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Sanyo VHR-330EV Service Manual page 10

Sanyo video cassette recorder service manual

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V1-14207(1) 314
2-2-3. ADJUSTMENT
RELAY JIG
Connect the Flat cable end from the Cylinder Ass'y to the
VP-1 PWBAss'yusingthe
Relay jigtoprovidesimple
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. lfthe VP-1 PWBAss'ydoes
not contact, there is insufficient ground and no proper play
back image can be obtained.
wPv-TP4/lR
vp-1
PWB
ASS'Y
0
c
\
\
Relay Jig
o
~
%
u
Flat Cabl
~ "
Ass8y
CG
\
Cylinder
00
Fig. 2.2.7
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-AVterminal
pin 19), before making following ad-
justments.
2-2-4.
AGC LEVEL ADJ.
Measuring Point
Measuring Equipment
ADJ. Condition
TPI02
Color bar generator
E-E mode
Oscilloscope
(10:1 probe)
ADJ. Location
ADJ. Value
VRI02(AGC)
0.5 vpp k 0.025vp-P
1.
Connect the color bar generator
to the VIDEO INPUT
terminal (EURO-AV pin20).
2.
Adjust VR102 (AGC) for O.5Vp-pt
0.025 Vp-passhown in
Fig. 2.2.8.
WPV-AGC
100?4.
white
f
I
b
0.5 Vp-p50.025Vp-p
!-r
,
Fig.2.2.8
2-2-5. PB-Y LEVEL ADJ.
Measuring Point
TPIOI
Measuring Equipment
Oscilloscope
ADJ. Condition
PLAY(SP)mode
Test tape
(VHJ-0008
or
VHJ-0023)
1
1
I
ADJ. Location
ADJ. Value
VRIOI (PB-Y)
1 Vp-p f 0.05 Vpp
1.
Play back a test tape in SP mode.
2.
Adjust VRIO1 (PB-Y) for the video luminance signal level
of
1
Vp-p t 0.05 Vp-p. (Refer to Fig. 2.2.9)
WFV109
0%
white
1 Vp-p
1
I
.-k-.--u
u
k---
IH <
.9.2.,.,
2-2-6. CARRIER SET ADJ.
~
Measuring Point
Measuring Equipment ADJ. Condition
I
I
ADJ. Location
ADJ. Value
\ VRI03(CAR)
I 3.83 MHz t 0.05 MHz
\
-
1.
Connect the color bar generator
to the VIDEO INPUT
_
terminal (EURO-AV 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 MHzt 0.05 MHz.
2-2-7.
VCO (on screen assist) ADJ.
MeasuringPoint
Measuring Equipment ADJ. Cond@ion
TP321
Color bar generator
E-E mode
Digital voltmeter
ADJ, Location
ADJ. Value
CT321(VCO)
2.5 VP-P k 0.3 vpP
1.
Connect the digital voltmeter
(DC range) to TP321 and
GND.
2.
Adjust CT321 (VCO) so that the voltage is 2.5 V t 0.3 V.
-
-lo–

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