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MECHANISM TROUBLESHOOTING GUIDE
4-26
No cassette insert is done.
Does the lever assembly
switch operate?
Is the lever assembly switch
spring normal?
Does the CST IN switch
operate normally?
Add or replace the lever
assembly switches spring.
Is the Vcc of the main P.C.B
assembly?
YES
YES
Check the Syscon circuit.
YES
Check the power circuit.
NO
Is voltage between the cassette
switch terminal and the GND on
the main P.C.B assembly?
YES
Is there short between the cassette switch terminal
and the GND on the main P.C.B assembly?
Replace the main P.C.B assem-
bly or remove the short part.
NO
Check the mode switch position
and the Syscon circuit.
Replace the CST IN switch.
YES
NO
YES
NO
NO
Replace the F/L switch.
NO
NO
No cassette eject is done.
Does the L/D motor turn in reverse?
Check the L/D motor and the drive IC.
Replace the lever assembly switch.
Does the lever assembly switch operate?
YES
NO
NO
Does the arm assembly F/G operate?
YES
NO
Does the opener door operate?
YES
Replace the arm assembly F/L
Replace the opener door.
2. Front Loading Mechanism
A.
B.
Содержание DVP 721VR
Страница 36: ...3 32 3 33 2 POWER SMPS CIRCUIT DIAGRAM 2 ...
Страница 37: ...3 34 3 35 3 TU IF NICAM A2 CIRCUIT DIAGRAM EE MODE VIDEO TU MODE AUDIO ...
Страница 40: ...3 40 3 41 6 SCART JACK CIRCUIT DIAGRAM ...
Страница 45: ...3 50 3 51 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD VCR DVD _SOLDER SIDE LOCATION GUIDE ...
Страница 46: ...3 52 3 53 2 MAIN P C BOARD VCR DVD _COMPONENT SIDE LOCATION GUIDE ...
Страница 60: ...3 68 F FE RFL FIG 7 2 DVD F FE RFL FIG 7 3 CD ...
Страница 61: ...3 69 F FE RFL FIG 7 4 CD 8 FOCUS ON WAVEFORM FE FOSO F F FIG 8 1 DVD ...
Страница 63: ...3 71 10 TRACKING CONTROL RELATED SIGNAL System checking TE TRSO T T FIG 10 1 DVD TE TRSO T T FIG 10 2 CD ...
Страница 64: ...3 72 11 MT1389 AUDIO OPTICAL AND COAXIAL OUTPUT SPDIF FIG 11 1 12 MT1389 VIDEO OUTPUT WAVEFORM 1 100 FIG 12 1 ...
Страница 65: ...3 73 13 MT1389 AUDIO OUTPUT TO AUDIO DAC 2 COMPOSITE VIDEO SIGNAL FIG 12 2 FIG 13 1 ...
Страница 66: ...3 74 FIG 14 1 14 AUDIO OUTPUT FROM AUDIO DAC ...
Страница 71: ......
Страница 72: ...3 79 3 80 CIRCUIT DIAGRAMS 1 SYSTEM CIRCUIT DIAGRAM ...
Страница 73: ...3 81 3 82 2 RF DSP SERVO CIRCUIT DIAGRAM ...
Страница 74: ...3 83 3 84 3 AV JACK CIRCUIT DIAGRAM ...
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