Sony KF-50XBR800RM-Y912 Service Manual page 8

• This device includes a self-diagnosis function.
• In case of abnormalities, the STANDBY indicator automatically blinks. It is possible to predict the abnormality location by the number
of blinks. The Instruction Manual describes blinking of the 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.
• When a malfunction occurs the 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 STANDBY/STEREO
indicator blinks
Power does not turn on
Lamp cover error
FAN stopped
Lamp driver error
Low B error
Audio error
Lamp error
LAMP TIMER STAND BY
Release of STANDBY indicator blinking.
The STANDBY indicator blinking display is released by removing the plug
from the power or leaving for 2 minutes.
No. of times
Probable Cause Location
Power cord is not plugged in.
0
Fuse is burned out (F1601) (G board)
3 times Lamp cover is not attached securely.
FAN1 or FAN2 power is not supplied. (A board)
4 times
FAN connector is not attached securely.
5 times Lamp driver is faulty.
6 times +5 V is not supplied. (G board)
Audio ±15 V line is shorted. (A, G board)
9 times IC1203 or IC1204 is faulty. (A board)
PS1601 or 1602 is opened. (G board)
LAMP LED
Lamp for the light souce burns out.
flashes
One blink is not used for self-diagnosis.
*
¥EXAMP E
<Diagnosis Items> <Number of Blinks>
¥ amp Cover
¥ FAN
amp ON : 0.3 seconds
amp OFF : 0.3 seconds
Power does not come on.
No power is supplied to the unit.
AC power supply is faulty.
No picture/No sound
No picture/No sound
No picture/No sound
No picture/No sound
No picture/No sound
No picture/No sound
3 times
4 times
amp OFF :
3.0 seconds
Detected symptoms