Sharp LC26GD7E Schematic

LC26GD7E

SERVICE MANUAL

230-90433926

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.

CONTENTS

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

LC26GD7E

SHARP

CORPORATION

Note on electrostatic shielding

1. Electrostatically shielded MOS workstations

Components sensitive to electrostatic discharge must be handled at workstation with electrostatic shielding. An electrostatically shielded MOS workstation is ﬁ tted 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 measuring equipment at shielded workstation is only possible in conjunction with isolating transformer in each of the devices used. Measuring equipment chassis are also earthed with discharge resistors.

2. Shielded packaging using conductive materials

To protect against electrostatic charges, electrically conductive plastics are used for packaging and transport purposes. Conductive plastics are available in the form of transparent protective bags, foam plastic, ﬁ lm sheeting or containers. Sensitive components requiring the use of protective packaging must only be packed and unpacked at shielded workstations.

Safety warnings/regulations

1. The repair, modiﬁ cation and testing of mains-op- erated electronic devices and their accessories must only be performed by qualiﬁ ed 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 repair, modiﬁ cation and testing of mains-operated electronic devices and their accessories.

4. Before delivery, the device and the connecting leads (including any protective earth conductor ﬁ tted) must undergo visual inspection, and the insulation resistance and the equivalent leakage current must be measured according to VDE 0701, part 200. The low-resistance continuity of the protective earth conductor must be veriﬁ ed 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:

L Fa

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

2. Using lead-free wire solder When ﬁ xing 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 of f or the maximum heatresistance 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, ﬁ le it with steel wool or ﬁ ne sandpaper.

Lead-free wire solder for servicing

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

Part No.

ZHNDAi123250E J ZHNDAi126500E J ZHNDAi12801KE J

Description Code

φ 0.3mm 250g(1roll) φ 0.6mm 500g(1roll) φ 1.0mm 1kg(1roll)

BL BK BM

Rear panel removal

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

2. Open the screws (ﬁ g. 1 and 2).

3. Mount stand for serviceposition.

Fig. 1

Fig. 2

REMOVING OF MAJOR PARTS

1. Remove the 4 lock screws 1, 10 lock screws 2 from 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.

B/L Chassis (LCHSMA219WJZZ)

Lamp Rubber (PGUMMA008WJKA)

Lamp Holder (LHLDZA615WJKZ)

Lamp Rubber (PGUMMA008WJKA)

Lamp

(KLMP-A068WJZZ)

Lamp Holder (LHLDZA615WJKZ)

Diffusion Panel (PCOVUA064WJZZ)

Diffusion Sheet (PSHEPA337WJZZ)

Prism Sheet (PSHEPA338WJZZ)

Reflection/Deflection Sheet (PSHEPA339WJZZ)

LCD Panel Unit (PLCDTA070WJZZ)

Wiring diagram L2650

Back -

Light -

Inverter

(SC)

P3200

P2303

P3201

LC-xxGS7L

P5702

CN7504CN7505

CN7501

P3202

P2301

Micom - Board (SC)

SC3202

P5701

CN7502

89188001

CN7506

89441001

89456002

CN7507

89384054

W661

CN7508

CN7503

W651

89207002

W691

CN7402

Basic board

89435var

W811

CN7403

W889

W898

AC-

CN7404

power-

line

CN7401

W101

CN7405

CN7406

89536051

89536052

P7703

Control - Board (SC)

LC-xxGS7L

P7701

Local

Control

89477050

W2021

W2011

86318059

SC4601

89542002

W101

W4601 W4611

W2101

W2111

W2134

W2131

89541002

Signal board

89445var

W2231

W2151

87286070

86188050

CI- Interface

86185001

Sat Frontend 89198.var

CN7602

CN7601

CN7603

CN7604

CN7605CN7606

Front -

Audio-

Video /

Head-

Phone

89194xxx

CN7607CN7608

CN7609

89476050

IR Receiver/LED

CN7610

OVERALL WIRING DIAGRAM

654321

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“ (ﬁ g. 1, pos. 1)

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

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

Service menu appears.

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

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

fig. 1

TIMER

RADIO

INFO

PIP

3 5 4

END BACK

fig. 2

ADJUSTMENT PROCEDURES

e g

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.

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.

2. Adjustment process mode key operation table

Key Cursor UP

Cursor DOWN

Cursor RIGHT

Cursor LEFT

INPUT

mark of the R/C

(caution required)

CH (ù)

CH (Ù)

VOL (+)

VOL (–)

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

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.

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 ﬁ rst moment after switching on until protection circuit cuts driver signals for all lamps. A simple test to ﬁ nd 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 ﬁ rst 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 T down to “L ERR Reset” and move to right side with X Press any cursor to reset lamp error to “0”.

Table of contents of adjustment process mode Page 0

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.

5.List of process adjustment modes (Display) (Examples)

Table of contents of adjustment process mode Page 0

Process adjustment list

1st level Page Item Setting range Initial value

Contents 1 CSLEVEL 0~128 00

LCD 1 PWM CTRL 0~7 7

COM BIAS 0~1024 800 ERR STBY 0~Z 0 L ERR RESET Zero clear 0

PWM FREQ 0~4095 1289 PWM DUTY 0~4095 0 OSC FREQ 0~4095 77 OSC DUTY 0~4095 70 PMCG MODE 0~3 0 PMCG SSC 0~3 0 DAT DRV 0~7 0 CLK DRV 0~7 0

2 MODE 50Hz, 60Hz, PC 60Hz

QS SW 0~1 1 QS D1 0~255 84(26”) 84(37”) QS D2 0~255 98(26”) 98(37”) QS D3 0~255 109(26”) 109(37”) QS D4 0~255 123(26”) 123(37”) QS D5 0~255 135(26”) 135(37”) QS D6 0~255 147(26”) 147(37”) QS D7 0~255 160(26”) 160(37”)

3 OPC 0 0~85 0(26”) 0(37”)

OPC 1 0~85 5(26”) 1(37”) OPC 2 0~85 9(26”) 3(37”) OPC 3 0~85 13(26”) 5(37”) OPC 4 0~85 18(26”) 9(37”) OPC 5 0~85 22(26”) 13(37”) OPC 6 0~85 27(26”) 17(37”) OPC 7 0~85 31(26”) 21(37”) OPC 8 0~85 36(26”) 26(37”)

4 OPC 9 0~85 40(26”) 30(37”)

OPC 10 0~85 45(26”) 34(37”) OPC 11 0~85 49(26”) 39(37”) OPC 12 0~85 53(26”) 44(37”) OPC 13 0~85 58(26”) 49(37”) OPC 14 0~85 62(26”) 54(37”) OPC 15 0~85 67(26”) 58(37”) OPC 16 0~85 71(26”) 62(37”)

5 CS 00 0~2 0

VH 247 0~1023 916(26”) 912(37”) VH 191 0~1023 765(26”) 763(37”) VH 159 0~1023 742(26”) 738(37”) VH 127 0~1023 719(26”) 717(37”) VH 95 0~1023 704(26”) 703(37”) VH 63 0~1023 687(26”) 683(37”) VH 31 0~1023 666(26”) 659(37”) VH 0 0~1023 537(26”) 529(37”)

6 VL 0 0~1023 482(26”) 472(37”)

VL 31 0~1023 352(26”) 352(37”) VL 63 0~1023 323(26”) 321(37”) VL 95 0~1023 304(26”) 300(37”) VL 127 0~1023 286(26”) 283(37”) VL 159 0~1023 260(26”) 258(37”) VL 191 0~1023 233(26”) 231(37”) VL 247 0~1023 64(26”) 65(37”)

Monitoring process ERR STBY table

Outline: Communication and power failures detected by the monitoring microcomputer are saved to

EEPROM, and the final states of the errors can be checked in the monitoring process.

Location: Line 3 in page 0 of the monitoring process, ERR STBY field

If there is no error, 0 appears. Value can be cleared to 0 using the cursor.

Indication Error description

Start-up communication error 1

Start-up communication error 2

Start-up communication error 3

Not used Initial communication from the main CPU is not

received.

Only initial communication is received.

Start-up communication error 4

Start-up communication error 5

Start-up communication error 6

Start-up communication error 7

Start-up communication error 8

Start-up communication error 9

Communication error A

Communication error B

Communication error C

Communication error D

Communication error E

Communication error F

Communication error G

Communication error H

Communication error I

Communication error J

Communication error

Red power LED flashing 0

Red power LED flashing 1

Red power LED flashing 2

Red power LED flashing 3

Red power LED flashing 4

Red power LED flashing 5

Red power LED flashing 6

Red power LED flashing 7

Green LED flashing 1

Green LED flashing 2

Green LED flashing 3

Green LED flashing 4 Green LED flashing 5

Green LED flashing 6

Main failure

To the point where communication settings are received

To the point where notice for completion of initialization

is received

To the point where version notification is received To the point where start-up information is received To the point where reply to start-up info is received To the point where time-out settings are received REQ time-out Restart time-out Ending sequence time-out

Timer-programmed start-up time-out (during ending operation)

Not used Not used High-speed ending sequence time-out Regular communication time-out Standby transition time-out Not used Not used Not used Lamp failure Not used Not used Not used Monitor temperature failure Not used Not used 15 V failure Not used CSEN1 failure VSH 3.3 V failure LCD controller 3.3 V failure Not used Error standby request from the main CPU

Red power LED: P2304 (RM), pin 8 Green : TP2301 (IC2301, pin 22)

LED

Option Bytes Table

Adjusted in the factory

dradnatsitluMKDGBr

“0” “1”

Std L1 possible (NICAM Problems)

no Std L1 (NICAM ok)

e nuTlairtserre

No Yes

Yes (TDA9899 V0x)

always enabled enabled (HDMI)

Yes

On O (UK variant default)

On O

Meaning

Alignement function No.

Free

EPG Program lter On O

Free

Tuner-IF-03 (Hybrid)

Byte 0

Blue picture w/o signal Yes No

VGA

Video Out HDMI IC

old TZF04

Free

WSS detection in VCR mode

AMD (autom. movie detection)

Byte 1

OEM set

Free

DVB antenna supply

Free

Option Bytes Table

Adjusted in the factory

O

Yes

O

fully viewable

9:613:4

Not evaluated

d B

k4 ,

83dBk

fully viewable

Yes

“0” “1”

Meaning

FLOF

EPG rst switch on

Subwoofer output O On

Blanking by switch-over

Curtain during switch-on

partial viewable

Video Splitscreen-Video

Evaluated

Reaction time of remote commands Fast Slow

Picture ratio (standard values) Evaluated Blocked

WSS (Wide Screen Signalling Bits)

, 9

O On

t a

R duaBkn

Picture size

L-S

Analogue EPG night update

Switching o after channel closes Yes No

O On

Factory mode

partial viewable

Teletext Splitscreen-Video

"First use" menu

Alignement function No.

Byte 2

Byte 3

Option Bytes Table

Adjusted in the factory

Yes

Slow

(exc. Sync loss/TTX)

08PFQ441

Analogue sound from SCART 2

“0” “1”

Meaning

O

Automatic Program Search uses VAGC

Yes No

Green picture when loss of sync

No Yes

Fast

Power down cycle

Blanking when switching DVB

Warm up mode On O

AMD switch over

P FQ

freerun enabled (exc. TV-Split) locked mode enabled

VSP-packaging

VSP H-Sync

Cursor jumps to bottom Cursor jumps to top

SUB 27 commands Evaluated Not evaluated

Turning pages with EPG (analogue)

Last program Selected program "now"

SPDIF-out TV

PIP within EPG

Sound AURO

O On

EPG test mode

Free

Idle mode in stand by (since M2 B11) No Yes

Alignement function No.

Byte 4

Byte 5

Option Bytes Table

Adjusted in the factory

tuoemitoNtuoemiTC

“0” “1”

O On

Yes No

O On

O

Yes

O

Enabled

O On

Blocked

Meaning

Alignement function No.

L D H

Free

Hotel Mode

EPG RAM Test

Byte 6

Free

Automatic switch on in VT mode No Yes

FRC noise reduction (DVD) On O

VT subpages mode Normal O

Filmmode DEBUG

Program search Normal Test mode (ne search)

Histogram DEBUG

FRC Anti-Clutter

Byte 7

HALO reduction

AV2-Monitor for C-Box

Assessing the 16:9 switching voltage

staircase reduction

Option Bytes Table

Adjusted in the factory

Without

controlled by event

5 1

split screen (with/without |+)

niP7

(Sub 0 deactivated)

only second subsystem

SCART 1

Rear Audio In

Not improved

“0” “1”

Meaning

Factory mode No Yes

Free

With

Front socket

controlled by level

O

Dynam. Bass (MICRONAS)

AV switching tension

full picture (with/without |+)

O

Image+ split screen mode

Image+ last memory

O

Auto on (warm up)

Chroma output at AV1

Ext. receiver in VT mode Autom. channel recognition No autom. recognition

Also for not used switch Only for not used switch

Sub0 + second subsystem

Cinch

Subsystem for service

VGA sound input

Front Audio In

Audio Input

DiSEqC Telegramm

Improved since B2 M12

Algorithm for VT-eye-height

Free

Alignement function No.

Byte 8

Byte 9

Option Bytes Table

Adjusted in the factory

new

manual

RC5

Yes (Sound problem Luxembourg)

disabled

“0” “1”

Meaning

O

Possible Not possible

Signal peaks (only LCD) Yes

Program change in overview

enabled

Special Peaking Settings SECAM

SECAM LTI

automatic

Correction of MSP registers

RC4 old

Not RC5

Remote Control

Video AGC

Alignement function No.

Byte 10

Service menu L2650 (LCD)

-3

-68

| Panel service

| Y delay | UV delay

-6

| General V | General H | Station table V | Station table H

| Red | Green | Blue

Service

| Adjust

| Stop | Start

| Bit 0 | Bit 1 Bit 2 | Bit 3 | Bit 4 | Bit 5 | Bit 6 | Bit 7

System data

Chassis L2650

| 0099 (Program)

TV application software version V3.0 ACQ_02.08.00 TDC_V01.06.00

TV application software code 29.06.05

TV EAROM code L00501

Operating time D: 53h P: 235h L: 34h

Firmware FPGA version V2.1

EDID-HDMI date version B500

Firmware I2CUART version V2.0 32162_051

DVB bootsoftware version V3.1.3

DVB application software version V3.5.10

DVB application software date 24.06.2005

DVB EAROM V1.6.0

| off | on

| mode | Welcome screen | Info station

| off | on

Software loading

1 Update of the main software (operating soft-

ware)

To update the software you need the „Programmer“ (Article number L87933050) and the update program „Flasher“. Please act according the following procedure:

- Switch off the TV set with the mains switch.

- Connect the Programmer with the L-Link cable to the service socket at the TV.

- Start the Flasher software and select „Step 2“ (see ﬁ g. 1).

...and select the new software version (see ﬁ g. 4).

ﬁ g. 4

With selecting „Open“ the update process will start automatically (see ﬁ g. 5).

ﬁ g. 1

- Switch on the TV set with the mains switch now (TV does not switch on under this condition) - see ﬁ g. 2.

ﬁ g. 2

- Software automatically jumps to „Step 3“

- Now select „Auto program“ (see ﬁ g. 3) ...

ﬁ g. 5

- With the message „Flash programmed“ the update is ﬁ nished (ﬁ g. 6).

ﬁ g. 3

ﬁ g. 6

- Switch off the TV with the mains switch and disconnect the L-Link cable.

2. Update of the DVB Bootload- / Application software

To update the software you need the „Programmer“ (Article number L87933050) and the update program „Dvbpromer“.

Please act according to steps 1-6 shown in the following pictures:

Step 1

Step 2

Step 4

Step 5

Step 3

Step 6

Components Chart

Art. No.

65480.

V00

65480.

V10

65480.

V20

65480.

V30

65480.

V40

L2650

TV set type

058 x x x x

Signal Board 89445

059 x

Basic Board 89435 080 xxxxx

Connector Board 89194 050 xxxxx

IR Receiver/LED 89476 050 xxxxx

Control Unit Sharp 89477 050 xxxxx

AQUOS

LC-26GD7E

AQUOS

LC-26GD7F

AQUOS

LC-26GD7K

AQUOS

LC-26GD7R

AQUOS

LC-26GD7I

Components

LCD Panel Kit

LC-26GS7L

Remote Control

Sharp GD7

Retrofit Kit

89446 002 xxxxx

Tuner/IF 89222 064 x xxxx

32534 x xxxxx

Technical speciﬁ cations

LC-26GD7E

General

Art. No. 65480 Dimensions with tablestand (mm) 663x556x278 (WxHxD) Dimensions without tablestand (mm) 663x504x118 (WxHxD) Picture format 16:9 Screen diagonal in cm 65 Picture resolution 1366x768 Contrast ratio 800:1 Viewing angle horizontal and vertical 170 Weight with tablestand (kg) approx. 15.7 Rated power IEC 62087 (watts) 70 Power consumption on standbý (watts) < 3 Ambient temperature ( Relative humidity 20 ... 80% (no condensation) Air pressure (HPa) 800 ... 1114 (0 ... 2000m above sea level)) Chassis L 2650 Power supply 220 V - 240 V / 50-60 Hz Tuner VHF/UHF/cable Hyperband 8 MHz 41 MHz to 860 MHz Station memory 1680 TV standards B/G, I, L, D/K, M, N Colour standards PAL SECAM, NTSC-V, PAL 60 Hz Audio standards mono/stereo/2-sound Nicam B/G, I, L, Virtual Dolby Audio rated output (watts) 2 x 20 / 6 Ohm Analogue teletext TOP/FLOF Level 2.5 Teletext page memory 3500 Digital teletext (UK only) MHEG-5

C) 5-35

Connections

Jack 3.5 mm Headphone 32-2000 Ohm EXT 4 Mini-DIN Video IN Y/C (S-VHS/Hi 8) EXT 4 (yellow) Video IN CVBS (VHS/8 mm) Cinch (white/red) Audio IN L/R IEC socket 75 ohms (*5V/80mA) Antenna/cable/DVB-T *F socket 75 ohms 13/18V/350 mA ANT-SAT EXT 1 Video IN Y/C (S-VHS/Hi 8) CVBS (VHS/8 mm)

RGB, YUV Video OUT CVBS Y/C (with SVHS AV link only) Audio IN L/R Audio OUT L/R EXT 2 Video IN Y/C (S-VHS/Hi 8) CVBS (VHS/8 mm) Video OUT CVBS (VHS/8 mm) Y/C (S-VHS/Hi 8) Audio IN L/R Audio OUT L/R Cinch Audio IN max. 2Vrms Center 2 x Cinch Audio IN L/R 2 x Cinch Audio OUT L/R EXT 3 (Cinch) COMPONENT IN Cb/Pb signal COMPONENT IN Cr/Pr signal COMPONENT IN Y signal Cinch Digital Audio IN (SPDIF)

digital sound

Cinch Digital Audio OUT (SPDIF)

digital sound EXT 5 Digital video/audio IN type A 19-pole digital picture and sound PC IN VGA/XGA IN PC/STB picture signal Mini DIN Service/S-Link

* Devices with digital satellite tuner

Troubleshooting for LCD-Controller and MICOM-Board

No picture comes out.

Check P2304 (RM) #4pin Check P2304 (RM) #8pin

H and L

Check the power unit.

L and H only

Is the Backlight off?

To "The backlight does not go on."

YES

Blinking once? (At regular intervals)

Check the power unit. CCKM and D5V line are not defective.

Blinking once?

To "The backlight does not go on."

Blinking twice?

Check the panel power supply circuit.

Blinking five times?

Blinking six times?

Blinking seven times?

Check the temperature of the set.

Check the temperature of the 1-bit amplifier unit.

YES

Is there the clock output at pin (26) of IC4601?

YES

Does the adjustment process menu appear?

YES

Check IC4701, IC4901 and their peripheral circuits.

Check the FFC (LV, SC4601) connections.

Check IC4501 and its peripheral circuits.

TROUBLE SHOOTING TABLE (Continued)

LED flashing patterns for error notification

250 ms 1 sec

1) Red power LED Remarks

Error type Red power LED operation (one cycle)

"Pin" means a monitoring microcomputer pin.

H: On

Lamp failure

1 quick flash

L: Off

H: On 2) Refer to "Details of power failure".

Power failure

2 flashes

L: Off

Communication failur

H: On 3) Refer to "Details of communication failure".

between main CPUs

Communication line failure or main CPU communication failure → Check debug statements for the main CPU.

3 flashes

L: Off

H: On

Monitor temp. failure

5 flashes

L: Off

2) Details of power failure

(2 flashes of power LED and then flashes of alarm LED) Remarks

Error type Alarm LED operation (one cycle)

"Pin" means a monitoring microcomputer pin, unless otherwise noted.

H: On

15 V failure

1 flash

L: Off

H: On

2 flashes

L: Off

H: On

9 V (A) failure

3 flashes

L: Off

H: On

VSH 3.3 V failure

4 flashes

L: Off

H: On

3.3 V failure

5 flashes

L: Off

H: On

6 flashes

L: Off

3) Details of communication failure

(3 flashes of power LED and then flashes of alarm LED)

Remarks

Error type Alarm LED operation (one cycle)

Initial communication

H: On

reception failure

1 flash

L: Off

Start-up reason

H: On

reception failure

2 flashes

L: Off

Regular communicati

H: On

failure

3 flashes

L: Off

H: On

Restart failure

4 flashes

L: Off

Power LED: P2304 (RM), pin

Alarm LED: TP2301 (IC2301, pin 22)

LCD controller PWB

Basically, communication logs are analyzed by a bus monitor or debug print logs are analyzed.

L_FL_ERR (pin 73) is defect (L). 5 sequential flashes at 1 second intervals indicate a lamp failure (failure can be detected only while the backlight is on).

Be aware that the lamp failure detecting operation is not activated except in the monitoring process after the LED has flashed 5 times in total.

The total number of flashes is cleared to 0 by the setting in the monitoring process or after the LED lit up for 30 minutes in a row.

If the panel temperature is 60˚C or more for 15 seconds or more in a row, CAUTION appears on the OSD of AVC (flashes in red in the lower right screen).

If the panel temperature is 60˚C or more for 25 seconds or more in a row, the error standby is activated.

(OSTEMP in monitoring process OTHER 2: thermistor AD value appears, TEMP ERR in page FAN: temperature failure AD value is changed): thermistor

Not used

Detected during start-up and operation (interruption)

FREERUN (pin 59) or STB (pin 32) is defect (L). 3.3 V is not applied to the LCD controller.

CSEN1 (pin 34) is defect (L).

VSH_IN (pin 36pin) is defect (H). VSH 3.3 V is not applied.

Detected during start-up and operation (interruption)

15V_CHK (pin 31) is defect (L). 15 V is not applied.

Detected only during start-up. When the error is detected during operation, the projector is restarted by an interrupt handling (instantaneous blackout processing).

Not used

→ Main CPU start-up failure or monitoring microcomputer's reception failure

Regular communication that is performed at 1 second intervals in the normal operation is interrupted.

→ Main CPU operation failure or monitoring microcomputer's reception failure

Detected during start-up and operation (interruption). FREERUN is checked during start-up and STB is checked while light is on.

When the projector is restarted by program such as standby on/off, notice for the completion of restart is not received.

→ Main CPU restart failure or monitoring microcomputer's reception failure

Initial communication from the main CPU is not received. (Request for the monitor model No. is not received.)

→ Communication line failure or main CPU start-up failure

Reason for start-up is not received from the main CPU. (Start-up communication to start-up reason notification 22h is not received.)

Troubleshooting for LCD-Controller and MICOM-Board

NOTE: Connect a LED to P2304 for blinking codes

Troubleshooting for LCD-Controller and MICOM-Board

TROUBLE SHOOTING TABLE (Continued)

Data dropout (relating to gray scale)

Set PATTERN1 PATTERN1 on the adjustment process menu to "2". Is the gray scale pattern displayed correctly?

Set PATTERN1 PATTERN3 on the adjustment process menu to "1". Is the gray scale pattern displayed correctly?

Set PATTERN1 PATTERN3 on the adjustment process menu to "4". Is the test pattern displayed correctly at intervals of one dot?

Set PATTERN1 PATTERN3 on the adjustment process menu to "5". Is the test pattern displayed correctly at intervals of one dot?

Check the peripheral circuits of IC4602.

Is OSTEMP.AD on Page 1 of the process adjustment mode set at 255?

Is the harness connected correctly between the inverter GND PWB and LCD control PWB?

Is the input voltage at pin (62) of IC2004 (microprocessor) 5V?

The thermistor on the inverter GND PWB is faulty.

←

YES

Noise is caused to the moving picture with the QS drive on.

YES

Check the connection between SC4651 and SC4652 and check the peripheral circuits of IC4501.

Check IC4702, IC4902 and their peripheral circuits.

Check the line between IC4701 and IC4501.

Check the line between IC4901 and IC4501.

Check IC4701 and IC4901 and their peripheral circuits.

Connect the harness correctly or replace it.

Pin (62) of IC2004 (microprocessor) is faulty.

The backlight does not go on.

Is any of the fuses in the power supply unit blown?

Is power supplied to the inverter PWB?

Is the harness connected correctly between the PWBs (power unit, inverter PWB, inverter GND PWB and LCD control PWB)?

Connect the harness correctly or replace it.

Set PATTERN1 PATTERN3 on the adjustment process menu to "1". Is the gray scale pattern displayed correctly?

Disconnect the FPC from SC4651 and SC4652. (To protect the panel against damage)

Check the power supply voltage supplied to the panel (check at SC4651 and SC4652).

←

The whole screen is whitish (LCD power supply).

YES

Check the inverter circuit located downstream from the blown

Check the connector and inverter circuit of each fluorescent lamp.

YES

Is the control signal applied to P7705 of LCD Control PWB?

Check the peripheral circuits of IC4501.

Check the video signal circuit.

Appendix

AV connector board L2650 Var. 050/051

W212

1polsXH

W521

JST ws l

R313

47R

Var.051: not mounted

R314

47R

BAS316

D391

D392

C391

270p

Var.051 only

C321

270p

R316

47R

Var.051:

not mounted

C311

270p

R315

47R

C448

10n

C418

C12V

D334

Var.051 only

C12V0

D332

D331

D333

C12V

R330

C12V0

47R

R328

47R

R336

75R

R332

R331

C491

270p

D492

BAS316

D491

BAS316

L447

6u8

75R

R447

6u8

L417

Kl.3.5

W451

R417

75R

R337

75R

778

W351

Combination jack

Var.050:9311A

Var.051:9311F

Connector board P.C.B 89194A - components side Connector board P.C.B 89194A - solder side

D492

D491

C491

R417

R447

W212

C418

C448

R337

W521

L417

111

W351

L447

D334

D333

R336

D332

D331

R331

R328

R332

R330

R316

R314

C311

R313

R315

C321

D392

D391

C391

W451

+ 67 hidden pages