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Check point
Normal voltage and waveforms
JX-W9
Adjusting point and defect
10.Negative/
positive opera-
tion is incorrect.
Mode:
Effect
Color;
Y~ B
Wipe Operation:
Matte
(Source signal _
is normal.)
@
Emitter of Q35
in PAINT
Emitter of Q32
Emitter of Q35
IC39
pin13
pin 11
When NEGATIVE
is OFF,
Emitter of Q60
COLORIZE ON
for Effect.
Emitter of Q62
0.31 V
* Set the Color to W or BK.
White
100 %
level
0.90 Vj.
cs
LEVEL:
MAX
wf
LEVEL: MIN
|
zi
—
NO:
@ Check the voltages and waveforms of
Q34, 1C53 input/output pins 2,1.
@ With the "Switching Truth Table',
check gate 41 (pin 13).
: @Check
@).
© Check voltages and waveforms of
all sections of O26 ~ 29.
@ Check clamp circuit with 1C48 input/
output pins 4, 3,and gate pin 5.
: @Check @.
® Readjust VR23.
Set IC39 pin 13 to 3.5 V.
Incorrectly adjusted > Check @).
Check the output of Q32, 1C39 pins
6, 5, and 4.
: @Check @.
Pin13:
DC 3.5 V
Pin 11:
DC 5.1 V (low) ~
4.1 V (high)
LEVEL: MAX
se sofas
LEVEL:
MIN
Adjust VR24,
* Set the COLOR to W or BK.
White
100 %
level
0.31 V
Adjust VR16 ~ 19
@ Check input/output voltages of 3-pin
regulator IC18,
@ Check voltages and waveforms of all
sections of 1C36, Q30.
LEVEL control knob VR22 is defective.
© Check voltages and waveforms of all
sections of O33 ~ 35.
© Check voltages and waveforms of IC53
in/out pins 9, 8.
With the "Switching Truth Table'',
check gate No. 42 (pin 6).
: @Check @.
ary
® Check all voltages and waveforms of
1C72, Q36, Q37.
@ Check the clamp circuit consisting of
1C42 in/out pins 3, 4 and gate pin 5.
@ Check the voltage at |C42 in/out pins
10 and 11.
© According to the "Switching Truth
Table'', check gate No. 45 (pin 12).
: @Check @).
Set-up voltage
Adjust set-up voltage with VR30.
© Check clamp circuit consisting of IC9
in/out pins 8, 9 and gate pin 6.
© Check all voltages and waveforms of
Q59, 61.
Check voltages and waveforms of ICQ
in/out pins 10 and 11, and check gate
no. 47 (pin 12) according to "Switching
Truth Table'.
(No. 70053) 13
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