Control Board Removal; Pin Board Removal - Zenith ZCM-1490 Service Manual

Control Board Removal
The control board holds the external brightness and
contrast controls. To remove the control board:
1 . Refer to Figure 3-5 and slide the control board
back and up from the tracks that hold it.
2. Disconnect connector SA 1 to the video board
and remove the control board.
Figure 3-5. Control Board Removal
PIN Board Removal
The PIN board is located at the top front portion of
the monitor. It is held in place by two support rails
that span the width of the chassis. To remove the
PIN board:
1. Loosen the support rails. Refer to Figure 3-S
and remove the two hex screws holding each of
the support rails in place.
2. Cut the cable ties indicated in Figure 3-S.
3. Disconnect the following cables entering the PIN
board: SRS, SVS, and SUS.
4. Disconnect the following cables leaving the PIN
board: 4TS (to dynamic focus board).
5. Lift the PIN board and support rails out of the
monitor. The front support rail is held to the
board by plastic standoffs. The rear support rail
is screwed to the two heat sinks on the PIN
board. Remove the rails as necessary.
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Figure 3-6. PIN Board Removal
Page 3-4
Disassembly