SERVICE MANUAL FACSIMILE GD-1220/1221 File No.
© 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved Under the copyright laws, this manual cannot be reproduced in any form without prior written permission of TOSHIBA TEC CORPORATION. No patent liability is assumed, however, with respect to the use of the information contained herein.
GENERAL PRECAUTIONS REGARDING THE SERVICE FOR e-STUDIO165/167/205/207/237 AND GD-1220/1221 The installation and service should be done by a qualified service technician. 1) Transportation/Installation - When transporting/installing the equipment, remove the drawer, employ two persons and be sure to hold the positions as shown in the figure. The equipment is quite heavy and weighs approximately 32.5 kg (71.65 lb), therefore pay full attention when handling it.
- - - Avoid expose to laser beam during service. This equipment uses a laser diode. Be sure not to expose your eyes to the laser beam. Do not insert reflecting parts or tools such as a screwdriver on the laser beam path. Remove all reflecting metals such as watches, rings, etc. before starting service. Be sure not to touch high-temperature sections such as the exposure lamp, fuser unit, damp heater and areas around them.
CONTENTS GD-1220/1221 1. SPECIFICATIONS AND OUTLINE OF SYSTEM ......................................................... 1-1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 FAX Options ........................................................................................................................ 1-1 Specifications....................................................................................................................... 1-2 Features ......................................................................
GD-1220/1221 CONTENTS © 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2
1. 1.1 SPECIFICATIONS AND OUTLINE OF SYSTEM 1 FAX Options e-STUDIO165/167/205/207/237 can be used as a FAX by installing the FAX unit (GD-1220/1221). Some options can be added when the FAX unit is installed or to extend the FAX functions ( P. 1-9 "1.5 Options"). The external keyboard (GJ-1040) is necessary for the installation of the FAX unit (GD1220/1221). Be sure to use the FAX unit and the equipment only in the following combinations.
1.2 Specifications 1) Main system - Type Desktop type transceiver - Operation Transmission Reception Manual/Automatic Manual/Automatic 2) Scanner [ ]: at rotation transmission - Horizontal direction 16 lines/mm, 8 lines/mm [15.4 lines/mm, 7.7 lines/mm, 3.85 lines/mm] - Vertical direction 15.4 lines/mm, 7.7 lines/mm, 3.85 lines/mm [16 lines/mm, 8 lines/mm] - Combination U-Fine: 16 x 15.4 lines/mm [15.4 x 16 lines/mm] Fine: 8 x 7.7 lines/mm [7.7 x 8 lines/mm] Normal: 8 x 3.
3) Transmission system Circuits to be used: Subscriber line/FAX communication network (G3) - Calling automatic transmission (including the sequential multi-address transmission) - Calling automatic reception (polling reception) - Called automatic transmission (polling transmission) - Called automatic reception - Calling manual transmission - Calling manual reception - Called manual transmission - Called manual reception Communication mode High-speed mode (Toshiba original procedure mode) G3 mode ECM (Error
4) Recording system - Recording method Electrophotographic recording method by LSU (Laser Scanning Unit) - Resolution Horizontal density 16 dots/mm Vertical density 15.4 lines/mm - Recording paper size and the effective printing area Unit: mm (inch) Paper size Dimension (width x length) Printing area A5-R 148 x 210 143 x 204.5 B5-R 182 x 257 177 x 251.5 B5 257 x 182 252 x 176.5 A4-R 210 x 297 205 x 291.5 A4 297 x 210 292 x 204.5 B4 257 x 364 252 x 358.5 A3 297 x 420 292 x 414.
1.3 Features • High-speed scanning The GD-1220/1221 scan one Letter (A4) size Original page in 1.4 seconds (line density 8 dots/mm x 3.85 lines/mm) and stores it into memory. • High-speed transmission The GD-1220/1221 uses a V.34 modem designed for 33,600 bps communications. • Multi-access Using the multi-access facility, multiple processes can be performed in parallel. Functions, such as transmission reservation during reception, copying during memory transmission/ reception, etc.
• Alternate number dialing It is possible to assign two facsimile telephone numbers to one abbreviated dial number or one touch dial key (one as the primary telephone number and the other as an alternate telephone number). The facsimile first dials the primary telephone number, then redials if the line is busy until the redialing limit count is reached. It will then begin to dial the alternate number.
• Substitute reception into memory When there is no paper remaining in the drawer(s), when a recording paper jam occurs, the toner is empty, or printing is already in progress, the received data is stored into memory instead of being output to recording paper. When the trouble is corrected, or the active printing job is completed, the received data in memory will then be printed.
1.4 Accessories and Parts The following accessories and parts come with the FAX unit: Accessory Qty Operator’s manual (for facsimile function): except TW, EU 1 pc. Modular cord (2 m) 1 pc. Unpacking instruction 1 set Parts * Qty Fax unit 1 pc. SG3 label 1 pc. FCC Part 68 label (U.S.A.): NA only 1 pc. IC label (Canada): NA only 1 pc. DTS label (EU): EU only 1 pc. Teleprompt label (New Zealand): AU only 1 pc. Notice to users label (New Zealand): AU only 1 pc. Screw 2 pcs.
1.5 Options Extends the FAX functions when the FAX unit is installed. Option * Function 1 Model Platen Cover Holds originals KA-1640PC Automatic Document Feeder (ADF) Feeds originals MR-2017 Reversing Automatic Document Feeder (RADF) Feeds originals MR-3019 External Keyboard Various dialings GJ-1040 The external keyboard (GJ-1040) is necessary for the installation of the FAX unit (GD-1220/1221).
1.6 System List Platen Cover KA-1640PC Automatic Document Feeder (ADF) MR-2017 Reversing Automatic Document Feeder (RADF) MR-3019 External Keyboard GJ-1040 Fax Kit GD-1220/1221 NA/EU/AU/TW Fig.
1.7 Units and Components 1 Original glass Original scale Scanning area Control panel External keyboard Toner cartridge Power switch Fig. 1-2 Fig. 1-3 Fig.
1.8 Layout of PC Boards FAX NCU Fig.
2. 2.
2.2 Effective recording area 1) Head : 4 mm (0.16 inch) 2) Foot : 4 mm (0.16 inch) 3) Effective Recording Limits: For NAD model [Unit: mm (inch)] Paper size Size (Horizontal x Vertical) Effective recording area LD 279 x 432 (11 x 17) 275 x 424 (10.8 x 16.7) LG 216 x 356 (8.5 x 14) 212 x 348 (8.3 x 13.7) LT 279 x 216 (11 x 8.5) 275 x 208 (10.8 x 8.2) LT-R 216 x 279 (8.5 x 11) 212 x 271 (8.3 x 10.7) ST-R 140 x 216 (5.5 x 8.5) 136 x 208 (5.4 x 8.2) COMP 257 x 356 (10.125 x 14) 253.
For MJD, AUD, ASD, SAD, TWD, and CND models [Unit: mm (inch)] Paper size Size (Horizontal x Vertical) Effective recording range A3 297 x 420 293 x 412 A4 297 x 210 293 x 202 A4-R 210 x 297 206 x 289 A5-R 148 x 210 144 x 202 B4 257 x 364 253 x 356 FOLIO 210 x 330 206 x 322 LT 279 x 216 (11 x 8.5) 275 x 208 (10.8 x 8.2) LT-R 216 x 279 (8.5 x 11) 212 x 271 (8.3 x 10.7) 2 mm (0.08 inch) 2 mm (0.08 inch) 4 mm (0.16 inch) Effective recording area Feed direction 4 mm (0.
2.3 Print mode The machine provides various print modes to meet various requests from users, such as applicable recording paper types, recording methods, etc.
2.4 2.4.1 Recording paper selection algorithm and print algorithm Recording paper selection algorithm Capable of identifying the above-mentioned recording paper size of a received image, this machine prints on the recording paper of the same size as when sent, as a rule. If no recording paper of the identified size is not available, it selects recording paper for printing according to the set mode. The mode is set by using Func. 15 bit 3. 1) Automatic reduction mode (Func.
Reception print flowchart Start Receive FAX Within effective recording area ? YES Full-size print NO NO Fraction discard ON ? YES Within fraction discard length range ? YES Fraction discard print NO Vertical reduction ON ? NO Divided print YES Calculate reduce ratio γ from actual image data γ within max. reduce ratio ? NO YES Vertical reduction print Judgment parameter Effective recording area Area excluding 4 mm from the top of recording paper and 4 mm from the bottom.
[ 1 ] Discard printing Func. 15 bit 2 permits selecting between ON and OFF of the option for discard extra. Func. 15 bit 2 = 0 : OFF Func. 15 bit 2 = 1 : ON (Default) Func. 15 bits 6 and 7 allow the discard parameter to be set. Func.
[ 2 ] Vertical reduction print Func. 15 bit 5 permits selecting between ON and OFF of the option for Vertical reduction print. Func. 15 bit 5 = 0 : OFF Func. 15 bit 5 = 1 : ON (Default) • When the option for Vertical reduction print is ON: When the length of the received document in the feed direction exceeds the effective recording area, the feed length is reduced in an appropriate reduce ratio and then the received document is printed on one sheet of recording paper.
[ 4 ] Similar reduction print When recording paper of the same size as that of the received document is not available due to running out of paper or no paper is available to cover the received document, the received document is similarly reduced and printed on recording paper smaller than the received document. Ex.1 To print A3-size received document on an A4-R sheet because of running out of paper. 2 Similar reduction A B C A B C AA-R A3 Fig.
[ 7 ] RTI When printing a received document with the RTI setting ON, RTI is printed on each page but RTI is printed on the first page only in the case of divided print. (ON or OFF of RTI is possible by means of the user setting. Default: OFF) RTI is created for the LT or A4-R width. When printing RTI on A5, B5 and ST-R smaller than those sheets, the information to be printed is reduced to a printable length. • LT size or up Fig. 2-5 • A5, B5, ST-R Fig.
[ 8 ] Received document and selection of recording paper The procedure for selecting recording paper handled by this machine is briefly described below. Recording paper for reception print is selected according to the print recording paper range and priority as listed in Table 2. A printable print recording paper range is selected according to the scanning width and feed length of the received document.
Table 2 Selection of recording paper For NAD model Recording paper range Priority of recording paper LT-R LT LG COMP LD ST 1 LT-R LT LG COMP LD ST-R *3 2 LT *3 LT-R *3 COMP *2 LD *2 COMP *1 LT-R 3 LG LD LD *2 LT-R *1 LT-R *1 LT *3 4 A4-R LG *2*3 LT-R LT *1*3 LT *1*3 LG 5 A4 *3 A4 LT *3 LG *1 LG *1 A4-R 6 COMP *2 A4-R *3 A4-R A4-R *1 A4-R *1 A4 *3 7 LD *2 COMP*2*3 A4 *3 A4 *1*3 A4 *1*3 COMP *2 8 ST-R *1 ST-R *1*3 ST-R *1 ST-R *1 ST-R *1 LD *2 For
Table 3 Selection of recording paper (Long original) For NAD model Recording paper range LT (long) Priority of recording paper 1 LD COMP (long) *2 LD *2 LD (long) LD 2 COMP *2 COMP COMP *1 3 LT-R LT-R *1 LT-R *1 4 *3 *1*3 *1*3 LT LT LT 5 LG LG *1 LG *1 6 A4-R A4-R *1 A4-R *1 7 A4 *3 A4 *1*3 A4 *1*3 8 ST-R *1 ST-R *1 ST-R *1 2 For MJD, AUD, ASD, SAD, TWD, and CND models Recording paper range A4 (long) Priority of recording paper * * * B4 (long) A3 (long) A3 1 A3
2.5 Error processing If paper has run out or a drawer has been pulled out, follow the procedure described below. 1) If recording paper of a larger size has run out during communication: For DIS redeclaration in the mode change procedure, declare the first recording paper size declared, as it is. 2) If a document has been received with recording paper of a larger size empty: Declare the maximum value of the remaining recording paper or the attached drawer. Conform to the setting of Func. 8 bit 4.
2.6 Limitations on reception print The following limitations are imposed on reception print. 1) Reception print is not performed from the SFB. 2) Even if the ADU is installed, it cannot be used. 3) When illegal paper is selected and printed on due to an operator mistake, the completion of printout is assumed and no printout is performed again. 4) The feed length of a received document is not limited. That is, printing is performed even if the received document has several lines for printing.
GD-1220/1221 LSU-RELATED FUNCTIONS © 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 16
3. DIALING/COMMUNICATION CONTROL 3.1 3.1.1 Circuit Connection and Procedure to Change Mode Dial call-up transmission to a telephone circuit START 3 YES Detecting a calling signal? NO YES Detecting an off-hook signal? NO DC circuit closed After detecting the dial tone, or 3.
3.1.2 Selection of the communication mode This machine has three types of communication mode. The mode to be used is determined according to the combination of the types of the circuits and communication and available function of the other side’s machine. Communication mode Toshiba original procedure ECM G3 { { { Telephone circuit 3.1.
3.2 3.2.1 Signaling System Diagram and Signal Forms Circuit control signals The following circuit control signals are used in the binary and tonal procedures. • Circuit control signals CED Called station identification Indicates that the sender is a FAX machine in the automatic called mode. (*1) CNG Calling tone Indicates that the sender is a FAX machine in the automatic calling mode. (*1) *1: This signal can be sent manually.
3.2.2 Communication with the binary signals In the Toshiba original procedure/G3 modes, communication is performed with the binary procedure as follows.
- Transmission and reception in the ECM mode ECM (Error Correction Mode) conforms to T.30. When an error has occurred to the received image data, the receiving station informs the sending station of the occurrence of the error, and the sending station sends the image data again.
- Cancellation during the transmission If the [CLEAR/STOP] button is pressed during the direct transmission or memory input, the display to confirm the cancellation appears. The communication is finished normally regardless of the presence/absence of the next page or mode changes by pressing the [CLEAR/STOP] button. If the [CLEAR/STOP] button is pressed anytime except during the transmission of the image data, DCN is forcibly sent to terminate the communication.
2) Binary signals NSF Non-Standard Facility Informs that the receiving station (machine) has a non-standard facility. NSC Non-Standard Facility Command Command to transmit using the non-standard facility which is selected corresponding to NSF (i.e., Polling etc.). NSS Non-Standard Facility Setup Command to transmit using the non-standard facility which is selected corresponding to NSF or NSC. CSI Called Subscriber Identification Provides the telephone number of the called station.
PIP Procedure Interrupt Positive Informs that the image signals have been received correctly and requests the operator’s reply by telephone or to return to the beginning of the phase B to continue the communication (i.e., CALL Request, etc.). PIN Procedure Interrupt Negative Informs that the image signals have not been received correctly and requests for operator’s reply by telephone or to return to the beginning of the phase B to continue the communication.
3) Frame structure of binary signals Each binary signal frame is comprised of the following sequence and fields. However, some binary signals do not have the FIF field inserted. F F A C FCF FIF FCS F Preample F : Flag sequence Indicates the start or end of a frame. Also establishes the frame synchronization. A : Address field Informs the address. C : Control field Informs if this frame is the last one in this procedure. 3 FCF: FAX control field Informs the type of the binary signal.
- FCF format of each binary signal Binary signal Format b1 b2 b3 b4 b5 b6 b7 b8 NSF 0 0 0 0 0 1 0 0 NSC 1 0 0 0 0 1 0 0 NSS x 1 0 0 0 1 0 0 CSI 0 0 0 0 0 0 1 0 CIG 1 0 0 0 0 0 1 0 TSI x 1 0 0 0 0 1 0 DIS 0 0 0 0 0 0 0 1 DTC 1 0 0 0 0 0 0 1 DCS x 1 0 0 0 0 0 1 SUB x 1 0 0 0 0 1 1 SEP 1 0 0 0 0 1 0 1 PWD(Rx) 1 0 0 0 0 0 1 1 PWD(Tx) x 1 0 0 0 1 0 1 CFR x 0 1 0 0 0 0 1 FTT x
4) Training The training is performed in the binary procedure to surely transmit the image signals. - Training signal The training signal is transmitted following the DCS signal at the modem speed specified by the DCS signal. Responding to this training signal, the receiving side adjusts the auto-equalizer. - Format of the training signal 14.
3.2.3 V.8/V.34 communication sequence 1) Outline - V.8 is performed as a startup procedure to switch to V.34. V.8 can connect an existing facsimile machine to the equipment using a data modem or other V-series modems. The V.34 modem has a modem circuit previously recommended, allowing it to be also connected to the existing modems while they are upper compatible. - New technologies such as the pre-emphasis technology *1 and the probing technology *2 are fully used.
2) Standard procedure Transmitter Receiver Line closed Network interaction (Phase 1) ( P3-14) The available modulation mode is in formed. Each declares that it has V.34 capability. The procedure moves to V.34 in the phase 2. After the information about the modem capability is exchanged, the receiver determines the modulation speed based on the result of reception of the probing signal which was sent by the transmitter.
- Network interaction (Phase 1) The V.8 procedure is performed as the startup procedure for the V.34 high-speed modem. In the V.8 procedure, mainly the optimum modulation method (V series modem mode) that can be operated between the transmitter and receiver is determined. Transmitter Signal name Abbreviation Function Remarks Calling tone CNG 1100 Hz tone signal specified by T.30 indicating the sender is a FAX machine in the automatic calling mode.
- Probing/Ranging (Phase 2) Examines the line characteristics and sets the parameters for the modulation related items such as the modulating speed. Transmitter Signal name Abbreviation Function INFO sequence INFO0c Informs the modem capability such as modulating speed and frequency transmission capability (two frequency bands (high and low) used to examine the line characteristics), and requests for adjusting.
- Equalizer and echo canceller training (Phase 3) Training (adjustment) is performed according to the parameters set in the phase 2 to optimize the filters such as an equalizer. Transmitter - Signal name Abbreviation Function S signal S S signal S PP signal PP Used by the modem of the receiver to train the equalizer. TRN signal TRN Used by the receiver to determine the transmission rate. Short training Remarks S is a signal made as the result of phase transition of S.
- Control channel The conventional T.30 procedure is performed. The transmission rate is 1200 bps. Transmitter Signal name Abbreviation Function Flag flags Maintains the synchronization. Non-standard facilities setting NSS Receives an NSF sent from the receiver. It selects the available mode from the received NSF, and specifies the mode for the reception. Transmitting Subscriber ID TSI Informs the telephone number of the transmitter.
- Primary channel The training is performed according to the parameters set in the phase 4. The transmission rate is 1,200 bps. Transmitter - Signal name Abbreviation Function S signal S S signal S PP signal PP Used by the modem of the receiver to train the equalizer.
- Communication end procedure This procedure is to terminate the communication. The transmission rate is 1,200 bps. Transmitter Signal name Abbreviation Function Sh signal Sh Sh signal Sh ALT signal ALT - E sequence E - End of procedure signal PPS-EOP The transmission of one page is completed. Flag flags Maintains the synchronization. Disconnection signal DCN Informs to disconnect the line.
3) Example of protocol The signals shaded in the following figure are the most important signals in the procedure. - Late start The receiver cannot detect CM signal while it is sending the ANSam signal. Therefore, it sends a DIS signal to inform the availability of V.8 support. The transmitter sends a CI signal that causes the receiver to send another ANSam signal which makes the receiver move to the V.8 procedure.
- Multi-page sequence In the same manner as the T.30 procedure, the transmitter sends a PPS-MPS signal after sending the image data. The receiver sends an MCF signal and moves to the next page transmission.
- Mode change The transmitter and receiver send a PPS-EOM signal and an MCF signal respectively. Then the receiver and transmitter send a DIS signal and a DCS signal respectively to change the mode.
- Change of the image transmission speed by the receiver The receiver sends a PPh signal responding to an Sh signal sent from the transmitter. Then, the image transmission speed is determined according to the MPh sequence sent from the both modems.
- Change of the image transmission speed by the transmitter The transmitter sends a PPh signal after sending the image data. The receiver returns a PPh signal. Then, the image transmission speed is determined according to the MPh sequence sent from the both modems.
3.3 3.3.1 FAX Automatic Switching General functions There are two types of setting for the FAX Auto-Switching Mode Selection: TEL Mode and FAX Mode. 3.3.2 TEL mode This mode is selected to prioritize telephone communication when the frequency of the fax reception is low. When the TEL mode is selected, the automatic FAX reception function does not work. Therefore, when a calling signal comes from the exchange, the telephone ringer continues ringing until the operator picks up the handset.
GD-1220/1221 DIALING/COMMUNICATION CONTROL © 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved 3 - 26
4. 4.1 ELECTRICAL CIRCUITS Configuration GD-1220/1221 FAX board Speaker V.34 MODEM Analog SW 4 NCU board MAIN board SoC ASIC Fig.
4.2 Description of Circuits 4.2.1 Configuration This section describes the function of each circuit. The NCU board consists of the transformer, relay, analog switch and other peripheral devices. It controls switching of the line path, generates the dial pulses, detects the line current and ring signal, and monitors the line.
EU/AU/AS/C models NCU board REVA REVB Line current detection circuit CML LD IC5 Line CN3 La External telephone 1 0 a2 1 0 IC6 T1 TXOUT Analog switch RLY4 Relay RLY3 CML relay ATT3DB IC6 IC3 CN4 Lb Dial pulse generation circuit FAX board IC4 AG RXIN Analog switch b2 IC4 ~ DB1 + - ~ CNG signal detection circuit ANSDET RLADJ1 RLADJ2 DC consumption circuit Ring signal detection circuit CI Fig.
4.2.
EU/AU/AS/C models NCU board Line current detection circuit 4 Lb R26 4 Line CN3 3 La External telephone 9 C7 1 5 0 3 1 8 RLY4 0 10 Relay 2 2 a2 R31 3 13 144 22 29 142 IC23 141 63 140 29 63 ASIC 0 R29 14 1 C13 15 2 R36 16 3 1 IC6 2 3 C12 IC3 11 10 11 10 1 R32 5 b2 Analog switch R30 R11 C14 5 IC6 7 1 1 2 0 13 1 12 IC7 Q9 Ring signal detection circuit 8 AG +12V 4 8 21 22 Analog switch R28 T1 7 21 CN5 IC5 AG 12 6 7 CN4 1 6 MAIN bo
4.2.3 Dial pulse generation circuit NA/TW models NCU board C5 FAX board R4 MAIN board RLY2 +12V CML relay 1 Lb 1 0 9 Q51 8 10 3 3 CML1 27 27 144 AG ~ 3 - + +5V ~ 4 IC23 CN5 1 0 4 CN5 La CN262 3 DB1 CN9 Line CN10 4 12 ASIC 1 External telephone CN11 PC1 3 a2 4 b2 3 2 Q53 4 4 LD1 61 61 143 SG Ring signal detection circuit Fig.
EU/AU/AS/C models FAX board NCU board MAIN board RLY3 +12V CML relay 5 3 6 1 AG IC1 Line CN3 3 La External telephone 9 1 0 8 10 4 2 4 Q6 2 a2 3 CML1 27 27 144 4 LD1 61 IC23 CN5 1 0 3 CN5 4 Q4 +5V CN262 4 Lb 12 CN4 1 ASIC 61 143 SG 5 b2 T1 Line path switching circuit AG Ring signal detection circuit 4 Fig. 4-7 The dial pulse generation circuit consists of the photocoupler (IC1), the ASIC (IC23) on the MAIN board and the other peripheral devices.
4.2.4 Line current detection circuit NA/TW models NCU board FAX board R87 19 19 REVA1 66 66 160 8 6 20 20 IC23 CN5 3 C7 CN5 7 CN9 PC3 2 CN262 1 MAIN board REVB1 33 ASIC 33 161 Line CN10 PC3 4 Lb 4 R86 5 SG Fig. 4-8 The line current detection circuit consists of the photocoupler (PC3), ASIC (IC23) on the MAIN board and the other peripheral devices. It detects a dial tone and the hook status of the external telephone from the current flowing through the line.
EU/AU/AS/C models NCU board FAX board 1 8 19 19 MAIN board REVA1 66 66 160 Line CN3 4 R26 Lb 2 7 20 20 REVB1 33 IC23 CN5 CN5 CN262 Line current detection IC CN4 IC2 ASIC 33 161 Fig. 4-9 The line current detection circuit consists of the line current detection IC (IC2), ASIC (IC23) on the MAIN board, and the other peripheral devices. It detects a dial tone and the hook status of the external telephone from the current flowing through the line.
4.2.5 CI detection circuit NA/TW models FAX board NCU board 10 3 La 1 0 4 5VPS AG ZD1 ZD3 C1 R2 R79 17 3 D52 1 3 CML1 27 27 17 CI1 144 IC23 CN5 1 0 9 3 Q51 CN5 CN10 Line Lb 12 CN9 1 4 MAIN board RLY2 CML relay CN262 +12V ASIC 65 65 162 4 PC2 2 3 SG Fig. 4-10 The CI detection circuit consists of the photocoupler (PC2), ASIC (IC23) on the MAIN board and the other peripheral devices to detect a ring signal input from the telephone line.
EU/AU/AS/C models NCU board FAX board MAIN board RLY3 +12V CML relay AG 3 C8 3 La 9 1 0 R4 ZD2 5VPS ZD3 27 27 144 IC23 CN5 1 0 CML1 CN5 4 CN3 Line Lb 3 3 Q4 CN262 4 12 CN4 1 ASIC 10 D2 1 R34 4 17 PC1 2 17 CI1 65 65 162 3 Q5 R35 SG Fig. 4-11 The CI detection circuit consists of the photocoupler (PC1), ASIC (IC23) on the MAIN board and other peripheral devices to detect a ring signal input from the telephone line.
4.2.
EU/AU/AS/C models FAX board NCU board 28,29 [25,26] IC2 32 [29] RLY3 CML relay MODEM IC6 4 1 0 5 T1 1 2 1 1 TXOUT1 2 RXIN1 MAIN board 9 +12V 1 1 0 8 Analog switch IC6 AG 5 12 7 R11 1 2 6 1 0 15 13 1 0 14 11 IC4 7 2 6 3 25 25 A5 IC53 SoC Analog switch 13 [4] 15 10 R273 [R31] 14 [2] Q4 R272 [R30] 15 [5] AG R271 [R29] 12 [1] IC10 1 [12] Analog switch 5 [15] 2 [14] Speaker IC10 CN264 RING [SPKCLK] IC9 6 3 SP+ SP- 12 [2] 3 1 2 5 3 SG 3 4 [13] 11 10
The monitoring signal selected by IC9 is input to the analog switch (IC10) to select the output sound volume. The sound volume is selected by switching IC10 according to the SPVOL0-2 signals output from the ASIC and selecting an input resistance for the monitoring signal. The relation between the signals and sound volume is as follows. Sound volume SPVOL2 SPVOL1 SPVOL0 Max. (7) LOW LOW LOW (6) LOW LOW HIGH (5) LOW HIGH LOW (4) LOW HIGH HIGH (3) HIGH LOW LOW (2) HIGH LOW HIGH Min.
4.3 PC Boards 1) PWA-F-FAX-635 (GD-1220) 4 Fig.
2) PWA-F-FAX-678 (GD-1221) Fig. 4-15 3) PWA-F-NCU-631 (NAD, TWD, SAD) Fig.
4) PWA-F-NCU-631 (MJD, AUD, ASD, CND) 4 Fig.
GD-1220/1221 ELECTRICAL CIRCUITS © 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 18
5. INSTALLATION 5.1 Explanation to the Users After installing the FAX unit, explain the following items to the user using the Operator’s Manual. With the underlined items, actually demonstrate the operation. Items to be explained • Switches and control panel - Summary of the control panel (FAX functions) - After power is turned OFF, image data are kept in HDD.
GD-1220/1221 INSTALLATION © 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved 5-2
