3-94
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
3-8-20. VCO Lock-in Range Adjustment
Preparing tools
.
Oscilloscope:
TEKTRONIX 2465B or equivalent
.
Extension harness: 14P
(Part No. 1-952-684-11)
.
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
8
LOCAL (unlit 9P)
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.
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.
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)
Y (CH-1):
1
LV401/TBC-24(F-6)
C (CH-2):
1
LV601/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”.
RV404 (G-6)
45
d
RV606 (B-6)
45
d
TBC-24 Board (Side A) (Suffix-11 and-12)
TBC-24 Board (Side A) (Suffix-13 and Higher)
TBC-24
1-648-542-
MADE IN JAPAN
2
B
1
3
4
5
6
7
A
TP203
RV201
TP101
E501
TP601
E301
A
C
D
E
F
G
A No.
LOT No.
S No.
RV500
RV501
RV300
E200
TP103
E100
RV402
RV400
TP300
TP401
RV303
E302
TP404
RV401
TP403
TP406
TP402
TP405
E502
TP303
TP605
TP606
RV601
TP602
TP603
TP604
RV503
RV502
TP500
TP201
TP202
RV200
RV202
TP102
TP400
TP302
RV102
TP301
RV604
RV101
RV404
LV601
LV401
TBC-24
1-648-542-
MADE IN JAPAN
2
B
1
3
4
5
6
7
A
TP203
RV201
TP201
RV101
TP101
E501
TP601
E301
A
C
D
E
F
G
A No.
LOT No.
S No.
RV500
RV501
RV504
E200
TP103
E100
RV402
RV400
TP300
TP401
RV303
E302
TP404
RV401
TP403
TP406
TP402
TP405
E502
TP303
TP605
TP606
RV601
TP602
TP603
TP604
RV503
RV502
TP500
LV601
LV401
RV300
3-8. Analog Betacam PB System Alignment
3-8-20. VCO Lock-in Range Adjustment