Manuals / Toshiba / Computer Equipment / Fax Machine

Toshiba GD-1220 Transmission system, Embedded, DBm to -8 dBm The setting can be changed by 1 dB

Models: GD-1220 GD-1221

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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 Correction Mode)

Circuit carrier link equalization function

Embedded

Output level

–16 dBm to –8 dBm (The setting can be changed by “1 dB”.)

Input level

–43 dBm to 0 dBm

(Level –55 dBm or lower cannot be detected)

Specifications of the communication mode

	High-speed mode	G3 mode	ECM
	(Toshiba original procedure mode)	G3 mode	ECM
	(Toshiba original procedure mode)

Horizontal scanning den-	8 dots/mm	Same as on the left	Same as on the left
sity	16 dots/mm

Vertical scanning density	3.85 lines/mm	Same as on the left	Same as on the left
	7.7 lines/mm
	15.4 lines/mm

Encoding system	MH/MR/MMR/JBIG	MH/MR	MH/MR/MMR/JBIG

Transmission speed	14.4 k/12 k/9600	Same as on the left	33.6 k/31.2 k/28.8 k/
(image signal) and modu-	7200/4800/2400 bps		26.4 k/24 k/21.6 k/
lation method	Conformance to V.17/V.29/V.27 ter		19.2 k/16.8 k/14.4 k/
			12 k/9600/7200/
			4800/2400 bps

Control signal	300 bps	Same as on the left	1200 bps (V.34)
	(V.21)		300 bps (V.21)

Procedure to control the	Toshiba original procedure	T.30 conformance	Same as on the left
transmission

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© 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved	GD-1220/1221
	SPECIFICATIONS AND OUTLINE OF SYSTEM

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Toshiba GD-1220, GD-1221 service manual Transmission system, Embedded, DBm to -8 dBm The setting can be changed by 1 dB

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 detectedDimension width x length Printing area FolioComp Features Specifications and Outline of System 08/08 Accessories and Parts Following accessories and parts come with the FAX unitAccessory Qty Extends the FAX functions when the FAX unit is installed OptionsOption Function Model System List NA/EU/AU/TWADF Radf 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 Recording paper selection algorithm and print algorithm Recording paper selection algorithmPrint 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 widthFor MJD, AUD, ASD, SAD, TWD, and CND models Recording paper rangeRecording paper range A4-R 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 completedCED Nsfcsidis CFRMCF Binary signals PIN PIPPRI-EOM PRI-MPSWhen this frame is the last frame, X = FCF FIF FCSFormat Binary signal Format FCF format of each binary signal9600 bps, 7200 bps 4800 bps, 2400 bpsTCF 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 ATT3DB1RLY3, IC3 IC3IC5 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