Xerox WorkCentre Pro 423, Service Manual

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WorkCentre Pro 423/428 2-76 CHAPTER 2 TROUBLESHOOTING
03/02 Level 2 Troubleshooting
2.3.2.1 ISDN Line Basic Troubleshooting Flow
Termination
*4
The table at left uses the error codes of Able 3351G/3321G
and DC400G.
G
HUURU
Origination
Originating from or terminating at local machine?
Eject G4M network layer trace data
G3 error
Perform analogue communi-
cation troubleshooting
Yes
Take action based on
cause/diagnosis
Analyze cause/
diagnostic code
Yes
Yes
No
No
Replace
G4M PWB
Start Fax self-diagnosis
Set trace layer to session
and send G4M protocol
by re-communication
Judgment
Action/work
D channel
,&0 HUURU
No
*1
Yes
Yes
Error Code
D channel B channel (Comm mode)
K0-00, 03
K6-03, 07
K9-01
X3-60
ICM
K7-07
X3-00to40
G4 mode
K6-0 to 07
K7-00 to 07
X2-00 to 75
G3 mode
No
Unique to ISDN communication?
kaise
SETUP signal
recorded?
Eject ICM trace data
No
*2
Take action
based on Q931
reason display
Analyze DISC/STATUS signal
from network
No
Yes
Yes
*2
Yes No
DSU TA-RA and TB-RB
voltages from 36 to 42 V?
Communication error
Sending CQ, CI, SQ,
SI, RQ, or RI packet
from remote machine?
Measure voltage at terminal connection block (TA-RA and TB-RB voltages from 36 to 42 V?)
No
(1) (3) (4)
(5)
(2)
Error code displayed?
(6)
Sending CQ, CI, SQ,
SI, RQ, or RI packet
from local machine?
Check cable
continuity. Normal?