LD L1750S Schematic

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Page 1

Service Guide Specification

담 당 관리자

Model Description

MODEL

SUFFIX

L1750S-SNN L1950S-SNN

ANUSQG

Printing Specification

1. Trim Size (Format) : 215mm x 280 mm

2. Printing Colors

• Cover : LG COLORS

• Inside : Black

3. Stock (Paper)

• Cover : Snow White 150 g/㎡

• Inside : Snow White 100 g/㎡

4. Printing Method :

5. Bindery : Saddle stitch

6. Language : English

7. Number of pages : 28 ( Including blank 1page)

BRAND

Product Name

FLATRON L1750S FLATRON L1950S

LEE H.J

05.01.06

Part No.

KIM J.O

05.01.06

3828TSL096P

Special Instructions3.

(1) Origin Notification

* LGEDI : Printed in Indonesia * LGEWA : Printed in U.K. * LGESP : Printed in Brazil * LGEMX : Printed in Mexico * LGENT : Printed in China * LGEIL : Printed in India

Changes

7 6

5 4 3 2

REV.

MM/DD/YY

NO.

SIGNATURE

CHANGE NO.

CHANGE CONTENTS

Page 2

Pagination sheet

P/NO.3828TSL096P Total pages : 28pages

Cover

Front cover

Inside

blank

English….English

English

….

English25Rear cover

English

…..

Inside

Rear

Cover

Page 3

COLOR MONITOR

SERVICE MANUAL

Website:http://biz.LGservice.com

E-mail:http://www.LGEservice.com/techsup.html

CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS NO. : CL-82

MODEL: L1750S (L1750S-SNN.AN**QF)

L1950S (L1950S-SNN.AN**QF)

( ) **Same model for Service

*To apply the Genesis ZAN3SL Chip.

Page 4

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Page 5

CONTENTS

SPECIFICATIONS ................................................... 2

PRECAUTIONS ....................................................... 3

TIMING CHART ....................................................... 7

DISASSEMBLY ....................................................... 8

BLOCK DIAGRAM ................................................... 9

DESCRIPTION OF BLOCK DIAGRAM...................10

ADJUSTMENT ...................................................... 12

SPECIFICATIONS

1. LCD CHARACTERISTICS

Type : TFT Color LCD Module Active Display Area : 17 inch diagonal-L1750S

: 19 inch diagonal-L1950S

Pixel Pitch : 0.264 (H) x 0.264 (V)-L1750S

: 0.294 (H) x 0.294 (V)-L1950S

Size : Color Depth : 16.2M colors

Electrical Interface : LVDS Surface Treatment : Hard-coating(3H), Anti-Glare Operating Mode : Backlight Unit :

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio ≥ 10

L1750S

Left : -60° min., -70°(Typ) Right : +60° min., +70°(Typ) Top :+45° min., +60°(Typ) Bottom : -50°min., -60°(Typ)

L1950S

Left : -70° min., -80°(Typ) Right : +70° min., +80°(Typ) Top :+75° min., +85°(Typ) Bottom : -75°min., -85°(Typ)

2-2. Luminance : 185(min), 250(Typ) 2-3. Contrast Ratio : 300(min), 450(Typ)-L1750S

3. SIGNAL (Refer to the Timing Chart)

3-1. Sync Signal

• Type : Separate Sync, SOG (Sync On Green)

3-2. Video Input Signal

1) Type : R, G, B Analog

2) Voltage Level : 0~0.71 V a) Color 0, 0 : 0 Vp-p b) Color 7, 0 : 0.467 Vp-p c) Color 15, 0 : 0.714 Vp-p

3) Input Impedance : 75 Ω

358.5 (W) x 296.5 (H) x 17.0 (D)-L1750S

404.2 (W) x 330 (H) x 22.0 (D)-L1950S

Normally White, 4-CCFL(Cold Cathode Fluorescent Lamp)

: 300(min), 500(Typ)-L1950S

Transmissive mode

SERVICE OSD ...................................................... 13

TROUBLESHOOTING GUIDE .............................. 14

WIRING DIAGRAM ............................................... 18

EXPLODED VIEW...................................................19

REPLACEMENT PARTS LIST ...............................21

SCHEMATIC DIAGRAM......................................... 23

5. POWER SUPPLY

5-1. Power 5-2. Power Consumption

POWER ON (NORMAL)

STAND-BY

SUSPEND

DPMS OFF

6. ENVIRONMENT

6-1. Operating Temperature: 10°C~35°C (50°F~95°F) 6-2. Relative Humidity : 10%~80% 6-3. MTBF :

7. DIMENSIONS (with TILT/SWIVEL) L1750S

Width : 368 mm (14.49'') Depth : 230.5 mm (9.07'') Height : 389.2 mm (15.32'')

L1950S

Width : 413 mm (16.26'') Depth : 230.5 mm (9.07'') Height : 421.4 mm (16.59'')

8. WEIGHT (with TILT/SWIVEL) L1750S

Net. Weight : 4.9 kg (10.80 lbs) Gross Weight : 6.5 kg (14.33 lbs)

: AC 100~240V, 50/60Hz , 1.0A

MODE

Lamp Life :

H/V SYNC

ON/ON

OFF/ON ON/OFF

OFF/OFF

VIDEO

ACTIVE

OFF OFF OFF

50,000 HRS wiht 90% Confidence level 50,000 Hours (min)

POWER CONSUMPTION

less than 43 W-L1750S less than 45 W-L1950S

less than 1 W less than 1 W

less than 1 W

(Ambient)

(Non-condensing)

LED COLOR

GREEN

AMBER AMBER AMBER

3-3. Operating Frequency

Horizontal : 30 ~ 83kHz Vertical : 56 ~ 75Hz

. Max. Resolution

Analog : 1280 x 1024 / 75Hz

L1950S

Net. Weight : 5.7 kg (12.57 lbs) Gross Weight : 7.9 kg (17.42 lbs)

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Page 6

PRECAUTION

1.5 Kohm/10W

To Instrument's exposed METALLIC PARTS

Good Earth Ground such as WATER PIPE, CONDUIT etc.

AC Volt-meter

WARNING FOR THE SAFETY-RELATED COMPONENT.

• There are some special components used in LCD monitor that are important for safety. These parts are

marked on the schematic diagram and the replacement parts list. It is essential that these critical

parts should be replaced with the manufacturer’s specified parts to prevent electric shock, fire or other hazard.

• Do not modify original design without obtaining written permission from manufacturer or you will void the original parts and labor guarantee.

TAKE CARE DURING HANDLING THE LCD MODULE WITH BACKLIGHT UNIT.

• Must mount the module using mounting holes arranged in four corners.

• Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

• Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel.

WARNING

BE CAREFUL ELECTRIC SHOCK !

• If you want to replace with the new backlight (CCFL) or inverter circuit, must disconnect the AC adapter because high voltage appears at inverter circuit about 650Vrms.

• Handle with care wires or connectors of the inverter circuit. If the wires are pressed cause short and may burn or take fire.

Leakage Current Hot Check Circuit

• Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

• Make certain that treatment person’s body are grounded through wrist band.

• Do not leave the module in high temperature and in areas of high humidity for a long time.

• The module not be exposed to the direct sunlight.

• Avoid contact with water as it may a short circuit within the module.

• If the surface of panel become dirty, please wipe it off with a softmaterial. (Cleaning with a dirty or rough cloth may damage the panel.)

CAUTION

Please use only a plastic screwdriver to protect yourself from shock hazard during service operation.

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Page 7

SERVICING PRECAUTIONS

CAUTION: Before servicing receivers covered by this

service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First.

General Servicing Precautions

1. Always unplug the receiver AC power cord from the AC power source before; a. Removing or reinstalling any component, circuit

board module or any other receiver assembly.

b. Disconnecting or reconnecting any receiver electrical

plug or other electrical connection.

c. Connecting a test substitute in parallel with an

electrolytic capacitor in the receiver. CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.

d. Discharging the picture tube anode.

2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc".

3. Discharge the picture tube anode only by (a) first connecting one end of an insulated clip lead to the degaussing or kine aquadag grounding system shield at the point where the picture tube socket ground lead is connected, and then (b) touch the other end of the insulated clip lead to the picture tube anode button, using an insulating handle to avoid personal contact with high voltage.

4. Do not spray chemicals on or near this receiver or any of its assemblies.

5. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cottontipped stick or comparable non-abrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99% strength) CAUTION: This is a flammable mixture. Unless specified otherwise in this service manual, lubrication of contacts in not required.

6. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped.

7. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed.

8. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last.

9. Use with this receiver only the test fixtures specified in

this service manual.

CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by static by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static type solder removal device. Some solder removal devices not classified as "antistatic" can generate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.)

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Page 8

General Soldering Guidelines

1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip

temperature within the range or 500。F to 600。F.

2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.

3. Keep the soldering iron tip clean and well tinned.

4. Thoroughly clean the surfaces to be soldered. Use a mall wire-bristle (0.5 inch, or 1.25cm) brush with a metal handle. Do not use freon-propelled spray-on cleaners.

5. Use the following unsoldering technique a. Allow the soldering iron tip to reach normal

temperature.

(500。F to 600。F) b. Heat the component lead until the solder melts. c. Quickly draw the melted solder with an anti-static,

suction-type solder removal device or with solder

braid.

CAUTION: Work quickly to avoid overheating the

circuitboard printed foil.

6. Use the following soldering technique. a. Allow the soldering iron tip to reach a normal

temperature (500。F to 600。F)

b. First, hold the soldering iron tip and solder the strand

against the component lead until the solder melts.

c. Quickly move the soldering iron tip to the junction of

the component lead and the printed circuit foil, and hold it there only until the solder flows onto and around both the component lead and the foil. CAUTION: Work quickly to avoid overheating the circuit board printed foil.

d. Closely inspect the solder area and remove any

excess or splashed solder with a small wire-bristle brush.

IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above.

Removal

1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts.

2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC.

Replacement

1. Carefully insert the replacement IC in the circuit board.

2. Carefully bend each IC lead against the circuit foil pad and solder it.

3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas).

"Small-Signal" Discrete Transistor Removal/Replacement

1. Remove the defective transistor by clipping its leads as close as possible to the component body.

2. Bend into a "U" shape the end of each of three leads remaining on the circuit board.

3. Bend into a "U" shape the replacement transistor leads.

4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection.

Power Output, Transistor Device Removal/Replacement

1. Heat and remove all solder from around the transistor leads.

2. Remove the heat sink mounting screw (if so equipped).

3. Carefully remove the transistor from the heat sink of the circuit board.

4. Insert new transistor in the circuit board.

5. Solder each transistor lead, and clip off excess lead.

6. Replace heat sink.

Diode Removal/Replacement

1. Remove defective diode by clipping its leads as close as possible to diode body.

2. Bend the two remaining leads perpendicular y to the circuit board.

3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board.

4. Securely crimp each connection and solder it.

5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder.

Fuse and Conventional Resistor Removal/Replacement

1. Clip each fuse or resistor lead at top of the circuit board hollow stake.

2. Securely crimp the leads of replacement component around notch at stake top.

3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.

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Page 9

Circuit Board Foil Repair

Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered.

At IC Connections

To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).

1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary).

2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.

3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection.

4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.

At Other Connections

Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.

1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens.

2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern.

3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges.

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Page 10

TIMING CHART

VIDEO

SYNC

<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>

Mode

Sync

H/V

Polarity

Sort

H + 31.469 800 640 16 96 48 V – 70.09 449 350 37 2 60 H – 31.468 900 720 18 108 54 V + 70.08 449 400 12 2 35

H – 31.469 800 640 16 96 48 V – 59.94 525 480 10 2 33 H – 37.5 840 640 16 64 120 V – 75 500 480 1 3 16

H + 37.879 1056 800 40 128 88 V + 60.317 628 600 1 4 23 H + 46.875 1056 800 16 80 160 V + 75.0 625 600 1 3 21 H+/– 49.725 1152 832 32 64 224 V+/– 74.55 667 624 1 3 39 H – 48.363 1344 1024 24 136 160 V – 60.0 806 768 3 6 29 H – 60.123 1312 1024 16 96 176 V – 75.029 800 768 1 3 28 H+/– 68.681 1456 1152 32 128 144 V+/– 75.062 915 870 3 3 39 H+/– 61.805 1504 1152 18 134 200 V+/– 65.96 937 900 2 4 31 H + 63.981 1688 1280 48 112 248 V + 60.02 1066 1024 1 3 38 H + 79.976 1688 1280 16 144 248 V + 75.035 1066 1024 1 3 38

Dot

Clock

25.175

28.321

25.175

31.5

40.0

49.5

57.283

65.0

78.75

100.0

92.978

108.0

135.0

Frequency

Total Period

(E)

Video Active Time

(A)

Front Porch

(C)

Sync Duration

(D)

Back Porch

(F)

Resolution

640x350

70Hz

720x400

70Hz

640x480

60Hz

640x480

75Hz

800x600

60Hz

800x600

75Hz

832x624

75Hz

1024x768

60Hz

1024x768

75Hz

1152x900

75Hz

1152x900

65Hz

1280x1024

60Hz

1280x1024

75Hz

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Page 11

DISASSEMBLY

# 1

# 3

Disassembly Hinge Cover.

# 2

Remove the screws.

# 4

# 5

# 7

1. Pull the front cover upward.

2. Then, let the all latches are separated.

3. Put the front face down.

Remove the 6 screws from each up of metal

frame

Disassemble back cover

# 6

Pell off Al-tape from panel.

# 8

Remove Al-tape from control pcb fix.

Remove the 4 screws from each side of metal frame

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Page 12

BLOCK DIAGRAM

Panel

LVDS

Transmitter

OSD

Scaling

Switch

(System)

MOD-ON

EEPROM

(System)

MCU

3.3 V

1.8 V

Regulator

gmZAN3SL

ADC

3.3 V

Analog(R/G/B)

PLL

1.8 V

D-Sub

To Key Control

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LIPS

BRT-CTL

INV-CTL

Inverter

Power +

Page 13

DESCRIPTION OF BLOCK DIAGRAM

1. Video Controller Part.

This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the digital video signal using a pixel clock. The pixel clock for each mode is generated by the PLL. The range of the pixel clock is from 25MHz to 135MHz. This part consists of the Scaler, ADC, LVDS transmitter. The Scaler gets the video signal converted analog to digital, interpolates input to 1280 X 1024 resolution signal and outputs 8-bit R, G, B signal to transmitter.

2. Power Part.

This part consists of the one 3.3V regulator, and one 1.8V regulator to convert power which is provided 12V, 5V in Power board. 5V is provided for LCD panel and Micom. Also, 5V is converted 3.3V by regulator and 3.3V is converted 1.8V by regulator. Converted power is provided for IC in the main board.

3. MICOM Part.

This part consists of EEPROM IC which stores control data, Reset IC and the Micom. The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable. The controlled data of each modes is stored in EEPROM.

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Page 14

LIPS Board Block Diagram

50 ~ 60Hz

EMI

COMPONENTS

INPUT RECTIFIER

AND FILTER

HVDC

ENERGY

TRANSFER

100KHz

OUTPUT RECTIFIER

AND FILTER

LINE

100 ~ 240V

PWM CONTROL

CIRCUIT

PHOTO

ISOLATION

-COUPLER

SIGNAL

COLLECT-

PRIMARY SECONDARY

12V

INVERTER CIRCUIT

Operation description_LIPS

1. EMI components.

This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR, the circuit included a line-filter, across line capacitor and of course the primary protection fuse.

High Voltage output

12V

GND

2. Input rectifier and filter.

This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk capacitor.

3. Energy Transfer.

This part function is transfer the primary energy to secondary through a power transformer.

4. Output rectifier and filter.

This part function is to make a pulse width modulation control and to provide the driver signal to power switch, to adjust the duty cycle during different AC input and output loading condition to achive the dc output stablize, and also the over power protection is also monitor by this part.

5. Photo-Coupler isolation.

This part function is to feed back the dc output changing status through a photo transistor to primary controller to achieve the stabilized dc output voltage.

6. Signal collection.

This part function is to collect the any change from the dc output and feed back to the primary through photo transistor.

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Page 15

ADJUSTMENT

Windows EDID V1.0 User Manual

Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup

Windows 2000, XP => Need to Port Setup.

This program is available to LCD Monitor only.

1. Port Setup a) Copy “UserPort.sys” file to

“c:\WINNT\system32\drivers” folder

b) Run Userport.exe

c) Remove all default number d) Add 300-3FF

2. EDID Read & Write

1) Run WinEDID.exe

2) Edit Week of Manufacture, Year of Manufacture, Serial Number a) Input User Info Data b) Click “Update” button c) Click “ Write” button

e) Click Start button. f) Click Exit button.

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Page 16

220

IBM Compatible PC

Video Signal Generator

PARALLEL PORT

Power inlet (required)

Power LED

ST Switch

Power Select Switch (110V/220V)

Control Line

Not used

RS232C

PARALLEL

V-SYNC

POWER

VGS

MONITOR

V-Sync On/Off Switch (Switch must be ON.)

4.7K

74LS06

OFF ON

OFF

SERVICE OSD

1) Turn off the power switch at the front side of the display.

2) Wait for about 5 seconds and press MENU, POWER switch with 1 second interval.

3) The SVC OSD menu contains additional menus that the User OSD menu as described below.

a) Auto Color : W/B balance and Automatically sets the gain and offset value. b) NVRAM INIT : EEPROM initialize.(24C08) c) CLEAR ETI : To initialize using time. d) AGING : Select Aging mode(on/off). e) R/G/B-9300K : Allows you to set the R/G/B-9300K value manually.

f) R/G/B-6500K : Allows you to set the R/G/B-6500K value manually. g) R/G/B-Offset : Allows you to set the R/G/B-Offset value manually.(Analog Only) h) R/G/B-Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only)

i) MODULE : To select applied module.

Figure 1. Cable Connection

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Page 17

NO POWER

(POWER INDICATOR OFF)

TROUBLESHOOTING GUIDE

1. NO POWER

CHECK J705 VOLTAGE

PIN5, PIN6 (5V)?

CHECK

U801 PIN 1& U803

PIN 3 VOLTAGE

(5V) ?

CHECK

Q803 PIN 3(3.3V) &

U803 PIN 4 (1.8V)?

CHECK KEY CONTROL

CONNECTOR ROUTINE

YES

CHECK POWER BOARD, AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE

CHECK U801.

CHECK 5VR LINE (OPEN CHECK)

NO PROBLEM

IS U201

VOLTAGE REPEATED

CHECK IIC LINE CONNECTION

PIN88

AS PULSE

SHAPE ?

YES

(U501, U502)

Waveforms

1 2

J705-#5, 6 / U801-#1/U803-#3 U201-#88

CHECK U201 VCC, XTAL, RESET

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Page 18

2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS

NO RASTER

(OSD IS NOT DISPLAYED)

PIN5, PIN 6

5V?

J705

3 4

J705 PIN9

2.5V?

J705 PIN10

5V?

CHECK

PULSE AS

CONTACTING SCOPE

PROBE TO CAUTION LABEL.

(CONTACT PROBE TO

CAUTION LABEL.

CAN YOU SEE PULSE

AT YOUR

SCOPE?

YES

CHECK LIPS

CHECK MICOM INV ON/OFF PORT. (U501 PIN9)

1. CONFIRM BRIGHTNESS OSD CONTRL STATE.

2. CHECK MICOM DIM-ADJ PORT(U501 PIN41)

LIPS

REPLACE CCFL LAMP

IN THE LCD MODULE

Waveforms

J705-#5, 6 / U801-#1/U803-#3

YES

3 4

J705-#9 J705-#9

Inverter Off

Micom Port check

J705 Inverter output

- 15 -

Inverter On

Micom Port check

J705 Inverter output

Page 19

3. NO RASTER (OSD IS NOT DISPLAYED) – gmZAN3SL

NO RASTER

(OSD IS NOT DISPLAYED)

U201

POWER PINS

3.3V?

U201

PIN88

OSCILLATE AS

12MHZ?

5 6

U501

PIN43 IS 64KHz H-SYNC?

PIN44 IS 60Hz V-SYNC?

IS PULSE APPEARED

AT SIGNAL PINS?

YES

CHECK U803, U801

1. CHECK PIN88 SOLDERINGCONDITION

2. CHECK X501

3. TROUBLE IN U201

CHECK CONNECTION LINE FROM U201 TO U501

TROUBLE IN CABLE

OR LCD MODULE

Waveforms

U501 PIN8

5V?

YES

U501-#43

- 16 -

CHECK 5VR LINE

U501-#44U201-#88

Page 20

4. NO RASTER (OSD IS DISPLAYED) – gmZAN3SL

NO RASTER

(OSD IS DISPLAYED)

U201

POWER PIN99(1.8V)

PIN33(3.3V)?

YES

CHECK

R,G,B INPUT?

U201 PIN 70,74,77

YES

CHECK

H-SYNC INPUT

U201 PIN 95?

YES

CHECK

V-SYNC INPUT

U201 PIN 96?

CHECK U803, U801

1. CHECK PC

2. CHECK SIGNAL CABLE & D-SUB CONNECTOR LINE

CHECK H-SYNC LINE (D-SUB→U501→U201 PIN95)

CHECK V-SYNC LINE (D-SUB→U501→U201 PIN96)

YES

TROUBLE IN

LCD MODULE

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Page 21

WIRING DIAGRAM

Connector Ass’y P/N

or 6631T11020W

6631T11012W

Connector Ass’y P/N:

6631T20023A

6631T20034M

- 18 -

Connector Ass’y P/N:

6631T11017X-L1750S 6631T11017Y-L1950S

Page 22

060

100

030

090

080

070

EXPLODED VIEW

020

010

040

050

110

- 19 -

Page 23

EXPLODED VIEW PARTS LIST

Ref. No.

010

020

030

040

050

060

070

080

090

100

110

Part No.

3091TKL143N CABINET ASSEMBLY, L1750S BRAND L122 SILVER PC+ABS,89483 TCO03 US-VER 3091TKL143R CABINET ASSEMBLY, L1750S BRAND L122 SILVER PC+ABS TCO03+12MS FLATRON N-C/SKD 3091TKL144N CABINET ASSEMBLY, L1950S BRAND L123 SILVER PC+ABS,89483 TCO03 3091TKL144Q CABINET ASSEMBLY, L1950S BRAND L123 SILVER PC+ABS 12MS+TCO03, US N-C/SKD

6304FLP110B or 6304FLP086A or 6304FLP194A or 6304FLP110A or 6304FLP160A

6304FLP142A or 6304FLP184A

3809TKL100E BACK COVER ASSEMBLY, L1750S L100 PC+ABS 9930(BK) US-VER

3809TKL100G BACK COVER ASSEMBLY, L1750S L100 PC+ABS 9930(BK) ANALOG US-VER E-C/SKD

3809TKL101E BACK COVER ASSEMBLY, L1950S L101 BRAND PC+ABS 9930(BK) US-VER

3809TKL101F BACK COVER ASSEMBLY, L1950S L101 BRAND PC+ABS 9930(BK) US-VER E-C/SKD

3043TKK227A TILT SWIVEL ASSEMBLY, L1750S - TILT STAND BODY

3043TKK227C TILT SWIVEL ASSEMBLY, L1750S - TILT STAND BODY A-C/SKD 3043TKK227B TILT SWIVEL ASSEMBLY, L1950S - TILT STAND BODY. 3043TKK227D TILT SWIVEL ASSEMBLY, L1950S - TILT STAND BODY B-C/SKD 3043TKK228A TILT SWIVEL ASSEMBLY, L1750S - TILT STAND BASE 3043TKK228B TILT SWIVEL ASSEMBLY, LX 50S - TILT STAND BASE A-C/SKD 4951TKS199A METAL ASSEMBLY, FRAME MAIN L1750 LPL-A5 KUMI 4951TKS199B METAL ASSEMBLY, FRAME MAIN L1750 A-C/SKD 4951TKS200A METAL ASSEMBLY, FRAME MAIN L1950 LPL-E03 TN/AUO-EN04-V2 KUMI 4951TKS200C METAL ASSEMBLY, FRAME MAIN L1950 LPL-E03 TN/AUO-EN04-V2 A-C/SKD 6871TPT282C 6871TPT282Q

3313TL7087A MAIN TOTAL ASSEMBLY, L1750SN LPL ZAN3SL BRAND CL-66

3313TL7087E MAIN TOTAL ASSEMBLY, L1750SN LPL ZAN3SL MX C/SKD BRAND CL-82 LF

3313TL9078A MAIN TOTAL ASSEMBLY, L1950SN LPL ZAN3SL BRAND CL-66

3313TL9078E MAIN TOTAL ASSEMBLY, L1950SN LPL ZAN3SL MX C/SKD BRAND CL-82 LF

4951TKS203A METAL ASSEMBLY, REAR SHIELD LX50 KUMI 4951TKS203B METAL ASSEMBLY, REAR SHIELD LX50 KUMI A-C/SKD 3550TKK740A COVER, L1750 BACK DOOR BRAND 3550TKK740B COVER, L1750 BACK DOOR BRAND A-C/SKD 3550TKK741A COVER, L1950 BACK DOOR BRAND 3550TKK741B COVER, L1950 BACK DOOR BRAND A-C/SKD 6871TST798A PWB(PCB) ASSEMBLY,SUB, L1750 CONTROL TOTAL BRAND KEY 6871TST798C PWB(PCB) ASSEMBLY,SUB, L1750 CONTROL TOTAL BRAND MX C/SKD LF 6871TST911A PWB(PCB) ASSEMBLY,SUB, L1950 CONTROL TOTAL BRAND KEY 6871TST911C PWB(PCB) ASSEMBLY,SUB, L1950 CONTROL TOTAL BRAND MX C/SKD LF

LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A5N5 LG PHILPS TFT COLOR PART NUMBER CHANGE FOR COST COMPENSATION LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A5K6 LG PHILPS TFT COLOR LVDS SXGA OKI GATE D-IC LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A5K2 LG PHILPS TFT COLOR TI D-IC,250NITS,SXGA,LVDS LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A5N5 LG PHILPS TFT COLOR LPL NJ,250NITS,SXGA,LVDS LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A5KS LG PHILPS TFT COLOR NEC D-IC,250NITS,SXGA,LVDS LCD(LIQUID CRYSTAL DISPLAY), LM190E03-B4K1 LG PHILPS TFT COLOR 20T,TN,250NITS,SXGA,LVDS LCD(LIQUID CRYSTAL DISPLAY), LM190E03-B4N2 LG PHILPS TFT COLOR B4K1 LPL NJ,20T,TN,250NITS,SXGA,LVDS

PWB(PCB) ASSEMBLY,POWER, M-CHASSIS 1720 DOCKING,2PIN,450V POWER TOTAL LIEN CHANG PB FREE-L1750S PWB(PCB) ASSEMBLY,POWER, M-CHASSIS 19INCH TN & 1720 DOCKING,2PIN,450V POWER TOTAL LIEN CHANG PB FREE & ANALOG-L1950S

Description

- 20 -

Page 24

REPLACEMENT PARTS LIST

CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS,

READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL.

* NOTE : S SAFETY Mark

AL ALTERNATIVE PARTS

DATE: 2004. 12. 17.

*S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION

MAIN BOARD

CAPACITORS

C204 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C205 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C206 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C207 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C208 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C210 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C213 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C214 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C215 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C216 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C217 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C218 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C219 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C220 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C221 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C222 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C223 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C224 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C225 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C226 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C227 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C231 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C232 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C233 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C234 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C503 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C504 0CE106CK610 "10UF SHL,SD 50V 20% BULK FL" C506 0CC030CK01A 3PF 1608 50V 0.25 PF R/TP NP C507 0CC180CK41A 18PF 1608 50V 5% R/TP NP0 C508 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C701 0CK105CD56A 1UF 1608 10V 10% R/TP X7R C708 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C709 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C717 0CC101CK41A 100PF 1608 50V 5% R/TP NP0 C718 0CC101CK41A 100PF 1608 50V 5% R/TP NP0 C720 0CC680CK41A 68PF 1608 50V 5% R/TP NP0 C721 0CC680CK41A 68PF 1608 50V 5% R/TP NP0 C727 0CK105CD56A 1UF 1608 10V 10% R/TP X7R C732 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C733 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C734 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C735 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C801 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C803 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R-L1750S C819 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C820 0CE107EF610 "100UF KMG,RD 16V 20% FL BULK" C820 0CE107EF628 "100UF KMG,RD 16V 20% FM2.5 T"-C/SKD C821 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C829 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C831 0CE107EF610 "100UF KMG,RD 16V 20% FL BULK" C831 0CE107EF628 "100UF KMG,RD 16V 20% FM2.5 T"-C/SKD C832 0CE107EF610 "100UF KMG,RD 16V 20% FL BULK"-C/SKD

DATE: 2004. 12. 17.

*S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION

C832 0CE107EF628 "100UF KMG,RD 16V 20% FM2.5 T" C833 0CK105CD56A 1UF 1608 10V 10% R/TP X7R-L1950S C834 0CC102CK41A 1000PF 1608 50V 5% R/TP NP0-L1950S

DIODEs

D701 0DS226009AA KDS226 TP KEC SOT-23 80V 30 D702 0DS226009AA KDS226 TP KEC SOT-23 80V 30 D706 0DS226009AA KDS226 TP KEC SOT-23 80V 30 ZD701 0DZKE00138A KDZ5.6V KEC R/TP USC 0.2W 5. ZD702 0DZKE00138A KDZ5.6V KEC R/TP USC 0.2W 5. ZD703 0DZKE00138A KDZ5.6V KEC R/TP USC 0.2W 5. ZD704 0DZKE00138A KDZ5.6V KEC R/TP USC 0.2W 5. ZD705 0DZKE00138A KDZ5.6V KEC R/TP USC 0.2W 5. ZD711 0DZKE00138A KDZ5.6V KEC R/TP USC 0.2W 5.

ICs

U201 0IPRPGN016B "GMZAN3SL-BD-LF GENESIS 128P," U501 0IZZTSZ594A L1750SN ZAN3SL MICOM ASSY -L1750S U502 0ISG240860B "M24C08WMN6T(P),LF SGS-THOMSO" U801 0IPMGKE011A KIA78D33F KEC DPAK R/TP 3.3V U803 0IPMGSG019A "LD1117S18TR,LF STM SOT223 R/" Q502 0IKE704200H KIA7042AP TO-92 TP 4.2 VOLT

TRANSISTOR

Q503 0TR390409AE FAIRCHILD KST3904(LGEMTF) TP Q504 0TR390409AE FAIRCHILD KST3904(LGEMTF) TP Q505 0TR390409AE FAIRCHILD KST3904(LGEMTF) TP Q703 0TR390609FA KST3906-MTF TP SAMSUNG SOT2 Q704 0TR390609FA KST3906-MTF TP SAMSUNG SOT2 Q803 0TR127309AA KTA1273-Y(KTA966A) TP KEC TO-L1750S Q804 0TR390409AE FAIRCHILD KST3904(LGEMTF) TP-L1750S U802 0TFVI80023A VISHAY SI3865DV R/TP TSOP-6-L1950S

RESISTORs

R201 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R202 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R203 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R208 0RJ1200D677 120 OHM 1/10 W 5% 1608 R/TP R209 0RJ1200D677 120 OHM 1/10 W 5% 1608 R/TP R210 0RJ1200D677 120 OHM 1/10 W 5% 1608 R/TP R211 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R213 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R214 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R220 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R221 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R222 0RJ1004D677 1000000 OHM 1/10 W 5% 1608 R R506 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R508 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R514 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R515 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP

- 21 -

Page 25

DATE: 2004. 12. 17.

*S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION

DATE: 2004. 12. 17.

*S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION

R516 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R518 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R520 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R521 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R522 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R523 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R534 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R535 0RJ3301D677 3.3K OHM 1/10 W 5% 1608 R/TP R537 0RJ3301D677 3.3K OHM 1/10 W 5% 1608 R/TP R541 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R542 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R543 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R544 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R545 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R547 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R548 0RJ0332D677 33 OHM 1/10 W 5% 1608 R/TP R549 0RJ0332D677 33 OHM 1/10 W 5% 1608 R/TP R555 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R557 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R560 0RJ1501D677 1.5K OHM 1/10 W 5% 1608 R/TP-L1750S R560 0RJ4702D677 47000 OHM 1/10 W 5% 1608 R/T-L1950S R561 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R566 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP R701 0RJ0752D677 75 OHM 1/10 W 5% 1608 R/TP R703 0RJ0752D677 75 OHM 1/10 W 5% 1608 R/TP R706 0RJ0752D677 75 OHM 1/10 W 5% 1608 R/TP R708 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R709 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP R716 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R717 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R720 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R721 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R722 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R723 0RJ0682D677 68 OHM 1/10 W 5% 1608 R/TP R724 0RJ0682D677 68 OHM 1/10 W 5% 1608 R/TP R726 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP R727 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP R737 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R744 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R747 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R769 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R775 0RJ0682D677 68 OHM 1/10 W 5% 1608 R/TP R779 0RJ0682D677 68 OHM 1/10 W 5% 1608 R/TP R780 0RJ2001D677 2K OHM 1/10 W 5% 1608 R/TP R781 0RJ2001D677 2K OHM 1/10 W 5% 1608 R/TP R782 0RJ0471D677 4.7 OHM 1/10 W 5% 1608 R/TP R803 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R805 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP-L1750S R806 0RJ3900D677 390 OHM 1/10 W 5% 1608 R/TP-L1750S R807 0RJ3900D677 390 OHM 1/10 W 5% 1608 R/TP-L1750S R809 0RJ3900D677 390 OHM 1/10 W 5% 1608 R/TP-L1750S R810 0RJ3900D677 390 OHM 1/10 W 5% 1608 R/TP-L1750S R811 0RJ2202D677 22K OHM 1/10 W 5% 1608 R/TP-L1950S R812 0RJ5600D677 560 OHM 1/10 W 5% 1608 R/TP-L1950S R813 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R814 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R815 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R816 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R817 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R818 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R819 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R820 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP

R821 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R822 0RJ0472D677 47 OHM 1/10 W 5% 1608 R/TP R823 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R824 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP

OTHERs

X501 6212AA2004A HC-49U TXC 12.0MHZ +/- 30 PP

CONTROL BOARD

C1 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C2 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R LED1 0DLLT0208AA LITEON LTST-C155KGJSKT R/TP R1 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R2 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R3 0RJ2001D677 2K OHM 1/10 W 5% 1608 R/TP R4 0RJ2001D677 2K OHM 1/10 W 5% 1608 R/TP R5 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP SW1 6600TR1002A SKQGACE010 J-ALPS NON 12V 50 SW2 6600TR1002A SKQGACE010 J-ALPS NON 12V 50 SW3 6600TR1002A SKQGACE010 J-ALPS NON 12V 50 SW4 6600TR1002A SKQGACE010 J-ALPS NON 12V 50 SW5 6600TR1002A SKQGACE010 J-ALPS NON 12V 50 ZD1 0DZ560009GB "BZT52C5V6S-(F),LF DIODES R/T" ZD2 0DZ560009GB "BZT52C5V6S-(F),LF DIODES R/T"

- 22 -

Page 26

U201-#88

SCHEMATIC DIAGRAM

1. SCALER

# 1

L1750S/L1950S

ZAN3SL

- 23 -

Page 27

5 6

U501-#43, 44

2. MICOM

# 2

L1750S/L1950S

MICOM

- 24 -

5 6

1.5K(17")

Page 28

J707-#5,6/U801-#1/U803-#3

3. POWER

390

# 3

L1750S/L1950S

POWER

390

390 390

- 25 -

Page 29

Inverter On

Micom Port check

J705 Inverter output

J707-#2

4. CONNECTOR & JACKS

J707-#2

Inverter Off

Micom Port check

J705 Inverter output

J707-#5,6/U801-#1/U803-#3

# 4

L1750S/L1950S

CONNECTOR & JACKS

15K

- 26 -

Page 30

Dec. 2004

P/NO : 3828TSL096P Printed in Korea