Service manual

SC Tables
SM 6-27 D127/D128
Trouble –
shooting
No.
Definition
Symptom Possible Cause/Countermeasure
835 Self-diagnostic error: Centronic device
[1102] C
Loopback connector is
connected but check results in an
error.
 IEEE1284 connector error
 Centronic loopback connector
defective
1. Replace the controller board.
[110C] C
Loopback connector is
connected but check results in an
error.
 ASIC device error
 IEEE1284 connector error
 Centronic loopback connector
defective
1. Replace the controller board.
[1120] C
Centronic loopback connector is
not connected for detailed
self-diagnostic test.
 Centronic loopback connector
not connected correctly
 Centronic loopback connector
defective
 ASIC device defective
1. Replace the controller board.
838
[2701]
B
Self-diagnostic Error: Clock Generator
A verify error occurred when
setting data was read from the
clock generator via the I2C bus.
 Defective clock generator
 Defective I2C bus
 Defective I2C port on the CPU
1. Replace the controller board.