Scanner Test Mode - Ricoh B202 Service Manual

SCANNER TEST MODE

4.2 SCANNER TEST MODE
4.2.1 VPU TEST MODE
Output the VPU test pattern with SP4-907 to make sure the scanner VPU control
operates correctly. The VPU test pattern prints out after you have set the SP mode
settings and pressed the start key.
SP4-907-1 VPU Test Pattern: R
SP4-907-2 VPU Test Pattern: G
SP4-907-3 VPU Test Pattern: B
• The CCD on the SBU board may be defective if the copy is abnormal and the
VPU test pattern is normal.
• The following can be the cause if the copy is normal and the VPU test pattern is
abnormal:
• The harness may not be correctly connected between the SBU and the IPU
• The IPU or SBU board may be defective.
4.2.2 IPU TEST MODE
You can check the IPU board with the SP mode menu, SP4-904-1 or 2.
If no error is detected, the test ends. Then the completion code shows in the
operation panel display. If an error is detected, the test is interrupted. Then an error
code shows. The table below lists the completion and error codes.
SP4-904-1 Register Access
There are 16 bits switches in this SP. Each bit indicates each CPU as followings.
The error result is displayed on the operation panel in decimal number.
0: Normal 1: Error
•
Bit 0: ASIC0 image register
Bit 1: ASIC0 serial register
Bit 2: ASIC1 register
Bit 3: ASIC1 register
Bit 4: ASIC1 register
SP4-904-2 Image Path
There are 16 bits switches in this SP. Each bit indicates each CPU path as
followings. The error result is displayed on the operation panel in decimal number.
0: Normal 1: Error
•
Bit 0: ASIC1 to ASIC3
Bit 1: ASIC0 to ASIC1
Bit 2: ASIC0 to ASIC1
Bit 3: ASIC1 to ASIC2
Bit 4: ASIC3 to ASIC1
B202/B178/B180/
Bit 5: ASIC3 register
Bit 6: ASIC2 register
Bit 7: ASIC4 (MC) register
Bit 8: ASIC4 (YK) register
Bit 9 to 15: Not used
Bit 5: ASIC 3 to ASIC 1
Bit 6: ASIC2 to ASIC4 (MC)
Bit 7: ASIC2 to ASIC4 (YK)
Bit 8 to 15: Not used
4-8 SM