Self Diagnosis Function - Sony KF-WE50A1 Service Manual

1. Summary of Self-Diagnosis Function
• This device has a self-diagnosis function.
• In case of failure, the POWER/STANDBY or LAMP LED blinks or lights to assist service.
It is possible to specify the cause of the failure by the number of blink or the LED itself.
The following list shows the interpretation of those LED related information.
• For the failure hard to be reproduced, its record is stored at the internal NVM.
The record can be displayed with the remote commander to specify the cause of the failure.
2. Diagnosis and probable cause of Failure
• In case of failure, the POWER/STANDBY or LAMP LED blinks or lights to indicate the following diagnosis.
If two or more failures occurred at one time, the one occurred first will be indicated.
If they occurred simultaneously, the one corresponds to the fewer times of blink will be indicated.
• All the failure records listed below can be displayed on the screen.
" 0 " will be displayed when there is no failure record.
Diagnosis
Lamp cover error
Fan error
Temp error
Lamp driver error
Low B error
Audio error
D-OVP error
Lamp error
SECTION 1

SELF DIAGNOSIS FUNCTION

Number of blink of
STANDBY or LAMP
LED
3 times
4 times
4 times
5 times
6 times
7 times
8 times
LAMP-LED is ON.
KF-WE42A1/WE50A1/WS60A1
Probable Cause
- Lamp cover is not
fastened securely.
- Fan 1-4 Power is no
supplied. (G2 board)
- Fan connector is not seated
securely.
- Fan caught wires or
harnesses.
- Internal temperature is too
high.
- IIC-E line
connector (WE: H3 board,
WF/XS : H4) is not seated
properly.
- Lamp driver defect
- No "DD 6V" output (G1)
- "PROT" is high (F)
-Short-circuit of Audio
power supply line (KD, G1)
- Blowout of a fuse
(F4702, F4703, F4704 on KD) - No picture/No sound
- IC failure
(IC4703, IC4708, IC4710 on
- Overvoltage of +3.3V or
+2.5V (A, B board)
- Lamp is dead
– 5 –
RM-1022 RM-1022
Problem
- No picture/No sound
- No picture/No sound
- No picture/No sound
- No picture/No sound
- No picture/No sound
- No picture/No sound
- No picture/No sound
RM-1022