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6-7. TBC-24 Board Replacement
6-7-1. 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-24 (original) board.
(Refer to "6-1-3. Plug-in Board Pulling out/Insertion".)
(2) Disconnect the one disconnected harness (that it connected TBC-24 board and TBC-23 board) from
TBC-23 board.
(3) After inserting the extension board EX-377 to the slot for TBC-24 board, and then connect a new
TBC-24 board to the extension board.
(4) Connect the extension harness to CN1 on TBC-24 (new) board and CN1 on TBC-23 board.
(5) Clean the video heads using a cleaning tape.
(Refer to "5-2-1. Cleaning using Cleaning Tape".)
(6) Perform the electrical adjustments (Section 6-7-2).
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Remove the extension board and extension harness in some steps of the electrical adjustment.
(7) For DNW-A22 only
Return the ITEM-709 and ITEM-713 of setup extend menu to previous settings after the electrical
adjustments are completed.
(8) Return the states of S1100-1 on the SS-63 board and control panels to their previous states.
(9) Turn off the power.
(10) Reattach the board retainer (S) and upper lid.
(Refer to "6-1-3. Plug-in Board Pulling out/Insertion".)
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DNW-A22/A22P
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