Sony TRINITRON KV-SZ252M50 Service Manual page 5

KV-SZ252M50/M61/M81/N50/N60
4. SELF DIAGNOSTIC SCREEN DISPLAY
SELF DIAGNOSTIC
2 : 000
3 : N/A
4 : 000
5 : 001
8 : 002
101 : N/A
5. HANDLING SELF DIAGNOSTIC SCREEN DISPLAY
No. Description
1. Display self diagnostic screen
2. Stop standby flash
3. Clear fault result
4. Quit self diagnostic screen
6. SELF-DIAGNOSTIC CIRCUIT
FROM
CV BOARD
IC751 PIN 5
A BOARD
FROM
Q816
COLLECTOR
[+B overcurrent $OCP%]
[V-PROTECT]
[IK $AKB%]
POWER SUPPLY NG (+5V)
for VIDEO PROCESSOR
* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)
RM-GA002
"0" means no fault has been detected.
"1" means a fault has been detected.
"2" means two faults has been detected.
"N/A" means not available for this models.
[Display] t [Channel ] t [Volume ] t [Power / TV]
Note: The above must be performed while TV is on standby mode.
i) Turn off power switch on main.
ii) Unplug power cord from the outlet.
In self diagnostic screen, press
Note: Diagnostic results display on screen is not automatically cleared. Therefore,
clear result after completion of repair.
Turn off power switch of remote commander or main unit.
A BOARD A BOARD
IC001 IC503
Y/CHROMA JUNGLE V.OUT
84 IK F.B-PLS
32 EHT0
Occurs when an overcurrent on the +B(135V) line is detected by pin 32 of IC001 (A board).
If the voltage of pin 32 of IC001 (A board) is more than 4V, the unit will automatically go to
standby.
Occurs when an absence of the vertical deflection pulse is detected by pin 13 of IC001
(A board).
If the RGB levels* do not balance within 15 sec after the power is turned on, this error will be
detected by IC001 (A board). TV will stay on, but there will be 5 times LED blinking.
Occurs when IC001 internal HV protect detects an abnormal H-Pulse (frequency) due to
improper power supply to IC001. TV cuts off high voltage power of anode CRT. No picture will be
detected. eg: IC602, IC604 go faulty.
Method
5
A BOARD
IC001
SYSTEM
SDA1
3 13
V.GUARD
RED LED
– 4 –
[Channel ] t
-
8
A BOARD
MEMORY
99
5
122
DISPLAY
IC003
SDA