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6. 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
8
µProcessor
20
21
3. OVP
2. OCP
4. V.STOP (V Pulse)
D1201
TIMER/STANDBY
55
5. AKB
6. H STOP
IC002
49
47
50
BUS
48
22
IC064
EEPROM
5. AKB
IC406
Audio AMP
Audio
IC651
OVP Buffer
OCP Buffer
KP-43T70K/43T70T/48VS70K/53VS70K/53VS70T
RM-Y906K
RM-Y906
Q006
IC206
43
3
35
CXA2147
4
34
YCJ
HV Detector
27
IC1509
V Drive
V Pulse Buffer
DC Detect
OVP DETECT
OCP DETECT
– 5 –
RM-Y906K
RM-Y906K
6. HV STOP
IC1502
Q1505
C Board
RM-Y906
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