Sony KP-53V100 Service Manual page 9

Color rear video projection

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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. 1.3A or more, microcomputer detects it via IC651.

OVP

In case of +B becomes approx. 150V or more, POWER ON RELAY shuts down and microcomputer detects it via IC651.

Reset by turning power on/off just the same as OCP.

V Stop

In case of microcomputer detects 2 seconds or more interval of V Pulse, Reference Pulse turns off by turning off the picture

signal in YC Jungle IC (IC206).

After the picture signal turns off, V Pulse is regenerated 2 seconds or more, the picture signal turns on.

AKB

IK detection. Makes LED blinking in case of microcomputer doesn't detect IK returns of IC206 CXA2147Q 30 seconds or more.

H Stop

In case of HV becomes 33kV or more, IC502 detects it and shut-down H Drive Pulse.

Microcomputer receives H Stop data from IC206 and makes LED blinking.

Audio

In case of DC component overlaps the output of Audio Amp., microcomputer detects it and makes LED blinking.

Microcomputer forces to shut down the power.

Self-diagnosis block diagram

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KP-53V100

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