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– 5 –

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 flashing.

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be con-
firmed, it is possible to bring up past occurances of failure for confirmation on the screen:

[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

[Screen display] / channel [5] / Sound volume [-] / Power ON

˘

Note that this differs from entering the service mode (mode volume [+]).

STANDBY/SLEEP lamp

Diagnostic Item

Flash Count*

+B overcurrent/overvoltage

2 times

Vertical deflection stopped

White balance failure

5 times

* One flash count is not used for self-diagnostic.

002 : 000
003 : 000
004 : 000
005 : 001

Numeral "0" means that no fault has been detected.

Numeral "1" means a fault has been detected.

101 : 000

SELF DIAGNOSTIC

Lamp ON 0.3 sec.

Lamp OFF 3 sec.

Lamp OFF 0.3 sec.

2 times

5 times

– 6 –

Since the diagnostic 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-diagnostic function will not be able to detect subsequent faults after
completion of the repairs.

[Clearing the result display]
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

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

[+B overcurrent ªOCPº]

Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to
ON and the voltage to pin 18 of IC301 should go down 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 Q509 and
IC001 shut down the power supply.

[Vertical deflection overcurrent]

Occurs when an overcurrent on V drive line is detected by Q507. Power supply will
be shut down when detect this by IC001.

[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

FROM

CRT

FROM
[+B] Q604 C6

[V] Q509/507

IC001

SYSTEM

IC003

MEMORY

B-DAT

IO-SDAT

IK-IN

MP/
PROTECT

IO-8DAT

O-LED

SDA

5

45

21

18

51

46

35

– 7 –

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