Samsung GSM40MLA, GSM32MLA, GSM26MLA, LN40T71B, LN32T71B Service Manual

...

TFT-LCD-TV

Chassis GSM26MLA

GSM32MLA GSM40MLA

Model LN26T71B

LN32T71B LN40T71B

Manual

SERVICE

TFT-LCD TV Feature

- Luxurious Slim Design

- Supreme Picture Quality

- Supreme Sound Quality

- Supreme Convenience Quality

- Convenience for Users

photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of Samsung Electronics Co., Ltd.

LN26T71B / LN32T71B / LN40T71B Service Manual First edition June 2006. Printed in Korea.

Trademarks

Samsung is the registered trademark of Samsung Electronics Co., Ltd. LN26T71B / LN32T71B / LN40T71B and Macmaster Cable Adapter are trademarks of Samsung Electronics Co., Ltd.

Macintosh and Power Macintosh are trademarks of Apple Computer, Inc.

All other trademarks are the property of their respective owners.

Contents

1 Precautions

1-1

1-1-1 Warnings

1. For continued safety, do not attempt to modify the circuit board.

2. Disconnect the AC power and DC Power Jack before servicing.

1-1-2 Ser vicing the LCD Monitor

1. When servicing the LCD Monitor Disconnect the AC line cord from the AC outlet.

2. It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of this meter periodically.

1-1-3 Fire and Shock Hazard

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

1. Inspect each lead dress to make certain that the leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the monitor.

2. Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.

3. Leakage Current Hot Check (Figure 1-1):

WARNING: Do not use an isolation

transformer during this test.

Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410,

59.7).

Figure 1-1. Leakage Current Test Circuit

1-1-4 Product Safety Notices

Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection. The protection they give may not be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by on schematics and parts lists. A substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire and/or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.

1 Precautions

Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock.

1-1 Safety Precautions

1 Precautions

1-2

1-2-1 General Ser vicing

Precautions

1. Always unplug the units AC power cord from the AC power source and disconnect the DC Power Jack before attempting to: (a) remove or reinstall any component or assembly, (b) disconnect PCB plugs or connectors, (c) connect a test component in parallel with an electrolytic capacitor.

2. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.

3. After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the area around the serviced part has not been damaged.

1. Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. To avoid a shock hazard, be sure to remove the wrist strap before applying power to the monitor.

2. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation of an electrostatic charge.

3. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDs.

4. Use only a grounded-tip soldering iron to solder or desolder ESDs.

5. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static can generate electrical charges sufficient to damage ESDs.

4. Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input terminals and earphone jacks).

5. Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter (500 V) to the blades of the AC plug.

The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.

6. Always connect a test instruments ground lead to the instrument chassis ground before connecting the positive lead; always remove the instruments ground lead last.

6. Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.

7. Immediately before removing the protective material from the leads of a replacement ESD, 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 body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting your foot from a carpeted floor can generate enough static electricity to damage an ESD.

1-3 Static Electricity Precautions

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

1-2 Ser vicing Precautions

WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety

Precautions section of this manual.

Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety

precautions, always follow the safety precautions.

1. For safety reasons, more than two people are required for carrying the product.

2. Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock.

3. Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature may cause fire.

4. Bend the external antenna cable when connecting it to the product. This is a measure to protect it from being exposed to moisture. Otherwise, it may cause a fire or electric shock.

5. Make sure to turn the power off and unplug the power cord from the outlet before repositioning the product. Also check the antenna cable or the external connectors if they are fully unplugged. Damage to the cord may cause fire or electric shock.

6. Keep the antenna far away from any high-voltage cables and install it firmly. Contact with the highvoltage cable or the antenna falling over may cause fire or electric shock.

7. When installing the product, leave enough space (10cm) between the product and the wall for ventilation purposes. A rise in temperature within the product may cause fire.

1 Precautions

1-3

1-4 Installation Precautions

Memo

1 Precautions

1-4

2 Product Specifications

2-1

2 Product specifications

2-1 Fashion Feature

Excellent Picture Quality

-DNIe technology provides life-like clear images.

Dynamic Contrast

-Automatically detects the input visual signal and adjusts to create optimum contrast.

Energy saving

-Adjusts the brightness of TV so as to reduce the power consumption.

SRS TruSurround XT

-SRS TruSurround XT provides a virtual Dolby surround system.

Convenience

-The TV utilizes the HDMI system to implement perfect digital sound and picture quality.

2-2 LN26T71B Specifications

° ° ° °

2 Product Specifications

2-2

Item

Description

2 Product Specifications

2-3

2-3 LN32T71B Specifications

LCD Panel

TFT-LCD panel, RGB vertical stripe, normaly white, 32-Inch viewable, 0.511 (H) x 0.511 (V) mm pixel pitchh

Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Automatic) / Vertical : 60 Hz ~ 75 Hz (Automatic) Display Colors 16,777,216 colours Maximum Resolution Horizontal : 1360 Pixels

Vertical : 768 Pixels

Input Video Signal Analog 0.7 Vp-p ± 5% positive at 75

, internally terminated

Input Sync Signal Type : Seperate H/V

Level : TTL level

Maximum Pixel Clock rate

80 MHz

Active Display Horizontal/Vertical 556.4 mm / 339.8 mm

AC power voltage & Frequency AC 110 ~ 240V, 60 / 50 Hz

Power Consumption 152 W Dimensions(W x D x H)

Set 800 x 252 x 602.5 mm(31.5 x 9.92 x 23.72 inches)After installation Stand

800 x 79.6 x 564 mm(31.5 x 3.13 x 22.20 inches) Without stand

Weight Set

(After installation Stand) 14.8 kg (32.62 lbs)

TV System Tunning Frequency Synthesize

System Sound MONO, STEREO

Environmental Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C) Considerations Operating Humidity : 10 % ~ 80 %

Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C) Storage Humidity : 5 % ~ 95 %

Antena Input 75

-MAX Internal speaker Out : Right : 10W / Left : 10W

-BASS Control Range : -8 dB ~ + 8dB

Sound Characteristic -TREBLE Control Range : -8 dB ~ +8 dB

-Headphone Out : 10 mW MAX

-Output Frequency : RF : 80 Hz ~ 15 kHz A/V : 80 Hz ~ 20 kHz

Item

Description

2 Product Specifications

2-4

2-4 LN40T71B Specifications

LCD Panel

TFT-LCD panel, RGB vertical stripe, normaly white, 40-Inch viewable, 0.648(H) x 0.216(V) mm pixel pitch

Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Automatic) / Vertical : 60 Hz ~ 75 Hz (Automatic) Display Colors 16,777,216 colours Maximum Resolution Horizontal : 1360 Pixels

Vertical : 768 Pixels

Input Video Signal Analog 0.7 Vp-p ± 5% positive at 75

, internally terminated

Input Sync Signal Type : Seperate H/V

Level : TTL level

Maximum Pixel Clock rate

80 MHz

Active Display Horizontal/Vertical 556.4 mm / 339.8 mm

AC power voltage & Frequency AC 110 ~ 240V, 60 / 50 Hz

Power Consumption 205 W Dimensions(W x D x H)

Set

1004 x 330 x 749 mm(39.52 x 12.99 x 29.49 inches) After installation Stand 31004 x 115 x 680 mm(39.52 x 4.52 x 26.77 inches) Without stand

Weight Set

(After installation Stand) 30.2 kg (66.58 lbs)

TV System Tunning Frequency Synthesize

System Sound MONO, STEREO

Environmental Considerations Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)

Operating Humidity : 10 % ~ 80 % Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C) Storage Humidity : 5 % ~ 95 %

Antena Input 75

-MAX Internal speaker Out : Right : 10W / Left : 10W

-BASS Control Range : -8 dB ~ + 8dB

Sound Characteristic -TREBLE Control Range : -8 dB ~ +8 dB

-Headphone Out : 10 mW MAX

-Output Frequency : RF : 80 Hz ~ 15 kHz A/V : 80 Hz ~ 20 kHz

Item

Description

2-5 Spec Comparison

2 Product Specifications

2-5

Design

Frequency

Horizontal Vertical Display Color

PC Resolution

Maximum mode

Input Signal

Sync Signal Video Signal

Power Consumption

Normal Power Saving

LA26R51B / LA32R51B / LA40R51BModel

30 ~ 61 kHz

60 ~ 75 Hz

16,777,216 colors

WXGA, 1360 x 768 @ 60 Hz WXGA, 1360 x 768 @ 60 Hz

H/V Separate, TTL, P. or N.

0.7 Vp-p @ 75ohm

140W / 184W / 285W

< 1W

LN26T71B / LN32T71B / LN40T71B

30 ~ 61 kHz

60 ~ 75 Hz

16,777,216 colors

H/V Separate, TTL, P. or N.

0.7 Vp-p @ 75ohm

100W / 165W / 205W

< 1W

2 Product Specifications

2-6

2-6 Option Specification

Item Item Name

Remote Control &

Batteries (AAA x 2)

Power Cord

Cover-Bottom

Stand

Stand Screw (4 ea)

Owner's Instructions

Warranty Card /

Registration

Card /Safety Guide Manual

(Not available in all locations)

BN59-00556A

3903-000067

26", 32" : BN63-02415B

40" : BN63-02416B

26" : BN90-00877A 32" : BN90-00876A 40" : BN90-00875A

6002-001294

BN68-01001W

Code.No Remark

3 Alignments and Adjustments

3-1

3 Alignments and Adjustments

3-1 Ser vice Instr uction

1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync.

2. Use the specified test equipment or its equivalent.

3. Correct impedance matching is essential.

4. Avoid overload. Excessive signal from a sweep generator might overload the front-end of the TV. When inserting signal markers, do not allow the marker generator to distort test result.

5. Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate.

6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts.

7. To protect aganist shock hazard, use an isolation transform.

3 Alignments and Adjustments

3-2

3-2 How to Access Service Mode

3-2-1 Entering Factory Mode

" "

- If you have Factory remote - control

- The buttons are active in the service mode.

1. Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left Arrow Right, Menu, Enter, Number Key(0~9)

2. Function - Control Key : Power, CH +, CH -, VOL +, VOL -, Menu, TV/VIDEO(Enter)

3-2-2 Panel Check

Specially for LA26,32R7**, You have to check Panel Maker Because of different adjustments as follows. First of all, Check the label rating!

1) Label Rating File

If Panel Mark is "A", Set the factory mode indicating as follows.

Panel BOM(Bill of material) : BN07-00289A Connector between Panel and Power Unit : BN39-00603A (250mm)

* Option Byte

1. Gamma "AUO"

2. Panel Option "AUO_AMVA"

If Panel Mark is "S" or not printed. Set the factory mode indicating as follows.

Panel BOM(Bill of material) : BN07-00247A Connector between Panel and Power Unit : BN39-00603M (300mm)

* Option Byte

1. Gamma "OFF"

2. Panel Option "AMLCD_INT"

Others are same shown below.

Panel check

3 Alignments and Adjustments

3-3

3-3 Factory Data

1. Calibration

2. Option Table XXXX XXXX

3. White Balance

4. SVP-PX

5. Option Block

6. STV8258/STA323W

7. YC Delay

8. Adjust

9. I2C Check

10. W/B MOVIE

11. Checksum

12. Reset

13. Spread Spectrum T-BRDMNUS-1000 (Main Micom Ver) T-BRDMNUSS-1000 (Sub Micom Ver)

Month / Day / Year / Hour / Min. / Sec.

1. Calibration

1) AV Calibration

2) DTV Calibration

3) PC Calibration

4) HDMI Calibration

2. Option Table XXXX XXXX inch Option 32 Carrier Mute ON Shop Mode OFF

Gamma AUO Auto FM ON Debug OFF

Panel option AUO_AMVA High Dev. OFF Dynamic Contrast OFF

2HDMI OFF ACR OFF V-Chip OFF

Brt,Sensor OFF Dynamic CE ON

EnergySave ON Dynamic Dimming ON

LBE/FBE OFF Color System Manual FRC(Micronas) OFF Auto Power ON FRC(Samsung) OFF Magazine LNA OFF

LNA OFF V-Chip Area US

3 Alignments and Adjustments

3-4

3. White Balance

Sub Brightness 104 104 104 R-Offset 122 122 122 G-Offset 128 128 128 B-Offset 129 129 129 Sub Contrast 165 155 --> 140 155 --> 140 R-Gain 137 137 137 G-Gain 128 128 128 B-Gain 136 136 136

1. Calibration

2. Option Table

AV Calibration EXE DTV Calibration EXE PC Calibration EXE HDMI Calibration EXE

Inch Option 26" 32" 40" Gamma AUO AUO AMLCD Panel Option AUO AUO_AMVA AMLCD_INT 2Hdmi OFF OFF OFF Brt. Sensor OFF OFF OFF EnergySave ON ON ON LBE/FBE OFF OFF OFF FRC(Micronas) OFF OFF OFF FRC(Samsung) OFF OFF OFF LNA OFF OFF OFF Carrier Mute ON ON ON Auto FM ON ON ON High Deviation OFF OFF OFF ACR OFF OFF OFF Dynamic CE ON ON ON Dynamic Dimming ON ON ON Color System Manual Manual Manual Auto Power ON ON ON Magazine LNA OFF OFF OFF V-Chip Area US US US Shop Mode OFF OFF OFF Debug OFF OFF OFF Dynamic Contrast OFF OFF OFF V-Chip OFF OFF OFF

3 Alignments and Adjustments

3-5

4. SVP-PX

ComB Filter Y-Filter 80H Sharpness H2Gain 00H

H4Gain 0CH V2Gain 00H V4Gain 0CH Sr2Gain 00H Sr4Gain 08H Sl2Gain 00H Sl4Gian 08H PeaKTh1 03H PeaKTh2 33H PeaKTh3 45H

NR Y_NR_OFF 80H

C_NR_OFF 80H Y_NR_ON 80H C_NR_ON 80H

RGB Calibration R-Offset 23H

G-Offset 23H B-Offset 23H

R-Gain 9BH G-Gain 9BH B-Gain 9BH

ADC Calibration TCD3 Contrast 6AH

TCD3 Brightness 26H TCD3 CR 80H TCD3 CB 80H TCD3 Delay 00H Analog Y Offset 40H Analog PB Offset 80H Analog PR Offset 80H Analog Y Gain D6H Analog PB Gain FEH Analog PR Gain FEH Black Level 00H Svp Brightness 00H

3 Alignments and Adjustments

3-6

low high delta

Calibration Target AV ADC 17H D5H 04H

COMP ADC 0FH EBH 02H PC ADC 17H D5H 04H ALL RGB 00H DDH 08H

Color Management Skin Direction Reddish

Skin Enhane 40H

5. Option block

EXE

6. STV8258/STA323W

Ch1 Volume 40H Ch2 Volume 40H Stereo Pilot H 23H Stereo Pilot L 10H Sap Pilot H 80H Sap Pilot L 60H SQTH 70H CETH 10H AV Delay 55H Comp delay 32H HDMI Delay 32H PC Delay 32H L1 Att/Rel Thres 7F

7. Y/C Delay

RF PAL-M 77H RF PAL-N 64H RF NTSC 63H AV PAL-M 76H AV PAL-N 76H AV NTSC 54H S-VIDEO PAL-M 77H S-VIDEO PAL-N 77H S-VIDEO NTSC BBH Component 88H PC 88H HDMI 88H

3 Alignments and Adjustments

3-7

8. Adjust

Video Mute Time 10 Vol Curve Large Melody Volume 4 Ana_Dimm_Max FEH

LNA PLUS RFDB-1 Level 2

RFDB-2 Level 5 RFDB-3 Level 9 RFDB-4 Level 24

Hotel Option Hotel Mode OFF

Power On Channel 1 Power On Volume 10 Max Volume 100 Local Key Lock OFF Power On Source RF

9. I2C Check

EXE

10. W/B MOVIE

WB Movie OFF Color Mode Movie W1 R Gain 157 W1 B Gain 76 W1 R Offset 119 W1 B Offset 138 W2 R Gain 142 W2 B Gain 48 W2 R Offset 129 W2 B Offset 143 Movie Contrast 80 Movie Brightness 65 Movie Color 35 Movie Sharpness 35 Movie Color Tone Warm2

3 Alignments and Adjustments

3-8

11. Checksum

18EA

12. Reset

EXE

13. Spread Spectrum

Spectrum ON Delta 3 Positive 8 Negative 2

3 Alignments and Adjustments

3-9

3-4 Ser vice Adjustment

3-4-1 White Balance - Calibration

If picture color is wrong, do calibration first.

Equipment : CA210, Patten : chess pattern Execute calibration in Factory Mode Source AV : PAL composite, Component : 1280*720/60Hz

PC : 1024*768/60Hz

3-4-2 White Balance - Adjustment

If picture color is wrong, check White Balance condition.

Equipment : CA210, Patten : Toshiba Adjust W/B in Factory Mode

Sub brightness and R/G/B Offset controls low light region Sub contrast and R/G/B Gain controls high light region Source AV : PAL composite, Component : 1280*720/60Hz

HDMI[DVI] : 1280*720/60Hz

W/B Patten

[ Test Pattern : MSPG-945 Series Pattern #92 ]

*Color temperature 1500K +/-500, -6 ~-20 MPCD

*Color coordinate H/L : 267/263 +/- 2 35.0 Ft +/- 2.0Ft L/L : 270/260 +/- 3 1.5 Ft +/- 0.2Ft

( chess patten )

3 Alignments and Adjustments

3-10

3-4-3 Conditions for Measurement

1. On the basis of toshiba ABL pattern : High Light level (57 IRE)

- INPUT SIGNAL GENERATOR : MSPG-925LTH * Mode NO 1 : 744X484@60 Hz

NO 2 : 744X484@60 Hz NO 6 : 1280X720@60 Hz NO 21 : 1024X768@60 Hz

* Pattern NO 36 : 16 Color Pattern

NO 16 : Toshiba ABL Pattern NO 92 : W/B Pattern

2. Optical measuring device : CA210 (FL) Please use the MSPG-925 LTH generator for model

LE26M51B/LE32M51B/LE40M51B/LE46M51B

3-4-4 Method of Adjustment

1. Adjust the white balance of AV, Component and DVI Modes.

(AV Component)

a) Set the input to the mode in which the adjustment will be made

(RF DTV PC DVI).

* Input signal - VIDEO Mode : Model #2 (744*484 Mode), Pattern #16

- DTV,DVI Mode : Model #6 (1280*720 Mode), Pattern #16

- HDMI Mode: Model #6(1280*720 Mode), Pattern #16

b) Enter factory color control, confirm the data.

c) Adjust the low light. (Refer to table 1, 2 in adjustment position by mode)

- Adjust sub - Brightness to set the 'Y' value.

- Adjust red offset ('x') and blue offset ('y') to the color coordinates.

* Do not adjust green offset data.

d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)

- Adjust red gain ('x') and blue gain ('y') to the color coordinates. * Do not adjust the green gain and sub-contrast (Y) data.

Picture 4-2 W/B Patten

3 Alignments and Adjustments

3-11

Picture 4-3 W/B Patten

3 Alignments and Adjustments

3-12

3-5 Software Upgrade

3-5-1 How to Update Flash ROM

1. Installthe Flash Downloader ConnectSet(Service Jack)and Jig Cable to execute Program Update.

2. Flash Downloader program update

-Before Turning on the set,Click "connect"which is under of OSD Screen!

-Turn on the Set.

4 Troubleshooting

4-1

4 Troubleshooting

4-1 First Checklist for Troubleshooting

1. Check the various cable connections first.

- Check to see if there is a burnt or damaged cable.

- Check to see if there is a disconnected cable connection or a connection is too loose.

- Check to see if the cables are connected according to the connection diagram.

2. Check the power input to the Main Board.

3. Check the voltage in and out between the SMPS Main Board, between the SMPS

INVERTER Board, and between the Main LVDS Boards.

4 Troubleshooting

4-2

4-2-1 No Power

4-2 Checkpoints by Error Mode

Does proper DC 12V

appear at CN800?

Change a Assy PCB Power.

Yes

Check a connection a power cable.

Does proper DC A3.3V,

A5V appear at

C854, C866?

Check a IC809, IC802.

Change a main PCB ass'y.

Yes

Does proper DC 5V, 3.3V,

1.8V appear at C811, C853, C833?

Check a IC803, IC805, IC813, IC307.

Change a main PCB ass'y

Yes

A power is supplied to set?

Check a other function.

(No picture part)

Replace a lcd panel.

LAMP off, power indicator

LED red color?

4 Troubleshooting

4-3

4-2-2 No Video (Analog PC)

Check a PC source and check

the connection of DSUB cable?

Input a analog PC signal and

connected cable(DPMS).

Yes

Does the signal appear at

#30, 22, 38(R, G, B) of IC500?

PC cable. Change a PC

cable. Change a main PCB ass'y.

Yes

Power Indicator is off.

Lamp on, no video.

Does the digital data appear

at the output of

LVDS (R563_OP~R572_OP)?

Check a IC500

Change a main PCB ass'y.

Yes

Check a LVDS cable?

Replace a lcd panel?

Please, Call to Samsung Co. LTD.

Yes

4 Troubleshooting

4-4

WAVEFORMS

R,G,B Output Signal of IC500

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