Self Diagnosis Function - Sony KDS-50A2000 Service Manual

1. Summary of Self-Diagnosis Function
- This device includes a self-diagnosis function.
- In case of abnormalities, the POWER indicator automatically blinks. It is possible to
predict the abnormality location by the number of blinks. The Instruction Manual
describes blinking of the POWER 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 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. over
La mp cover
Fan error
Lamp driver
Power error
Audio prot
Power OVP
Device error
Lamp error
KDS-50A2000/50A2010/55A2000/60A2000/60A2010
K
SECTION 1

SELF DIAGNOSIS FUNCTION

Number of times
POWER
indicator blinks
-The periphery of lamp
2 times
heats up abnormally
- L amp cover is not
3 times
attached securely.
- Fan1 power is not
supplied.
4 times
- Fan connector is not
attached securely.
5 times
- Lamp driver is faulty.
- D5V is not
6 times
supplied.
7 times
- Speaker line is shorted.
8 times -7V is over voltage.
Temperature sensors,
Bus decoder ICs
(IC1700, 1800, 1900,
9 times
5066, 2305)
IC6402
- Lamp for the light
L AMP-LED flashes
source burns out.
– 11 –
RM-YD010 RM-YD010 RM-YD010
Probable Cause
Defected symptoms
Location
- 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
-No picture
- No picture/No sound
RM-YD010 RM-YD010