Board - Sony DNW-A100 Maintenance Manual

1-7-41. TBC-24 Board
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The boards of board number suffixes 11 through 15 are
inavailable for this unit without completing the specified
modification to them.
After replacing:
Perform "6-8. TBC-24 Board Replacement" of the mainte-
nance manual part 1.
After repairing:
. When RV202 on the TBC-24 board (board number
suffix is 16 and higher) for DNW-A100P/A50P/A45P
was replaced, set RV202 to the mechanical center.
. When RV303 on the TBC-24 board was replaced,
perform " 3-8-21. TBC VCO Free-running Adjustment"
and later (except Section 3-8-22).
. In other case, perform the electrical adjustment in "6-8.
TBC-24 Board Replacement" of the maintenance manual
part 1.
1-7-42. TC-96 Board
After replacing or repairing this board, perform Section
3-11.
1-7-43. TR-78 Board
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Since the mounted TR-78 board and the component on this
board are out of service parts, be sure to replace the S-
tension regulator assembly when needing to replace/repaire
this board. (Refer to Section 5-16.)
After replacing the S-tension regulator assembly, perform
the tape running adjustment of Section 7-1-2.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
1-7. Service Action after Replacing or Repairing the Mounted Circuit Board
(TBC-24, TC-96, TR-78/79, VPR-17, VR-223/224)
1-7-44. TR-79 Board
After replacing or repairing this board, perform the
following checks.
1. Check the functions of the threading and unthreading
sensors using C012 : THREADING MOTOR in the
maintenance mode.
(Refer to "4-2-2. SERVO CHECK Mode (C0)" of the
maintenance manual part 1.)
2. Execute A008 : S/T TENSION OFFSET in the
maintenance mode. The store the adjustment data.
(Refer to "4-2-7. SERVO ADJUST Mode (A0)" of the
maintenance manual part 1.)
1-7-45. VPR-17 Board
After replacing or repairing this board, perform the video
system alignment of Section 3-7.
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May perform "6-9. VPR-17 Board Replacement" of the
maintenance manual part 1. This substance is nearly equal
to Section 3-7.
1-7-46. VR-223 Board
After replacing or repairing this board, check the functions
of the switches and volumes on this board.
1-7-47. VR-224 Board
After replacing or repairing this board, check the functions
of the switches and volumes on this board.
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