Sanyo VHR-240 series Service Manual page 7

3513V11(N)
2-3. VIDEO CIRCUIT ADJUSTMENT
"
Use the Relay jig mentioned in the 2-1. PREPARATION to provide simple adjustment of the Video Pre-amp unit.
o Before these adjustments place the unit in the SP mode.
- Unless otherwise specified, alltest point and adjustment location on the CP-1 board.
Item
AGC
LEVEL
PB-Y
LEVEL
CARRIER
SET
DEVIATION
Input
Colour bar
100% white
level)
from
Colour bar
generator
Alignment
cassette
[VHJ-0008
VHJ:b23)
Colour bar
100% white
level) from
Colour bar
generator
1
No-signal
Colour bar
100% white
level)
from
Colour bar
generator
Mode
E-E
PLAY
REC
REC
(Adjust-
ment)
i
PIAY
(Check)
Point
TP102
VIDEO
OUTPUT
TP101
TPI 03
VIDEO
OUTPUT
TP101
Location
VR102
VR101
VR103
VR104
Remark
-100% white
w25v03(
J'54E!,*
u____._i
1. Terminate VIDEO OUTPUT terminal with a
75 ohms.
2. Adjust VRI 02 so that the level is 0.50*
0.025 Vp-p.
W25VC0
~1 00% white
* 0.05
v,-,
1. Terminate VIDEO OUTPUT terminal with a
75 ohms.
2. Adjust VR101 so that the level is 1.00 *
0.05
Vp-p.
1.
2.
3.
Input the PAL colour bar signal to VIDEO
INPUT terminal.
Set the channel selector buttons to the 8'AV'
position and put the VCR in the REC mode.
After removing the first colour bar signal
input from the video input terminal, imme-
diately adjust VR103 so that the frequency
becomes 3.83 * 0.05 MHz.
- 100% white
* 0.05 v,-,
1. Terminate VIDEO OUTPUT terminal with a
75 ohms.
2. Insert the blank tape to the VCR and record
colour bar signal.
3. Playback the recorded part, and check that
the level is 1.00* 0.05 Vp-p.
4. If the adjustment value is not satisfactory,
adjust VR104 and repeat step 3.
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