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6-6. TBC-23 Board Replacement
6-6. TBC-23 Board Replacement
The electrical adjustments are essential after the TBC-23 board is replaced.
To perform the electrical adjustment, the following equipment and fixtures are required.
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The TBC-23 board of the service parts code suffix-A cannot be used to this unit. Be sure to check the
suffix of service parts code before replacement. The service parts code is indicated on near the top right
corner (F-2) of side A of TBC-23 board.
For the TBC-23 board of the board number 1-648-543-13 or 1-648-543-14, modification is required.
Please consult your Sony Sales Office/Service Center detail. The board number is indicated on the left
margin (A-6) of side A of TBC-23 board.
. Composite waveform/vector monitor
For DNW-A22:
For DNW-A22P:
. Composite video monitor
. 75 Z terminator (1 piece)
. Cleaning tape
. Alignment tapes
For DNW-A22:
For DNW-A22P:
6-6-1. Replacement Procedure
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Turn off the POWER switch before starting the replacement.
(1) Remove the upper lid, board retainer (S), and TBC-23 (original) board.
(Refer to "6-1-3. Plug-in Board Pulling out/Insertion".)
(2) Inserting a new TBC-23 board to the slot for TBC-23 board.
(3) Connect the one disconnected harness to CN1 on the TBC-23 (new) board.
(4) Clean the video heads using a cleaning tape. (Refer to "5-2-1. Cleaning using Cleaning Tape".)
(5) Perform the electrical adjustments (Section 6-6-2).
(6) For DNW-A22 only
Return the ITEM-709 and ITEM-713 of setup extend menu to previous settings after the electrical
adjustments are completed.
(7) Return the states of S1100-1 on the SS-63 board and control panels to their previous states.
(8) Turn off the power.
(9) Reattach the board retainer (S) and upper lid. (Refer to Section 6-1-3.)
6-78
TEKTRONIX 1780R or equivalent (With LINE SELECT)
TEKTRONIX 1781R or equivalent (With LINE SELECT)
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)
DNW-A22/A22P
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