Read Sony KF-42WE620 / KF-50WE620 Service Manual online
7
KF-42WE620/50WE620
KF-42WE620/50WE620
SELF-DIAGNOSTIC FUNCTION
Self Diagnosis
Supported model
The units in this manual contain a self-diagnostic function. If an error occurs, the POWER/STANDBY will automatically begin to fl ash. The number of
times the LED fl ashes translates to a probable source of the problem. A defi nition of the POWER/STANDBY fl ash indicators is listed in the instruction
manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the Remote Commander can be used to review the failure
occurrence data stored in memory to reveal past problems and how often these problems occur.
times the LED fl ashes translates to a probable source of the problem. A defi nition of the POWER/STANDBY fl ash indicators is listed in the instruction
manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the Remote Commander can be used to review the failure
occurrence data stored in memory to reveal past problems and how often these problems occur.
Diagnostic Test Indicators
When an error occurs, the POWER/STANDBY will fl ash a set number of times to indicate the possible cause of the problem. If there is more than one
error, the LED will identify the fi rst of the problem areas.
Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.
When an error occurs, the POWER/STANDBY will fl ash a set number of times to indicate the possible cause of the problem. If there is more than one
error, the LED will identify the fi rst of the problem areas.
Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.
Diagnostic Item
Description
No. of times
POWER/STANDBY
lamp flashes
Probable Cause Location
Detected Symptoms
Power does not turn on
0
• Power cord is not plugged in.
• Fuse is burned out.
• Fuse is burned out.
(F1901 on F Board)
• Power does not come
on.
• No power is supplied
to the unit.
• AC power supply is
faulty.
Lamp cover error
3 times
• Lamp cover is not attached
securely.
• No picture/No sound
Fan stopped
4 times
• Fan1, Fan2, or Fan 3 power
is not supplied. .
(A Board)
(A Board)
• Fan connector is not attached
securely
• No picture/No sound
Temp error
4 times
• Temperature is high.
• IIC-E line connector
• IIC-E line connector
(CN8023 on A Board,
CN44 on H Board) is not
attached securely.
CN44 on H Board) is not
attached securely.
• No picture/No sound
Lamp driver error
5 times
• Lamp driver is faulty.
• No picture/No sound
+B OVP error
6 times
• +17V is not supplied.
(G1 Board)
• No picture/No sound
Audio error
7 times
• Audio line is shorted.
(A, G1 Board)
• IC8504 (A Board) or IC4704
(AU Board) is faulty.
• PS1601 or 1602 is opened.
(G1 Board)
• No picture/No sound
D-OVP error
8 times
• +3.3V or +2.5V or 1.8V is
over voltage.
(G3 Board)
(G3 Board)
• No picture/No sound
Lamp error
LAMP-LED flashes
• Lamp for the light source has
burnt out.
• No picture/No sound
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