Toshiba DP120F, Service Manual

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March 2000 © TOSHIBA TEC 7-63 DP120F/DP125F Circuit Description
• PTC GA Signal Table (3/7)
No. Signal Name Type Functions
85 ADCCSX O A/D converter (IC54) chip select signal (active-low)
Select signal for A/D converter.
86 HTON O Heater on signal (H: On)
Drives the heater tube in the fuser.
88 PTCCK1 I Printer milli-based clock signal
The reference clock for printing in millimeters is in-
put.
90 PTCCK2 I Printer inch-based clock signal
The reference clock for printing in inches is input.
92 PCLVD I PCL print data
The rasterized print data is input from the PCL inter-
face.
93 UFEO I LSU horizontal synchronizing signal
The reference signal for printing position in the scan-
ning direction is input.
94 PMSTS I Polygon motor synchronizing signal
(H: Synchronized)
Indicates the synchronization of the operation of the
polygon motor and the drive clock.
95 VDIN I EET input print data
Print data from the EET(IC39) is input.
96 HSYNC I LSU horizontal synchronizing signal
The reference signal for printing position in the scan-
ning direction is input.
97 DOTCLK O EET Pixel clock
Outputs a pixel-unit clock for driving the EET.
99 OUTCLK O EET Clock
Outputs a clock for driving the EET.
101 LDATA O EET Output print data
Outputs print data to the EET.
102 VDOUT O LSU exposure data
Outputs exposure data for printing to the LSU.
103 VSP O PCL synchronizing signal
Synchronizing signal with GA-1020 (PCL PBA).
104 PMCLK O Polygon motor clock
Drives the polygon motor in the LSU.
I: Input O: Output I/O: Bidirectional