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3-7
2. SYSTEM/KEY CIRCUIT
(1) AUTO STOP
(2) The unstable loading of a Cassette tape
Auto Stop
Does the SW25 waveform
appear at the IC501
Pin105?
Do the T-UP Reel Pulses
appear at the IC501 Pin49?
Is 12V applied to the
PMC01 Pin8?
Check the Drum Motor
signal.
Does 5.0V appear at the
RS501?
Check the Power Circuit.
Check the Power.
Is 5.0V applied to the
R544 ?
Refer to SMPS 5.3VA
troubleshooting.
Check the IC501
Pins68, 69, 70, 71.
Do T/UP Reel Pulses
appear at the Q514
Base terminal ?
Replace the T/UP Reel
Sensor (RS501).
Check the CST SW and
the peripheral circuitry.
Replace the IC501.
The unstable loading of a
Cassette tape
Does the “H” signal appear
at the IC501 Pin30 during
inserting the CST ?
Does the “L” signal appear
at the IC501 Pin72 during
inserting the CST?
Check the Deck
Mechanism.
Caution :
Auto stop can occur because Grease or Oil is dried up
YES
YES
YES
NO
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
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 ...
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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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