KV-30XBR910 - Sony TV Service Manual (repair manual). Page 6

+BfiOvercurrentfi

2fitimes

Lowfi+BfiOvervoltagefi

3fitimes

Vert.fiDeflectionfiStoppedfi 4fitimes

WhitefiBalancefiFailurefi

5fitimes

Lowfi+BfiOCP/OVPfi

6fitimes

Horiz.fiDeflectionfiStoppedfi 7fitimes

Stopping the Standby/Timer LED Flash
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER LAMP from fl ashing.

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”, an error has occurred.

Power does not turn on

Does not light

_______

• Power cord is not plugged in.
• Fuse is burned out (F501). (A Board)

• Power does not come on.
• No power is supplied to the TV.
• AC Power supply is faulty.

+B Overcurrent (OCP)*

2 times

2:0 or 2:1

• H.OUT (Q5030) is shorted. (D Board)
• +B PWM (Q5003) is shorted.

(D Board)

• Power does not come on.
• Load on power line shorted.

Low +B Overvoltage (OVP)

3 times

3:0 or 3:1

• IC6505 is faulty. (D Board)

• Has entered standby mode.

Vertical Deflection Stopped

4 times

4:0 or 4:1

• 15V is not supplied. (D Board)
• IC5004 is faulty. (D Board)

• Has entered standby mode after

Horizontal raster.

• Vertical deflection pulse is stopped.
• Power line is shorted or power

supply is stopped.

White Balance Failure
(not balanced)

5 times

5:0 or 5:1

• Video OUT (IC9001-IC9003) is faulty.

(CH, CX Board)

• CRT drive (IC2801) is faulty. (B Board)
• G2 is improperly adjusted.**

• No raster is generated.
• CRT cathode current detection

reference pulse output is small.

LOW +B OCP/OVP
(overcurrent/overvoltage)***

6 times

6:0 or 6:1

• +5 line is overloaded. (A, B, M Boards)
• +5 line is shorted. (A, B, M Boards)
• IC504 is faulty. (A Board)

• No picture

Horizontal Deflection
Stopped

7 times

7:0 or 7:1

• No picture

* 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) in Section 2-5 of this manual.
*** If STANDBY/STEREO LED flashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment.

* One fl ash count is not used for 
   self-diagnostic.