DOWNLOAD Sharp LC-20E1E (serv.man9) Service Manual ↓ Size: 6.33 MB | Pages: 62 in PDF or view online for FREE

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Precautions in handling the LCD panels
1. Work in a clean room (with humidities below 50%).
2. Be sure to wear an anti-static armband.
3. Handle the panels on an electroconductive mat.
4. Be careful not to fall, shake and shock the panels.

17. Remove the LCD panel unit fixing screws (4 pcs.).
18. Remove the ITO earth spring fixing screw (1 pc.).
19. Remove the reflection/deflection, prism, diffusion, ITO sheets and diffusion panel.
20. Remove the lamp fixing holder fixing screws (6 pcs.).
21. Detach the lamp unit-A/B.
22. Remove the reflection mirror fixing screws. (6 pcs.).

22

21

20

18

19

20

17

17

Back shield Panel
 (PSLDM4685CEFW)

Reflection Mirror
 (PMiR-0296CEZZ)

Lamp Fixing Holder
 (LHLDZ2176CEZZ)

Diffusion Panel
 (PCOVU0107CEZZ)

ITO Sheet
 (PSHEP0289CEZZ)

Prism Sheet
 (PSHEP0287CEZZ)

20" LCD Panel Unit

Reflection/Deflection Sheet
 (PSHEP0286CEZZ)

Diffusion Sheet
 (PSHEP0288CEZZ)

ITO Earth Spring
 (MSPRP1220CEFW)

Lamp Fixing Holder
 (LHLDZ2176CEZZ)

Lamp Unit-B
 (KLMP-A125CEZZ)

Lamp Unit-A
 (KLMP-A124CEZZ)

P6705

SC1201

SC1202

SC1202

P4004

P4004

SC1203

P3702

P2003

P6706

P6705

SC1203

SC2001

SC2001

SC3100

P1903

SC1602

P1903

SC1602

P6706

P3603

P3301

P3302

P3602

P3601

P3601

Inverter-A
PWB

Inverter-B
PWB

Wire holder

Main PWB

Tuner PWB

Main PWB

P3604

P3604

SC2002

7-2

Main unit
(Side B)

2

3

1

5 6

4

R/C, LED PWB

7-3

7-1

Tape

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Precautions at the time of the side B(back) service of main unit.
1. Remove only SC2001 of the FFC for connection between Main unit(SC2001) and Tuner unit(SC3100), and con-

nect the extended cable (                  ) for service.

2. Remove only P3702 of the FFC for connection between Main unit(P3702) and Tuner unit(P1903), and connect the

extended cable (                   ) for service.

3. Remove only SC2002 of the FFC for connection between Main unit(SC2002) and Tuner unit(SC1602), and con-

nect the extended cable (                   ) for service.

4. Remove the FFC for connection between Main unit(SC1203) and LCD panel unit, and connect the extended cable

(                  ) for service.

5. Remove the FFC for connection between Main unit(SC1202) and LCD panel unit, and connect the extended cable

(                   ) for service.

6. Remove the FFC for connection between Main unit(SC1201) and LCD panel unit, and connect the extended cable

(                  ) for service.

7. Remove the R/C, LED unit.

7-1. Peel off the tape.
7-2. Remove a lead from a wire holder.
7-3. Remove the R/C, LED unit fixing screws(2 pcs.).

8. Remove the main unit fixing screws(3 pcs.), a substrate is reversed.

When the microprocessor (IC2001) or the EEPROM (IC2004) has been replaced or when the EEPROM has been
initialized, readjust the each adjustments.
4-1. Connect the pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power.
4-2. Select the model name to (E1E).
4-3. Select the inch size (20).
4-4. LED changes green from red after setting finish and about 15 seconds, initialization is completed, and it

becomes adjustment mode.

5-1. +B adjustment...Page 1 +B-ADJ

Adjust the voltage of the pin (13) of P2002 to 5.00 

±

0.02V.

Note: Since 5.0V is a reference voltage of all power voltage, adjust it precisely.

5-2. Counter-bias adjustment

Vary the "COM BIAS" setting on Page 2 of the adjustment process mode so that the contrast be sharpest
(black looks most sinking).

5-3. TAMP adjustment

1) Receive the upper left of 75% white half colour bar signal.
2) See if the “Y” reading on page 2 of the adjusment process mode is somewhere following. If not, make the

“PAL TAMP” adjustment to get the “Y” reading in the range of BB thru CA.

3) If the adjustment of “PAL TAMP” is executed, write its adjustment value to the “SECAM TAMP” manually.

(Screen of the page 2 of the adjustment processing menu OSD)

0

1

2

3

4

5

6

7

8

9

10

11 12 13

14 15 16

17 18 19

20 21 22

23 24 25 26

2

C

O

M

B

I

A

S

9

0

P

A

L

T

A

M

P

2

1

S

E

C

A

M

T

A

M

P

2

1

G

C

U

T

O

F

F

R

C

U

T

O

F

F

0

–

5

B

C

U

T

O

F

F

G

3

B

3

R

3

0

0

0

0

0

0

–

3

G

1

B

4

Y

0

0

0

0

B

5

T

A

M

P

H

T

A

M

P

L

 

 

 

 

 

C

A

B

B

0

1

2

3

4

5

6

7

8

9

10

11

12

13

Y Data

(White 75%)

5-4. White balance adjustment

Adjust “RCUTOFF” and “BCUTOFF” on the page 2 of the adjustment processing so as to obtain the colour
of the same level as the standard set.
Note: For the adjustment processing of “RCUTOFF” and “BCUTOFF”, adjust them in the indication value
range of ... –9, –7, ... –1, +1, ... +7, +9.
When it becomes even-numbered value, side favor noise sometimes occurs in the monochrome signal of
the specific gradation.