Line 1 Dial Pulse Generation Signal | Toshiba GD-1220, GD-1221

EU/AU/AS/C models

NCU board

+12V RLY3

CML relay

	FAX board						MAIN board

112

+5V

Q4

3

3 CML1 27

27 144

4 Lb 4

1 5

0 3

6 1

AG

IC23

Line

External telephone

CN3

3 La	1	8
3 La	9	10
	0	10

2a2

5b2

IC1

42

Q6

SG

T1

AG

Ring signal

detection

circuit

4

Line path switching circuit

CN4

CN262

4 LD1 61

CN5

CN5

61 143

ASIC

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. It generates the dial pulses in the FAX transmission and dialing to the outside.

The ASIC makes the CML1 signal become HIGH to connect the line to the MODEM side. To generate the dial pulses, the ASIC makes the LD1 signal become HIGH to turn ON Q6. This allows the photocou- pler to come on and the current flows through the line for sending a dial attempt.

Signal Name	Type	Active	Description	Destination

LD1	O	H	Line 1 Dial Pulse Generation Signal	Q6

© 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved	GD-1220/1221
	ELECTRICAL CIRCUITS

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Image 67

Toshiba GD-1220, GD-1221 service manual Line 1 Dial Pulse Generation Signal

Contents

GD-1220/1221 Page Transportation/Installation Vorsicht Important Service Parts for Safety Contents 2006 2008 Toshiba TEC Corporation All rights reserved System firmware version FAX OptionsGD-1220 GD-1221 Remarks STUDIO165/205 Available STUDIO167/207/237 Specifications DBm to 0 dBm Level -55 dBm or lower cannot be detected DBm to -8 dBm The setting can be changed by 1 dBTransmission system Embedded Folio Dimension width x length Printing areaComp Features Specifications and Outline of System 08/08 Following accessories and parts come with the FAX unit Accessories and PartsAccessory Qty Options Extends the FAX functions when the FAX unit is installedOption Function Model NA/EU/AU/TW System ListADF Radf Units and Components PWA-F-NCU-631 Symbol Name FunctionLayout of PC Boards FAX Recording paper size LSU-RELATED Functions Size Horizontal x Vertical Effective recording area Effective recording area 297 x 293 x A4-R 210 x 206 x A5-R 148 x 144 x 257 x 253 x For MJD, AUD, ASD, SAD, TWD, and CND models Unit mm inchInch Feed direction Mm 0.16 inch Effective recording area Size Horizontal x Vertical Effective recording range Print mode Recording paper selection algorithm Recording paper selection algorithm and print algorithmPrint algorithm Judgment parameter Reception print flowchart Start Receive FAX Bit Discard parameter Discard printing Vertical reduction print Similar reduction print RTI Scanning width For MJD, AUD, ASD, SAD, TWD, CND modelsScanning ST-R Comp Recording paper range For MJD, AUD, ASD, SAD, TWD, and CND modelsRecording paper range A4-R Folio Folio *1 Recording paper range LT long Comp long LD longComp *2 Comp *1 Recording paper range A4 long B4 long A3 long Error processing Order Drawer Limitations on reception print LSU-RELATED Functions Standby state Circuit Connection and Procedure to Change ModeDial call-up transmission to a telephone circuit YES Telephone circuit Selection of the communication modeProcedure to select the transmission mode Communication mode Toshiba original procedure Signal name Signal form Signaling System Diagram and Signal FormsCircuit control signals This signal can be sent manually Signal form Receiver Communication with the binary signalsImage signal Mode change is possible only for the original set manually Frames received Error occurred Only error frame retransmitted 1 completed 2 completed CFR CED NsfcsidisMCF Binary signals PRI-MPS PIPPIN PRI-EOM FCF FIF FCS When this frame is the last frame, X =Format Binary signal Format FCF format of each binary signal 4800 bps, 2400 bps 9600 bps, 7200 bpsTCF 3 V.8/V.34 communication sequence Line closed Standard procedure Transmitter Receiver Signal name Abbreviation Function Remarks Frequency transmission Capability Tone signal betweenHz and 3,750 Hz in units 150 Hz ALT TRN Receiver Maintains the synchroniza 7E H TionReceives an NSF sent from Transmitter Encoded image data Turn off Scrambled 1 is sent for Image data Image data are sent. TransmitterScrambled data frame to be Is completed Informs to disconnect the line Short training SignalPPS-EOP Transmission of one Is completed Line closed DIS cannot be recognized DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control General functions FAX Automatic SwitchingTEL mode FAX mode DIALING/COMMUNICATION Control GD-1220/1221 Configuration Description of Circuits Configuration EU/AU/AS/C models ATT3DB1 Line path switching control circuitSignal Name Type Active Description Destination CML1 IC3 RLY3, IC3IC5 Dial pulse generation circuit Line 1 Dial Pulse Generation Signal Q53 Line 1 Dial Pulse Generation Signal REVA1 Line Current Detection Signal IC23Line Reverse Current Detection Signal IC23 Line current detection circuit Current Reverse Line 1 Current Detection IC23 Signal Line 1 Current Detection Signal IC23 CI detection circuit Line 1 CI Detect Signal IC23 Line 1 CI Detection Signal IC23 FAX board Line monitor circuit LOW High Monitoring signalRinger/Alarm Line Monitor Sound volume PWA-F-FAX-635 GD-1220 PC Boards PWA-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 Installation Installation