Sharp DX-AT50H (serv.man21) Service Manual ▷ View online
– 9 –
DX-AT50H
2. Installation
(1) Using desoldering braid, remove the solder from the foil of
each pin of the flat pack-IC on the CBA so you can install
a replacement flat pack-IC more easily.
a replacement flat pack-IC more easily.
(2) The “ ” mark on the flat pack-IC indicates pin 1. (See Fig.
S-1-7.) Be sure this mark matches the 1 on the PCB when
positioning for installation. Then presolder the four corners
of the flat pack-IC. (See Fig. S-1-8.)
positioning for installation. Then presolder the four corners
of the flat pack-IC. (See Fig. S-1-8.)
(3) Solder all pins of the flat pack-IC. Be sure that none of the
pins have solder bridges.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a "
is indicated by a "
" mark.
Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8
Instructions for Handling Semi-conductors
Electrostatic breakdown of the semi-conductors may occur
due to a potential difference caused by electrostatic charge
during unpacking or repair work.
due to a potential difference caused by electrostatic charge
during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1 Mohm) that is properly
grounded to remove any static electricity that may be charged
on the body.
grounded to remove any static electricity that may be charged
on the body.
2. Ground for Workbench
Be sure to place a conductive sheet or copper plate with proper
grounding (1 Mohm) on the workbench or other surface, where
the semi-conductors are to be placed. Because the static
electricity charge on clothing will not escape through the body
grounding band, be careful to avoid contacting semi-conductors
with your clothing.
grounding (1 Mohm) on the workbench or other surface, where
the semi-conductors are to be placed. Because the static
electricity charge on clothing will not escape through the body
grounding band, be careful to avoid contacting semi-conductors
with your clothing.
CBA
< Incorrect >
CBA
Grounding Band
Conductive Sheet or
Copper Plate
Copper Plate
< Correct >
1Mohm
1Mohm
DX-AT50H
– 10 –
CABINET DISASSEMBLY INSTRUCTIONS
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.
reverse order. Bend, route, and dress the cables as they were originally.
[1] TOP CABINET
[2] BOTTOM CABINET
[3] TOP SUPPORT ANGLE
[16] TRAY PANEL
[4] FRONT UNIT
[5] FRONT ANGLE
[7] FRONT CBA UNIT
[8] LCD
[9] DIFFUSION SHEET
[10] LIGHITING PLATE
[11] REFLECTION SHEET
[12] LCD HOLDER
[13] FRONT CBA ASSEMBLY
[6] PWB SPACER
[14] BACK PLATE
[15] DVD MECHA UNIT
[18] DVD MECHA
[19] POWER CBA ASSEMBLY
[17] MAIN CBA ASSEMBLY
– 11 –
DX-AT50H
[1]
TOP CABINET
C1
5(S-1)
—
[2]
BOTTOM CABINET
C1
2(S-2), 2(L-1), 2(S-2)
—
[3]
TOP SUPPORT ANGLE
C2
4(S-3)
—
[4]
FRONT UNIT
C2,
2(S-4), *CN1002
—
C5
[5]
FRONT ANGLE
C3
(*CN2001), 4(S-5)
—
[6]
PWB SPACER
C3
*(L-2)
—
[7]
FRONT CBA UNIT
C3
4(S-6)
—
[8]
LCD
C4
Desolder, *2(L-3)
—
[9]
DIFFUSION SHEET
C4
—
—
[10]
LIGHTING PLATE
C4
—
—
[11]
REFLECTION SHEET
C4
—
—
[12]
LCD HOLDER
C4
*(L-4)
—
[13]
FRONT CBA ASSEMBLY
C4
—
—
[14]
BACK PLATE
C5
7(S-7)
—
[15]
DVD MECHA UNIT
C5
3(S-8), Jack Angle, *CN1001, *CN1003J, Erase Plate
—
[16]
TRAY PANEL
C5
*2(L-5)
—
[17]
MAIN CBA ASSEMBLY
C6,
4(S-9), *CN101, *CN4401, *CN303, *CN4402, *CN4403,
1
C7
Desolder
[18]
DVD MECHA
C6
—
—
[19]
POWER CBA ASSEMBLY
C8
4(S-10), Insulation Sheet
—
2. Disassembly Method
REMOVAL
ID/
LOC.
No.
Fig.
No.
Note
PART
1
: Identification (location) No. of parts in the figures
2
: Name of the part
3
: Figure Number for reference
4
: Identification of parts to be removed, unhooked, unlocked,
released, unplugged, unclamped, or desoldered.
P=Spring, L=Locking Tab, S=Screw,
CN=Connector,
*=Unhook, Unlock, Release, Unplug, or Desolder
e.g. 5(S-1) = five Screws (S-1),
P=Spring, L=Locking Tab, S=Screw,
CN=Connector,
*=Unhook, Unlock, Release, Unplug, or Desolder
e.g. 5(S-1) = five Screws (S-1),
2(L-2) = two Locking Tabs (L-2)
5
: Refer to "Reference Notes."
↑
↑
↑
↑
↑
1
2
3
4
5
Reference Notes:
CAUTION 1: When reassembling, connect the motor cable to
the Main CBA assembly correctly as shown in
Fig. C7.
Fig. C7.
DX-AT50H
– 12 –
(S-1)
(S-2)
(S-2)
Fig. C1
[1] TOP
CABINET
CABINET
[2] BOTTOM
CABINET
CABINET
(S-2)
(S-2)
(L-1)
(S-4)
(S-3)
(S-3)
Fig. C2
[3] TOP
SUPPORT
ANGLE
SUPPORT
ANGLE
[4] FRONT UNIT
(S-5)
(S-6)
(S-6)
(S-5)
(L-2)
Fig. C3
CN2001
[5] FRONT
ANGLE
ANGLE
[7] FRONT
CBA UNIT
CBA UNIT
[6] PWB SPACER
(L-4)
(L-3)
(L-3)
Fig. C4
[8] LCD
[9] DIFFUSION SHEET
[10] LIGHITING PLATE
[11] REFLECTION SHEET
[12] LCD HOLDER
[13] FRONT CBA
ASSEMBLY
ASSEMBLY
Desolder (from rear side)
(S-7)
(S-8)
(S-8)
(L-5)
(L-5)
Fig. C5
CN1001
CN1002
CN1003J
[16] TRAY
PANEL
PANEL
[14] BACK PLATE
[15] DVD MECHA UNIT
Jack Angle
Erase
Plate
Plate
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