47
VC-A422U
VC-H822U
Playback picture does not appear (E-E mode is possible).
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Is the V-H.SW.P. applied to
pin(81) of IC201?
Although picture is played back, color does not appear (E-E mode is possible).
Is 5V applied to the CCD section power terminal pin(36) of IC201?
Is the control voltage approx. 5V applied normally to pin(37) from pin(57) of IC201? Is CCD clock signal (approx.
7.16 MHz/0.5 Vp-p) applied to pin(44) from pin(69) of IC201?
Check between pins(24) and (23) of IC201. (Check C210.)
Is the luminance signal (approx. 0.5
Vp-p) input into pin(23) of IC201?
Is the luminance signal (approx. 0.5
Vp-p) input into pin(26) of IC201?
Is the luminance signal (approx. 0.5
Vp-p) input into pin(42) of IC201?
Is the luminance signal (approx. 0.5
Vp-p) input into pin(19) of IC201?
Is the FM signal (approx. 0.4 Vp-p)
input into pin(78) of IC201?
Is the luminance signal (approx. 0.4
Vp-p) input into pin(79) of IC201?
Is the luminance signal (approx. 0.5
Vp-p) input into pin(39) of IC201?
Check between the pin(39) and
pin(26) of IC201. (Check C212.)
Check between pin(21) and
pin(42) of IC201. (Check C208.)
Check between pin(18) and
pin(19) of IC201. (Check C206.)
Check between pin(55) and
pin(54) of IC201. (Check C514.)
Check between pins(79) and (78)
of IC201.
Is the luminance signal (approx. 0.25
Vp-p) input and output to pins(13),
(14) and (16) of IC201, respectively?
Is 5V applied to the chroma power
terminal pin(61) of IC201?
Is the chroma signal (approx.
403 mVp-p/Burst) input into
pin(46) of IC201?
Is the chroma signal (approx.
508 mVp-p/Burst) input into
pin(58) of IC201?
Is the chroma signal (approx.
286 mVp-p/Burst) input into
the pin(54) of IC201?
Check between pin(60) and
pin(46) of IC201. (Check C512.)
Check between pin(58) and pin(35) of
IC201. (Check R505, C515.)
Check the periphery of pin(61) of
IC201 and PC 5V line.
Check the periphery of pins(13),
(14) and (16) of IC201. (Check
C203, R201-2, L201, C205, R203.)
Check whether pin(71) and pin(73) of
IC201 oscillate (3.58 MHz)?
Is the chroma signal (approx. 508
mVp-p/Burst) output from pin(35)
of IC201?
Check V-H.SW.P. line.
Replace IC201.
Replace IC201.
FLOW CHART NO.20
FLOW CHART NO.21
Содержание VC-A422U
Страница 50: ...VC A422U VC H822U VC A422U VC H822U 50 51 8 BLOCK DIAGRAM SYSTEM SERVO BLOCK DIAGRAM USMODEL SYSBLO eps ...
Страница 51: ...VC A422U VC H822U VC A422U VC H822U 52 53 SIGNAL FLOW BLOCK DIAGRAM VC A422U ...
Страница 52: ...VC A422U VC H822U VC A422U VC H822U 54 55 SIGNAL FLOW BLOCK DIAGRAM VC H822U ...
Страница 53: ...56 VC A422U VC H822U POWER CIRCUIT BLOCK DIAGRAM ...
Страница 61: ...69 VC A422U VC H822U A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 PWB FOIL PATTERN OPERATION PWB LCD PWB ...
Страница 63: ...72 VC A422U VC H822U M E M O ...
Страница 76: ...85 VC A422U VC H822U M E M O ...