Xerox DocuPrint C55 Service Manual page 278

A B
ESS IF PWB PL 3.1
ESS PWB PL 3.2
1
Power On Self Test (POST) (C55/ C55mp)
1. ROM CHECK SUM.
2. NVM TEST.
3. DRAM TEST.
4. TIFF PWB TEST.
5. LOCAL SERIAL (SLIC) PWB TESTED.
6. FONT SIMM CHECKSUM
7. NETWORK INTERFACE CARD TESTED.
8. FLOPPY TEST.
2
9 HARD DISK TEST.
10. ESS PWB COMMUNICATES WITH PCU PWB.
Power On Self Test (POST) [NC60]
1. POWER AND FAIL LEDS ON.
2. FAIL LED OFF.
3 BOOT 1 SEQUENCE BEGINS.
- INITIALIZE I960 CPU.
3 - BASE RAM CHECK (32 MB).
- ROM CHECK.
- ASIC & DMA CONTROLLER CHECK.
- PARALLEL AND SERIAL PORT CHECK.
- MESSAGE DISPLAY INDICATES:
- POWER ON VERSION n.nn
- MESSAGE DISPLAY OFF.
- ALL LED'S ON, ALL PIXELS ON.
4. BOOT 2 SEQUENCE BEGINS.
- * DISPLAYED AS TESTS ARE CONDUCTED.
- HARD DISK TEST.
4
- SIMM 1 THROUGH SIMM 4 TEST.
- XIE RAM TEST.
- OPTIONAL NIC CARD SLOT TEST.
- 10MB ETHERNET TEST (INTERNAL NIC).
- OPTION FLASH ROM TEST.
- FLOPPY TEST.
- DP-TEK TEST.
- MEMORY TEST.
- ESS READY.
5
ESS PWB
6
7
BSDs
Chain 3 Run Control
C D E
LVPS PWB
PL 3.1
CN703
CR1
7
CR2
CR3
1
CR4
C55/
C55mp
CN104
CR5
CMD
POWER
5
C READY
7
STATUS
POWER
9
S READY
2
11
FAIL
READY
NC60
12
(C55/C55mp)
1
CR5 LITES WHEN THERE IS +5 VDC AVAILABLE ON THE ESS.
CR3 LITES WHEN THE ESS PASSES SELF TEST.
LVPS
ALL LEDS LIGHT WHEN THE ESS FAILS SELF TEST.
2
[NC60]
THE POWER LED LITES WHEN THERE IS +5 VDC AVAILABLE ON THE ESS.
THE FAIL LED LITES IF THE ESS FAILS SELF TEST.
PCU PWB
2/99
7-4
F G
PCU PWB
PL 4.2
CN107
21
Power On Self Test (POST)
1. ROM CHECK SUM.
2. RAM CHECK SUM.
CN104
2 3. NVM CHECK SUM
4. ALL SENSORS CHECKED FOR PAPER.
6
5. MAIN MOTOR ON.
1
6. PROCESS CONTROL SETUP BEGINS.
5
7. DURING ESS BOOT [NC60 BOOT 1],
7
MESSAGE DISPLAY INDICATES CCW
MOVING *.
8. ESS BOOT [NC60 BOOT 1], COMPLETE,
MESSAGE DISPLAY SELF TEST.
LEDS ON,)
9. INITIALIZING MESSAGE DISPLAYED.
10. ESS SELF TEST COMPLETE MESSAGE
DISPLAY INDICATES STATUS
PROCESS CONTROL SETUP.
11. IF THE ESS FAILS TO COMMUNICATE
WITH THE MESSAGE DISPLAY, A U3
STATUS CODE IS DISPLAYED.
H J
MESSAGE DISPLAY
U0
U1
U2
(ALL
OF
MESSAGE DISPLAY
U3
Status
Description
Codes
U0 PCU ROM check sum failure.
U1 PCU RAM check sum failure.
NVM RAM check sum failure.
U2
U3 Communication failure.
RUN CONTROL
CHAIN 3 LEVEL 2
SHEET 1 0F 1
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