Samsung CN15V TFT Schematic

TFT-LCD MONITOR

CN15V*

Manual

SERVICE

TFT-LCD MONITOR CONTENTS

EXIT MENUAUTO EXIT MENUAUTO

1. Precautions

2. Product Specifications

3. Disassembly & Reassembly

4. Troubleshooting

5. Exploded View & Parts List

6. Electrical Parts List

7. Block Diagram

8. Wiring Diagram

9. Schematic Diagrams

10. Panel Description

CN15VS

CN15VO

EXIT MENUAUTO EXIT MENUAUTO

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.

3. When the chassis is operating, semiconductor heatsinks are potential shock hazards.

1-1-2 Servicing the LCD Monitor

1. When servicing the LCD Monitor, remove the static charge by connecting a 10k ohm resistor in series with an insulated wire (such as a test probe) between the chassis and the anode lead. (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

4. With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the power-plug prongs in the AC outlet and repeat

the test.

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.

CN15V* 1-1

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

DEVICE UNDER TEST

TEST ALL

EXPOSED METAL

SURFACES

(READING SHOULD

NOT BE ABOVE 0.5mA)

LEAKAGE CURRENT

TESTER

2-WIRE CORD

ALSO TEST WITH

PLUG REVERSED (USING AC ADAPTER PLUG AS REQUIRED)

EARTH

GROUND

2 Product Specifications

2-1 Specifications

LCD Panel TFT-LCD panel, RGB vertical stripe, normaly white, 15-Inch viewable,

0.297 (H) x 0.297 (V) pixel pitch

Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Referring to Timing chart, Page 2-3, 2-4)

Vertical : 50 Hz ~ 75 Hz (Referring to Timing chart, Page 2-3, 2-4)

Display Colors 16,003,008 colors

Maximum Resolution Horizontal : 1024 Pixels Vertical : 768 Pixels

Input Video Signal Analog, 0.714 Vp-p ± 5% positive at 75 Ω, internally terminated

Input Sync Signal Type: Seperate H/V sync, Composite H/V, Sync-on-Green, automatic synchronization

without external switch of sync type

Level: TTL level

Maximum Pixel Clock rate 80 MHz

Active Display Horizontal/Vertical 304.1 mm / 228.1 mm

AC power voltage & Frequency AC 90 ~ 264 Volts, 60/50 Hz ~ 12V/3A

Power Consumption 25 W (normal)

Dimensions / Unit Weight / incl.Carton Unit (W x D x H) with: Standard base 385.4 x 364.7 x 173 mm / 5.20kg / 8.4kg MultiMedia base 385.4 x 406.2 x 179 mm / 5.95kg / 9.6kg Pivot MM base 385.4 x 406.2 x 179 mm / 5.95kg / 9.6kg Angle Pivot base 385.4 x 431.6 x 179.9 mm / 6.6kg / 9.8kg Wire-frame base 385.4 x 339.2 x 79.7 mm / 4.4kg / 7.6kg Carton (W x D x H) 500 x 260 x 457 mm

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

Humidity : 10 % ~ 80 % Storage Temperature : 13 °F ~ 113 °F (-25 °C ~ 45 °C) Humidity : 5 % ~ 95 %

Audio Characteristics • Built-in Microphone: High-sensitivity condenser microphone (mono)

• Audio input: Left/Right Stereo phone jack, 0.5 Vrms

• Sound output: 1.0 W (left) + 1.0 W (right)/THD 1% at 8ohm

• Frequency response: 80 Hz~20 kHz (at –3dB)

• Headphone: Max 50mW output (3.5-pi jack)

• Speaker: Internal semi Dome (16ohm x 2)

•CN15V* complies with SWEDAC (MPR II) recommendations for reduced electromagnetic fields.

•Designs and specifications are subject to change without prior notice.

CN15V* 2-1

Item Description

3-1-1 Removing the Stand

1. Remove 4 screws in the hinge area.

2. Pry it off the back of the monitor.

3. Disconnect Power Cord and Signal Cable.

3-1-2 Main Body Disassembly

1. Remove 4 screws on the four corner of the Rear Cover.

2. Remove Rear Cover from the Front Cover.

3. Remove 11 screws on the Shield and remove the shield.

4. Disconnect Inverter wire, Function PCB wire and Interface wire. Remove 4 screws on the Main PCB and remove 2 screws on the D sub shield.

5. Remove the Main PCB Assembly.

6. Remove 6 screws on the Inverter PCB Assembly and then remove it

7. Remove 6 screws on the Rear Panel Bracket.

8. Remove the Bracket Assembly from the Front Cover.

9. Remove 3 screws on the Function PCB from locking area of Function knob and remove Function PCB.

10. Remove 4 screws on the Shield of Panel.

11. Remove the Shield.

12. Remove Rear Bracket from Panel.

13. Remove 2 screws between Panel Rear and Inverter PCB.

14. Remove the Interface wire on the Rear Side of Panel.

3-1-3 Standard Stand Disassembly

1. Remove 5 screws from the Stand Rear

2. Remove 4 screws from the Stand Bottom.

3. Remove Stand Front from the Stand assembly.

4. Remove 2 screws from the Stand assembly.

5. Remove the Stand Rear from the Stand assembly.

6. Remove 5 screws on the Vesa Brkt from the Stand assembly.

7. Remove cover hinge from the Stand assembly.

8. Remove Stand Base from the Stand assembly.

3-1-4 Pivot Multi-media Stand Disassembly

(option)

1. Stand the stand assembly with the base close to you.

2. Remove 4 screws on the back cover of the stand and remove it.

3. Stand the stand assembly upside down.

4. Remove 4 screws.

5. Disconnect CN805, CN806, CN807, CN808, CN809, CN812 and F1.

6. Remove the Back Cover of the Stand Front assembly.

7. Remove 4 screws on the external adaptor and remove the adaptor.

8. Remove 2 screws between hinge and Stand Body.

9. Remove the hinge.

10. Remove 2 screws on Audio main PCB and remove it.

11. Remove 2 screws on the Audio Function PCB and remove it.

3-1-5 Angle Pivot Stand Disassembly (option)

1. Remove the cap pivot from the stand assembly.

2. Remove 4 screws on the hinge assembly.

3. Remove 4 screws on the Stand Rear.

CN15V* 3-1

3 Disassembly and Reassembly

This section of the service manual describes the disassembly and reassembly procedures for the CN15V* monitor.

WARNING: This monitor contains electrostatically sensitive devices. Use with caution when

handling these components.

3-1 Disassembly

Cautions:1. Disconnect the monitor from the power source before disassembly.

2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.

CN15V* 4-1

4 Troubleshooting

Notes: 1. Before troubleshooting, setup the PC’s display as below.

• Resolution: 1024 x 768

• H-frequency: 48 kHz

• V-frequency: 60 Hz

2. If no picture appears, make sure the power cord is correctly connected.

3. Check the following circuits.

• No raster appears: Audio PCB, SMPS PCB, Main PCB

• 12V develop but no screen: Main PCB

• 12V does not develop: Audio PCB, SMPS PCB

4. If you push and hold the “EXIT” button for more than 5 seconds, the monitor automatically turns back to the factory preset.

4-1 No Power

Does proper DC 12 V appear at

DC jack connected to CN101?

Check SMPS or CN809.

Yes

Does proper DC 3.3 V appear at

Pin 4 of IC104?

Check IC104.

Check IC101 and IC103.

Yes

CN15V* 5-1

5 Exploded View and Parts List

5-1 Simple Base

CN15V*

Loc. No. Code No. Description Specification Remarks

6-1

CIS 3704-001071 SOCKET-IC 42P,DIP,SN,1.778mm CIS BN70-00018A SHIELD-D/SUB RN15AS,SPTE,0.5,-,- SNA CIS BN46-00007M MICOM-S/W,NILL(L01) NILL(L01),-,-,-,-,-,- SNA CN101 3722-000117 JACK-DC POWER 3P,3.5mm,AG,BLK,NO SNA CN102 3701-001160 CONNECTOR-DSUB 15P,3R,FEMALE,ANGLE,AU15U IC301 0903-001194 IC-MICROCONTROLLER 3P863,8Bit,SDIP,42P,600MIL,12MHz,ST,CMOS,PLASTIC,5V,-,-40to+85C,1040BYTE,48KBYTE SNA BD181 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD182 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD183 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD201 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD205 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD206 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD301 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD302 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD303 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm BD304 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm C101 2402-000170 C-AL,SMD 1uF,20%,50V,GP,TP,4.3x4.3x5.4, C102 2402-000168 C-AL,SMD 100uF,20%,16V,GP,TP,8.3x8.3x6.3mm C103 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C104 2402-000168 C-AL,SMD 100uF,20%,16V,GP,TP,8.3x8.3x6.3mm C105 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C106 2402-000170 C-AL,SMD 1uF,20%,50V,GP,TP,4.3x4.3x5.4, C109 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C110 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C111 2402-000168 C-AL,SMD 100uF,20%,16V,GP,TP,8.3x8.3x6.3mm C112 2409-001029 C-ORGANIC 120uF,20%,6.3V,WT,TP,10.3x10.3x10.3mm,9 C131 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C132 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C133 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C134 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C135 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C136 2203-000257 C-CERAMIC,CHIP 10nF,10%,50V,X7R,TP,1608 C137 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C138 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C139 2402-000108 C-AL,SMD 10uF,20%,16V,WT,TP,4.3x4.3x5.4 C140 2402-000108 C-AL,SMD 10uF,20%,16V,WT,TP,4.3x4.3x5.4 C141 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C142 2402-000108 C-AL,SMD 10uF,20%,16V,WT,TP,4.3x4.3x5.4 C143 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C144 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C145 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C146 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C147 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C148 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C149 2402-000108 C-AL,SMD 10uF,20%,16V,WT,TP,4.3x4.3x5.4 C150 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C151 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C152 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C153 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C154 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C155 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C156 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C157 2402-000108 C-AL,SMD 10uF,20%,16V,WT,TP,4.3x4.3x5.4 C159 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C160 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C161 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C162 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C163 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C164 2203-005005 C-CERAMIC,CHIP 100nF,10%,16V,X7R,TP,1608 C165 2402-000108 C-AL,SMD 10uF,20%,16V,WT,TP,4.3x4.3x5.4 C166 2203-000280 C-CERAMIC,CHIP 0.01nF,0.5pF,50V,NP0,TP,1608

6 Electrical Parts List

6-1 Main PCB Parts

CN15V* 7-1

7 Block Diagram

CN15V* 8-1

8 Wiring Diagram

20~19 18~17 16~15 14 13~12 11 10~9 8 7~6 5 4~3 2 1

CN15V* 9-1

9 Schematic Diagrams

9-1 Power Scaler Part Schematic diagram

+3.3V_S

PC_HSYNC_IN

PC_VSYNC_IN

HDATA1 HDATA2 HCLK HDATA3

RESETn HDATA0 HFS

PC_RED_IN

PC_GREEN_IN

PC_BLUE_IN

IC105 #44

CH1 RMS= 1.780V

IC105 #150

CH1 RMS= 3.428V

IC105 #43

CH1 RMS= 4.060V

IC105 #

46,47,55,56,63,64

CH1 RMS= 2.2V

9 Schematic Diagrams

9-2

CN15V*

9-2 LVDS Part Schematic diagram

CN201 #3, 16

CH1 RMS= 1.214V

+ 23 hidden pages