Hitachi DV-P745U, Service Manual

Page: 25 / 53

4-1
4-1 CABINET DISASSEMBLY INSTRUCTIONS
4-1-1 Disassembly Flowchart
This flowchart indicates the disassembly steps to gain
access to item(s) to be serviced. When reassembling,
follow the steps in reverse order. Bend, route, and
dress the cables as they were originally.
4-1-2 Disassembly Method
About tightening screws
When tightening screws, tighten them with the follow-
ing torque.
Reference Notes
CAUTION 1: Locking Tabs (L-1), (L-2) and (L-3) are
fragile. Be careful not to break them.
1-1. Release four Locking Tabs (L-1). Then, release
three Locking Tabs (L-2).
1-2. Release three Locking Tabs (L-3). Then remove
the Front Assembly.
CAUTION 2: Electrostatic breakdown of the laser
diode in the optical system block may occur as a
potential difference caused by electrostatic charge
accumulated on cloth, human body etc, during
unpacking or repair work.
To avoid damage of pickup follow next procedures.
2-1. Short the three short lands of FPC cable with sol-
der before removing the FFC cable (CN201) from
it. If you disconnect the FFC cable (CN201), the
laser diode of pickup will be destroyed. (Fig. D4)
2-2. Disconnect Connectors (CN301), (CN401) and
(CN601). Remove two Screws (S-3A) and (S-3B)
and lift the DVD Main CBA Unit. (Fig. D4)
CAUTION 3: When reassembling, confirm the FFC
cable (CN201) is connected completely. Then remove
the solder from the three short lands of FPC cable.
(Fig. D4)
ID/
LOC.
No.
PART
REMOVAL
Fig.
No.
REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER
Note
[1] Top Case D1 3(S-1) -
[2]
Front
Assembly
D2
*4(L-1), *3(L-2),
*3(L-3)
1
1-1
1-2
[3]
Reinforce
Plate
D3 3(S-2) -
[4]
DVD Main
CBA Unit
D4
(S-3A), (S-3B),
*CN201, *CN301,
*CN401, *CN601,
FCC Cover
2
2-1
2-2
[5]
DVD
Mecha D4,
D5
4(S-4)
2
3
[6] AV CBA D6 (S-5), 4(S-6), *2(L-4) -
[7]
Function
CBA
D6 *CN2001 -
↓
(1)
↓
(2)
↓
(3)
↓
(4)
↓
(5)
[1] Top Case
[2] Front Assembly
[3] Reinforce Plate
[4] DVD Main CBA Unit
[5] DVD Mecha [6] AV CBA
[7] Function CBA
Screws Torque
(S-1), (S-2), (S-3A),
(S-4), (S-5), (S-6)
0.45 ± 0.05 N·m
(S-3B) 0.38 ± 0.04 N·m
DISASSEMBLY
4