KD-34XBR2 - Sony TV Service Manual (repair manual). Page 6

+B overcurrent

2 times

+B/Low B overvoltage

3 times

Vert. deflection stopped

4 times

White balance failure

5 times

Low B OCP/OVP

6 times

Horiz. deflection stopped

7 times

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

Self-Diagnostic Screen Display
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confi rmed, it is possible to bring up 
past occurrences of failure on the screen for confi rmation.

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/i.LINK STANDBY 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/i.LINK STANDBY 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/i.LINK STANDBY 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.  No error has occurred if the screen displays a “0”.

Power does not turn on 

Does not light 

 

•  Power cord is not plugged in. 

•  Power does not come  on.

 

 

 

•  Fuse is burned out (F6701). 

•  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). 

•  Power does not come on.

(see Note 1) 

 

 

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

•  Load on power line is shorted.

 

 

 

•  IC9001, IC9002, IC9003 is shorted (C Board).

Low +B overvoltage (OVP) 

3 times 

3:0 or 3:1 

•  IC6505 is faulty (D Board). +B overvoltage. 

•  Has entered standby mode.

Vertical Defl ection Stopped 

4 times 

4:0 or 4:1 

•  ± 15V is not supplied (D Board). 

•  Has entered standby state after

 

 

 

•  IC5004 is faulty (D Board). 

  Horizontal raster.

 

 

 

   

•  Vertical defl ection pulse is stopped.

 

 

 

   

•  Power line is shorted or power

 

 

 

  

 supply 

is 

stopped.

White Balance Failure 

5 times 

5:0 or 5:1 

•  Video OUT (IC9001-IC9003) is faulty 

•  No raster is generated.

(Not balanced) 

 

 

  (C Board). 

•  CRT cathode current detection

 

 

 

•  CRT drive (IC3101) is faulty (A Board). 

  reference pulse output is small.

 

 

 

•  G2 is improperly adjusted (See Note 2).

LOW +B OCP/OVP 

6 times 

6:0 or 6:1 

•  +5 line is overloaded (A, B Boards). 

•  No picture.

(overcurrent/overvoltage) 

 

 

•  +5 line is shorted (A, B Boards).

(See Note 3)

Horizontal Defl ection Stopped 

7 times 

7:0 or 7:1 

   

•  No picture.

Note 1: If a +B overcurrent is detected, stoppage of the Vertical defl ection is detected simultaneously.  The symptom that is diagnosed fi rst by the microcontroller is displayed on screen.
Note 2: Refer to Screen (G2) Adjustment in Section 2-5. of this manual.
Note 3: If STANDBY/i.LINK STANDBY LED fl ashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment

*  One fl ash count is not used for self-

diagnostic.