Sony TRINITRON KV-34FV310 Service Manual page 8

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.
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.
To Bring Up Screen Test
In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:
SELF DIAGNOSIS
2: +B OCP 0
3: +B OVP 0
Numeral "0" means that no fault was detected.
4: VSTOP 0
Numeral "1" means a fault was detected one time only.
5: AKB 1
9: ZCD 0
10: 9VON 0
101: WDT 0
Serial: xxxxxxx
Model: xxxxxxx
Handling of Self-Diagnostic Screen Display
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 when the diagnostic screen is displayed, as shown below:
Channel 8 ENTER
Quitting the Self-Diagnostic Screen
To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.
Self-Diagnostic Circuit
Y/CHROMA JUNGLE
FROM
C BOARD
IK-AKBIN
36
IC702 PIN 5
A BOARD
33
HP(PROT)
FROM
Q530
DISPLAY Channel 5
TO V BOARD
A BOARD
Q904
IC301
BASE
VM-OUT
31
A BOARD
Q651
SDA
61
Sound volume -
A BOARD
IC561
V. OUT
FROM
A BOARD
REF Q003 48
3
COLLECTOR
27
FROM
45
A BOARD
Q6006
ZERO CROSS
COLLECTOR
— 8 —
Power ON.
A BOARD
A BOARD
IC001
IC003
SYSTEM
MEMORY
IO-BDAT
26 5 BDA
I-OCP
O-TIMER-LED
60
DISPLAY
33 38 9V
I_9V CK
KV-34FV310/38FV310