Self-Diagnostic Function - Sony KP-51WS500 Service Manual

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED 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 STANDBY/TIMER LED 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 STANDBY/TIMER LED 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. If the screen displays a "0", no error has occurred.
Diagnostic Item
Power does not turn on
+B overcurrent (OCP)*
+B overvoltage (OVP)
Vertical deflection stopped
White Balance Failure
(Not Balanced)
Low B OCP/OVP
(Overcurrent/Overvoltage) ***
Horizontal deflection stopped
High-voltage error
Audio error
* If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously. The symptom that is diagnosed
first by the microcontroller is displayed on the screen.
** Refer to Screen (G2) Adjustments in Section 2-2 of this manual
*** If TIMER or STAND BY indicator blinks six (6) times, unplug the unit and wait 10 minutes before performing the adjustment.

SELF-DIAGNOSTIC FUNCTION

No. of times
STAND BY /
Probable Cause Location
TIMER
lamp flashes
• Power cord is not plugged in.
Does not light
• Fuse is burned out (F6001). (G Board)
• H.OUT (Q8024) is shorted. (D Board)
2 times
• +B PWM (Q8035, Q8038) is shorted.
(D Board)
• IC501 is faulty. (G Board)
3 times
• IC5002 is faulty. (G Board)
±
4 times
•
15V is not supplied. (D Board)
• IC8003 is faulty. (A Board)
• Video OUT (IC7101, IC7201, IC7301)
5 times
is faulty. (CR, CG, CB Boards)
• CRT drive (IC309) is faulty. (A Board)
• Screen (G2) is improperly adjusted. **
• +5 line is overloaded. (A, B Boards)
6 times
• +5 line is shorted. (A, B Boards)
• Q8035, Q8038 is shorted. (D Board)
7 times
• T8005 is faulty. (D Board)
8 times
• ±
9 times
19V line is shorted. (A, B Boards)
•
IC708 is faulty. (A Board)
•
PS701 or PS702 is opened.
(A Board)
— 7 —
KP-51WS500/57WS500/65WS500
Self Diagnosis
Supported model
Detected Symptoms
• Power does not come on.
• No power is supplied to the TV.
• AC Power supply is faulty.
• Power does not come on.
• Load on power line shorted.
• Has entered standby mode.
• Has entered standby state after
horizontal raster.
• Vertical deflection pulse is
stopped.
• Power line is shorted, or
power supply is stopped.
• No raster is generated.
• CRT Cathode current detection
reference pulse output is small.
• No picture
• No sound