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Sanyo VHR-390EX Service Manual page 10

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VI-14212(I) 3/4
2-2-3. ADJUSTMENT
RELAY JIG
Connect the Flat cable end from the Cylinder Ass'y to the
VP-1 PWBAss'yusingthe
Relay jig to provide simple repairing
and adjustment of the VP-1 PWB Ass'y, as shown in Fig. 2.2.7.
Further, when adjusting the VP-1 PWB Ass'y, be sure to make
contact an end of Shield case with Bracket of the VP-1 PWB
Ass'yto maintain the shield effect. If the VP-1 PWB Ass'y does
not contact, there is insufficient ground and no proper play
back image can be obtained.
WPV-T
Rel
Flat
Cyli
Ass
NOTES:
Self-recording
means "Record the video signal and play
back the just-recorded portion=.
Connect the monitor TV to the VIDEO OUTPUT terminal
(EURO-AVI
terminal
pin 19), before making following
adjustments.
ASO HIGH button to the OFF position.
2-2-4. AGC LEVEL ADJ.
Measuring Point
Measuring Equipment
AIM. Condition
TP102
Color bar generator
E-E mode
Oscilloscope
(10:1 probe)
ADJ. Location
ADJ. Value
VRI02 (AGC)
0.5 Vp-p t 0.025 Vp-p
1.
Connect the color bar generator
to the VIDEO INPUT
terminal (EURO-AVI
pin20).
2.
Adjust VRI02 (AGC) for O.5Vp-pt
0,025 Vppasshown
in
Fig. 2.2.8.
WPV-AGC
100'7.
white
0.5
Fig. 2.2.8
2-2-5. PB-Y LEVEL ADJ.
Measuring Point
Measuring Equipment
ADJ. Condition
TPIOI
Oscilloscope
PLAY(SP)mode
Test tape
(VHJ-0008
or
vHJ-0023)
I
I
ADJ. Location
ADJ. Value
VRIOI (PB-Y)
1 Vp-p k 0.05
Vp-p
1.
Play back a test tape
in
SP mode.
2.
Adjust VR1OI (PB-Y) for the video luminance signal level
of 1 Vp-p t 0.05 Vp-p. (Refer to Fig. 2.2.9)
I
b
.
ti
Fig. 2.2.9
I
2-2-6. CARRIER SET ADJ.
~
Measuring Point
Measuring Equipment
ADJ. Condition
1
ADJ. Location
ADJ. Value
I VRI03 (CAR)
I 3.83 MHz*
0.05 MHz
I
1.
Connect the color bar generator
to the VIDEO INPUT
_
terminal (EURO-AVI
pin 20).
2.
After removing the first color bar signal input from
the
video input terminal, immediately
adjust VRI03 (CAR) so
that the frequency becomes 3.83 MHz f 0.05 MHz.
2-2-7. VCO (on screen aasiet) ADJ.
~
Measuring Point
Measuring Equipment
ADJ, Condition
I
I
ADJ. Location
ADJ, Value
CT120 (VCO)
2.5 Vp-p * 0.3 VP-P
1.
Connect the digital voltmeter
(DC range) to TP120 and
GND.
2.
Adjust CT120 (VCO) so that the voltage is 2.5 V * 0.3 V.
e
–1
o–

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