Read Sony KV-36FS12 Service Manual online
—
6 —
KV-36FS12/36FS16/36FV16/36FV26
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:
ENTER
Channel 8
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
A BOARD
IC355
Y/CHROMA JUNGLE
A BOARD
IC561
V. OUT
A BOARD
IC001
SYSTEM
A BOARD
IC1002
MEMORY
IK IN
FROM
C BOARD
IC1701 PIN1
21
HP/PROTECT
SDA
A BOARD
FROM
IC501
PIN 1
18
35
IO-SDATN
O-TIMELED
27
REF
3
VM
IO-BDATN
15
26
BDA
5
59
DISPLAY
+B overcurrent (OCP)
Occurs when an overcurrent on the +B (135V) line is detected by pin 18 of IC355 (A Board).
If the voltage of pin 18 of IC355 (A Board) is less than 1V when V.SYNC is more than seven
verticals in a period, the unit will automatically turn off.
If the voltage of pin 18 of IC355 (A Board) is less than 1V when V.SYNC is more than seven
verticals in a period, the unit will automatically turn off.
+B overvoltage (OVP)
Occurs when the feedback circuit from +B opens IC643 or T603 or any other associated
feedback components.
feedback components.
V-Stop
Occurs when an absence of the vertical deflection pulse is detected by pin 15 of IC355 (A
Board). Power supply will shut down when waveform interval exceeds 2 seconds.
Board). Power supply will shut down when waveform interval exceeds 2 seconds.
IK (AKB)
If the RGB levels* do not balance within 2 seconds after the power is turned on, this error will
be detected by IC355 (A Board). TV will stay on, but there will be no picture.
be detected by IC355 (A Board). TV will stay on, but there will be no picture.
*(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).
NOTE:
Watch Dog Timer
Watch Dog Timer
Indicates how many times the Watch Dog Timer functions have been activiated. Whenever
micro is reset by the Watch Dog Timer, this number is incremented. Maximum number is 255.
micro is reset by the Watch Dog Timer, this number is incremented. Maximum number is 255.
Click on the first or last page to see other KV-36FS12 service manuals if exist.