Vco Lock-In Range Adjustment - Sony DNW-A100 Maintenance Manual
Digital video hybrid recorder
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3-8. Analog Betacam PB System Alignment
3-8-20. VCO Lock-in Range Adjustment
3-8-20. VCO Lock-in Range Adjustment
Preparing tools
. Oscilloscope:
TEKTRONIX 2465B or equivalent
. Extension harness: 14P
. Extension board: EX-377 (Part No. J-6269-810-A)
. Alignment tape
For NTSC:
CR5-1B (Part No. 8-960-096-41)
For PAL:
CR5-1B PS (Part No. 8-960-096-91)
Preparation
1. Extend the TBC-24 board with an extension
board EX-377 and an extension harness.
n
Before removing TBC-24 board, wait for more than 30
seconds after turning off the POWER switch.
2. Check the setting on the upper control panel.
REMOTE/LOCAL
3. Check the setting on the sub control panel.
KEY INHIBIT switch 8 OFF
4. Check that the equipment has warmed up.
Before starting the adjustment, warm up the VTR and
oscilloscope through the power for 20 minutes or more.
A
B
C
TP201
E200
RV500
TP203
RV200
RV501
LOT No.
S No.
A No.
RV201
RV202
TP202
E501
TP500
TP601
RV503
TP602
TP604
TP606
RV502
TP603
RV601
LV601
RV604
TP605
TP303
TBC-24 Board (Side A) (Suffix-11 and-12)
3-94
(Part No. 1-952-684-11)
8 LOCAL (unlit 9P)
D
E
F
G
TBC-24
RV300
RV101
TP101
TP103
RV102
E100
TP102
RV400
RV402
TP300
TP401
TP400
E302
RV303
TP403
TP404
TP402
TP301
TP406
RV404
LV401
E301
RV401
TP302
TP405
E502
Adjustment
1. In the TBC-24 board of board number suffix -11 or -
12, set the following RVs on the TBC-24 board to
each specified position as shown figure below.
45d
RV404 (G-6)
2. Connect and set the oscilloscope as follows:
CH-1: TP403/TBC-24(G-5), DC 1 V/DIV
GND: E301/TBC-24(G-6)
CH-2: TP603/TBC-24(C-6), DC 1 V/DIV
GND: E502/TBC-24(D-6)
3. During play back the alignment tape in PLAY mode,
adjust each DC level of Y and C.
PB portion:
Color-bar signal (14:00 to 17:00) of
CR5-1B (NTSC) / CR5-1B PS (PAL)
Adj. points:
Y (CH-1): 1LV401/TBC-24(F-6)
C (CH-2): 1LV601/TBC-24(B-6)
Specification: 2.0 ± 0.2 V dc
4. Stop the playback of the alignment tape.
n
It is not necessary to eject the alignment tape when
perform subsequent "3-8-21. TBC VCO Free-running
Adjustment".
A
B
RV500
RV201
RV501
TP203
1
A No.
2
3
E501
TP500
TP601
4
5
RV503
TP602
TP604
RV502
TP603
LV601
6
7
TBC-24 Board (Side A) (Suffix-13 and Higher)
45d
RV606 (B-6)
C
D
E
F
TBC-24
TP201
RV504
RV300
E200
RV101
TP101
LOT No.
S No.
E100
RV400
RV402
TP300
TP401
E302
RV303
TP606
TP404
TP402
RV601
LV401
RV401
E502
TP405
TP605
TP303
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
G
TP103
1
2
3
4
5
TP403
TP406
E301
6
7
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