Read Sharp LC-20B6E (serv.man7) Service Manual online
11
LC-20B6E
REMOVING OF MAJOR PARTS
1. Remove the four lock screws from the stand, and detach the stand.
2. Remove the terminal covers (left and right).
3. Remove the three terminal screws.
4. Remove the twelve lock screws from the cabinet B.
5. Cabinet A is order of
2. Remove the terminal covers (left and right).
3. Remove the three terminal screws.
4. Remove the twelve lock screws from the cabinet B.
5. Cabinet A is order of
5-1
thru
5-6
, and detach the cabinet B.
6. Remove the four lock screws from the stand angle, and detach the reinforcement angle.
7. Disconnect all the connectors from all the PWBs.
7. Disconnect all the connectors from all the PWBs.
NOTE: After removing the back cover of cabinet, be careful with the LCD panel because it is not hold by any screw to the
front cabinet.
Cabinet B
4
3
1
2
2
5-6
Cabinet A
Terminal Cover (S)
Terminal Cover (L)
Stand
5-4
5-3
5-2
5-1
5-5
P4050
CN1
SC1201
SC701
P2003
SC3401
P6707
P6706
P6705
P6704
P6702
P6701
P3302
P3404
P3303
P4001
P3703
SC2001
P3704
Operation PWB
Reinforcement Angle
Main PWB
R/C, LED PWB
Inverter PWB
6
7
7
7
7
7
7
7
7
7
Analog PWB
P6703
12
LC-20B6E
8. Remove the two lock screws from the operation panel (top cover), and detach the operation panel (top cover).
9. Remove the two lock screws from the operation PWB, and detach the operation PWB.
10. Remove the two lock screws from the R/C, LED PWB, and detach the R/C, LED PWB.
11. Remove the two lock screws of each the speaker boxes (left and right), and detach both speaker boxes.
9. Remove the two lock screws from the operation PWB, and detach the operation PWB.
10. Remove the two lock screws from the R/C, LED PWB, and detach the R/C, LED PWB.
11. Remove the two lock screws of each the speaker boxes (left and right), and detach both speaker boxes.
Speaker Box (R)
R/C, LED PWB
Analog PWB
Main PWB
Speaker Box (L)
Inverter PWB
Operation panel (Top Cover)
Operation PWB
11
9
8
11
10
13
LC-20B6E
12. Remove the two lock screws from the inverter PWB, and detach the inverter PWB.
13. Remove the five lock screws from the main PWB, and undo the claws a and b. Detach the main PWB by lifting the area
13. Remove the five lock screws from the main PWB, and undo the claws a and b. Detach the main PWB by lifting the area
around the claws and pulling the PWB out.
14. Remove the four lock screws from the analog PWB, and undo the claws c and d. Detach the chassis frame (right) from
the analog PWB by pulling out the terminals. In the same way, undo the claws e and f, and detach the chassis frame
(left) from the analog PWB by pulling out the terminals.
(left) from the analog PWB by pulling out the terminals.
Note: When detaching the main PWB and analog PWB, be careful not to break the PWB-fixing claws.
Inverter PWB
Main PWB
Analog PWB
f
Chassis Frame (L)
Chassis Frame (R)
14
13
12
e
a
b
c
d
14
LC-20B6E
•Precautions in handling the liquid crystal panel
1. Handle it in a clean room. (Above 50% humidity)
2. The worker must wear an earth band.
3. Be careful not to drop, vibrate and shock the panel.
4. Use an ionizer. (Within 30 cm)
2. The worker must wear an earth band.
3. Be careful not to drop, vibrate and shock the panel.
4. Use an ionizer. (Within 30 cm)
15. Remove the three lock screws from the liquid crystal panel, and detach the liquid crystal panel unit.
16. Remove the reflecting/polarizing sheet, prism sheet, diffusion sheet and diffusion plate.
17. Remove the lamp holder (top)-A, -B and the lamp holder (bottom) from the lamp unit assembly.
18. Remove the upper and lower reflection sheets from the back shield.
16. Remove the reflecting/polarizing sheet, prism sheet, diffusion sheet and diffusion plate.
17. Remove the lamp holder (top)-A, -B and the lamp holder (bottom) from the lamp unit assembly.
18. Remove the upper and lower reflection sheets from the back shield.
Lamp Holder (Bottom)-Left
(LHLDZA368WJKZ)
(LHLDZA368WJKZ)
Lamp Holder (Top)
(LHLDZA365WJKZ)
(LHLDZA365WJKZ)
Lamp Unit
(KLMP-A034WJZZ)
(KLMP-A034WJZZ)
Reflection Sheet (Bottom
(PSHEPA206WJZZ)
(PSHEPA206WJZZ)
Lamp Holder (Bottom)-Right
(LHLDZA367WJKZ)
(LHLDZA367WJKZ)
Back Shield
(PSLDMA448WJFW)
(PSLDMA448WJFW)
Lamp Holder (Top)
(LHLDZA365WJKZ)
(LHLDZA365WJKZ)
Diffusion Sheet
(PSHEPA204WJZZ)
(PSHEPA204WJZZ)
Prism Sheet (H)
(PSHEPA203WJZZ)
(PSHEPA203WJZZ)
Diffusion Plate
(PCOVUA035WJZZ)
(PCOVUA035WJZZ)
Prism Sheet (V)
(PSHEPA208WJZZ)
(PSHEPA208WJZZ)
20" LCD Panel Unit
15
Reflection Sheet (Top)
(PSHEPA205WJZZ)
(PSHEPA205WJZZ)
18
16
17
