This circuit conforms to the standard interface. Description will be made for each signal of interface connector as follows. Fig. 7-1 shows the data input and print timing chart and Fig. 7-2 the parallel interface circuit diagram.
CN2 CN3 16P RA5 12-33kΩ IC137406 IC10 7406 IC1 50734SP R15 33k Vcc CBM-710/720 Service Manual Fig. 7-2.
CBM-710/720 Service Manual 8. Serial Interface Circuit As the serial interface specification, RS-232C and 20 mA current loop can be switched by the slide switch. It can be switched by the user although fixed by setting at delivery time. 1) RS-232C By using MAX232C for data receiving (RD), data transmitting and BUSY (DTR), data is transmitted and received at level of RS-232C. The baud rates of 110 to 9600 bps can be selected by switching the DIP switch.
CBM-710/720 Service Manual Fig.
CBM-710/720 Service Manual 9. RS422A Interface Circuit The RS422A interface circuit diagram is shown in Fig. 9-1. As can be seen in the figure, when TXD CONTROL is L, the line driver IC14 becomes enable, going into the ready-to-receive state. At this time, the line receiver IC15 becomes disable. When TXD CONTROL is H, IC14 becomes disable, while IC15 becomes enable, going into the ready-to-receive state.
CBM-710/720 Service Manual 10. Power Circuit This power circuit supplies DC 5 V for the control circuit and DC 24 V for driving the printer mechanism. When the POWER switch is turned on, the AC voltage is applied to the transformer T after noise is eliminated by the capacitors C1 to C4 and noise filter NF. For the secondary voltage of transformer, all waveforms are rectified at both the DC 5 V side and DC 24 V side.
CBM-710/720 Service Manual Chapter 3 Auto Cutter 20
CBM-710/720 Service Manual 1. Maintenance and Handling 1) Precautions for Handling (1) Precautions for use Do not cut the paper other than the specified recording paper or do not pull the recording paper on the way of cutting; otherwise, resulting in damage of the blade section and reduction of service life. (2) Precautions for storage Store the unit avoiding dust, dirt, high temperature and high humidity. 2) Cleaning (1) Remove the dust of recording paper properly.
CBM-710/720 Service Manual 2. Mechanism and Principle of Operation 1) Outline of Mechanism The AC-2 and AC-3 are designed as the DP-505 and DP-600 small dot printers and characterized by compact and lightweight types. The mechanism of this unit consists of 4 blocks; frame, power transmission mechanism, detector, and movable blade mechanism. 2) Mechanism and Principle of Operation 2)-1 Power transmission mechanism Cutter Gear Worm Motor Gear Fig.
CBM-710/720 Service Manual Cam Switch Cutter Gear Fig. 2 Fig. 3 2)-3 Movable blade mechanism The movable blade is changed into a linear motion by the crank pins and starts cutting the recording paper. (1) Full cut Blade Fig. 4 Crank Pin At full cut, the crank pins turn one time and return to the home position. The movable blade moves 12 mm. (2) Partial cut Fig. 5 At partial cut, the crank pins go into reverse at the moment they receive the switch signal and return to the home position.
CBM-710/720 Service Manual 3. Repairing (Troubleshooting) For troubleshooting, the repairing method will be explained by classifying the items as shown below. Make sure of the cause according to the items and find out the trouble portions for repairing. (1) Phenomenon ----------------- Find out the phenomenon of trouble from this column. (2) Condition --------------------- Even in the same faulty phenomenon, the trouble condition may be different. Check it, comparing with the content of this column.
2. The recording paper cannot be cut. 1. The motor does not rotate. Phenomenon Cause 25 1. Deformation of the cutter cover 2. Clogging of paper wastes or oil shortage of the blade sliding section 1. Damage or abrasion of the movable blade • Full cut is normal • In partial cut, four uncut portions or more remain • The blade does not cut well • Dismount the movable blade to check its edge. • Detach the cutter cover to check its warping, etc. • Detach the cutter cover to check the paper dust.
CBM-710/720 Service Manual 4. Disassembly/Assembly 1) Disassembling Procedure Perform the disassembly in a reverse manner of the assembling procedure. 2) Assembling Procedure Perform the assembly according to the assembling procedure as shown in the separate table. Numbers in Exploded View at the end of this chapter are used as drawing numbers.
CBM-710/720 Service Manual 27
CBM-710/720 Service Manual Chapter 4 Circuit Diagram 28
CBM-710/720 Service Manual Fig. 4-1.
CBM-710/720 Service Manual Fig. 4-2. Noise Filter Circuit Diagram CBM710/720-002-00 Fig. 4-3.
CBM-710/720 Service Manual Fig. 4-4. Paper End Sensor Circuit Diagram CBM710/720-004-00 Cord Assy CA5 PC Board PC710-06 Fig. 4-5.
4-6. Circuit Diagram: Parallel (PE) 2 3 1 CN9 Vcc CBM710/720-006-00 CN3 16P 1 4 6 5 2 7 3 13, 18 12 10 11 32 1 31 2 3 4 5 6 7 8 9 14, 16, 30 33, 19-29 17 16 15 14 13 12 11 10 9 8 Vcc 12 RA5 12-33kΩ 10 4 1 13 10 3 8 9 13 2 12 13 13 C20 471 00 01 02 03 04 05 06 07 GND 101RH C9 x2 6 C103 222 1A4 1Y4 1A3 1Y3 1A2 1Y2 1A1 1Y1 2A4 2Y4 2A3 2Y3 2A2 2Y2 2Y1 2Y1 10 2G 1 Vcc Printer CN4 17P 1, 8, 9, 10 15 Winder Ope.
C103 Vcc 233 IC14 JC15 R43 R33 CN2 CN3 10K MAX232 3.3K 14 FAULT 11 6 14 14 12 12 13 PE 7 11 RESET 11 10 9 8 R3410K 8 13 14 23 C. BUSY R 12 2/1PHCI 2 5 Tr12 C2785 13 01 4 3 Vcc 13 1 C. BUSY 15 14 R56 11 R37 220 10K R. BUSY 10 14 13 20 1/2PHCI 10 Tr13 C2785 4 CBM710/720-007-00 22 2 18 3 7 1 Printer 11 GNC SOL SOL SOL SOL SOL SOL SOL SOL SOL VP Printer Winder Ope. Panel CN6 7P CN7 12 RA5 8-10 RA3 9-10KΩ 1 4 8 8 3 5 C102 473 Tr6 2SB731 6 8 2 10 10 9 11 7 VP Tr11 2SD809(1) R29 4.
CN2 CBM710/720-008-00 3 1 CN3 1 RD R32 12 10 18 IC14 SN75113N ( Vcc 60.8 ) 9 13 3 SD R33 10 12 6 14 R38 4.7K R37 4.7K C21 2 2 1 2 3 13 10 Tr3 2SC2758 4 101RH C9 C10 x2 OSC1737 R34 4.7K 4 Vcc – + NC R40 47K Vcc NC 60 61 62 63 1 2 3 4 DS2 Printer Vcc 2 CN4 17P 14 6 13 7 12 4 11 5 3 SOL SOL SOL SOL SOL SOL SOL SOL SOL 1 2 3 4 5 6 7 8 9 1 3 01 7 2 9 3 11 4 15 5 17 6 21 7 23 8 9 VP 1, 8, 9, 10 MOTOR CCSOL LFSOL Winder Ope.
CBM-710/720 Service Manual Chapter 5 Parts List 35
CBM-710/720 Service Manual PARTS LIST 1. Exploded View Ref. No. Parts No.
CBM-710/720 Service Manual PARTS LIST Ref. No. 25 26-1 CBM-710/720 Parts No.
CBM-710/720 Service Manual CBM-710,720 27-2 27-1 26-2 26-1 23 34 24 25 33 38
CBM-710/720 Service Manual 20-1 CBM-710 34 4 32 5 32 37 34 8-1 3 35 18-1 18-2 2 19 38 17 7 31 30 11 30 13 16 12 30 6 35 14 38 15 34 33 35 21 34 22 39
CBM-710/720 Service Manual 37 CBM-720 20-2 34 4 32 20-1 5 32 3 34 8-1 35 2 18-1 18-2 19 38 17 1 7 31 30 11 30 13 16 12 30 6 35 14 38 15 33 35 34 21 34 22 40
CBM-710/720 Service Manual PARTS LIST 2. Block Diagram Ref. No. CA CBM-710/720 Parts No.
CBM-710/720 Service Manual BLOCK DIAGRAM 42
CBM-710/720 Service Manual PARTS LIST 4. Power Supply Unit CBM-710/720 Ref. No. Parts No. IC 1 E 390-110 Regulator M5231TL 1 TR 1 2 3 E 324-010 E 360-040 E 359-278 Transistor Transistor Transistor 2SB974L 2SD1310M1 2SC2785HF 1 1 1 1-4 6-9 5 E 400-130 Diode GP-15B 8 E 400-010 Diode 1S1588 1 E 405-130 Zener Diode RD5.
CBM-710/720 Service Manual INSULATOR Screw M3x8/2 Screw M3x6/2 Cord assy CA 8 D1 - D4, D6 - D9 : GP15B D5 : 1S1588 ZD1 : RD5.
CBM-710/720 Service Manual PARTS LIST 4. Noise Filter Unit CBM-710/720 Ref. No. Parts No. SW 1 E 4003-495 Power Switch SF-W101A-01BB 1 F 1 E 4005-470 Fuse EAWK-500mA 1 E 4005-475 Fuse 5MF-1A 1 E 4006-220 Fuse Holder UF-0033#01 2 E 4009-270 Noise Filter PLA3021A 1 1,2 3,4 E 2310-010 E 2122-735 Film Capacitor CFX22E104M C. Capacitor DE7100F222MVA1-KC 2 2 3,4 E 2122-725 C.
CBM-710/720 Service Manual FUSE HOLDER POWER SWITCH (MOUNTED ON BACK) FUSE EAWK-500mA : 220-240V 5MF-1A : 100/115V PC BOARD PC710-08 C.
CBM-710/720 Service Manual PARTS LIST 5. Control Board Assy : RS232C CBM-710/720 Ref. No. Parts No.
CBM-710/720 Service Manual PARTS LIST CONTROL BOARD ASSY : RS232C CBM-710/720 Ref. No. Parts No. Description R 1 2 3,40,101 4 5,7,15 32,43 102-104 6 8,17,41 42 9,11,18 19,24-26 31,33-36 38 10 12 13 14 16 20,21 27,28 22,23 29,30 37,39 E 3152-100 E 3272-090 E 3102-041 E 3222-041 E 3332-041 Resistor Resistor Resistor Resistor Resistor 1/4W 1/4W 1/4W 1/4W 1/4W 1.5K 2.7K 1K 2.2K 3.
CBM-710/720 Service Manual PARTS LIST CONTROL BOARD ASSY : RS232C CBM-710/720 Ref. No. Parts No. CP 1,5,8 11,13 E 2110-300 C. Capaciotr DD306-63F104Z12 5 OSC E 501-150 Crystal CSA7.
CBM-710/720 Service Manual Jump Wire Setting : RS232C with Back Up (B) without Back Up (N) Jumper 1 Open C-N Short Jumper 2 C-B Short C-N Short PARTS POSITION : CONTROL BOARD UNIT RS232C 50
CBM-710/720 Service Manual PARTS LIST 6. Control Board Assy : Parallel CBM-710/720 Ref. No. Parts No.
CBM-710/720 Service Manual PARTS LIST CONTROL BOARD ASSY : PARALLEL CBM-710/720 Ref. No. Parts No. R 8,17 9,11,18 19,24-26 31 10 12 13 14 16 20,21 27,28 22,23 29,30 E 3101-041 E 3103-041 Resistor Resistor 1/4W 1/4W 100 J 10K J 2 8 E 3623-041 E 3181-041 E 3683-041 E 3333-041 E 3105-041 E 3223-041 Resistor Resistor Resistor Resistor Resistor Resistor 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 62K 180 68K 33K 1M 22K J J J J J J 1 1 1 1 1 4 E 3472-041 Resistor 1/4W 4.
CBM-710/720 Service Manual PARTS LIST CONTROL BOARD ASSY : PARALLEL CBM-710/720 Ref. No. Parts No.
CBM-710/720 Service Manual Jump Wire Setting : PARALLEL with Back Up (B) without Back Up (N) Jumper 1 Open C-N Short Jumper 2 C-B Short C-N Short PARTS POSITION : CONTROL BOARD UNIT PARALLEL 54
CBM-710/720 Service Manual PARTS LIST 7. Control Board Assy : RS422A CBM-710/720 Ref. No. Parts No.
CBM-710/720 Service Manual PARTS LIST CONTROL BOARD ASSY : RS422A CBM-710/720 Ref. No. Parts No.
CBM-710/720 Service Manual PARTS LIST Control Board Assy : RS422A CBM-710/720 Ref. No. Parts No. OSC 1 E 501-150 Crystal CSA7.
CBM-710/720 Service Manual Jump Wire Setting : RS422A with Back Up (B) without Back Up (N) Jumper 1 Open C-N Short Jumper 2 C-B Short C-N Short PARTS POSITION : CONTROL BOARD UNIT RS422A 58
CBM-710/720 Service Manual PARTS LIST 8. OPERATION PANEL UNIT/PE DETECTOR UNIT/OPERATION PANEL JUNCTION UNIT CBM-710/720 Ref. No. Parts No. Description Q’ty ** OPERATION PANEL UNIT ** D 1,2 3 E 480-250 E 480-260 LED Lamp LED Lamp GL9NG22 GL9PR22 2 1 R 1,2 3 E 3221-041 E 3471-041 Resistor Resistor 1/4W 1/4W 2 1 SW 1,2 E 5102-410 Tact Switch SKH-KAA 2 CA E 4800-960 Cord assy CA 5 1 5 220 J 470 J ** PE DETECTOR UNIT** PH 1 E 4000-520 E 391-090 E 6650-040 P.E.
CBM-710/720 Service Manual LED (GREEN) LED (RED) TACT SWITCH CORD ASSY CA 5 PC BOARD PC710-04 PARTS POSITION : OPERATION PANEL UNIT 60
CBM-710/720 Service Manual PHOTOINTERRUPTER GR2S05 PC BOARD PC710-05 CORD ASSY CA 7 PARTS POSITION : PE DETECTOR UNIT 61
CBM-710/720 Service Manual 5267-07A PC BOARD PC710-06 CORD ASSY CA 5 OP Junction Block 62
CBM-710/720 Service Manual PARTS LIST 9. Auto Cutter AC-2/AC-3 Q’ty Ref. No. 1 2 3 4 5 6 7 8 9 10 10-1 10-2 10-3 10-4 11 12 13 14 15 16 17 18 19 20 21 22 Parts No. Description AC-2 AC-3 E 8010-010 E 8010-020 E 8011-010 S 2.6 x 8 E 8012-010 E 8013-010 E3 E 8014-010 E 8015-010 E 2.
CBM-710/720 Service Manual AC-2 12 3 1 20 6 7 10-2 19 15 6 5 16 4 2 13 10 10-3 10-1 8 11 9 17 14 18 21, 22 6 3 64
CBM-710/720 Service Manual 12 AC-3 3 10-4 1 15 10-2 16 2 13 10-3 10 10-1 8 11 9 17 14 18 21, 22 6 3 12 65
CBM-710/720 Service Manual PARTS LIST 10. Winder AW-2 Ref. No. Parts No.
CBM-710/720 Service Manual AW-2 10 13 12 14 15 9 1 15 6 3 2 8 2-3 2-1 7 2-2 11 16 15 67
