Board Replacement; Replacement Procedure - Sony Betacam SX DNW-A100 Maintenance Manual

6-4. DM-89 Board Replacement
The electrical adjustments are essential after the DM-89 board is replaced.
To perform the electrical adjustments, the following equipment and fixtures are required.
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The DM-89 board of the service parts code suffix-A cannot be used to this unit. Some setting data are
different according to the board number suffix (XX of 1-648-541-XX) of DM-89 board.
Be sure to check the suffixes of service parts code and board number before replacement. The service
parts code is indicated on near the top right corner (G-1) of side A of DM-89 board, and the board number
is indicated on the left margin (A-6) of side A.
. Composite video signal generator
For DNW-A100/A50/A45:
For DNW-A100P/A50P/A45P:
. Component waveform monitor:
. Oscilloscope:
. Spectrum analyzer:
. Network analyzer:
. Digital voltmeter:
. Composite video monitor
. Extension board:
. 75 Z terminators (4 pcs.)
. Shorting clip (1 pc.)
. Cleaning tape:
. Alignment tapes
For DNW-A100/A50/A45:
For DNW-A100P/A50P/A45P:

6-4-1. Replacement Procedure

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Turn off the POWER switch before starting the replacement.
(1) Remove the upper lid, board retainer (S), and DM-89 (original) board.
(Refer to "6-1-3. Plug-in Board Pulling out/Insertion".)
(2) After inserting the extension board EX-377 to the slot for DM-89 board, and then connect a new DM-
89 board to the extension board.
(3) Clean the video heads once. (Refer to "5-2-1. Cleaning using Cleaning Tape".)
(4) Perform the electrical adjustments (Section 6-4-2).
(5) For DNW-A100/A50/A45 only
Return the ITEM-709 and ITEM-713 of setup extend menu to previous settings after the electrical
adjustments are completed.
(6) Return the states of S1100-1 on the SS-63 board and control panels to their previous states.
(7) Turn off the power, and wait for 30 seconds.
(8) Remove the adjusted DM-89 board from the extension board, then pull out the extension board.
(9) Reattach the board retainer (S) and upper lid after inserting the adjusted DM-89 board.
(Refer to "6-1-3. Plug-in Board Pulling out/Insertion".)
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
TEKTRONIX TSG-170A or equivalent
TEKTRONIX TSG-271 or equivalent
TEKTRONIX WFM300 or equivalent
TEKTRONIX 2465B or equivalent
ADVANTEST R3261A or equivalent
ANRITSU MS420B or equivalent
ADVANTEST TR6845 or equivalent
EX-377 (SONY part No. J-6269-810-A)
BCT-5CLN (SONY standard products)
CR5-1B (SONY part No. 8-960-096-41) and
CR5-2A (SONY part No. 8-960-097-44)
CR5-1B PS (SONY part No. 8-960-096-91) and
CR5-2A PS (SONY part No. 8-960-098-44)
6-4. DM-89 Board Replacement
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