Sharp Aquos LC-26GD7E Bedienungsanleitung

SERVICE MANUAL

LCD COLOUR

TELEVISION (Display)

MODEL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored

to its original condition and only parts identical to those specified should be used.

SHARP

CONTENTS

CORPORATION

NOTE ON ELECTROSTATICAL SHIELDING.....................................................................................................2

SAFETY WARNINGS / REGULATIONS .............................................................................................................2

PRECAUTIONS FOR USING LEAD-FREE SOLDER.........................................................................................3

REAR PANEL REMOVAL....................................................................................................................................4

WIRING DIAGRAM L2650 ..................................................................................................................................6

ENTER SERVICE MODE....................................................................................................................................8

OPTION BYTES TABLE WITH SERVICE RELEVANT OPTION BITS .............................................................15

SERVICE MENU L2650 (LCD)..........................................................................................................................21

SOFTWARE LOADING.....................................................................................................................................22

COMPONENTS CHART ...................................................................................................................................24

TECHNICAL SPECIFICATIONS........................................................................................................................25

TROUBLESHOOTING FOR LCD-CONTROLLER AND MICOM-BOARD........................................................26

APPENDIX ........................................................................................................................................................29

SPARE PARTS LIST.........................................................................................................................................63

230-90433926

LC26GD7E

Note on electrostatic shielding

1. Electrostatically shielded MOS workstations

Components sensitive to electrostatic discharge

must be handled at workstation with electrostatic

shielding.Anelectrostatically shieldedMOSwork-

station is ﬁtted with discharge resistor which earth

all conductive materials, including the technician

working there. Dielectrics are discharged by air

ionisation. The use of soldering irons and meas-

uring equipment at shielded workstation is only

possible in conjunction with isolating transformer

in each of the devices used. Measuring equip-

ment chassis are also earthed with discharge re-

sistors.

2. Shielded packaging using conductive

materials

To protect against electrostatic charges, electri-

cally conductive plastics are used for packaging

and transport purposes. Conductive plastics are

available in the form of transparent protective

bags, foam plastic, ﬁlm sheeting or containers.

Sensitive components requiring the use of pro-

tective packaging must only be packed and un-

packed at shielded workstations.

Safety warnings/regulations

1. The repair, modiﬁcation and testing of mains-op-

erated electronic devices and their accessories

must only be performed by qualiﬁed persons.

2. It is necessary to follow the regulations and safety

warnings to VDE 0701, part 200, as well as the

regulations and safety warnings applicable in the

country concerned.

3. VDE 0701, Part 2, contains regulations on the re-

pair, modiﬁcation and testing of mains-operated

electronic devices and their accessories.

4. Before delivery, the device and the connecting

leads (including any protective earth conductor

ﬁtted) must undergo visual inspection, and the

insulation resistance and the equivalent leak-

age current must be measured according to VDE

0701, part 200. The low-resistance continuity of

the protective earth conductor must be veriﬁed by

measurement to VDE regulation 0701, part 1.

5. The regulations of the country concerned must

also be observed.

6. Only genuine parts must be used for replacing

components marked with the symbol .

Precautions for using lead-free solder

1. Employing lead-free solder

„LCD CONT PWB“,“TMDS RX PWB“,“KEY PWB“,“R/C LED PWB“,“MOTOR PWB“,“INV PWB“,“POWER

PWB“of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on

the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

Example:

Indicates lead-free solder of tin, silver and copper.

2. Using lead-free wire solder

When ﬁxing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conven-

tional lead wire solder may cause damage or accident due to cracks.

As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40ºC, we recom-

mend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or

sodening bit, contact our service station or service ranch in your area.

3. Soldering

As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional

lead solder by 40°C, and as it has poor solder wettabillty, you may be apt to keep the soldering bit in contact

with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-

resistance temperature of parts may be excoeded, remove the bit from the PWB as soon as you conurm the

steady soldering condition.

Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to

turn on and off the power of the bit as required. if a different type of solder stays on the tip of the soldering

bit, it is alloyed with lead-free solder. Clean the bit after every use of it.

When the tip of the soldering bit is blackened during use, ﬁle it with steel wool or ﬁne sandpaper.

Lead-free wire solder for servicing

Be careful when replacing parts with polarity indication on the PWB silk.

LFa

Part No. ËDescription Code

ZHNDAi123250E J φ 0.3mm 250g(1roll) BL

ZHNDAi126500E J φ 0.6mm 500g(1roll) BK

ZHNDAi12801KE J φ 1.0mm 1kg(1roll) BM

Rear panel removal

1. Place the set on a clean and soft base.

2. Open the screws (ﬁg. 1 and 2).

3. Mount stand for serviceposition.

Fig. 1

Fig. 2

1. Remove the 4 lock screws 1, 10 lock screws 2from the LCD Panel Unit, and detach the LCD Panel Unit.

2. Detach the Reflection/Deflection Sheet, Prism Sheet, Diffusion Sheet, and Diffusion Panel.

3. Remove the 6 lock screws 3 from the Lamp Holder, and detach the Lamp Holder.

REMOVING OF MAJOR PARTS

Lamp Holder

(LHLDZA615WJKZ)

Lamp

(KLMP-A068WJZZ)

Lamp Holder

(LHLDZA615WJKZ)

Diffusion Sheet (PSHEPA337WJZZ)

Prism Sheet (PSHEPA338WJZZ)

Reflection/Deflection Sheet (PSHEPA339WJZZ)

Diffusion Panel (PCOVUA064WJZZ)

B/L Chassis

(LCHSMA219WJZZ)

Lamp Rubber

(PGUMMA008WJKA)

Lamp Rubber

(PGUMMA008WJKA)

LCD Panel Unit

(PLCDTA070WJZZ)

Control - Board (SC)

Back -

Light -

Inverter

(SC)

Basic board

89435var

Signal board

89445var

AC-

power-

line

Front -

Audio-

Video /

Head-

Phone

89194xxx

W691

W811

W898

W889

Sat Frontend 89198.var

W101

CI- Interface

LC-xxGS7L

W101

Micom - Board (SC)

LC-xxGS7L

Local

Control

89477050

CN7501

CN7502

CN7503

CN7504CN7505

CN7506

CN7507

CN7508

CN7401

CN7402

CN7403

CN7404

CN7405

CN7406

W101

W661

P3200

P3201

P3202

P2303

P5702

P5701

SC3202 P2301

P7701

P7703

SC4601

CN7601

CN7602

CN7603

CN7604

CN7605CN7606

CN7607CN7608

CN7609

CN7610

W2151 W2231

W4601 W4611

W2101

W2111

W2134

W2131

W2021

W2011

W651

89384054

89456002

89207002

86185001

89541002 89542002

86318059

87286070

86188050 89441001

89188001

89536051

89536052

IR Receiver/LED

89476050

Wiring diagram L2650

654321

OVERALL WIRING DIAGRAM

END BACK

INFO

PIP

TIMER

RADIO

fig. 1

fig. 2

Enter service mode

Pre-setup position: set is in TV mode

1. Press MENU button on top of the TV set to enter menu „direct control on tv set“ (ﬁg. 1, pos. 1)

2. Press button „P ^“ until „service“ is shown in menu (ﬁg. 1, pos. 2)

3. When service appears press the MENU button on the remote control within 1 sec (ﬁg. 2, pos. 3).

Service menu appears.

4. Step with cursor buttons on remote control (ﬁg. 2, pos. 4) through the service menu to change settings.

5. Each modiﬁcation of any value has to be memorized with the „OK“ button on remote control (ﬁg. 2, pos. 5).

ADJUSTMENT PROCEDURES

The adjustment values are set to the optimum conditions at the factory before shipping. If a value should becom

improper or an adjustment is required due to part replacement, make an adjustment according to the followin

procedure.

1. Display adjustment procedure

1. Adjustment procedure

Enter the display process mode and then adjust COM BIAS.

2. Adjustment process mode key operation table

3. COM BIAS adjustment

Shift to the [COM BIAS] item with the cursor UP/DOWN key and select a numeric value with the cursor

RIGHT/LEFT key.

Changing the numeric value with the cursor UP/DOWN key will make appear the test pattern. Make an

adjustment so that the flicker near the center of the screen is minimized.

Caution: Use due care in handling the infomation described here lest your users should know how

to enter the adjustment process mode. If the settings are tampered in this mode,

unrecoverable system damage may result.

Function 1 (when on the left side of a page)

Moving up by one item or moving to the

previous page (when at the top)

Moving down by one item or moving to the next

page (when at the bottom)

Moving to the right by one item or moving to

another page (in the case of the initial page)

Moving to the left by one item or moving to

another page (in the case of the initial page)

Test pattern off

Moving to the next page

Moving up by one item or moving to the

previous page (when at the top)

Moving down by one item or moving to the next

page (when at the bottom)

Moving to the right by one item or moving to

another page (in the case of the initial page)

Moving to the left by one item or moving to

another page (in the case of the initial page)

Function 2 (when changing a numeric value)

Incrementing the adjustment value by one or

executing the item (in the case of W or R items)

Decrementing the adjustment value by one or

executing the item (in the case of W or R items)

Moving to the right by one item

Moving to the left by one item

Executing the item (in the case of W or R

items)

Moving to the next page

Incrementing the adjustment value by one or

executing the item (in the case of W or R items)

Decrementing the adjustment value by one or

executing the item (in the case of W or R items)

Moving to the right by one item

Moving to the left by one item

Key

Cursor UP

Cursor DOWN

Cursor RIGHT

Cursor LEFT

INPUT

mark of the R/C

(caution required)

CH (ù)

CH (Ù)

VOL (+)

VOL (–)

Values specific to each Display

Resetting to "0"

After resetting to "0", perform an operational check to ensure that the lamp error detection feature

is not activated.

Table of contents of adjustment process mode Page 0

4 Lamp error detection

4.1 Feature description

This liquid-crystal colour TV incorporates a lamp error detection feature (lamp error detection) that

automatically turns OFF lamp drivers if one lamp fails.

If anything is wrong with the lamp or lamp circuit or when the lamp error detection failure is activated for

some reason, the following will result: All lamps are switched off the audio remains and green led keeps on.

After switching on and off lamps go on for around 1 sec. until lamp error detected.

4.2 Measures

a) With lamp error in on mode (green led on) its possible to check the power supply (15 V for lamp

inverters)

b) Test on inverter circuit is only possible in the ﬁrst moment after switching on until protection circuit

cuts driver signals for all lamps.

A simple test to ﬁnd out which lamp inverter does not work: Check with oscilloscope the signal direct-

ly on core of inverter transformers.

c) Resetting of lamp error counter

After successful repair of lamps or inverter circuits its helpful to reset the lamp error counter through

service mode: see page 8

For resetting go to LCD adjustments in servicemode. With T‚ go to panel service.

Press now ﬁrst green button and then ok button on remote control (attention: for protection the green button

is not mentioned in on screen menue).

Red panel servicemenue comes up on screen.

Move cursor with Tdown to “L ERR Reset” and move to right side with X

Press any cursor to reset lamp error to “0”.

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