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Samsung PDP4298EDX/SMS Service Manual

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SERVICE
PLASMA DISPLAY TV
PLASMA DISPLAY TV
Chassis : D54B(N)
Model
: PDP4298EDX/SMS (PDP4298ED)
Manual
1.
2.
3.
Exploded View and Parts List
4.
5.
6.
7.
CONTENTS

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Summary of Contents for Samsung PDP4298EDX/SMS

  • Page 1: Table Of Contents

    PLASMA DISPLAY TV Chassis : D54B(N) Model : PDP4298EDX/SMS (PDP4298ED) SERVICE Manual PLASMA DISPLAY TV CONTENTS Specifications Alignment and Adjustments Exploded View and Parts List Service Item Circuit Description Troubleshooting Schematic Diagrams...
  • Page 2 ELECTRONICS © Samsung Electronics Co., Ltd. DEC. 2004 This Service Manual is a property of Samsung Electronics Co.,Ltd. Printed in Korea Any unauthorized use of Manual can be punished under applicable AA82-02224A International and/or domestic law.

  • Page 3: Specifications

    VIDEO input COMPONENT 2 - 480i / 480p / 720p / 1080i RGB : D-SUB 15P VIDEO / S-VIDEO COMPONENT 1 AUDIO input COMPONENT 2 PC (RGB) 10W + 10W (8 Ω) AUDIO output Subwoofer (500mv RMS at 1KHz) Samsung Electronics...
  • Page 4 MEMO Samsung Electronics...

  • Page 5: Alignment And Adjustments

    TEST PATTERN 12.OPTION TM_ALS42N02_001 13. RESET 02-12-10 09H 2-1-2(B) B SERVICE MODE utton Operations in Menu Displays all menus Joystick UP/DOWN Cursor move to select items Joystick (LEFT/RIGHT) Enable to increase and decrease the data of the selected items Samsung Electronics...
  • Page 6 ITEM Component1,2(HD) TV/VIdeo/S-Video/Component1,2(SD) VAPGAIN VAPINV YPFP YPFG 2-1-3(B) VPC3230 : TV-COMP ITEM Component1,2(HD) TV/VIdeo/S-Video/Component1,2(SD) CONTRAST BRIGHTNESS PEAKING CORING LUMA DELAY HPLL SPEED YUV CONTRAST YUV BRIGHTNESS YUV SATCB YUV SATCR YUV TINT SATURATION 2000 2000 2000 2000 TINT Samsung Electronics...
  • Page 7 2-1-3(C) VPC3230(S) TV COMP ITEM Component1,2(HD) TV/VIdeo/S-Video/Component1,2(SD) PIP CONTRAST PIP BRIGHTNESS YUV CONTRAST YUV BRIGHTNESS LUMA DELAY H POSITION V POSITION 2-1-3(D) FLI2200 : TV-COMP ITEM TV/VIdeo/S-Video/Component1,2(SD) Component1,2(HD) Y CLAMP C CLAMP Y DELAY C DELAY MOTION DETECT Samsung Electronics...
  • Page 8 TEXT ALPHA TEXT THRESHOLD FILTER ML FILTER MR FILTER FR FILTER MC FILTER UC FILTER LC FILTER YPASS R GAMMA G GAMMA B GAMMA H POSITION V POSITION H SIZE V SIZE OVERSCAN B OVERSCAN G OVERSCAN R Samsung Electronics...
  • Page 9 2-1-3(G) DNIe : ALL (EXCEPT SUB BRIGHT/CONT) ITEM Component1,2(HD) TV/VIdeo/S-Video/Component1,2(SD) SUB BRIGHT SUB CONT NR SCALE MAX NR SCALE MIN DE GAIN COR DE GAIN CLIP CE UPPER CE CUTOFF CE GAIN WTE Y THRE WTE C THRE SYNC MODE PATT SEL Samsung Electronics...
  • Page 10 YG GAIN 2-1-3(I) AD9883 : COMP-PC ITEM Component1,2(HD) TV/VIdeo/S-Video/Component1,2(SD) R GAIN G GAIN B GAIN R, CR OFFSET G, Y OFFSET B, CB OFFSET AUTO COLOR AUTO COLOR : Automatic white balance adjustment in pc mode and component(HD) mode. Samsung Electronics...
  • Page 11 TV/VIdeo/S-Video/Component1,2(SD) R DRIVE G DRIVE B DRIVE R CUTOFF G CUTOFF B CUTOFF GAMMA GTS SET ERD MODE RANDOM NOISE DIFF FILTER APC SET APC VALUE ACTIVE VPOS ACTIVE HPOS VSYNC POS HSYNC POS VSYNC WIDTH HSYNC WIDTH Samsung Electronics...
  • Page 12 IRC AFN 0:General American mode 1:Military American mode LANGUAGE 0:English 1:French 2:Spanish CUSTOMER 0:CE 1:VMB 0:1 TUNER 1:2 TUNER TUNER Stereo ↔ mono boundary value PILOT HIGH Stereo ↔ mono boundary value PILOT LOW Customer settings reset RESET Samsung Electronics...
  • Page 13 Memory mode level level Memory mode Micom can memorize the four modes separately. However, under the current adjustment guidelines, DTV and PC are memorized with the same value during DVI adjustment and RF is memorized with a separate value. Samsung Electronics...
  • Page 14 2-2-2 White Balance Coordinates by Mode Pedestal Level Low Light High Light measure point measure point DTV COMPONENT VIDEO (480P, 720P, 1080i ) Y( fL) 32.0 33.0 17.6 33.0 Y( fL) = Pattern Used in Adjustment : 10 Steps Gray scale pattern 2-10 Samsung Electronics...
  • Page 15 VR : Vari able Resistor SMPS T(VS) CN804 T(VE) VSCA N VSET N805 T(VSCAN) T(VSET) T(VA) N806 T(VG) N812 Vstb CN803 T(STB_5V) CN800S CN802 CN801 OUTPUT Voltage( V) VSCAN(VSC) See the labels attached on the base chassis. VSET STB_5V +15V Samsung Electronics 2-11...
  • Page 16 MEMO 2-12 Samsung Electronics...
  • Page 17 Exploded View & Parts List 3. Exploded View & Parts List 3-1 PDP4298EDX/SMS Yon can search for the updated part code through ITSELF web site. URL:http://itself.sec.samsung.co.kr Loc.No. Code No. Description;Specification Q'ty S.N.A M0165 BN94-00494E ASSY PCB MISC-2 TUNER DIGITAL;PDP4294X/S T0001 BN96-00314A ASSY COVER P-BACK;42P3H,AL 5052,T1.2...

  • Page 18: Service Item

    ⑧ ASSY PDP P-PBA,Y BUFF(DOWN) BN96-00259A LJ92-00638A,SPD-42P3,D54A,42",ALEXANDER ,SD,SDI CODE ⑨ ASSY PDP P-SMPS BN96-00249A 42P3S/50P3H,42SD/50HD,445*245,42MM_MAX,90V~264V,NTSC/PAL,SEMCO ⑩ ASSY PCB MISC-2 TUNER DIGITAL BN94-00494E PDP4294X/SMS,D54B,SAMS CLUB ⑪ ASSY PCB MISC-2 TUNER ANALOG BN94-00421A SPD-50P3H,D57A ⑫ ASSY PCB MISC-CONTROL BN94-00494B SPN4235,D54B,ALEX SCREEN-EMI,FILTER BN64-00122A FILTER,42P3,984*584,T3.0,0.1ohm,T47% Samsung Electronics...
  • Page 19 Electrical Parts List 4-2 PDP4298EDX/SMS Yon can search for the updated part code through ITSELF web site. URL:http://itself.sec.samsung.co.kr Loc.No. Code No. Description;Specification Q'ty CIS3 BN40-00007A TUNER;TCPN9081PC27D,TCPN9081PC27D,45.75M CIS3 BN40-00017A TUNER;TCLN9081PC27S(S),NTSC,181CH,45.75M M0165 BN94-00494E ASSY PCB MISC-2 TUNER DIGITAL;PDP4294X/S M0166 BN94-00421A ASSY PCB MISC-2 TUNER ANALOG;SPD-50P3H,D...

  • Page 20: Circuit Description

    Circuit Operation Description 5. Circuit Description 5-1 BLOCK DIAGRAM Samsung Electronics...

  • Page 21: Samsung Electronics

    Circuit Operation Description 5-2 WIRE DIAGRAM Samsung Electronics...

  • Page 22: Power Supply

    Circuit Operation Description 5-3 POWER SUPPLY 5-3-1 Block Diagram Samsung Electronics...
  • Page 23 Driving Voltage of Fet D12V +12V 0.1A A12V +12V 0.3A 0.1A IC Driving Voltage of Logic Board 0.1A 1.0A D3.3V +3.3V 4.5A 12V AMP +12V 1.7A Amp Voltage of Audio Board +33V 0.003A STD_5V 0.6A Stand-by for Remote Control Samsung Electronics...
  • Page 24 Even if a short_circuit occurs when the SMPS is operating within the range presented in Chapter 3, it will not cause a malfunction to the parts or the PCB patterns. The following table gives Over Current protection specifications. Table3. Over Current Protection. Parameter Unit VS(85V) VA(75V) D3.3V Samsung Electronics...
  • Page 25 The AC/DC Converter converts AC input into DC voltage using a power-factor enhancement circuit. It is designed to not only enhance the power-factor but also suppress noise. It also becomes the input for other constant voltage parts. Picture 1. PFC Drive FET(2SK2372) Drain pulse Samsung Electronics...
  • Page 26 = RAMP x 0.51 RAMP In the SMPS circuit, the oscillation frequency is as follows: = 59.417kHz osc = 0 51 ( R59 : 1/8W 20K ) , C ( C14 : MLCC 222 ) Samsung Electronics...
  • Page 27 As the main part of a SMPS for PDP, sustain voltage must supply a high power, 85V/5.0A. To comply with the specification, the Asymmetrical Half Bridge converter method was used. At the output stage two 85V converters are connected parallel for high efficiency and reduction of sys- tem size against a single 85V converter. Samsung Electronics...
  • Page 28 Circuit Operation Description Picture 4. VS Drive FET(SPW17N80C3) Drain pulse Picture 5. VS Drive FET(SPW17N80C3) Gate pulse Samsung Electronics...
  • Page 29 In Current Mode Operations, a PWM wave is induced via a current detection resistor or current transformer and indicates the current that flows through the output terminal. $ DC-DC Converter Input to VSCAN, VSET and VE are included in the VS component. Picture 6. VSET Pulse Picture 7. VE Pulse 5-10 Samsung Electronics...
  • Page 30 Circuit Operation Description Picture 8. VSCAN Pulse % Output (VA,Multi Outputs) Pulse Picture 9. VA Main Pulse Samsung Electronics 5-11...
  • Page 31 Circuit Operation Description Picture 10. Multi Outputs Main Pulse 5-12 Samsung Electronics...
  • Page 32 RT N RT N + 60V VSET RT N RT N + 85V RT N + 85V + 85V + 85V CN807,808,809,810,811 ( FAN ) CN800(AC INPUT ) OUT PUT INPUT + 12V D12V RT N FAN_D Samsung Electronics 5-13...
  • Page 33 Circuit Operation Description 5-3-4 Power Supply Systematic Diagram and Wiring Diagram 5-14 Samsung Electronics...
  • Page 34 Circuit Operation Description 5-3-5 Power Supply Layout Samsung Electronics 5-15...
  • Page 35 Nor mal Abnor mal VSCAN Che ck the IC16 ,IC1 7 ,IC1 8 VE,VSET Nor mal Che ck the Othe r boar d ( Image Boar d or Dr ive r Boar d ) or Cable . 5-16 Samsung Electronics...
  • Page 36 D205 MBR20100CT 100V,20A A6V,D6V Output Diode D301 MBR20100CT 100V,20A D3.3V Output Diode D201 BYV38 1kV,2A TELEFUNKEN VT Output Diode D202 D10LC20U 200V,10A VG Output diode RL2S G2R-1A DC5V DC5V OMRON RELAY RL3S G2R-1A DC24V DC24V OMRON RELAY Samsung Electronics 5-17...
  • Page 37 (i.e., the same state of wall and space electric discharges). The ramp reset discharge section, therefore, is important to secure the drive margin, and methods most widely used to date include wall voltage controlling by ramp pulse. 5-18 Samsung Electronics...
  • Page 38 And, weak discharge is generated because of a small impressed voltage. Samsung Electronics 5-19...
  • Page 39 FET Gate Driver Recovery Vset Vscan Main Switching Switching Switching Switching Recovery circuit Picture. Drive Y-Board LOGIC Signal Input Power Input 110V LOGIC Signal Buffer FET Gate Driver Main Reovery Switching Switching Switching Recovery circuit Picture. Drive X-Board 5-20 Samsung Electronics...
  • Page 40 : 70V ~80V - Scan bias e) Vdd : 3.3V - Logic signal buffer IC f) Vcc : 15V - FET Gate drive IC 2. Logic Signal - Supplied from the logic board - Gate signal of each FET Samsung Electronics 5-21...
  • Page 41 Circuit Operation Description 5-4-1(E) Drive Circuit’s Operational Block Diagra m - Functions of Boards 5-22 Samsung Electronics...
  • Page 42 Utilizes the Va pulses on the address electrodes to form an address discharge by using the differences between the beamed pulses occurring on the Y electrodes. It is manufactured in the COF form. Each COF consists of data drive ICs (STMicroelectronics’s STV7610A: 96 outputs). When a single scan occurs, 7 COFs are required. Samsung Electronics 5-23...
  • Page 43 Circuit Operation Description 5-4-2 SPECIFICATION OF DRIVE PULSES 5-4-2(A) DRIVE PULSES 5-24 Samsung Electronics...
  • Page 44 5~6 discharges, though it may differ depending on the structure of the electrodes and the environmental conditions. Hence, the reason to maintain the first sustain-pulses for a long time is to form a stabilized first discharge and generate as many wall charges as it possibly can. Samsung Electronics 5-25...
  • Page 45 G2, FET2 gets short-circuited, thereby causing GND to be outputted to output terminals. (2) With signal impressed on G1, FET1 gets short- circuited, and with no signal impressed on G2, FET2 gets open-circuited, thereby causing 180V to be outputted to output terminals. 5-26 Samsung Electronics...
  • Page 46 Circuit Operation Description 5-4-2 (D) DRIVER CIRCUIT DIAGRAM Samsung Electronics 5-27...
  • Page 47 Circuit Operation Description 5-4-2(E) DRIVER BOARD CONNECTOR LAYOUT Power Panel Panel Signal Panel 5-28 Samsung Electronics...
  • Page 48 Circuit Operation Description Panel Power Panel Panel Panel Panel Signal Panel Samsung Electronics 5-29...
  • Page 49 - Then check the line between OUTL and OUTH using a diode (diode ccheck) and ensure that the forward voltage falling is between 0.4V~0.5V. - Also, the resistance between the two terminals should be more than several k ohms. 5-30 Samsung Electronics...
  • Page 50 - Connect the Y Main to the Y buffer and apply power. Ensure that at least one of the OUT1~8 values of the Y buffer is the same as one of the values shown on Attachment 1. OUT1 OUT2 Samsung Electronics 5-31...
  • Page 51 Circuit Operation Description - Ensure that the TPOUT outputs on the X board match those in Attachment 2 when the power is applied. 5-32 Samsung Electronics...
  • Page 52 Circuit Operation Description Attachment # 1 Y Output Waveform Ensure that one scan pulse is output! Y Output Waveform (200us/div, 100V/div) Samsung Electronics 5-33...
  • Page 53 Circuit Operation Description Attachment # 2 X Output Waveform X Output Waveform (100us/div, 100V/div) 5-34 Samsung Electronics...
  • Page 54 Circuit Operation Description 5-5 Logic part 5-5-1 Description of the Logic Board 5-5-1(A) 42” SD S2.0 Board Layout Samsung Electronics 5-35...
  • Page 55 Circuit Operation Description 5-5-1 (B) Chart of Logic Board Signal Flow 5-36 Samsung Electronics...
  • Page 56 Outputs the address data and control signals to the G-buffer board. (G-Address Buffer Connector) Power Connector Receives the power input (5V) for the logic board. Power Fuse Fuse attached to the power input part (5V) of the logic board. Samsung Electronics 5-37...
  • Page 57 If the set has a problem, visually check the LED status and replace the board if any error is found. If you need to detect and check errors, follow the directions given in the Attachment: “Logic Board Inspection Procedure”. 5-38 Samsung Electronics...
  • Page 58 LED indicators. Replace the 256K EEPROM Check the video board. and check again. Check the internal patterns. Screen error of a specific COF block. Check the detailed waveforms Check the buffer board. (Refer to the Inspection Procedure attached.) Samsung Electronics 5-39...
  • Page 59 4-3 Visually inspect the soldering state of the ASS’Y Y. First, inspect the omitted part slots on the mounting surface and the short-circuits on the various ICS and connector pins, and then inspect the short-circuits on th opposite side. When the visual inspection is finished, record the inspection results on the Inspection Record Sheet. 5-40 Samsung Electronics...
  • Page 60 Connect PROBE 1 as shown in the following figure and set it to TRIGGER. Perform the test by capturing the waveforms from each point with PROBE 2. GND1 TP13 Figure 2. Connecting probe 1 of the oscilloscope Samsung Electronics 5-41...
  • Page 61 $ Measure each waveform on the board and compare to the waveforms on Attachment 1. % Finish the inspection and turn the linear power supply (or SMPS) off. ^ After completing the inspection, set the SW2001 switch to the external pattern. 5-42 Samsung Electronics...
  • Page 62 5-5-4 SD S2.0 Logic Board Waveforms ❈ Oscilloscope settings: 4.0ms/div, 2V/div signal for trigger (TP13) peak to peak level:3.3V TP04,VSYNC peak to peak level:3.3V Frequency:60Hz signal for trigger (TP13) peak to peak level:3.3V TP05,HSYNC peak to peak level:3.3V Samsung Electronics 5-43...
  • Page 63 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN101(6),DATAEN peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V AR2042~AR2047 Terminal DATA peak to peak level:3.3V 5-44 Samsung Electronics...
  • Page 64 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN101(6),Xf peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN101(8),Xr peak to peak level:3.3V Samsung Electronics 5-45...
  • Page 65 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN101(10),Xc peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN101(12),Xp peak to peak level:3.3V 5-46 Samsung Electronics...
  • Page 66 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN101(14),Xg peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN101(16),Xe peak to peak level:3.3V Samsung Electronics 5-47...
  • Page 67 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN121(8),Xs peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(4),Yfr peak to peak level:3.3V 5-48 Samsung Electronics...
  • Page 68 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(6),Yg peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(8),Y1 peak to peak level:3.3V Samsung Electronics 5-49...
  • Page 69 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(10),Yrr peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(12),Ys peak to peak level:3.3V 5-50 Samsung Electronics...
  • Page 70 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(14),Yp peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(6),Ysp peak to peak level:3.3V Samsung Electronics 5-51...
  • Page 71 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(18),Ysc peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(20),Yc peak to peak level:3.3V 5-52 Samsung Electronics...
  • Page 72 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(22),Yr peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(24),Yf peak to peak level:3.3V Samsung Electronics 5-53...
  • Page 73 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(26),Ysc_c peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(30),TSC peak to peak level:3.3V 5-54 Samsung Electronics...
  • Page 74 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(32),STB peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(34),LE peak to peak level:3.3V Samsung Electronics 5-55...
  • Page 75 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(36),CLK peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V CN201(38),SIA peak to peak level:3.3V 5-56 Samsung Electronics...
  • Page 76 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V CN201(40),SIB peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V AR2009(1,2,3),POL peak to peak level:3.3V Samsung Electronics 5-57...
  • Page 77 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V AR2009(4), AR2008(1,2),STB peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V AR2010(2,3,4), peak to peak level:3.3V 5-58 Samsung Electronics...
  • Page 78 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V AR2008(3,4), AR2007(1), SCLK_1 peak to peak level:3.3V Frequency:20MHz signal for trigger (TP13) peak to peak level:3.3V AR2007(2,3,4), SCLK_2 peak to peak level:3.3V Frequency:20MHz Samsung Electronics 5-59...
  • Page 79 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V U2013(2),DATA peak to peak level:3.3V signal for trigger (TP13) peak to peak level:3.3V U2014(2),DATA peak to peak level:3.3V 5-60 Samsung Electronics...
  • Page 80 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V AR2011~AR2034 [Do not inspect the waveforms for AR2012(1), AR2015(1), AR2016(4), AR2017(4), AR2025(1), AR2026(4), AR2031(1), AR2030(4), AR2032(3), AR2033(2), and AR2034(3)] peak to peak level:3.3V Samsung Electronics 5-61...
  • Page 81 The output voltage of PROBE 2 should be 5V for inspection. signal for trigger (TP13) peak to peak level:3.3V EC1,EC2,EC3,FC4, GC5,GC6,GC7(16, 30,54,68),POL peak to peak level:5V signal for trigger (TP13) peak to peak level:3.3V EC1,EC2,EC3,FC4, GC5,GC6,GC7(9~ 14,23~28,47~52, 61~67),DATA peak to peak level:5V 5-62 Samsung Electronics...
  • Page 82 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V EC1,EC2,EC3,FC4, GC5,GC6,GC7(20, 34,58,72),STB peak to peak level:5V signal for trigger (TP13) peak to peak level:3.3V EC1,EC2,EC3,FC4, GC5,GC6,GC7(15, 29,53,67),BLK peak to peak level:5V Samsung Electronics 5-63...
  • Page 83 Circuit Operation Description signal for trigger (TP13) peak to peak level:3.3V EC,EC2,EC3,FC4, GC5,GC6,GC7(19, 57),SCLK_1 peak to peak level:5V Frequency:20MHz signal for trigger (TP13) peak to peak level:3.3V EC1,EC2,EC3,FC4, GC5,GC6,GC7(33, 72),SCLK_2 peak to peak level:5V Frequency:20MHz 5-64 Samsung Electronics...
  • Page 84 Circuit Operation Description 5-6 Video Circuit Part 5-6-1 Block Diagram 5-6-1(A) Analog Board IC & Signal Block Diagram Samsung Electronics 5-65...
  • Page 85 Circuit Operation Description 5-6-1(B) Digital Board IC & Signal Block Diagram 5-66 Samsung Electronics...
  • Page 86 (3) Check whether the video input signals (pins 43, 48, 54) and the H (pin 30) and V (pin 31) input signals are normal. (4) Check whether the data outputs are normal. Y, Pb, Pr (pins 25, 26, 27), COMP_H (pin 22) : 45 KHz (for 720p), COMP_V (pin 23) : 60Hz Samsung Electronics 5-67...
  • Page 87 (1) Check whether the proper power is supplied. (3.3V) (2) Check wether the power down pin’s (pin 32) output is High. (3) Check whether the outputs of DNIe are input into DS90C385 normally. (4) Check whether the LVDS data outputs are normal. 5-68 Samsung Electronics...

  • Page 88: Troubleshooting

    Normal Normal Replace the SMPS. Abnormal Check the Logic Replace the Logic board. outputs. Normal Abnormal Check the X-board Replace the X-board. outputs. Normal Abnormal Check the Y-board Replace the Y-board. outputs. Normal Replace the Panel. Samsung Electronics...
  • Page 89 Replace the upper Y buffer board. No lower screen Replace the lower Y buffer board. Replace the corresponding No 1/7 vertical screen X buffer board. Replace the panel. No 1/2 vertical screen No 3/4 vertical screen Replace the panel. Samsung Electronics...

  • Page 90: Schematic Diagrams

    Schematic Diagrams 7. Schematic Diagrams 7-1 ANALOG-1 TP01 TP02 TP03 TP01 TP02 TP03 TP04 TP05 TP06 TP07 TP08 TP04 TP05 TP06 TP08 TP07 Samsung Electronics...
  • Page 91 Schematic Diagrams 7-2 ANALOG-2 Samsung Electronics...
  • Page 92 Schematic Diagrams 7-3 ANALOG-3 Samsung Electronics...
  • Page 93 Schematic Diagrams 7-4 ANALOG-4 Samsung Electronics...
  • Page 94 Schematic Diagrams 7-5 DIGITAL-1 TP09 TP10 TP10 TP09 TP11 TP11 TP15 TP12 TP13 TP12 TP14 TP13 TP14 TP15 Samsung Electronics...
  • Page 95 Schematic Diagrams 7-6 DIGITAL-2 Samsung Electronics...
  • Page 96 Schematic Diagrams 7-7 DIGITAL-3 Samsung Electronics...
  • Page 97 Schematic Diagrams 7-8 DIGITAL-4 Samsung Electronics...
  • Page 98 Schematic Diagrams 7-9 DIGITAL-5 TP16 TP17 TP18 TP16 TP18 TP17 Samsung Electronics...
  • Page 99 Schematic Diagrams 7-10 DIGITAL-6 TP19 TP20 TP21 I C 6 0 1 D N I e TP22 TP19 TP20 TP21 TP22 7-10 Samsung Electronics...
  • Page 100 Schematic Diagrams 7-11 DIGITAL-7 TP23 TP24 TP25 TP23 TP26 TP26 TP28 TP29 TP27 TP27 TP24 TP25 TP30 TP28 TP29 TP30 Samsung Electronics 7-11...
  • Page 101 Schematic Diagrams 7-12 DIGITAL-8 7-12 Samsung Electronics...
  • Page 102 Schematic Diagrams 7-13 CONTROL Samsung Electronics 7-13...

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Pdp4298ed