Sharp LC-70LE747E Schematic

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LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

SERVICE MANUAL

No. S63B7LC70LE74

LCD COLOUR TELEVISION

LC-70LE747E/RU LC-80LE657E/RU

MODELS

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.

LC-90LE757E/K/RU

CONTENTS

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY PRE-

CAUTION ............................................................i

Precautions for using lead-free solder ...............ii

End of life disposal ............................................ iii

OUTLINE

MAJOR SERVICE PARTS ................................iv

CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS ......................................... 1-1

CHAPTER 2. OPERATION MANUAL

[1] Parts Name .................................................... 2-1

[2] OPERATION MANUAL .................................. 2-5

CHAPTER 3. DIMENSIONS

[1] DIMENSIONS ................................................ 3-1

CHAPTER 4. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS

(LC-70LE747E/RU) ....................................... 4-1

[2] The location putting on the heat measure

sheet (LC-70LE747E/RU) .............................. 4-2

[3] Precautions for assembly

(LC-70LE747E/RU) ........................................ 4-3

[4] REMOVING OF MAJOR PARTS

(LC-80LE657E/RU) ....................................... 4-4

[5] The location putting on the heat measure

sheet (LC-80LE657E/RU) .............................. 4-5

[6] Precautions for assembly

(LC-80LE657E/RU) ........................................ 4-6

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

[7] REMOVING OF MAJOR PARTS

(LC-90LE757E/K/RU) ...................................4-7

[8] The location putting on the heat measure

sheet (LC-90LE757E/K/RU) ..........................4-8

[9] Precautions for assembly

(LC-90LE757E/K/RU) ....................................4-9

CHAPTER 5. ADJUSTMENT

[1] ADJUSTMENT PROCEDURE ......................5-1

CHAPTER 6. TROUBLESHOOTING TABLE

[1] TROUBLESHOOTING TABLE ......................6-1

[2] LED flashing specification at the time of the

error .............................................................6-15

CHAPTER 7. MAJOR IC INFORMATIONS

[1] MAJOR IC INFORMATIONS .........................7-1

CHAPTER 8. OVERALL WIRING/SYSTEM BLOCK DIAGRAM

[1] OVERALL WIRING DIAGRAM

(LC-70LE747E/RU) ......................................8-1

[2] OVERALL WIRING DIAGRAM

(LC-80LE657E/RU) ......................................8-2

[3] OVERALL WIRING DIAGRAM

(LC-90LE757E/K/RU) ....................................8-3

[4] SYSTEM BLOCK DIAGRAM .........................8-4

Parts Guide

This document has been published to be used for after sales service only. The contents are subject to change without notice.

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

LC-70LE747E

SAFETY PRECAUTION

Service Manual

IMPORTANT SERVICE SAFETY PRECAUTION

Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow:

 WARNING

1. For continued safety, no modification of any circuit should be attempted.

2. Disconnect AC power before servicing.

CAUTION:

FOR CONTINUED PROTECTION AGAINST A RISK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE.

F7001(6.3A/250V) -LC-80LE657E/RU/LC-90LE757E/K/RU

• Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.

• Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 1.05 V peak (this corresponds to 0.7 mA peak AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the monitor to the owner.

F7001(5A/250V)-LC-70LE747E/RU

DVM

 BEFORE RETURNING THE RECEIVER

AC SCALE

(Fire & Shock Hazard)

Before returning the receiver to the user, perform the following safety checks:

3. Inspect all lead dress to make certain that leads are not pinched, and check that hardware is not lodged between the chassis and other metal parts in the receiver.

4. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.

5. To be sure that no shock hazard exists, check for leakage current in the following manner.

• Plug the AC cord directly into a 220~240 volt AC outlet.

• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

TO EXPOSED METAL PARTS

1.5k ohm 10W

0.15µF

TEST PROBE

CONNECT TO KNOWN EARTH GROUND

SAFETY NOTICE

Many electrical and mechanical parts in LCD color television have special safety-related characteristics.

These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily increased by using replacement components rated for higher voltage, wattage, etc.

Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features

are identified by “ ” and shaded areas in the Replacement Parts List and Schematic Diagrams.

For continued protection, replacement parts must be identical to those used in the original circuit.

The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

Precautions for using lead-free solder

Employing lead-free solder

• “PWBs” 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:

L Fa

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

L F a/a

Using lead-free wire solder

• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional 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 40 °C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.

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 wettability, 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 exceeded, remove the bit from the PWB as soon as you confirm 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.

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

Lead-free wire solder for servicing

Part No. Description Code

ZHNDAi123250E J φ0.3mm 250g (1roll) BL ZHNDAi126500E J φ0.6mm 500g (1roll) BK ZHNDAi12801KE J φ1.0mm 1kg (1roll) BM

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

End of life disposal

iii

LC-70LE747E

OUTLINE

MAJOR SERVICE PARTS

PWB Unit

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

Service Manual

Ref No.

N DKEYDG216FM56 MAIN Unit (LC-70LE747E/RU) N DKEYDG216FM55 MAIN Unit (LC-80LE657E/RU) N DKEYDG216FM54 MAIN Unit (LC-90LE757E/K/RU) N DUNTLG281FM51 LCD CONTROL Unit (LC-80LE657E/RU,LC-90LE757E/K/RU) N DUNTLF975FM51 LCD CONTROL Unit (LC-70LE747E/RU) N DUNTLF770FM54 ICON Unit (LC-70LE747E/RU,80LE657E/RU) N DUNTLG014FM51 ICON Unit (LC-90LE757E/K/RU) N DUNTLF494FM51 R/C OPC Unit (LC-70LE747E/RU,80LE657E/RU) N DUNTLG015FM51 R/C OPC Unit (LC-90LE757E/K/RU) N DUNTLF800FM53 KEY Unit N RUNTKB126WJQZ BLUETOOTH Unit N RUNTKA933WJN2 POWER Unit (LC-70LE747E/RU) N RUNTKB096WJQZ POWER Unit (LC-80LE657E/RU,90LE757E/K/RU)

NOTE: (*1) Replace MAIN Unit (DKEYDG216FM5*) in case of IC3301 or IC3103 failure.

PARTS CODE DESCRIPTION

OTHER Unit

Ref No.

N R1LK695D3GW80F 70" LCD Panel Module Unit (LK695D3GW80F) (B3KUT740E1) N R1LK800D3GW1AT 80" LCD Panel Module Unit (LK800D3GW1AT) (B3KUU657E1) N R1LK900D3GW10V 90" LCD Panel Module Unit (LK900D3GW10V) (B3KUV757E1)

PARTS CODE DESCRIPTION

IC For Exclusive Use Of The Service

Ref No. Parts No. Description Q'ty

IC2004 RH-iXD515WJN8Q IC R5F21368CNFP (Monitor Microprocessor) 1

Service Jigs

Ref No. Parts No. Description

N QCNW-M539WJQZ Connecting Cord Main to POWER Unit and LCD Control Unit (PD) N QCNW-K597WJQZ Connecting Cord Main to Woofer (SB) (LC-90LE757E/K/RU) N QCNW-K595WJQZ Connecting Cord Main to Speaker Unit L/R (SP) N QCNW-F676WJQZ Connecting Cord Main to LCD Control Unit (LV) N QCNW-C222WJQZ Connecting Cord 80pins, LCD Control Unit to LCD Panel Unit, x2 N QCNW-N562WJPZ Connecting Cord Main to ICON/KEY/RC OPC Unit (LC-70LE747E/RU,80LE657E/RU)

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

LC-70LE747E

CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS

Service Manual

1 – 1

LC-70LE747E

CHAPTER 2. OPERATION MANUAL

[1] Parts Name

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

Service Manual

2 – 1

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

2 – 2

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

2 – 3

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

2 – 4

[2] OPERATION MANUAL

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

2 – 5

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

2 – 6

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

2 – 7

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

LC-70LE747E

CHAPTER 3. DIMENSIONS

[1] DIMENSIONS

Service Manual

3 – 1

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

3 – 2

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

3 – 3

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

LC-70LE747E

CHAPTER 4. REMOVING OF MAJOR PARTS

Service Manual

[1] REMOVING OF MAJOR PARTS (LC-70LE747E/RU)

1. Removing of Stand Unit and Rear Cabinet Ass’y

1. Removing the 4 lock screws (1) and detach the Stand Unit.

2. Remove the 1 lock screw (2) and detach the AC Cord Cover (3).

3. Disconnect AC wire and detach the AC Cord (4)

4. Remove the 19 lock screws (5), 9 lock screws (6), 2 lock screws (7) and detach the Rear Cabinet Ass’y (8).

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4 – 1

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

[2] The location putting on the heat measure sheet (LC-70LE747E/RU)

1. MAIN PWB Unit

History paper

Be careful to arrange

dark grey sheet at IC3301 side.

(In order to reduce the radiation.)

2. LCD Control Unit

Light gray

Dark gray)

Center

PSPAZC805WJKZ

COOLER:20x20 t7

Main

IC3301

Center

(3),(4) Stick *** COOLING SHEET (x2)

(4) PSPAZD121WJKZ

23*23 t1.5

(3) PSPAZD120WJKZ

23*23 t4

23mm

Light gray

1.5mm

Dark gray)

4mm

4 – 2

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

Rear side view

(2) Stick*** PMLT-A691WJQZ

(1) Prepare*** PSLDMB847WJ3W SHIELD US B CUT

(3) Stick*** PMLT-A690WJQZ

(2) Stick*** PMLT-A676WJZZ GAS KET(HDM I)

㩷

[3] Precautions for assembly (LC-70LE747E/RU)

1. Points to be checked and precautions when servicing the unit

Mount the main PWB Ass’y on the backlight chassis and check that the EMI-prevention parts are not peeled and twisted from the access holes. (The EMI-prevention parts, conductive nonwoven fabric gaskets, must be seen from the access holes.)

[Countermeasure]

Attach the conductive nonwoven fabric gaskets on the shielded case on the main PWB.

LANGKD561WJ3W

M_ANGLE/TRM-BTM

(4) Stick*** PMLT-A691WJQZ CONDUCTIVE TAPE

8*180mm

(x2)

4 – 3

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

[4] REMOVING OF MAJOR PARTS (LC-80LE657E/RU)

1. Removing of Stand Unit and Rear Cabinet

1. Remove the 4 lock screws (1) and detach the Stand Unit.

2. Remove the 26 lock screws (2), 10 lock screws (3) and detach the Rear Cabinet (4).

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4 – 4

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

PSPAZC854WJKZ

[5] The location putting on the heat measure sheet (LC-80LE657E/RU)

1. MAIN PWB Unit

2. LCD Control Unit

PSPAZC871WJKZ

COOLINGSHEE T

24.8 +2/-2mm

Center of pin

20.7 +2/-2mm

4 – 5

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

PMLT-A693WJZZ PMLT-A694WJZZ PMLT-A676WJZZ

PCLiCA004WJKZ

PMLT-A695WJZZ

[6] Precautions for assembly (LC-80LE657E/RU)

1. Points to be checked and precautions when servicing the unit

[Countermeasure]

Attach the conductive nonwoven fabric gaskets on the shielded case on the main PWB.

4 – 6

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

[7] REMOVING OF MAJOR PARTS (LC-90LE757E/K/RU)

1. Removing of Stand Unit and Rear Cabinet Ass’y.

1. Remove the 4 lock screws (1) and detach the Stand Unit.

2. Remove the 3 lock screws (3), 20 lock screws (4), 10 lock screws (5) and detach the Rear Cabinet (L) Ass'y (6), Rear Cabinet (R) Ass'y (7).

3. Remove the 5 lock screws (8), 8 lock screws (9) and detach the Rear Cabinet (C) Ass'y (10).

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4 – 7

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

PSPA Z C8 7 1 WJKZ

[8] The location putting on the heat measure sheet (LC-90LE757E/K/RU)

1. MAIN PWB Unit

2. LCD Control Unit

PSPA Z C85 4 W J K Z

4 – 8

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

(1) Prepare*** PSLDMB834WJ1W MAIN SHIELD

(4) Stick*** PMLT-A693W JZZ GASKET short (x2)

(3) Stick*** PMLT-A694WJZZ GASKET long tag

(2) Stick*** PMLT-A676WJZZ GASCKET 100*5 t2

(5) Install * ** PCLICA004WJKZ for GASKET(x4)

[9] Precautions for assembly (LC-90LE757E/K/RU)

1. Points to be checked and precautions when servicing the unit

[Countermeasure]

Attach the conductive nonwoven fabric gaskets on the shielded case on the main PWB.

4 – 9

LC-70LE747E/RU,80LE657E/RU,90LE757E/K/RU

LC-70LE747E

CHAPTER 5. ADJUSTMENT

Service Manual

[1] ADJUSTMENT PROCEDURE

1. Adjustment method after PWB and/or IC replacement due to repair

The unit is set to the optimum at the time of shipment from the factory.

If any value should become improper or any adjustment is necessary due to the part replacement, make an adjustment according to the following procedure.

1. Procure the following units in order to replace the main unit.

MAIN UNIT: DKEYDG216FM54 (LC-90LE757E/K/RU)

MAIN UNIT: DKEYDG216FM55 (LC-80LE657E/RU)

MAIN UNIT: DKEYDG216FM56 (LC-70LE747E/RU)

NOTE: [Caution when replacing IC (IC2004) in the main unit]

The above IC are Monitor microprocessor.

Before replacing the relevant part, procure the following parts in which the data have been rewritten.

IC2004 RH-iXD515WJN8Q Monitor microprocessor

NOTE: [Caution when replacing ICs (IC3301, IC3103) in the main unit]

When replacing either IC3301 or IC3103, exchange MAIN units for

MAIN UNIT: DKEYDG216FM54 (LC-90LE757E/K/RU)

MAIN UNIT: DKEYDG216FM55 (LC-80LE657E/RU)

MAIN UNIT: DKEYDG216FM56 (LC-70LE747E/RU)

Each part should not be individually exchanged.

NOTE: HDMI ROM Writing

After replacing IC2601, execute “HDMI EDID WRITE” on the page 5/21.

Please execute it after checking MODEL NAME & INCH SIZE. are correct.

If MODEL NAME & INCH SIZE. are not correct, set them previously. (Refer to 2.)

The ROM data based on information of MODEL NAME & INCH SIZE.

1) Enter the process adjustment mode in TV.

2) Use the cursor keys ( / ) and CH keys ( / ) of R/C to select the item [HDMI EDID WRITE] on the page 5/21.

3) It is completed with OK displayed.

2. After replacing the LCD panel or LCD control/MAIN UNIT, check MODEL NAME in the following procedure.

1) Enter the process adjustment mode in TV.

2) Use the cursor keys ( / ) and CH keys ( / ) of R/C to select the item [MODEL NAME] on the page 21/21.

3) Verify that the Model name is displayed.

4) If the Model name doesn’t match, select the values of the Model name with the VOL keys (+/-).

5) After selection in Step 4), press the OK key, and it is completed with OK displayed.

6) Use the cursor keys ( / ) and CH keys ( / ) of R/C to select the item [PANEL_SIZE] on the page 21/21.

7) Verify that the panel size is displayed.

8) If the size doesn’t match, select the values of the panel size with the VOL keys (+/-).

9) After selection in Step 8), press the OK key, and it is completed with OK displayed.

10)After setting [MODEL NAME] [PANEL_SIZE], unplug the AC power cord and plug it back in.

3. After replacing the LCD panel or LCD control PWB, adjust the VCOM in the following procedure.

1) Enter the process adjustment mode.

2) Use the cursor keys ( / ) and CH keys ( / ) of R/C to select the item [VCOM ADJ] on the page 10/21.

3) Press the OK key to verify that the adjustment pattern is displayed.

4) Use VOL keys (+/-) of R/C to adjust the flicker in the center of the screen to minimum.

5) When the optimal state is achieved in Step 4), press the OK key to turn the pattern to OFF.

5 – 1

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Sharp LC-70LE747E Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual