Sony TRINITRON KV-ES34M31 Service Manual page 7

6. SELF-DIAGNOSTIC CIRCUIT
FROM
CRT (IK)
[H] IC6801
[V] D6806/D6801
[+B overcurrent ªOCPº]
[+B overvoltage ªOVPº]
[Vertical deflection failure]
[White balance failure]
[High voltage protector of Horizontal Deflection]
IC4301
RGB JUNGLE OVP OCP
25 IKIN
20
XRAY
SDA
16 V PROT
CXA2100Q
Occurs when an overcurrent on the +B(135) line is detected by Q6610
and Q6609.
If Q6610 and Q6609 go to ON, the voltage to the pin3 of IC001 go to UP.
The unit will automatically turn off.
Occurs when an overvoltage on the +B(135) line is detected by D6635,
Q6611 and Q6612. If Q6611 and Q6612 go to ON, the voltage to pin6 of
IC001 go to UP. The unit will automatically turn off.
Occurs when an absence of the vertical deflection pulse is detected by
Q6811, Q6819, Q6820, Q6821 and D6801. Shut down the power supply.
If the RGB levels do not balance or become low level within 5 seconds.
This error will be detected by IC4301.
TV will stay on, but there will be no picture.
Occurs when an overvoltage of horizontal pulse is detected by D6809 and
IC6801.
If the voltage of 7 pin of IC6801 goes to High, the voltage to pin20 of
IC4301 go to UP. The unit will automatically turn off.
– 7 –
KV-ES34M31/ES34M61/ES34M80/ES34M90
IC001
SYSTEM
3
SDA
6
54
LED
IC003
MEMORY
5
5
IC004
MEMORY
RM-916