Sanyo VHR-450 Service Manual page 11

V1-14SOO(N) 4/4
2-2-8. C REC CURRENT ADJ.
b
Measuring Point Measuring Equipment ADJ. Condition
TP181
Color bar generator REC (SP) mode
(on VP-1 PWB)
Oscilloscope Blank tape
(1:1 probe)
ADJ. Location ADJ. Valua
VR181 (REC-C)
150 mVp-p t 5 mVp-p
1. Connect the ground of the oscilloscopeto the shield 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 * 5 mVpp.
(Refer to Fig. 2.2.9)
WVCREC
-
150 mVp-p
I
Fig.2.2.9
2-2-9. Y REC CURRENT ADJ.
Measuring Point Maasuring Equipment
ADJ. Condition
TP181 Color bar generator REC (SP) mode
(on VP-1 PWB) Oscilloscope Blank tape
(1:1 probe)
ADJ. Location
AW.
Value
VR182 (REC-Y) 480 mVp-p k 20 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 480
mVp-p * 20 mVp-p. (Refer to
Fig. 2.2.10)
-YREC
mVp
-P
Syr!c Tip
Fig. 2.2.10
2-2-Io. VCO (on screen aaaist) ADJ.
Measuring Point Measuring Equipment AW.
Condition
TP120
Color bar generator
E-E mode
Digital voltmeter
AW.
Location
AW.
Value
CT120 (VCO) 2.5 V* 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 t 0.3 V.
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