Toshiba GD-1220, GD-1221 service manual RLY3, IC3, IC5

Page 65

EU/AU/AS/C models

NCU board

Line current

detection

circuit

 

FAX board

 

 

 

MAIN board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q4

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

+12V

RLY3

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CML relay

 

 

 

 

 

 

IC5

 

 

 

 

 

 

7

 

 

 

 

1

 

12

 

AG

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C7

 

R28

 

 

Analog switch

 

 

 

 

 

 

 

 

 

 

 

 

1

5

T1

 

13

0

 

 

 

 

 

 

 

 

 

 

R26

 

 

 

 

 

 

 

 

 

 

 

4

Lb

4

 

 

 

 

 

 

 

 

 

 

 

 

0

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R29

14

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IC6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line

 

 

 

 

 

 

RLY4

 

 

C13

 

3

 

1

2

 

 

 

 

 

 

 

 

1

8

 

 

15

2

 

 

 

 

 

 

 

 

3

La

 

9

0

10

 

 

 

 

 

 

 

 

 

 

 

 

CN4

CN3

 

 

 

 

Relay

 

R31

R36

16

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

a2

 

 

 

2

3

 

AG

 

 

 

 

 

 

 

 

 

External

 

 

 

 

 

+12V

 

 

 

C12

 

11 10

 

 

IC3

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

telephone

 

 

 

 

 

4

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R32

R30

 

 

 

Analog

 

 

 

 

5

b2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C14

 

R11

1

1

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

2

0

 

15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IC6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

7

13

1

 

 

 

IC4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

6

7

 

 

 

 

 

 

 

 

 

 

 

 

 

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IC7

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q9

4

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ring signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

detection

 

AG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 4-5

 

 

 

 

 

 

 

3

 

CML1

21

 

6

 

ATT3DB1

22

CN5

7

 

RLADJ11

29

8

 

RLADJ21

63

 

CN262

 

 

 

 

 

 

28,29

 

 

1

TXOUT1 [25,26]

 

 

 

 

 

IC12

 

 

 

 

[IC2]

 

 

 

32

 

 

2

RXIN1

[29] MODEM

 

CN5

21144

22142 IC23

29141

63140 ASIC

The line path switching control circuit consists of the CML relay (RLY3) and analog switch (IC3, IC5) on the NCU board, the ASIC (IC23) on the MAIN board, and the other peripheral devices. It changes the path for the FAX send/receive signals and connects it to each control circuit.

The CML relay is switched according to the CML1 signal output from the ASIC on the MAIN board. When the CML1 signal goes HIGH, Q4 comes on to turn ON the CML relay.

The analog switch (IC3) is switched according to the CML1 signal and ATT3DB1 signal. When the CML1 signal or ATT3DB1 signal goes HIGH, the analog switch is turned ON.

The analog switch (IC5) is switched according to the RLADJ11 and RLADJ12 signals.

The analog switch is switched according to the states of the RLADJ11 and RLADJ21 signals. Turning ON the CML relay and analog switch allow the MODEM to be connected to the line.

Signal Name

Type

Active

 

Description

Destination

 

 

 

 

 

 

CML1

O

H

Line 1

CML Relay Control Signal

RLY3, IC3

 

 

 

 

 

 

ATT3DB1

O

H

Line 1

Attenuator Control Signal

IC3

 

 

 

 

 

 

RLADJ11, 21

O

H

Line 1

Return Loss Adjustment Signal

IC5

 

 

 

 

 

 

*Values in [ ] are GD-1221 in case that the descriptions vary between GD-1220 and GD-1221.

© 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved

GD-1220/1221

 

ELECTRICAL CIRCUITS

4 - 5

08/08

Page 64 Page 66
Image 65
Page 64 Page 66
Contents GD-1220/1221 Page Transportation/Installation Vorsicht Important Service Parts for SafetyContents 2006 2008 Toshiba TEC Corporation All rights reserved GD-1220 GD-1221 Remarks FAX OptionsSTUDIO165/205 Available STUDIO167/207/237 System firmware versionSpecifications Transmission system DBm to -8 dBm The setting can be changed by 1 dBEmbedded DBm to 0 dBm Level -55 dBm or lower cannot be detectedComp Dimension width x length Printing areaFolio Features Specifications and Outline of System 08/08 Accessory Qty Accessories and PartsFollowing accessories and parts come with the FAX unit Option Function Model Extends the FAX functions when the FAX unit is installedOptions ADF Radf System ListNA/EU/AU/TW Units and Components Layout of PC Boards Symbol Name FunctionFAX PWA-F-NCU-631Recording paper size LSU-RELATED FunctionsSize Horizontal x Vertical Effective recording area Effective recording areaInch Feed direction Mm 0.16 inch Effective recording area For MJD, AUD, ASD, SAD, TWD, and CND models Unit mm inchSize Horizontal x Vertical Effective recording range 297 x 293 x A4-R 210 x 206 x A5-R 148 x 144 x 257 x 253 xPrint mode Print algorithm Recording paper selection algorithm and print algorithmRecording paper selection algorithm Judgment parameter Reception print flowchart Start Receive FAXBit Discard parameter Discard printingVertical reduction print Similar reduction print RTI Scanning For MJD, AUD, ASD, SAD, TWD, CND modelsST-R Comp Scanning widthRecording paper range A4-R For MJD, AUD, ASD, SAD, TWD, and CND modelsRecording paper range Comp *2 Comp *1 Recording paper range LT long Comp long LD longRecording paper range A4 long B4 long A3 long Folio Folio *1Error processing Order Drawer Limitations on reception printLSU-RELATED Functions Dial call-up transmission to a telephone circuit Circuit Connection and Procedure to Change ModeYES Standby stateProcedure to select the transmission mode Selection of the communication modeCommunication mode Toshiba original procedure Telephone circuitCircuit control signals Signaling System Diagram and Signal FormsThis signal can be sent manually Signal form Signal name Signal formImage signal Communication with the binary signalsMode change is possible only for the original set manually ReceiverFrames received Error occurred Only error frame retransmitted 1 completed 2 completedMCF CED NsfcsidisCFR Binary signals PIN PIPPRI-EOM PRI-MPSFormat When this frame is the last frame, X =FCF FIF FCS Binary signal Format FCF format of each binary signalTCF 9600 bps, 7200 bps4800 bps, 2400 bps 3 V.8/V.34 communication sequence Line closed Standard procedure Transmitter ReceiverSignal name Abbreviation Function Remarks Hz and 3,750 Hz in units Tone signal between150 Hz Frequency transmission CapabilityALT TRNReceives an NSF sent from Maintains the synchroniza 7E H TionTransmitter ReceiverScrambled data frame to be Image data Image data are sent. TransmitterIs completed Encoded image data Turn off Scrambled 1 is sent forPPS-EOP Short training SignalTransmission of one Is completed Informs to disconnect the lineLine closed DIS cannot be recognized DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control TEL mode FAX Automatic SwitchingFAX mode General functionsDIALING/COMMUNICATION Control GD-1220/1221 ConfigurationDescription of Circuits ConfigurationEU/AU/AS/C models Signal Name Type Active Description Destination Line path switching control circuitCML1 ATT3DB1IC5 RLY3, IC3IC3 Dial pulse generation circuit Line 1 Dial Pulse Generation Signal Q53Line 1 Dial Pulse Generation Signal Line Reverse Current Detection Signal IC23 Line Current Detection Signal IC23Line current detection circuit REVA1Current Reverse Line 1 Current Detection IC23 Signal Line 1 Current Detection Signal IC23CI detection circuit Line 1 CI Detect Signal IC23Line 1 CI Detection Signal IC23 FAX board Line monitor circuitRinger/Alarm Monitoring signalLine Monitor LOW HighSound volume PWA-F-FAX-635 GD-1220 PC BoardsPWA-F-FAX-678 GD-1221 PWA-F-NCU-631 NAD, TWD, SAD PWA-F-NCU-631 MJD, AUD, ASD, CND Electrical Circuits Explanation to the Users InstallationInstallation
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