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JX-W9
Check point
Normal voltage and waveforms
Adjusting point and defect
1C28 Pin 1 (B-Y)
Polarity (+)
® Check Q80 ~ O82.
Pin 24 (R-Y)
® Check Voltage and waveforms in the
ba
| |
vicinity of 15 ~ Q21,
@ V10 is incorrectly adjusted.
: @Check
@ .
Polarity (-)
Outputs at each pin of S19
(Color SW) (Voltage ''a'')
(+) 110 mV
(-) 470 mV
(+) 600 mV
(~) 100 mV
C39
(1C41 Pin 1)
NO:
eCheck
voltages and waveforms at each
pin of [C28.
Carrier
balance
(VR6,
VR8)
is incor-
rectly adjusted.
@ Check
voltages
and waveforms
in the
vicinity of Q25.
Check item 10~ 13 in ''Adjustment Pro-
cedures'.
: @Check @.
Levels at each pin of S19
(Color SW). (Voltage ''a'"')
Emitter of Q35
Emitter of Q14
@ Check 1C41 pin 13 and gate no. 37 ac-
cording to "Switching truth table".
e Check Q22, Q35.and Q34.
@ Check 1C53 pin 12 and gate no. 40 ac-
cording to "Switching truth table'.
@ Check voltage and waveform of Q19,
asi.
8. Chroma level of
Effect side is
abnormal,
@ Re-check VR3in @ .
(Source side is
: @Check @.
normal.)
Color:
Y~B
White 100 %
Q35.
Effect mode:
level
@ Check voltage and waveform of IC 41
Colorize
0.22 V
in/out pins 9 and 8.
Emitter of Q35
YES:
eCheck the clamp circuit with 142 gate
pin 5, input/output pins 3, 4.
@ Check voltages and waveforms of Q60,
Q61.
e Check connecter CN12-1 and lead wires.
In COLORIZE
Emitter of Q35
White 100 %
level
@With the "Switching Truth Table",
check gate 39.
9. Luminance level
of Effect side is
abnormal.
0.22 V
© Check the vicinity of Q34.
(Source signal
: @Check @).
is normal.)
White 100 %
level
Color:
Y ~B
Wipe operation:
Matte
12 (No. 70053)
Emitter of Q31
0.60 V
Adjust VR15.
YES:
vicinity of Q18, Q31.
@Check @.
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