FLOW CHART NO.18 E-E MODE TROUBLESHOOTING
I
No E-E signal.
(Tuner input mode.)
(Ext. input mode.)
I
I
Is
there a signal at pin (29) of
lC281?
I
I
Istlere
a signal at pin
(31)
of
ICZOl?
T:
‘ES
I
NO
I
PWB
?
Check IF
PWB
and partsaround it.
Check between Ext. inputterminal
I
andthewayupthrutdpin(31)of
IC201.
I
Is there a signal at Ext. input
terminal?
Check Ext. input terminal and
parts around it.
Is there a signal at pin (27) of
IC2017
Is the supply voltage of
5V
NO
fed to pins (26) and (54) of
Check
PCSV
lines.
IC201?
YES
Are there the serial data
NO
Check between pins
(14)
and clockat pins (14) and
--f
and
(“)
Of
lcZol
and
the
(15)
of
ICZOl?
way up thru to pins
(1)
and
(2) of
IC701.
FLOW CHART NO.19
RECORDMG
MODE (LUMINANCE) TROUBLESHOOTING
Recording is not possible. (E-E mode is possible.)
I
NO
Check parts around pins
(38).
(39).
(47) and (48) of
lC20
1.
NO
Check partsaround pin
(50)
of
IC201.
connector?
YES
Check R224
(REC
FM level control).
YES
Check peripheral circuit of
4282
and Bias
CTL
8V
line.
(27) of
IC301?
w
Check between pin (10) of AX
connector and all the way up thru
YES
to pin (25) and pin (27) of IC301.
Are there specified recording-
NO
mode signals at pins (5) and
(9)
of
Check BIAS CTL 8V line.
XC connector?
I
1
YES
Check upper and lower drum.
Replace
IC201.
To Next Page
Loading...
