Sanyo VHR-490 Service Manual page 11

v1-14805(N) 4/4
2-2-8. C REC CURRENT ADJ.
Measuring Point
Measuring Equipment ADJ. Condition
TP181
Color bar generator REC (SP) mode
(on VP-1 PWB)
Oscilloscope Blank tape
(1:1 probe)
ALU Location
ADJ. Value
VR181 (REC-C)
150 mVp-p * 5 mVp-p
1. Connect the ground of the oscilloscope totheshield case
of the VP-1 PWB assembly.
2. Adjust VR182 (REC-Y) for the minimum video luminance
signal level.
3. Adjust VR181 (REC-C) so that the video chrominance
signal level is 150 mVpp f 5 mVp-p. (Refer to Fig. 2.2.9)
WWCREC
150 mVp-p
Fig. 2.2.9
2-2-9. Y REC CURRENT ADJ.
Measuring Point
Measuring Equipment
TP181
Color bar generator
(on W-1 PwB)
Oscilloscope
(1: 1 probe)
,
ALU Condition
Recode
Blank tape
L
I
ADJ. Location
I
AIXL Value
VR182 (REC-Y) 470 mVp-p * 10 mVp-p
1.
2.
Connect the ground of the oscilloscope to the shield case
of the VP-1 PWB assembly.
Adjust VR182 (REC-Y) so that the video luminance signal
level at the sync tip is 470 mVp-p * 10 mVp-p. (Refer to
Fig. 2.2.10)
-YREC
mVp-p
Sy~c Tip
Fig. 2.2.10
2-2-10. VCO (on screen assist) ADJ.
1 I
I
(
Measuring Point Measuring Equipment ADJ. Condition
TP120 Color bar generator
E-E mode
Digital voltmeter
ADJ. Location
ADJ. Value
CT120 (VCO) 2.5 Vk 0.3 V
1. Connect the digital voltmeter (DC range) to TP120 and
GND.
2. Adjust CT120 (VCO) so that the voltage is 2,5 V 10.3 V.
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