JVC AV-65WP74/HA Service Manual page 60

Rear projection television
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AV-65WP74
Measuring
Item
instrument
RGB CUTOFF
Signal
generator
adjustment
Oscilloscope
Remote
control unit
No signal
Regular mode
screen
Oscilloscope
waveform
1-60 (No.52096)
All manuals and user guides at all-guides.com
Test point
TP-R
[1.PICTURE/SOUND]
S14: CUTOF R
[R CRT
S16: CUTOF G
SOCKET PWB]
S18: CUTOF B
TP-G
[G CRT
R SCREEN VR
SOCKET PWB]
G SCREEN VR
TP-B
B SCREEN VR
[B CRT
[FOCUS PACK]
SOCKET PWB]
TP-E
TP-G
CRT SOCKET PWB
Whole black signal (0%)
Adjustment part
(1) Receive NTSC whole black (0%) signal.
(2) Select STANDARD mode with [VIDEO STATUS]
key.
(3) Select REGULAR mode with [ASPECT] key.
(4) The COLOR TEMP set at the LOW mode.
(5) Connect the oscilloscope to TP-G on the G CRT
SOCKET PWB.
(6) Select 1.PICTURE/SOUND from SERVICE MENU.
(7) Select <S16> (CUTOF G).
(8) Adjust <S16> so that the central 0% signal portion
and the non-signal portion of both sides may
become the same voltage.
(9) Press [MUTING] key and memorize the set value.
(10) Receive 480i component whole black (0%) signal.
(11) Set <S16> data same as memorized NTSC <S16>
data.
(12) Set 1080i component whole black (0%) signal.
(13) Set <S16> data same as memorized NTSC <S16>
data.
(14) Connect the oscilloscope to TP-R <S14> (CUTOF
R) and adjust same manner as for 6. ~ 13. above.
(15) Connect the oscilloscope to TR-B <S18> (CUTOF
B).and adjust same manner as for 6. ~ 13. above.
(16) Adjust SCREEN VR for RGB respectively, so that
the black (3%) becomes faintly whitish.
No signal
NOTE :
If it is difficult to adjust the SCREEN precisely, adjust
the SCREEN VR for one of three colors while
masking other two colors.
0 %
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