Xerox WorkCentre Pro 423 Service Manual

WorkCentre Pro 423/428 2-142 CHAPTER 2 TROUBLESHOOTING
03/02 How to use the Diagnostic C/E Mode
2.4.8 Self-diagnosis
Self-diagnosis checks inside the machine for a fault.
The basic self-diagnostic operations are as follows:
Auto Diagnosis
The machine is diagnosed about the items registered in the system data. The diagnostic
items can be changed by altering the system data. In CE mode, diagnostic processing
returns to the first item after finishing the last, and continues infinitely. In user mode,
diagnostic processing stops after finishing the last.
Individual diagnosis
Specified items are diagnosed individually. When specifying a diagnostic item, enter its
Chain-Function code from the panel.
Diagnostic result display
Diagnostic results are displayed on the panel at the end of processing. The results can also
be output as a self-diagnostic report.
Operating procedure
Enter Diag. (CE) mode.
 Select LCD buttons in the following order:
“Custom Presets“->“Diag“->“Chain Func“
 Enter the Chain Code.
 Press the Function No. button.
 Enter the Function Code and press the Start Button.
 Self-diagnosis is executed. “No error” is displayed at normal termination or an error code
(D code) at abnormal termination.
System Data for Auto Diagnosis
Label Item
AUTO DIAG SELECT 1 Select auto diagnosis (M/F MAIN PWB/OP-MOT/OM)
Bit7:G/A MSBC Register Read/Write Check
Bit6:DRAM(LM) Add/Data Bus Check
Bit5:DRAM(WN) Add/Data Bus Check
Bit4:DRAM(OM) Add/Data Bus Check
Bit3:DRAM(LM) March Pattern Test
Bit2:DRAM(WN) March Pattern Test
Bit1:DRAM(OM) March Pattern Test
Bit0:OP-MOT Loop Back Test
AUTO DIAG SELECT 2
Select auto diagnosis (MMB)
Bit7:ROM
Bit6: Not used
Bit5:EEPROM
Bit4:SRAM Add/Data Bus Check
Bit3:SRAM March Pattern Test
Bit2:RTC
Bit1: Not used
Bit0: Not used
AUTO DIAG SELECT 3 Select auto diagnosis (VCEM0)
Bit7:BP-F Register Read Test
Bit6:BP-F Register R/W Test
Bit5:BP-F DRAM Address/Data Bus Test
Bit4:BP-F DRAM March Pattern Test
Bit3:BP-F CODEC DMA Test
Bit2:BP-F CODEC CODEC Test
Bit1:BP-F CODEC EXPRED Test
Bit0:BP-F CODEC CLIPPER Test
AUTO DIAG SELECT 4
Select auto diagnosis (G3M0) Bit7:DRAM
Bit6:DPRAM
Bit5:ROM
Bit4:DPMC
Bit3:RCNV, Image RAM
Bit2:MODEM Register, RAM
Bit1:MODEM Loop Back Test
Bit0:EEPROM
AUTO DIAG SELECT 5
Select auto diagnosis (Panel)
Bit7:Panel
Bit6: Not used
Bit5: Not used
Bit4: Not used
Bit3: Not used
Bit2: Not used
Bit1: Not used
Bit0: Not used
AUTO DIAG SELECT 7 Select auto diagnosis(G3M1)

Xerox WorkCentre Pro 423 Specifications

General

Brand	Xerox
Model	WorkCentre Pro 423
Category	All in One Printer
Language	English