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Sanyo VHR-420 Service Manual page 10

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V1.14B29(N)
3/4
Notes:
Connect the monitor
TV to the VIDEO OUTPUT terminal,
before making following
adjustments.
.
Self-recording
means 'Record
the video signal and play
back the just-recorded
portion".
2-2-4. AGC
LEVEL ADJ.
~
Measuring
Point Measuring Equipment
ADJ, Condition
I
ADJ. Location
I
ADJ. Value
VRI02 (AGC)
0.5 Vp-p k 0.025 VP-p
1.
Connect
the color
bar generator
to the VIDEO INPUT
terminal.
2.
Adjust VR102 (AGC) for 0.5 VP-P f 0.025 VP-P as shown
in Fig. 2.2.6.
WPV-AGC
100% \Vhite
L
4
0.5 VP-p * 0.025 Vp-P
Lr
,
,
Fig.
2.2.6
1
2-2-5.
PB-Y LEVEL ADJ.
Measuring Point
Measuring
Equipment
ADJ. Condition
TP101
Oscilloscope
PIAY mode
(Video Out)
(10:1 probe)
Alignment
tape
(VHJ-0008 or
VHJ-0023)
AlXl. Location
ADJ. Value
VRIO1 (PB-Y)
1 Vp-p * 0.05 Vp-p
1.
Terminate
the VIDEO OUTPUT
terminal
with
a 75!2
resistor.
2.
Adjust VRIO1 (PB-Y) for the video iuminance
si9nal level
Of 1 vp-pt
0.05
VP-P.
(Refer to Fig. 2.2.7)
WPV.PBY
White
1
Vp-p
*
2-2-6. CARRIER SET ADJ.
Measuring
Point
Measuring
Equipment
ADJ, Condition
TPI03
\ Color bar generator
IREC mode
I
Frequency
counter
I
J
ADJ.
Location
I
ADJ. Value
I
VRI03 (CAR)
3.83 MHz * 0.05 MHz
I@
.,
.,.
1.
Connect
the color
bar generator
to the VIDEO INPUT
terminal.
2,
After removing
the first color bar signal input from
the
video input terminal,
immediately
adjust VR103 (CAR) so
that the frequency
becomes
3.83 MHz + 0.05 MHz.
2-2-7. DEVIATION
ADJ.
~
Measuring Point Measuring Equipment
ADJ. Condition
I
I
I
ADJ.
Location
ADJ, Value
i
1
VRI04 (DEV)
1 Vp-p i 0.05 Vp-p
1.
Record the color bar signal on the blank tape.
e
2.
Play back the just-recorded
portion.
3.
Adjust VRI04
(DEV) for
1 Vp-p t 0.05 Vp-p
as shown in
Fig. 2.2.8.
4.
If the adjustment
value is not satisfactory,
adjust VR104
(DEV) and repeat steps 2 to 3.
WPV-DEV
..... ... . .
~Y-lH+"
Fig.
2.2.8
–1
o–

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