Self Diagnosis Function - Sony KDF-E42A10 Service Manual

1. Summary of Self-Diagnosis Function
- This device includes a self-diagnosis function.
- In case of abnormalities, the POWER/STANDBY indicator automatically blinks. It is
possible to predict the abnormality location by the number of blinks. The Instruction
Manual describes blinking of the POWER/STANDBY indicator.
- If the symptom is not reproduced sometimes in case of a malfunction, there is recording of
whether a malfunction was generated or not. Operate the remote command to confirm the
matter on the screen and to predict the location of the abnormality.
2. Diagnosis Items and Prediction of Malfunction Location
- When a malfunction occurs the POWER/STANDBY indicator only blinks for one of the
following diagnosis items. In case of two or more malfunctions, the item which first
occurred blinks. If the malfunctions occurred simultaneously, the item with the lower
blink count blinks first.
- The screen display displays the results regarding all the diagnosis items listed below.
The display "0" means that no malfunctions occurred.
Diagnosis Item
Temp error
La mp cover error
Fan stopped
Lamp driver error
Low B error
Audio error
D- OVP error
ATSC OVP
Lamp error
SECTION 1

SELF DIAGNOSIS FUNCTION

Number of times
POWER/STANDBY
indicator blinks
- Set temperture is high.
- Temp sensor connector
2 times
is not attached securely.
(CN7020 on HB board,
CN7180 on S2 board)
- L
3 times attached securely.
-Lamp is not set securely.
- F an 1-4 power is not
supplied. (AGU board)
- F
4 times
attached securely.
-Fan caught wires or
harnesses.
- Lamp driver is faulty.
5 times
- B_12V is not supplie
6 times
(GT board)
- Short-circuit of Audio power
supply line.
-Blow out of fuse.
7 times
(PS3001 on K board)
-IC failure.
(IC3005 on K board)
-B -12V is over voltage.
8 times
(B board)
-Q_10.5V is over voltage.
10 times
(GT board)
- Lamp for the light
LAMP-LED flashes
source burns out.
– 11 –
K
Probable Cause
Location
- No picture/No sound
amp cover is not
- No picture/No sound
an connector is not
- No picture/No sound
- No picture/No sound
d.
- No picture/No sound
- No picture/No sound
- No picture/No sound
- No picture/No sound
- No picture/No sound
KDF-E42A10/E50A10
RM-YD003 RM-YD003
Defected symptoms