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Sharp VT-3418X - Page 59

Sharp VT-3418X
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VCR PLAYBACK MODE (LUMINANCE)
TROUBLESHOOTlNG
FLOW CHART NO. 1-15
VCR PLAYBACK MODE
(CHROMA)
TROUflLESHOOTlNG
FLOW CHART NO. 1-16
No Playback.
I
Playback is in black and white.
I
Are there
Y/C
DATA and
NO
Check data and clock
clock signals at pins (9) and
(10)
of
IC2201
respectively?
*
signals from
IC8801.
I
Are there
ri
nats
at pin
(17)
of
lC3381?
NQ
IsthereSVatpin(l6)of
+
IC3301
?
No
t
Check the PC 5V line.
YES
1
YES
Head
cleanning.
NO
GOOD
H
Replace
IC330
1.
I
Check
eripheral
circuit of
42201
Q2202-
42204
(PAVf&SECAM), and
42205~Q2iO7
(NTSC).
I
J
YES
Check the harness from
iXBJ
toICEJ.
I
I
I
1
YES
1
YES
I
I
1
t
Is there a
signal
at pin
NO
Is
the pin
(12)
of
IC2201
NO
(28)
of
IC220
1 ?
‘L”
level ?
t
Check
FV
signal line.
I
I I
I
I
1
YES
1
YES
I
I
Are there
v/C
DATA and
No
clock signals at pins (9) and
(10)
of
IC2201
respectively?
1
YES
I
L
1
I~
Is there a signal at pin
NO
Check all the way up to
(51)
of
IC2201
1
*
pin
(51)
of
IC2201
and
the harness from
YES
[XBJ
toiCE
J.
f
L
I
I
Is there a
signal
at pin
(20)
of
IC2201
7
YES
NO
Check and adjust VCO
*
(FLS501).
Is there a
signal
at pin
(16)
of
IC2201
?
YES
NO
Check DL550 1 and Q55
12
+
(PAL),
DL5502
and Q5513,
Q5514
(NTSC).
NO
Is there
chroma
rotary
NO
’
-
signal at pin
(11)
of
4
Check the
CHRQMA
IC2201
?
ROTARY line.
1,
YES
Check the signal at pin
(7)
of
IC2201
?
(Frequent
,4.43
MHz.
(PA”MESF!CAM,
ABNORMAL
1
Replace
IC5501.
X5501,2,
QSSOS,
10
and
peripheral circuit.
I
Is there a chroma signal
at pin (5) of CC
NO
connector
7
I
I
1
YES
I
1
Check Q230 1 and
harness from
f
EL J to
IADJ.

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