Read Sony KP-51HW40 / KP-57HW40 Service Manual online
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KP-51HW40/57HW40
RM-Y909
RM-Y909
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. 1.5A 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 case of V Drive disappeared, Q8001 detecs it and shut-down POWER ON RELAY. Microcomputer detects it and makes LED
blinking.
AKB
IK detection. Makes LED blinking in case of microcomputer doesn’t detect IK returns of IC309 (CXA2150AQ) 20 seconds or
more.
H Stop
In case of H DRIVE is disappeared, Q378 detects it and shut-down POWER ON RELAY shuts down.
Microcomputer receives H Stop data from Q378 and makes LED blinking.
HV Stop In case of HV becomes 33KV or more. IC8006 detects it and shut-down
POWER ON RELAY. Microcomputer makes LED blinking.
Audio
In case of DC component overlaps the output of Audio Amp., POWER ON RELAY shuts down.
Microcomputer detects it and makes LED blinking.
Self-diagnosis block diagram
49
53
43
24
45
44
31
28
29
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
V Drive
IC708
6. H STOP
BUS
26
30
OVP DETECT
OCP DETECT
Audio AMP
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