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Is there a signal at pin (17)
NO
Is there 5V at pin (16) of
NO
of IC301 ?
Is there asignal atpin(51)
{NO
of IC401 ?
Is there a signal at pins (39)
{NO
FLOW CHART NO.22 PLAYBACK MODE (LUMINANCE) TROUBLESHOOTING
YES
YES
and (38) of |C401 ?
Is there a signal at pin (35)
| NO
of 1C401 ?
is there asignal at pin(27) | YES
of IC401?
YES
YES
NO
Ptayback is not possible.
1¢301?
Check TU PC5V fine.
YES
Is there H.SW.P. at pin (20)
NO
of C301?
Check H.SW.P. line.
< m
""
Replace C301.
Check between pin (17) of IC301 and all the way up thru to pin
(51) of C401.
Check serial data and clock at pins (14) and (15) of 1C401.
Check between pin (36) and ail the way up thru to pin (35) of
(C401 ?
Check between pin (27) of 1C401 and all the way up thru to video
output terminal.
Replace IC401.
Is there a signal at pin (19) iC301 ?
2 °o
ls there a signal at pin (53) of IC401 ?
!s there a signal at pin (56) of IC401 ?
z °o
Is there a signal at pin (19) of IC401 ?
ts there a signai at pin (23) of C401 ?
|
ni v
= z —)
°
is there a chroma signal at pin(27) of + |NO
ICA04 ?
FLOW CHART NO.23 PLAYBACK MODE (CHROMA) TROUBLESHOOTING
YES
YES
YES
YES
Playback is possible but without colour.
Replace C301.
NO
Check between pin (19) of 1C301 and
all the way up thru to pin (53) of
1€401.
Check between pin (55) and all the
way up thru to pin (56) of IC401.
Check peripheral circuits of X501.
Check between pin (19) of 10401 and
the way up thru to pin (23) of IC401.
Replace |C401.
FLOW CHART NO.24 Hi-Fi TROUBLESHOOTING (1)
No Hi-Fi E-E sound heard
Audio signal input from tuner.
Check line betw-
een
NICAM or IGR
Decoder circuit and
the Hi-Fi circuit.
\s audio signal
inputted to pins (2)
{L - CH] and (35) [R-
CH] of iC6301 ?
Is audio signal
inputted to pin (3)
or (4) (L-CH) and
(34) or (33) (R-CH)
of 1C6301 ?
Are serial data and serial clock at | NO
Check 1C6301 and IC701, and all
pins (18) and (16) of 1C6301 ?
the way thru between there.
YES
ts audio signal inputted at pins
NO
rade festa oat
(10) and (27) of IC6301 ?
1C6301?
YES
NO
Line coupling: Is audio signal outputted at pins (47) and (45) of 1C6301 ?
RF coupling
: Is audio signal outputted at pin (48) of IC6301 ?
XX Audio signal output mode selection.
Pin (23) of 1C6301.
LH
NORMAL
YES
Line coupling : Check line ranging from pins (47) and (45) of iC6301 to the
audio output terminal.
: Check line ranging from pin (48) of IC6301 to the audio input
terminal pins (5) of tuner (TU1501).
RF coupling
Line Audio signal input.
Check 1 line and 2
between the audio
input terminal and
Hi-Fi circuit.
NO
Check TU PC 5V
line.
Replace 1C6301.
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