31
F. PLAYBACK PHASE ADJUSTMENT (See Fig. 5-6)
Phase generator (PG) shifter decides the VIDEO HEAD switching point when a TAPE is played back.
In case the Phase generator (PG) shifter isn't correctly tuned, HEAD switching noise or vertical jitter may
occur.
a. Connect the PATH ADJ. FIXTURE to PT01 of the MAIN CIRCUIT BOARD.
b. Play the ALIGNMENT TAPE (COLOR BAR SIGNAL OR MONOSCOPE SIGNAL)
c. Connect the channel-1 scope probe to the S/W PULSE TEST PIN of the PATH ADJ. FIXTURE.
d. Connect the channel-2 scope probe(1V/div.) to the VIDEO OUT of the MAIN CIRCUIT BOARD.
e. Play back the ALIGNMENT TAPE.
f. Adjust the PG volume for time interval of 6.5H±0.5H between switching pulse and V-sync signal.
TEST POINTS
S/W PULSE TEST PIN
PATH ADJ. FIXTURE
VIDEO OUT
MAIN CIRCUIT BOARD
MEASURING EQUIPMENT
OSCILLOSCOPE
ADJUSTMENT
VR595 (PG SHIFTER)
MAIN CIRCUIT BOARD
Fig. 5-6 PLAYBACK PHASE ADJUSTMENT
Содержание VX-14MW1E
Страница 5: ...CIRCUIT BLOCK DIAGRAM 4 ...
Страница 12: ...SCHEMATIC DIAGRAM 11 ...
Страница 13: ...SCHEMATIC DIAGRAM 12 ...
Страница 14: ...EXPLODED VIEW 13 1 VX 14R7 ...
Страница 15: ...EXPLODED VIEW 14 2 VX 21R7 ...
Страница 16: ...PRINTED CIRCUIT BOARD 15 1 MAIN PCB ...
Страница 21: ...PRINTED CIRCUIT BOARD 20 2 POWER PCB ...
Страница 22: ...PRINTED CIRCUIT BOARD 21 3 IF PCB ...
Страница 35: ...Technical Service Guide VCR MECHANISM UNIT K30 MECHA DECK SONY Corporation ...
Страница 38: ...3 1 2 1 WIRE DIAGRAM 1 2WIREDIAGRAM ...
Страница 42: ...7 2 1 2 PARTS LOCATION OF FRONT LOADING ASS Y A TOP VIEW B FRONT VIEW ...
Страница 72: ...37 6 EXPLODEDVIEWANDPARTSLIST 6 1 EXPLODEDVIEWOFDECKASS Y TOPVIEW ...
Страница 73: ...38 6 2 EXPLODEDVIEWOFDECKASS Y BOTTOMVIEW ...
Страница 74: ...39 6 3 EXPLODEDVIEWOFF LASS Y ...
Страница 75: ...40 ...
Страница 80: ...Sony Corporation Home Network Company Osaki West Tec 2 10 Osaki Shinagawa Kv 141 0032 Tokyo Japan ...