Mb-1257 Board - Sony HDCU3500 Service Manual

2-16.

MB-1257 Board

Preparation
1. Remove the top cover. (Refer to
2. Remove the optical multi fiber cable. (Refer to
3. Remove the top chassis and the air distributor assembly. (Refer to
4. Remove the DC fan. (Refer to
5. Remove the VIF-75 board. (Refer to
6. Remove the SY-467 board. (Refer to steps 1 and 2 in
7. Remove the TX-167B board or TX-167A board. (Refer to
TX-167A Board (HDCU3500)".)
Procedure
1. Disconnect the cables.
(1) Disconnect the two harnesses from the connectors (CN001 and CN002) on the MB-1257 board.
(2) Disconnect the two flexible flat cables from the connectors (CN005 and CN010) on the MB-1257 board.
(3) Open the clamper and locking wire saddle [A], and then remove the harness and three fine-wire coaxial cables.
(4) Remove the three fine-wire coaxial cables from the locking edge saddle.
(5) Open the locking wire saddle [B], and then remove the two harnesses.
(6) Disconnect the three harnesses from the connectors (CN004, CN006 and CN007) on the MB-1257 board.
Locking edge saddle
MB-1257 board
Fine-wire
coaxial cables
HDCU3500/HDCU5500
"2-2. Top Cover".)
"2-4. Optical Multi Fiber
"2-9. DC Fan".)
"2-6. VIF-75 Board".)
"2-7. SY-467 Board/AT-195
Harnesses
CN002
CN007
Clamper
CN004
CN006
CN005
Locking wire saddle [B]
Cable".)
"2-5. Top Chassis/Air Distributor
Board".)
"2-11. TX-167B Board (HDCU5500/HKCU-FB50)/
Harness
CN010
CN001
Locking wire saddle [A]
Harnesses
Assembly".)
Flexible flat cables
2-44