Sony KP-46WT500 - 46" Hi-scan 1080i 16:9 Projection Television, Service Manual

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KP-46WT500
Self-Diagnosis Function Operation
OCP Low B and +B line detect DET SHORT, and shut-down POWER ON RELAY.
Reset by turning power on/off. In case of +B is loaded approx. 1.5A or more, microcomputer detects it via IC5005.
OVP In case of +B becomes approx. 150V or more, POWER ON RELAY shuts down and microcomputer detects it via IC5005.
Reset by turning power on/off just the same as OCP.
Low B Occurs when set +5V is out
V Stop In the case of the V Drive disappearing, Q8001 detects it and shuts-down the POWER ON RELAY. The microcomputer detects it and
causes the LED to blink.
AKB IK detection. Makes LED blink when microcomputer doesn’t detect IK, returns of IC309 (CXA2150AQ) 20 seconds or more.
H Stop In case H DRIVE disappears, Q378 detects it and shuts-down POWER ON RELAY.
Microcomputer receives H Stop data from Q378 and makes the LED blink.
HV Stop In case HV becomes 33kV or more, IC8006 detects it and shuts-down POWER ON RELAY.
The microcomputer makes the LED blink.
Audio In case of DC component overlaps the output of Audio Amp., the microcomputer detects it and shuts-down POWER ON RELAY.
The microcomputer makes the LED blink.
Self-Diagnosis Block Diagram
49
53
43 24 45 44
31
28
29
25
58
35
34
5. AKB
5. AKB
4. V STOP
3. OVP
2. OCP
6. LOW B
8. HV.STOP
9. Audio
IC704
MAIN-CPU
IC309
CXA2150AQ
Y/C JUNGLE
D9101
TIMER/STANDBY
R765
IC702
EEPROM
IC703
EEPROM
Q714
+5V DETECT
Q378
H PULSE
Detector
IC8006
HV Detector
Q8001
V Pulse Detector
IC5005
OVP Buffer
OCP Buffer
C Board
DC Detect
IC8003
V Drive
IC708
6. H STOP
BUS
26
30
OVP DETECT
OCP DETECT
Audio AMP