Replacing Dpr-283 Board; Replacing Mb-1100 Board - Sony F35 Maintenance Manual

2-9-2. Replacing DPR-283 board

1. Remove the outside panel. (Refer to Section 1-4.)
2. Remove the TR-138 board. (Refer to Section 2-9-1.)
3. Remove the four screws to detach the heat spreader
DPR.
4. Remove the four screws to detach the DPR-283 board,
DPR-TR bracket (upper), and DPR-TR bracket (lower)
DPR-283 board
DPR-TR bracket (upper)
B2.6 x 6
B2.6 x 6
B2.6 x 6
B2.6 x 4
Heat spreader DPR
5. Install the DPR-283 board by reversing the steps
above.

2-9-3. Replacing MB-1100 Board

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When replacing the MB-1100 board with a new one,
remove the connector board holder from the removed MB-
1100 board and install the connector board holder on the
new board.
1. Remove the inside panel and outside panel.
(Refer to Section 1-4.)
2. Remove the front assembly. (Refer to Section 2-1.)
3. Draw all the plug-in boards. (Refer to Section 2-3-2.)
4. Remove the TR-138 board. (Refer to Section 2-9-1.)
5. Remove the DPR-283 board. (Refer to Section 2-9-2.)
6. Remove the two screws, and remove the CN-2903
flexible board from the MB-1100 board.
(Refer to Section 2-2-3.)
F35
CN501
DPR-TR bracket (lower)
7. Disconnect the harnesses and coaxial cables from all
the connectors on the MB-1100 board. (Refer to the
following table.)
Ref. No. (Pin) Harness Name
CN15 (10P) Harness (RM)
CN21 (5P) Harness (FAN-R)
CN25 (15P) Harness (REAR CA) Power supply assembly
CN26 (5P) Harness (FAN-R)
CN17 (5P) Harness (232C)
CN28 (14P) Harness (PS CONT) Power supply assembly
CN23 (15P) Harness (CLICK)
CN24 (11P) Harness (CLICK-IN) Inside panel
CN16 (12P) Harness (MS)
CN22 (5P) Harness (FAN-R)
CN19 (2P) Harness (TALLY)
CN30 Coaxial cable
assembly
CN20 Coaxial cable
assembly
CN23
Harness
(CLICK)
Harness
(TALLY)
MB-1100 board (side B)
CN19
Coaxial cable
CN30
CN20
Harness
CN15 CN28
(RM)
CN21
CN25
Harness
(FAN-R)
Harness
(REAR CA)
Harness
(FAN-R)
Harness
(PS CONT)
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Be sure to hold the plug when disconnecting the coaxial
cable. Do not pull the cable.
Connected to
Rear CN-BOX assembly
Fans (rear)
Fan (PS)
Outside CN assembly
Front assembly
Chassis assembly
Fan (OHB)
LP-119 board
GENLOCK IN connector
TEST OUT connector
MB-1100 board (side A)
Harness
(FAN-R)
CN22
CN24 CN16
Harness (MS)
Harness
(CLICK-IN)
Harness
(232C)
2-25