
MECHANISM TROUBLESHOOTING GUIDE
4-23
No Auto Rewind operates.
Is output of the end sensor “H”?
“H”: 3.5V or less
“L”: 0.7V –1V or less
Is voltage at both ends of the
IR LED 0.8V-1.5?
Replace the LED.
Is the end sensor Vcc applied at
5V?
Check the Syscon power supply.
Replace the end sensor.
Is the Syscon checked?
NO
YES
YES
YES
YES
NO
NO
1.Deck Mechanism
A.
NO
NO
NO
No F/R operates.
Is the current mode an F/R
mode?
Check the assembly position of
the Mode S/W.
Is normal voltage applied at the
Vcc1 and the Vcc2 of the
Capstan motor?
Is the Vctl terminal voltage of the
Capstan Motor applied at more
than 4V?
Check the Servo, Power
circuit.
Replace the Capstan motor.
Does the Capstan motor rotate?
Does the T/up and the supply
reel Operate?
Check the Syscon circuit.
YES
YES
YES
YES
YES
YES
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 ...
Страница 107: ......
Страница 113: ......
Страница 115: ......