25
VL-WD250S/H/E
VL-WD450S/H/E
1. PLL VCO adjustment
Mode
VCR ADJ mode
Procedure
1) Playback the alignment tape (or a self-recorded tape).
2) Call the adjustment mode (V-ADJ).
3) Set the address "2A" and call the data.
4) Set the called data with the FF/REW key to the point where the playback screen appears.
(At this time, the screen full of block noise is OK.)
Examples
• During E
2
PROM replacement. • During circuit board (Main) replacement.
ADJUSTING THE ELECTROMAGNETIC CONVERSION CIRCUIT SYSTEM
2. Phase and equalizer adjustment
→
(Performed in the VCR mode)
Mode
VCR ADJ mode
Procedure
1) Load a self-recorded tape into the deck.
2) After playback for 3 minutes, select the test mode 0F using the remote control for adjustment to start the
automatic adjustment. (The following sequence is automatically performed.)
3) Error rate check
Select and fix the TEST MODE 0B on the adjustment remote control.
4) Manual adjustment method (video adjustment mode)
* Perform this adjustment with the self-recording/playback in the LP mode.
For phase, vary the data for the address 26 and 2B, and for equalizer, vary the data for the address 25 and 27,
to set the error rate is made as small as possible.
Examples
• During mechanism replacement. • During circuit board (Main) replacement. • During E
2
PROM replacement.
Tape is EJECT.
The built-in VI/O
colour bar is recorded.
VS REW
PB
Phase and
equalizer are
adjusted
automatically.
Judgment
OK:
Blue LCD comes on.
NG:
Red LCD comes on.
Synchronization error
Error rate
H
L
Phase
Equalizer
H ch side
2B
27
L ch side
26
25
Synchronization error
20 or less
Error rate
200 or less (SP Mode)
330 or less (LP Mode)
ADJUSTING THE VIDEO I/O CIRCUIT SYSTEM
(Wiring board diagram: Main Side B)
1. PCO D/A-Y adjustment
Test point
TL5004 (connected to oscilloscope)
Mode
EE mode
Procedure
1) Connect the AVS cable and then connect it to the monitor (TO).
2) Call the adjustment mode (V-ADJ).
3) Set the address to "22", and call the date.
(100% white signal is output.)
4) Vary the date with the FF and REW keys to set the signal appearing at TL5004 to 1.0Vp-p
±
0.05Vp-p.
Examples
• During E
2
PROM replacement. • During IC4401 replacement. • During IC1401 replacement.
1.0
±
0.05
R1716
C1719
C1721
TL1913
R1712
TL1703
C1722
R1722
C1723
C1727
TL1926
TL1934
C1726
R1715
TL1704
C1725
C1902
SC900
C1724
TL1916
C1720
C1718
TL17
0
T
T
T
T
T
T
T
T
R
R
C
R
R
R1451
C1704
L170
C171
C171
C1416
C1717
C1714
R1452
C1418
C1703
C1417
R1421
R1461
R1462
R1729
R1730
R1705
R1706
IC1701
R1731
R1732
R5005
TL5022
C1715
C1702
C1713
C1701
C1709
C1707
C1716
TL1705
C1706
TL1947
C1705
C1711
L1701
TL1948
TL1949
TL1950
SC5001
TL5011
TL5021
TL5019
TL5017
TL5016
R5006
R1414
R1419
R5007
C1439
R1402
R1413
C1412
C1406
C1407
C1411
IC1431
Q1405
D1403
R1408
C1438
C1440
R1415
IC1401
TL143
1
R144
2
C1409
C1404
C
R
1
Q1432
C14
3
R1441
C1434
C1433
R1433
R1435
R1434
R1437
R1403
C1435
R1436
R1404
Q1433
TL202
TL203
C208
L1431
C1431
Q1431
R1453
R1401
TL1410 R5004
R5003
C1441
TL5002
TL5004
L1404
TL5001
TL5007
TL5006
TL1951
TL5110
TL1924
TL5115
TL5135
TL5013
TL5008
TL5114
TL5101
TL5009
TL5010
TL5140
TL5118
TL5107
TL5012
TL5106
TL5105
TL5109
TL5015
TL5111
TL5112
TL5113
TL5108
TL5104
TL5103
TL5102
TL5120
TL5121
TL5123
TL5119
TL5130
TL5122
TL5124
TL5126
TL5137
TL5139
TL5134
TL5131
TL5133
TL5132
B35
C1415
C1402
L1402
C210
C207
R201
C213
C211
R211
R202
R212
R216
R214
R213
TL5128
TL5125
TL5004
PCO D/A-Y
TL5002
PCO D/A-C
Содержание ViewCam VL-WD250E
Страница 49: ...49 VL WD250S H E VL WD450S H E M E M O ...
Страница 88: ...123 VL WD250S H E VL WD450S H E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Wiring Side SIDE A ...
Страница 90: ...125 VL WD250S H E VL WD450S H E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Wiring Side SIDE B ...
Страница 96: ...131 VL WD250S H E VL WD450S H E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Wiring Side SIDE A ...
Страница 98: ...133 VL WD250S H E VL WD450S H E Wiring Side SIDE B A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...
Страница 106: ...141 VL WD250S H E VL WD450S H E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Wiring Side SIDE A ...
Страница 108: ...143 VL WD250S H E VL WD450S H E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Wiring Side SIDE B ...
Страница 110: ...145 VL WD250S H E VL WD450S H E Wiring Side SIDE A A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...
Страница 111: ...146 VL WD250S H E VL WD450S H E A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Wiring Side SIDE B ...
Страница 138: ...Ref No Part No Description Code Ref No Part No Description Code 173 VL WD250S H E VL WD450S H E ...