Read Sony KP-FR43M31 / KP-FR43M91 Service Manual online
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KP-FR43M31/FR43M91
RM-GA001
1-6. SELF-DIAGNOSTIC CIRCUIT
IC0001
MAIN MICRO
22 STBY-LED
5 OCP
6 OVP
6 OVP
53 SCL
52 SDA
AKB 24
CLKO 14
V PROT 56
87 LOW B ERR
33 HV PROT
AC RLY 36
DATO 13
HG PROT 57
2
1
3
1
< +15V
<+B OCP>
<IK PROT2>
<+B OCP>
<+B OVP>
2
3
1
< H PLS
Q6108
Q6102
Q6803
CRT
VDY-
+12V
Q5202
RY6000
<P_SW(-)
IC6201
+B>
IC8001
IC6801
+15V
<
Q6802
+B>
D6805
< +B
STBY-LED
Q6105
D6803
D6122
D6121
MG BOARD
A BOARD
D BOARD
+B overcurrent (OCP)
Occurs when excessive current flows through R6812.
The increase in voltage across Q6803 causes it to turn on which sends a high
signal to the micro.
The increase in voltage across Q6803 causes it to turn on which sends a high
signal to the micro.
+B overvoltage (OVP)
IC6801 detects +B OVP condition and Q6802.
This sends a high signal to the micro and also shuts down the AC relay.
This sends a high signal to the micro and also shuts down the AC relay.
V-STOP
Occurs when an absence of the vertical deflection pulse is detected by pin 56
of IC0404. (MG board)
Power supply will shut down when waveform interval exceeds 2 seconds.
of IC0404. (MG board)
Power supply will shut down when waveform interval exceeds 2 seconds.
While balance failure
If the RGB levels* do not balance within 2 seconds after the power is turned
on, this error will be detected by IC0401.
TV will stay on, but there will be no picture.
on, this error will be detected by IC0401.
TV will stay on, but there will be no picture.
Low +B OCP/OVP
Occurs when set 5V is out.
Horizontal deflection stopped
Occurs when either:
1) a +B overcurrent is detected (Q6803), or
2) IC0401 (MG board) is damaged.
1) a +B overcurrent is detected (Q6803), or
2) IC0401 (MG board) is damaged.
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