Sony Betacam SX DNW-A100 Maintenance Manual page 366

6-9. VPR-17 Board Replacement
Perform following steps (18) through (21) only when the specification in step (17) is not satisfied.
(18) Enter A20 : VPR VR of the maintenance mode.
(19) Add/subtract 1 to/from the data value of "REF 1ST FLD DET".
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The data increase/decrease is dependent on the angles A and B measured in steps (12) and (15).
A > B : Subtract 1 from the data value.
(Turn the search dial to REVERSE direction while pressing the JOG button.)
A < B : Add 1 to the data value.
(Turn the search dial to FORWARD direction while pressing the JOG button.)
(20) To exit A20 : VPR VR, press the MENU button once.
(21) Return to step (11).
Perform following steps (22) through (24) only when REF 1ST FLD DET's data value is changed.
(22) Data save
Enter A2F : NV-RAM CONTROL, then execute "SAVE ALL ADJUST DATA".
(23) Check that the message "Save Complete" is displayed on the video monitor.
(24) To exit A2F : NV-RAM CONTROL, press the MENU button once.
6. Internal 4fsc Frequency Adjustment
Measuring equipment: Frequency counter
(1) Supply no signal to REF. VIDEO connector.
(2) Connect the frequency counter to TP501(A-1) on the VPR-17 board. GND: E500/VPR-17(A-5)
(3) Enter A20 : VPR VR of the maintenance mode.
(4) Adjust frequency as follows:
Adjustment point: A20 : VPR VR : INT 4FSC FREQ
14,318,181 ± 50 Hz for DNW-A100/A50/A45
Specification:
17,734,476 ± 50 Hz for DNW-A100P/A50P/A45P
(5) To exit A20 : VPR VR, press the MENU button once.
(6) Data save
Enter A2F : NV-RAM CONTROL, then execute "SAVE ALL ADJUST DATA".
(7) Check that the message "Save Complete" is displayed on the video monitor.
(8) To exit the maintenance mode, press the MENU button three times.
A B C D E F
TP501
TP502
E500
TP700 TP701
TP500
6-128
G H J K L
E501
E100
E101
VPR-17 Board (Side A)
VPR-17
M R S T U
A No.
P
N
E300
TP402 TP401
E400
V W X Y
1
2
3
4
5
6
7
8
TP400 TP405 TP404 TP403
9
E401
10
11
12
DNW-A100/A50/A45
DNW-A100P/A50P/A45P