3-8
3. SERVO CIRCUIT
(1) Unstable Video in PB MODE
Unstable Video in
PB Mode.
Does the Noise level of the
screen change
periodically?
Do the CTL pulses appear
at the IC501 Pin8?
Is adjusting the height of
the CTL Head accurate?
Readjust the height of the
CTL Head.
Replace the IC501.
Refer to “When the Y signal
doesn’t appear on the
screen in PB Mode”.
Does the CFG waveform
appear at the IC501
Pin9?
On tracking do the CTL
pulses move?
Does the Video Envelope
waveform appear at the
IC501 Pin24?
Replace the IC501.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
(2) When the Drum Motor
(2)
doesn’t run.
Do the DFG Pulses appear
at the PMC01 Pin11?
Replace the Cap M.
Aren’t the foil patterns and
the Components between
IC501 Pin104 and PMC01
Pin11 short?
Replace the IC501.
Refer to “(2)
No 12VA of Power section”
Do the Drum PWM Pulses
appear at the IC501
Pin107?
Aren’t the foil patterns and
the Components between
IC501 Pin107 and PMC01
Pin12 short?
Do the DFG Pulses appear
at the IC501 Pin104?
Do the Drum PWM Pulses
appear at the IC501
Pin107?
Aren’t the connecting patterns and the Components
between IC501 Pin107 and PMC01 Pin12 short?
When the Drum Motor
doesn’t run,
Does 12V appear at the
PMC01 Pin8?
Does 2.8V appear at the
PMC01 Pin12?
Check the connector
(PMC01) and the Drum
Motor Ass’y.
NO
YES
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES
Содержание DVD755VR
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Страница 26: ...Personal Notes ...
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Страница 59: ...3 38 3 39 5 SCART JACK CIRCUIT DIAGRAM OPTIONAL PART COMBI SCART ...
Страница 61: ...3 42 3 43 7 TIMER CIRCUIT DIAGRAM ...
Страница 65: ...3 50 3 51 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE ...
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Страница 87: ...3 73 3 C IC604 PIN 26 FIG 13 3 14 AUDIO OUTPUT FROM AUDIO DAC 1 Audio L R FIG 14 1 JK601 PIN 4 5 ...
Страница 88: ...3 74 2 Audio related Signal ASDAT3 IC501 PIN 157 ABCK IC501 PIN 148 ALRCK IC501 PIN 149 ASDATA3 FIG 14 2 ...
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Страница 95: ...3 81 3 82 2 RF DSP SERVO CIRCUIT DIAGRAM CD DVD LD will not on COMBI SCART MTK 03 3 25 SR17445A ...
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Страница 97: ...3 85 3 86 4 AV JACK CIRCUIT DIAGRAM COMBI SCART MTK 03 3 25 SR17446A ...
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Страница 133: ...MEMO ...
Страница 134: ...EXPLODED VIEW 1 Deck Mechanism Exploded View 5 1 CONTENTS SECTION 5 MECHANISM OF DVD PART ...