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Daewoo DPN-4274NHS Service Manual

42” plasma pdp tv chassis : sp-200n
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Service Manual
42" PLASMA PDP TV
CHASSIS : SP-200N
MODEL : DPN-4274NHS
Caution
: In this Manual, some parts can be changed for improving. their
performance without notice in the parts list. So, if you need the
latest parts information, please refer to PPL(Parts Price List)in
Service Information Center(http://svc.dwe.co.kr)
DAEWOO ELECTRONICS Corp.
http : //svc.dwe.co.kr
S/M NO. : TCP120BEF1
Jun. 2004

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Summary of Contents for Daewoo DPN-4274NHS

  • Page 1 S/M NO. : TCP120BEF1 Service Manual 42” PLASMA PDP TV CHASSIS : SP-200N MODEL : DPN-4274NHS Caution : In this Manual, some parts can be changed for improving. their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List)in Service Information Center(http://svc.dwe.co.kr)

  • Page 2: Table Of Contents

    Contents I. Parts with the exception of MODULE 1. Safety Precautions 2. Product Specification 2-1. SPECIFICATION 2-2. Available Input Signal 2-3. Remote Control Setup Code 3. BLOCK DIAGRAM 4. Description Of A/V and power 4-1. Block Diagram of main IC and TP 4-2.

  • Page 3: Parts With The Exception Of Module

    I. Parts with the exception of MODULE 1. Safety Precautions 1. Safety Precautions (1) When moving or laying down a PDP Set, at least two people must work together. Avoid any impact towards the PDP Set. (2) Do not leave a broken PDP Set on for a long time. To prevent any further damages, after checking the condition of the broken Set, make sure to turn the power (AC) off.

  • Page 4: Product Specification

    2. Product Specification 2-1. SPECIFICATION I T E M S P E C I F I C A T I O N REMARK 1. GENERAL 1-1. MODEL NO DPN-4274NHS 1-2. CHASSIS NO SP-200N 1-3. SCREEN SIZE 42”(16:9) 1-4. COUNTRY 1-5. RESOLUTION 853(H) X 480(V) 1-6.
  • Page 5 Product Specification I T E M S P E C I F I C A T I O N REMARK 3-11. AV OUTPUT CVBS 1 set, SOUND R/L 1 set 3-12. FUNCTION 1) SCALING DVI : H/V SIZE PC: H/V SIZE ,POSITION ,PHASE, FREQUENCY VIDEO/DVD(480i/576i):16:9, 4:3, EnlargeLB, EnlargeLBS, PANORAMA DTV/DVD(480P or higher resolution) : 16:9, 4:3...

  • Page 6: Available Input Signal

    Product Specification 2-2. Available Input Signal (1) PC & DVI Resolution H Freq. (KHz) V Freq. (Hz) Remark 640x400 37.861 85.080 VESA 640x480 31.469 59.940 37.861 72.809 VESA 37.500 75.000 VESA 43.269 85.061 VESA 720x400 31.469 70.087 37.927 85.039 VESA 800x600 35.156 56.250...

  • Page 7: Remote Control Setup Code

    CALIFORNIA AUDIO CANON 034 037 039 CAPEHART CRAIG 003 045 116 CURTIS MATHES 037 039 DAEWOO 004 012 014 017 068 069 094 096 097 098 102 103 104 DAYTRON 018 029 044 048 DENON 202 219 222 DISH DYNATECH...
  • Page 8 Product Specification Maker (Brand) Name Code Number (3 digit) List MAGNAVOX 037 039 072 209 MARANTZ 018 037 039 073 MARTA MATSUI 033 036 037 039 MEMOREX 003 017 020 037 039 057 076 087 115 120 049 050 063 MINOLTA 019 026 MITSUBISHI...
  • Page 9 Product Specification Maker (Brand) Name Code Number (3 digit) List SEARS 003 015 016 017 019 020 026 037 047 077 087 SHARP 037 058 129 221 228 SHINTOM SONY 003 016 037 056 060 061 062 080 081 082 129 214 SYLVANIA 037 039 063 TANDY...
  • Page 10 Product Specification 2) DVD Maker (Brand) Name Code Number (3 digit) List ANAM 358 359 AKAI DAEWOO 352 360 DENON 357 361 HYUNPAZ KENWOOD 350 368 369 MAGNAVOX ONKYO 365 366 367 PANASONIC 357 370 PHILIPS PIONCER SAMSUNG 351 363 364...
  • Page 11 ALPHASTAR DSR 122 142 AMPLICA CHANNEL MASTER 020 021 022 025 061 CHAPARRAL 015 016 019 080 CITOH CURTIS MATHES DAEWOO DISH DRAKE 012 013 017 018 113 DX ANTENNA 031 052 062 079 ECHOSTAR 064 095 097 101 ELECTRO HOME...
  • Page 12 Product Specification Maker (Brand) Name Code Number (3 digit) List SONY 105 138 STARCAST SUPER GUIDE 027 123 124 TEECOM 030 033 078 090 091 093 109 TOSHIBA 002 126 143 UNIDEN 023 032 048 049 050 051 054 055 081 082 083 089 103 ZENITH 084 085 086 087 094 119 -11-...
  • Page 13 Product Specification 3. CATV (STANDARD : 004) Maker (Brand) Name Code Number (3 digit) List 001 003 011 045 048 052 059 ANTRONIX ARCHER 012 014 021 031 CABLE STAR CENTURION CENTURY CITIZEN COLOUR VOICE 069 090 COMBANO 083 084 COMTRONICS 026 037 DIAMOND...
  • Page 14 Product Specification Maker (Brand) Name Code Number (3 digit) List REGAL 055 056 REGENCY REMBRANT SAMSUNG 037 072 SCIENTIFIC ATLANTA 003 018 047 048 049 051 052 SHERITECH SIGNAL SIGNATURE SKYLIFE SL MARX SPRUCER 053 081 STARCOM 002 011 015 016 STARGATE 015 037 SYLVANIA...

  • Page 15: Block Diagram

    3. BLOCK DIAGRAM -14-...

  • Page 16: Description Of A/V And Power

    4. Description of A/V(MAIN and SUB PCB) and POWER 4-1. Block Diagram of main IC and TP -15-...

  • Page 17: Overview

    Description of A/V(MAIN and SUB PCB) and POWER 4-2. Overview A/V block (Main and Sub PCB) is Multi Media circuit board that can process various input signals such as video, component, PC, DVI, and analog TV signal. It is mainly composed of switching, sync processing, decoding, analog TV, digital image processing, and system control part 4-2-1.
  • Page 18 Description of A/V(MAIN and SUB PCB) and POWER TP181: Data enable (output of IC140) TP184: Horizontal sync (output of IC140) TP187: Vertical sync (output of IC140) -17-...
  • Page 19 Description of A/V(MAIN and SUB PCB) and POWER TP188: Clock for display (output of IC140) 4-2-2. TV signal Tuner(PC901) receives antenna signal and outputs CVBS and sound signal. IC102 switches out the CVBS and the rest of the signal flow is same as composite video signal flow mentioned earlier. - Main IC A.
  • Page 20 Description of A/V(MAIN and SUB PCB) and POWER - Main TP (Input: 480P, Color Bar Pattern) TP261: Y signal (Input to IC121) TP134: Clock (output to IC121) TP135: Horizontal sync (output of IC121) -19-...
  • Page 21 Description of A/V(MAIN and SUB PCB) and POWER TP136: Vertical sync (output of IC121) 4-2-4. PC (Personal Computer)signal PC signal is switched out by IC109 and input to IC114 for A/D conversion. Then the signal goes through IC140 for digital image processing. - Main IC A.
  • Page 22 Description of A/V(MAIN and SUB PCB) and POWER TP128: SYNC for PLL (output of IC114) TP127: Output clock (output of IC114) 4-2-5. DVI(Digital Visual Interface) signal To process DVI signal, graphic card of AV device reads EDID data from IC101(ROM). Then DVI signal is directly inputted to IC112, which outputs digital 24bit RGB and H, V.
  • Page 23 Description of A/V(MAIN and SUB PCB) and POWER - Main TP (Input: Color Bar Pattern) TP116: Horizontal sync (output of IC112) TP117: Vertical sync (output of IC112) 4-2-6. Video Enhancer and LVDS transmitter (for all inputs) Outputs of IC140 are inputted to IC149(video signal enhancer) which improves picture quality greatly. Outputs of IC149 are inputted to IC150 which is a LVDS transmitter.
  • Page 24 Description of A/V(MAIN and SUB PCB) and POWER 4-2-7. Audio signal processing, KEY, and LED IC104 switches Audio signals and passes a switched signal to IC904 for audio signal processing. IC904 controls sound parameters such as Volume, Balance, and Equalize. The outputs of IC904 are passed to IC901(left), and IC903(right) respectively to amplify the signals.

  • Page 25: Power Pcb

    Description of A/V(MAIN and SUB PCB) and POWER Remote control signal 4-3. POWER PCB <Input Source> Rating: AC100V ~ AC240V (Variable Range- AC85V~ AC276V) Regulation Method: Transistor & Switching Method Input Frequency: 50~60Hz (Variable Range- 45Hz ~ 66Hz) Inrush Current: Below 30A at AC264V Output Voltage is shown below.
  • Page 26 Description of A/V(MAIN and SUB PCB) and POWER Connector Connector number CN806 CN805 Model name B10P-VH B4P-VH Maker The number of pins ALARM (LVP) 5Vcntl 5Vcntl number Connector number CN803 CN804 (NOT USED) CN801 Model name YMW025-10R YMW025-05R YMW025-04R Maker YEONHO YEONHO YEONHO...

  • Page 27: Interface With Pdp Module

    Description of A/V(MAIN and SUB PCB) and POWER 4-4. Interface with PDP Module POWER < PDP Module > -26-...

  • Page 28: Service Mode

    5. SERVICE MODE 5.1 Checking initial menu data (1) Check initial data of User Menu 1) Picture - Mode : Normal BRIGHTNESS : 32 CONTRAST : 48 COLOR : 32 Tint : 32 (CENTER) * Not displayed when input signal is PAL or SECAM Sharpness : 32 - Color Temp.

  • Page 29: Entering Service Mode

    SERVICE MODE 5) Channel(TV input only) - Ch Mode : Cable - Channel : 2 - Memory : Erase - Fine Tune : 0 - Auto Search 5-2 Entering SERVICE MODE To enter SERVICE MODE Press “ VOL” => “MUTE” => “DISPLAY” => “MUTE” BUTTON of Remote Controller (1) Check initial data of Service mode 1) PW 181-1 - Sub Brt : 24...
  • Page 30 SERVICE MODE - Gain G : 128 - Gain B : 128 5) 9883_V - Bias Cr : 64 - Bias Y :60 - Bias Cb : 64 - Gain Cr : 128 - Gain Y : 128 - Gain Cb : 128 6) MDIN 150 - Bright : 128 - Contrast : 64...

  • Page 31: Description Of Service Mode Items

    SERVICE MODE 5-3. Description of SERVICE MODE Items 1) PW181-1 : Image processor control values. Mainly used to adjust White balance. [Note] These values need to be adjusted only after replacing MAIN PCB. These values may vary from set to set. Therefore if these values are recorded before replacing MAIN PCB, you do not need to adjust WHITE BALANCE additionally.
  • Page 32 SERVICE MODE (1) Bias R : For R BRIGHTNESS adjustment (PC) (2) Bias G : For G BRIGHTNESS adjustment (PC) (3) Bias B : For B BRIGHTNESS adjustment (PC) (4) Gain R: For R CONTRAST adjustment (PC) (5) Gain G: For G CONTRAST adjustment (PC) (6) Gain B: For B CONTRAST adjustment (PC) 5) 9883_V : Video port A/D converter control values.
  • Page 33 SERVICE MODE 9) MISC (1) TST PTRN AT : Cycled patterns from R G B WH every 1 minute automatically. (2) TST PTRN MA : Cycled patterns from BK WH R G B by pressing volume up key (3) TV AT OFF : When in TV mode and no signal is detected for 30 min, the set is turned off automatically.

  • Page 34: Adjusting Method

    6. Adjusting Method 6-1. WHITE BALANCE Adjustment 1) Apply 5 Step Gray Scale pattern to Video input terminal (Pattern generator: MIK 7253S) Figure 6-1 Step Gray Scale Pattern 2) Check initial data from USER CONTROL (refer to 5-1) 3) In order to start Service mode, press button in following order “ Vol -> Mute -> Recall (Display) ->...

  • Page 35: Adjusting Power Pcb

    Adjusting Method 6-2. POWER ADJUSTMENTS Video pattern condition: 100 IRE Full White Pattern Power Adjustment is controlling the panel values set by module maker previously. If there is problem after power adjustment, classify as a defect and contact PDP module maker. 1.
  • Page 36 Adjusting Method 2. Vd (Vadd Voltage) : DATA Input Voltage Measurement equipment : Digital Volt Meter ( DC Volt mode ) Adjusting TP : TP206 (See Picture. 6-2) Adjusting VOLUME: Adjusting Voltage : The voltage which is written at upper center of DATA BAR in PDP Module. (Typical Voltage: Picture - Picture.

  • Page 37: Software Upgrade Method

    7. SOFTWARE UPGRADE Method 1. Check whether MAIN PCB is connected to SUB PCB(JP117 to JA109). 2. Connect 9-PIN serial cable to the serial port of the computer. 3. Connect the opposite end of the serial cable to RS-232C port of SUB PCB. 4.
  • Page 38 SOFTWARE UPGRADE Method 6. Select correct COM Port and Baud Rate(115200) as shown below. Then press Flash button to finish setup. 7. Turn on the ac power and then upgrade program will start the download as shown below. -37-...
  • Page 39 SOFTWARE UPGRADE Method 8. When the upgrading is complete, a window (below) will be opened. Press “Finish” button to complete the process. -38-...

  • Page 40: Main Pcb Trouble Diagnosis

    8. Main PCB Trouble Diagnosis 8-1. MAIN & SUB PCB Trouble Diagnosis [NOTE] Refer to “PDP MODULE” section for trouble diagnosis other than MAIN, SUB and POWER PCB. 1. Common checking process when “No signal” or “No raster” (No signal: OSD is working but no images are displaying, No raster: Not even OSD is displaying) Ch eck start Is a weak 1.Check AC connection...
  • Page 41 Main PCB Trouble Diagnosis When Y Cb Cr input : TP261 located in the center of the PCB near IC121. COMPOSITE Input : Check Positive polarity of CE203 located near IC132. S- VHS input : Check Negative polarity of CE284 located near IC159. If above signals do not appear, MAIN PCB needs to be replaced.
  • Page 42 Main PCB Trouble Diagnosis (4) With Component inputs Check TP136(V sync), TP135(H sync) If signals do not appear, replace MAIN PCB. 3. When DTV (1080i, 720P, 480P) signal do not appear on screen (1) Input PC or VIDEO signal and see if PC or VIDEO images are displaying. If “no signal”, check TP188, 187 and 184.
  • Page 43 Main PCB Trouble Diagnosis If above signal do not appear, replace MAIN PCB. -42-...
  • Page 44 Main PCB Trouble Diagnosis 5. When No Sound Check start 1. Check AC connection Do images display on 2. Check Power S/W ON screen? 3. Check MAIN or other PCBs Check the connection of Is the Sound input Jack Jack(PDP and AV device) properly connected? Check the connection of Is the Speaker connection...
  • Page 45 Main PCB Trouble Diagnosis 6. When Key does not operate Check start 1. Check AC connection 2. Check Power S/W ON Does LED next to Power S/W 3. Check other PCBs turn on (red light)? Check the connection of KEY Does LED turn on (green light)? PCB toMAIN PCB 1.
  • Page 46 Main PCB Trouble Diagnosis 7. When Remote Controller does not operate Check start 1. Check AC connection Does LED next to Power S/W 2. Check Power S/W ON turn on (red light)? 3. Check other BLOCKs Check the Battery of Is Remote Controller Remote Controller working?

  • Page 47: Power Pcb Trouble Diagnosis

    Main PCB Trouble Diagnosis 8-2. POWER PCB Trouble Diagnosis After checking High Voltage Board / Scan Relay Board / Data Relay Board (refer to II. PDP MODULE), and the set still does not operate, then check if the following Power PCB’s Trouble Symptoms appear.

  • Page 48: Trouble Diagnosis

    9. TROUBLE DIAGNOSIS [NOTE] Refer to “PDP MODULE” section for module diagnosis. * Refer to Chapter II for Symptoms of other parts with exception of MAIN, SUB PCB and POWER PCB Trouble. 9-1. Facts you must know when trouble diagnosing or repairing (1) Trouble diagnosing and repairing of set mean find out which PCBs or blocks are not working and replace them with new PCBs.

  • Page 49: Trouble Diagnosis And Repairing Method For Representative Symptoms

    TROUBLE DIAGNOSIS (2) Symptoms of MAIN or SUB PCB Trouble <Symptom.1> Only a weak discharge shows on the screen, but it is displaying No images. <Symptom.2> Images are abnormal <Symptom.3> Particular input signal (Video, PC or Component etc.) does not work. <Symptom.4>...
  • Page 50 TROUBLE DIAGNOSIS (2) When weak Discharge exists on screen but “OSD screen” can not be seen <1> Definition of this symptom - When the set is turned on, screen is BLACK but Weak Discharge (luminescence) exists. - OSD does not show on screen and the set does not respond to remote controller or KEY panel buttons.
  • Page 51 TROUBLE DIAGNOSIS Turn AC power OFF Open BACK COVER Disconnect CN801, CN803, CN805, CN806 of POWER PCB and set AUTO & NORMAL S/W of Power PCB to AUTO "SHUT DOWN" occur? Set POWER PCB'S VOLTAGE SWITCH Replace POWER PCB to LOW (refer to Fig. 4) Turn AC power ON (STAND BY) Turn ON the SET "SHUT DOWN"...
  • Page 52 TROUBLE DIAGNOSIS Turn AC PWR OFF Set VOLTAGE SWITCH of POWER PCB to LOW (Picture 6-2) Unplug Connectors connecting High Voltage and POWER PCB(CN806) AC PWR "ON" => PWR "ON" with Remote Controller "SHUT DOWN" occur? AC PWR "OFF" => AC PWR "OFF"...
  • Page 53 TROUBLE DIAGNOSIS AC PWR "OFF" Do DIODE TEST On High Voltage, Scan Relay Board Tests Passed? Replace failed PCB Replace Scan Relay Board AC PWR "ON" => PWR "ON" with Remote Controller "SHUT DOWN" accur? Replace High Diagnosis Complete Voltage Board Fig.

  • Page 54: Assembly List

    10. ASSEMBLY LIST PCB ASS’Y NAME ASS’Y CODE ASS’Y DESCRIPTION PCB MAIN MANUAL AS PTMPMSG048 DPN-4274NHS PCB SUB MANUAL AS PTSBMSG048 DPN-4274NHS CABINET AS PTCACAG048 DPN-4274NHS COVER BACK AS PTBCSHG047 DPP-4272NHS MODULE PDP 4850M07610 NP42B3MF01 MODULE POWER 4850M07910 1H217W HIGH Voltage PKG...

  • Page 55: Structure Of Pdp Set

    11. STRUCTURE OF PDP SET -54-...
  • Page 56 STRUCTURE OF PDP SET COMPONENTS PICTURE REMARK 1) PDP MODULE (with F/SUPPORT) 1a) HIGH VOLTAGE 1b) Common Bypass 1c) Common Relay PKG(R) -55-...
  • Page 57 STRUCTURE OF PDP SET COMPONENTS PICTURE REMARK 1d) Data Relay PKG(L) 1e) Data Relay PKG(R) 1f) Scan Relay PKG-T 1g) Scan Relay PKG-B -56-...

  • Page 58: Exploded View

    COMPONENTS PICTURE REMARK 1h) Digital 2) MAIN BOARD 3) SUB BOARD 4) POWER BOARD -57-...
  • Page 59 STRUCTURE OF PDP SET COMPONENTS PICTURE REMARK 5) FRONT MASK 6) FILTER GLASS 7) BACK COVER -58-...
  • Page 60 -59-...

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