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Sharp VC-90ET

Sharp VC-90ET
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PLAYBACK
MODE
(LUMINANCE)
TROUBLESHOOTING
—
sow
cuaaT
No.
14
No
Playback.
Are
there
signals
at
pin
Sus
on
i
Is
there
5V
at
pin
@)
of
an
of
1€301
?
1C301
?
Check
the
PB5V
line.
YES
Is
there
H.
SW.
Pat
pin
@
of
1€301
?
YES
‘
Replace
1C301.
Check
peripheral
circuit
of
Q215,
216,
217
(NTSC)
Q218,
219,
220
(PAL).
Check
the
H.
SW.
pulse
ine.
Is
there
a
si
@
of
1€201
gia!
at
pin
Check
the
harness
from
[xB
J
to
[ce
J
Is
there
SV
at
pin
of
1C201?
‘
YES
Check
the
DC
level
at
pin
@)
of
1C201(DC
*H”
level
)
Check
Q205
and
PC9V
and
AT6.5V
lines.
Is
there
a
signal
at
pin
@
of
IC201?
YES
Check
the
EE
(H)
fine.
YES
Check
R209
(PB
level
ADJ.)
Repface
C201
or
FL201.
Is
there
a
signal
at
pin
Q)of
(C2017
YES
.
Istherea
He
at
pin
®
of
'c20
Replace
C201,
-
RECORDING
MODE
PAL.
NTSC.
MESECAM
(CHROMA)
TROUBLESHOOTING
Record
isin
black
and
white
(£-E
colour
mode
).
Is
there
5V
at
pin
@
of
1€501
?
YES
Check
the
EE
line
(Q526,
Q527,
FLS01).
Is
there
a
signal
at
pin
@
of
IC501
?
(Video
signal!)
Check
Q501
and
the
PCOV
,
AT6.5V
lines.
Check
the
DC
level
at
pin
|
NO
®
of
1C501?
beg
Colour
-DC2.4V
FE
/-AB&W-
DCOV
Is
there
a
signal
at
pin
Check
the
EE5V
line
©@
of
1€501?
(DS02).
Is
there
a
signal
at
pin
©
of
IC501
?
Check
the
composite
sync
line.
YES
Is
there
a
signal
at
pin
Check
the
CHROMA
@oficso1.
ROTARY
line.
YES
Check
the
OC
level
at
pin
®
of
1c501?
(Colour
«++
H,
B&W
«+
Check
Q508
emitter
Frequency
«-
4.433619
Frequency
=~
3.579545
(NT3.58)
Replace
1C501.
!s
there
a
signal
at
pin
Wet
1€301,
when
R321
‘Oo
minimum.
Is
there
a
signal
at
[XBJ,
[CEJ
CONNECTOR
©
pin
YES
Check
R320
(REC.
C.
LEV).
Change
Q505.
FLOW
CHART
NO.
15
(PAL,
MESECAM,
NT4.43)
1506-9A

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