C133B: Communication With Option Error; C133C: Modem Error; C133D: Rom Checksum Error - NEC NEFAX 671 Service Manual

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C133B: Communication with option error

<Detection Timing>
• Communication could not be established with the Controller Control Board within 5 sec-
onds while printing.
<Troubleshooting Procedures>
Controller/Mechanical Control Board (PWB-P)
Step Action
1 Replace PWB-P.
(9)

C133C: Modem error

<Detection Timing>
• A malfunction occurred in the Modem.
<Troubleshooting Procedures>
Network Control Unit Board (NCU)
Step Action
1 Replace NCU.

(10) C133D: ROM checksum error

<Detection Timing>
• A malfunction occurred in the ROM.
<Troubleshooting Procedures>
Controller/Mechanical Control Board (PWB-P)
Step Action
1 Replace PWB-P.
Description
Relevant Electrical Components
Ref. Page
Control Signal
☞ D-12
Description
Relevant Electrical Components
Ref. Page
Control Signal
☞ D-11
Description
Relevant Electrical Components
Ref. Page
Control Signal
–
T-22
WIRING DIAGRAM
Location
(Electric Parts)
– –
WIRING DIAGRAM
Location
(Electric Parts)
– –
WIRING DIAGRAM
Location
(Electric Parts)
– –