Read Sony KP-FX432M90 / KP-FX532M90 Service Manual online
KP-FX432M90/FX532M90
RM-1014
– 8 –
+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.
+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.
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 sec-
onds.
White 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.
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.
1-6. SELF-DIAGNOSTIC CIRCUIT
IC0001
MAIN MICRO
22 STBY-LED
5 OCP
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
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