Sony TRINITRON KV-29FS105 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
4: VSTOP 0
Numeral "0" means that no fault was detected.
5: AKB 1 Numeral "1" means a fault was detected one time only.
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
FROM
33
HP(HLDWN)
A BOARD
IC501
PIN1
KV-29FS105/34FS105/38FS105
DISPLAY Channel 5
TO V BOARD
A BOARD
Q904
IC301
BASE
VM-OUT
31
A BOARD
Q561
SDA
61
Sound volume -
A BOARD
IC561
V. OUT
FROM
A BOARD
REF Q003
3
COLLECTOR
KV-29FS105/34FS105/38FS105
Power ON.
A BOARD
IC001
SYSTEM
IO-BDAT
26
48
I-OCP
O-LED
60
IO-SDAT
27
A BOARD
IC003
MEMORY
5
BDA
DISPLAY
8