FLOW CHART
~0.23
P
LA
YBA
C
K
MODE
(CHROMA)
TROUBLESHOO
T
ING
Playback is possible but without
colour.
FLOW CHART NO.25 Hi-Fi TROUBLESHOOllNG
(1)
I
No Hi-Fi E-E sound heard
I
lsthere a signal at pin
(19)
of
IC301?
Replace
IC301.
Audio signal input from tuner.
&YES
J
LineAudiosignal input.
I
I
YES
Check between pin
(19)
of
iC3Ol
*
and all the way up thru to pin (53)
of
ic201.
I
AYES
NO
Check between pin (55) and all the
*
way up thru to pin (56) of
IC201.
(Check C-CCD circuit)
NO
Check peripheral circuits of
X501
and X502.
NO
Check between pin (19) and the
*
way
upthru
to pin (23) of
IC201.
+YES
I
Replace
IC201.
FLOW CHART NO.24 PLAYBACK MODE
(CHROMA)
TROUBLESHOOTING
(VC-MH80
ONLY)
I
Playback is possible but without
colour.
(PAL mode is OK)
I
,
I
4
t
IsSECAMIMESECAM
SELECT
Switch at SECAM position?
NO
I
Putthe unit in
theSECAM
mode.
I
+YES
I
, I
Check peripheral parts of AZ-ZA
IC53017
Is there signal at pin (12) of
lC53017
+YES
NO
Check 95301, E-E(L) line,
IC
5301
and peripheral parts.
Is base signal
of
Q5304 biased?
NO
*
Check SECAM
5V
line.
&YES
I
Is audio signal
Check line betw-
inputted to pins
(2)
N0
een
NICAM
or
IGR
[L
-
W
and (35)
IR-
-
Decoder circuit and
CH]
of
IC6301
7
the Hi-Fi circuit.
YES
[VC-MH90 only)
.---------------
Checkthe line
between the IF
unit’s Audio Out
and the Hi-Fi
circuit. [VC-MH80
onbl
pins
(18)
and (16) of
IC6301
?
YES
---I-
I
Check
IC6301
and
IC701,
and all
the way thru between there.
Is the supply voltage of
5V
fed
N0
Check
PC5V
and
(10)
and (27) of
IC6301
?
to pins
(15),
(21) and
9V
fed to
pin (46) of
IC6301
1
PC9V
lines.
YES
Replace
IC6301.
NO
v
Line coupling: Is audio signal outputted at pins (47) and (45) of
IC6301
?
RF coupling
:
Is audio signal outputted at pin (48) of
IC6301
7
X
EE mode
There is
about
1.4
V
at pin (23).
I
1
YES
I
Line coupling
:
Check line ranging from pins (47) and (45) of
IC6301
tothe
audio output terminal.
RF coupling
:
Check line ranging from pin (48) of
IC6301
to the audio input
terminal pin
(2)
of tuner (CNV6301). [VC-MH90 only]
I
Check peripheral parts of 95304
and
9592.
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