Panasonic AJ-D610WBp, Service Manual

Page: 82 / 363

ELE-26
5-3. R,G,B TEST Signal Level
Adjustment
BOARD PRE PROCESS, SYNC
TP
TP102[R] (PRE PROCESS)
TP302[G] (PRE PROCESS)
TP502[B] (PRE PROCESS)
TP3206[HD] (SYNC)
ADJUST
VR3505[TEST R] (SYNC)
VR3506[TEST G] (SYNC)
VR3507[TEST B] (SYNC)
EVR
F.NUMBER Internal TEST Ramp Signal
MODE -
M. EQ. Oscilloscope
SPEC. A = 666 +/- 10mVp-p
1. Set the
EVR
as shown below.
COM:[1E] DATA:[22] ADR:[00] [Enter]
(GAIN L:0dB, KNEE:OFF, TEST PULSE:ON)
2. Connect a scope to TP3206 (SYNC Board) as
trigger.
3. Connect a scope to TP102 and adjust VR3505 so
that the level A is in the specification.
4. Connect a scope to TP302 and adjust VR3506 so
that the level A is in the specification.
5. Connect a scope to TP502 and adjust VR3507 so
that the level A is in the specification.
5-4. R,G,B AD Input Level
Adjustment
BOARD PRE PROCESS
TP
VIDEO OUT
( 75 ohm termination)
ADJUST
VR105[R AD]
VR305[G AD]
VR505[B AD]
EVR
F.NUMBER Internal TEST Ramp signal
MODE -
M. EQ. WFM
SPEC.
A portion is flat.
1. Set A. KNEE to OFF.
2. Set
the EVR and select R channel.
COM:[1E] DATA:[23] ADR:[00] [Enter]
(GAIN L:9dB, MANUAL KNEE SLOPE:25,
TEST PULSE:ON, MONI OUT SEL:R)
3. Connect a Waveform monitor to the VIDEO OUT
and adjust VR105 so that the A portion is flat.
When adjust VR105 , the level should be as
smooth as possible while A portion is flat.
4. Set the EVR as shown below and select G
channel.
COM:[1E] DATA:[24] ADR:[00] [Enter]
(GAIN L:9dB, MANUAL KNEE SLOPE:25,
TEST PULSE:ON, MONI OUT SEL:G)
5. Connect a Waveform monitor to the
VIDEO OUT
and adjust VR305 so that the "A" portion is flat.
6. Set the EVR as shown below and select B
channel.
COM:[1E] DATA:[25] ADR:[00] [Enter]
(GAIN L:9dB, MANUAL KNEE SLOPE:25,
TEST PULSE:ON, MONI OUT SEL:B)
7. Connect a Waveform monitor to the VIDEO OUT
and adjust
VR505
so that the "A" portion is flat.
8. Confirm that the RGB signal is the same level and
waveform shape. (Vector dot should be at origin of
the vector scope.)
A
BLK
BLK
TP102:R
TP302:G
TP502:B
A
O K
A
N G
Step