KV-PG14M40 (serv.man2) - Sony TV Service Manual (repair manual). Page 6

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Since the diagnosis results displayed on the screen are not automatically cleared, always check the self-diagnostic
screen during repairs. When you have completed the repairs, clear the result display to “0”.

Unless the result display is cleared to “0”, the self-diagnosis function will not be able to detect subsequent faults after
completion of the repairs.

To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the
diagnostic screen is being displayed.

Channel 

[8] /

0

To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

[+B overcurrent OCP]

Occurs when an overcurrent on the +B(135) line is detected by Q500. If Q500 go to
ON and the voltage to pin 50 of IC301 more than 3.5V when V.SYNC is more than
seven verticals in a period, the unit will automatically turn off.

[Vertical deflection stopped]

Occurs when an absence of the vertical deflection pulse is detected by Pin 17 and
IC001 shut down the power supply.

[White balance failure]

If the RGB levels* do not balance or become low level within 5 seconds, this error
will be detected by IC301. TV will stay on, but there will be no picture.

* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)

IC301

Y/CHROMA JUNGLE

IC001

SYSTEM

IC003

MEMORY

MP/
PROTECT

O-LED

IO-8DAT

B-DAT

IO-SDAT

5

50

51

54

SDA

8

FROM

[+B]

 Q500

17

[V]

 

D553

53