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.
APR. 2005 Contents I. Parts with the exception of MODULE 1. Safety Precautions 2 2. Product Specification 3 2-1. SPECIFICATION 3 2-2. Available Input Signal 5 2-3. Remote Control Setup Code 6 3. BLOCK DIAGRAM 14 4. Description Of A/V and power 15 4-1. Block Diagram of main IC and TP 15 4-2. Overview 16 4-3. POWER PCB 24 4-4. Interface with PDP module 26 5. SERVICE MODE 27 5-1. Checking initial menu data 27 5-2. Entering SERVICE MODE 28 5-3. Description Of SERVICE MODE Items 30 6. Adjusting Method 33 6-1. Adjusting WHITE BALANCE 33 6-2. Adjusting POWER PCB 34 7. SOFTWARE UPGRADE Method 36 8. Main PCB Trouble Diagnosis 39 8-1. MAIN & SUB PCB Trouble Diagnosis 39 8-2. POWER PCB Trouble Diagnosis 46 9. TROUBLE DIAGNOSIS 47 9-1. Facts You Must Know When Diagnosing And Repairing 47 9-2. Typical Symptoms of PCB problem or bad Connection 47 9-3. Trouble Diagnosis and Repairing Method for Representative Symptoms 48 10. ASSEMBLY LIST 53 11. STRUCTURE OF PDP SET 54 12. EXPLODED VIEW 59
II. Parts of MODULE 1. Confirmation Manual 2. Repair Manual
-1- 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.
(3) When opening the BACK COVER, you must turn off power (AC) to prevent any electric shock. When PDP is operating, high voltage and high current inside the Set can cause electric shocks.
(4) When loosening screws, check the position and type of the screw. Sort out the screws and store them separately for reassembling. Because screws holding PCBs are working as electric circuit GROUNDING, make sure to check if any screw is missing when assembling/reassembling. Do not leave any screws inside the set. (5) If you open the BACK COVER, you will see a Panel Gas Exhaust Tube (Picture. 1-1) inside the bracket. If this part is damaged, the entire PDP PANEL must be replaced. Therefore, when working with the set, be careful not to damage this part.
Picture 1-1. Panel Gas Exhaust Tube
(6) A PDP Set contains different kinds of
connector cables. When connecting or disconnecting cables, check the direction and position of the cable beforehand.
(7) Connect/disconnect the connectors slowly with care especially FFC (film) cables and FPC cables. Do not connect or disconnect connectors instantaneously with force, and handle them carefully for reassembling.
(8) Connectors are designed so that if the number of pins or the direction does not match, connectors will not fit. When having problem in plugging the connectors, check their kind, position, and direction.
-2- 2. Product Specification
2-1. SPECIFICATION ITEM SPECIFICATION REMARK 1. GENERAL 1-1. MODEL NO DPP-4242NHS 1-2. CHASSIS NO SP-210P 1-3. SCREEN SIZE 42" (16:9) 1-4. COUNTRY Europe 1-5. RESOLUTION 853(H) x 480(V) 1-6. REMOCON TYPE R-53G12 1-7. SAFETY STANDARD CE(CLASS B), CB 1-8 .TUNIG METHOD FS 1-9. MEMORY CHANNEL 99CH 2. MECHANICAL 2-1. APPEARANCE 1) WITHOUT STAND W x H x D =1044 x 631 x 89 mm 2) WITH STAND W x H x D =1044 x 705.9 x 310 mm 2-2. WEIGHT 1) WITHOUT STAND 30.2 Kg 2) WITH STAND 60 Kg 3. ELECTRICAL 3-1. VIDEO INPUT COMPOSITE(NTSC, PAL, SECAM, PAL-M/N, NTSC4.43) & S-VHS(50/60Hz Y/C) 1 set 3-2. DTV/DVD INPUT 1080 i, 720P, 480P , 480i, 576P, 576i (Y, Pb/Cb, Pr/Cr COMPONENT SIGNAL) 2sets 3-3. SCART INPUT SCART(COMPOSITE, R,G,B, SOUND) R/L 2sets 3-4. PC INPUT VGA ~ SXGA(Dot clock : 120MHz), 15 PIN D-SUB 1set 3-5. DVI INPUT DVI-D INPUT (DVI Jack) 1set 3-6. TV INPUT 1) COLOR STANDARD PAL B/G+I/I+D/K, L-SECAM, L'--SECAM 2) ANTENNA IN ONE INPUT 75 Unbalanced (DIN Standard) 3) RECEPTION CHANNEL VHF LOW : E2 ~ S6 Ch. VHF HIGH : S7 ~ S36 Ch. UHF : S37 ~ E69 Ch. L'-SECOM : FB, FC1, FC 4) IF & SUBCARRIER PIF : 38.90MHz (PAL B/G+I/I+D/K, L-SECAM 33.9 MHz (L'-SECAM) SIF : 33.40MHz (B/G), 32.90MHz (I/I), 32.4MHz (D/K, L-SECAM), 40.4MHz (L'--SECAM) 3-7. SOUND INPUT VIDEO 1set, DTV/DVD 2set, PC 1set, DVI 1set 3-8. SPEAKER OUTPUT 10W(R) + 10W(L) 3-9. POWER REQUIREMENT AC 100V~240V, 50/60Hz ITEM SPECIFICATION REMARK 3-10. POWER CONSUMPTION 260W(Typical) 3-11. RS-232 CONTROL RS-232 Communication (FOR SERVICE UPGRADE) 3-12. AV OUTPUT SCART(CVBS, SOUND R/L) 2 sets 3-11. AV OUTPUT CVBS 1 set, SOUND R/L 1 set -3- Product Specification
3-13. FUNCTION 1) SCALING DVI : H/V SIZE PC: H/V SIZE, POSITION, PHASE, FREQUENCY VIDEO/DVD(480i/576i) : 16:9, 4:3, AUTO, EnlargeLB, EnlargeLBS, PANORAMA DTV/DVD(480P and Better Reolusion) : 16:9, 4:3 2) ZOOM 20 STEP ZOOM and PANING 3) OSD Language 18 Languages (English, Greek, Dutch, German, Russian, Rumanian, Swedish, Danish, Finnish, Norwegian, Spanish, Italian, French, Polish, Portuguese, Czech, Hungarian , Slovakian) 4) OTHERS STILL, SLEEP MODE, SOUND MODE, PICTURE MODE TIMER, TELETEXT (LEVEL 2.5) 5) PIP/POP Make reference to PIP SPECIFICATION (2Tuner PIP, Possible PIP inputs) Shown in the next page. 6) SOUND BBE Technology 4. OPTICAL 4-1. SCREEN SIZE 42"(106 cm) DIAGONAL 4-2. ASPECT RATIO 16 : 9 4-3. NUMBER OF PIXELS 853(H)X480(V) 4-4. DISPLAY COLOR 1,677 Million Colors ( 8bits for each RGB) 4-5. CELL PITCH 1.08(H) x 1.08(V)mm (1 Pixel = a Set of RGB Cells ) 4-6. PEAK LUMINANCE 400cd/m2(WITH FILTER GLASS) 4-7. CONTRAST RATIO 1500:1 (Dark Room) 4-8. VIEWING ANGLE 160 degree(VERTICAL/HORIZONTAL) 5. USERCONTROL & ACCESSORIES 5-1 CONTROL BUTTON(SET) PUSH-PULL S/W : AC POWER BUTTON SOFT S/W: MOVE/CH(UP, DOWN), VOLUME(LEFT, RIGHT), MENU, INPUT SELECT 5-2. REMOTE CONTROL (R-53G12) Power, Universal Selection (TV, VIDEO/DVD, CABLE, SAT), 10 KEYS(0~10), Recall, VCR /DVD KEY (RR, Play, FR, Stop, Freeze, OPEN/CLOSE, PREV, NEXT ), Menu, TV/VIDEO, MULTIMEDIA, Still, Previous Channel, Sound Off, Channel(UP/DOWN), Volume(UP/DOWN), Screen Mode/MIX, Screen Size, Zoom-, Zoom+, Sleep Timer, Multilingual/CYAN, Sound Mode/INDEX,. RED, GREEN, YELLOW, TEXT, REVEAL, UPDATE, EXPAND, SUBPAGE, HOLD, PIP, SWAP, PR+, PR-, POSITION, SOURCE 5-3. ACCESSORIES REMOCON, BATTERY, USERS MANUAL, POWER CORD, FILTER EMI 5-4. OPTIONAL PARTS STAND, WALL HANGER, SPEAKER UNITS(Left, Right)
-4- Product Specification
2-2. Available Input Signal (1) PC & DVI
Resolution H Freq. (KHz) V Freq. (Hz) Remark DVI PC 640x400 37.861 85.080 VESA O 640x480 31.469 59.940 DOS O O 37.861 72.809 VESA O O 37.500 75.000 VESA O O 43.269 85.061 VESA O O 720x400 31.469 70.087 IBM O O 37.927 85.039 VESA O 800x600 35.156 56.250 VESA O O 37.879 60.317 VESA O O 48.077 72.188 VESA O O 46.875 75.000 VESA O O 53.674 85.061 VESA O O 1024x768 48.363 60.004 VESA O O 56.476 70.069 HP&VESA O O 60.023 75.029 VESA O O 68.677 84.997 VESA O 1152x864 67.500 75.000 VESA O O 1280x960 60.000 60.000 VESA O O
(2) DTV -1080i/ 60 Hz -720P / 60 Hz -480P / 60 Hz
(3) VIDEO -PAL, PAL-M, PAL-N -NTSC , NTSC4.43 - SECAM
-15- 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. Composite video, Y/C(S-Video) and SCART (CVBS, RGB) composite video Y/C(S-Video) and SCART(CVBS) have similar signal paths. For the Main signal, IC102 receives these inputted signals and swiches out a selected signal. Then the signal goes into IC132 for video processing, SCART(RGB) signal goes directly into IC132. The output of IC132 goes through IC134 and IC140 for deinterlacing and digital image processing respectively. However, at PIP mode, sub signal has a little bit different path from the Main signal. First of all, IC102 receives input signals such as composite video, Y/C or etc, and swiches out the selected signal like as the Main signal. But the selected signal goes into IC158 for video processing instead of going into IC132. Then it goes into IC140 for image processing. - Main A. IC102: Switching IC (Input: analog inputs Output: an analog output) B. IC126: Teletext IC C. IC132: Video processor (Input: Y/C, CVBS Output: 16bit digital, HV) D. IC134: Deinterlacer (Input: 16bit digital, HV Output: 24bit digital RGB, HV) E. IC140: Image Processor (Input: 24bit digital RGB, HV Output: 24bit digital RGB, HV) - Main TP (Input: Color Bar Pattern) - Sub A. IC102: Switching IC (Input: analog inputs, Output: an analog output) B. IC158: Video Processor (Input: Y/C, CVBS, Output: 24bit digital RGB, HV) C. IC140: Image Processor (Input: 24bit digital RGB, HV, Output: 24bit digital RGB, HV)
TP145: Brightness signal (input to IC132)
TP143: Color signal (input to IC132)
-16- 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- 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. For the Main signal, IC102 switches out the CVBS and the rest of the signal flow is same as composite video signal flow mentioned earlier. Also, Sub TV signal at PIP mode flows similar path to the Sub composite video signal pass except that IC102 swiches out the CVBS signal. - Main A. PC901: Tuner (Input: antenna signal Output: CVBS) B. IC102: Switching IC (Input: CVBS Output: CVBS) C. IC126: Teletext IC D. IC132: Video processor (Input: Y/C Output: 16bit digital, HV) E. IC134: Deinterlacer (Input: 16bit digital, HV Output: 24bit digital RGB, HV) F. IC140: Image Processor (Input: 24bit digital RGB, HV Output: 24bit digital RGB, HV) - Sub A. PC902: Tuner (Input: antenna signal, Output: CVBS) B. IC102: Switching IC (Input: CVBS, Output: CVBS) C. IC158: Video Processor (Input: Y/C, Output: 16bit digital, HV) D. IC140: Image Processor (Input: 24bit digital RGB, HV, Output: 24bit digital RGB, HV) - Main TP (Input: Color Bar Pattern) TP143, 145 TP181, 184, 187, 188 4-2-3. DTV/DVD signal Both DTV(Y, Pb, Pr) and DVD(Y, Cb, Cr) share same jack and signal path. For the Main, IC102 switches out signal and also detects type of signal so that IC121 can convert the analog signal to digital. Then the signal goes through IC134(deinterlacer) and IC140 for digital image processing. On the other hand, Sub DTV/DVD signal is swithed out in IC102 and goes into IC114 for A/D conversion, Then it goes into IC140 for the image processing. - Main A. IC102: Switching IC (Input: Component Output: Component, HV) B. IC121: A/D converter (Input: Component, HV Output: 24bit digital RGB, HV) C. IC134: Deinterlacer (Input: 24bit digital RGB, HV Output: 24bit digital RGB, HV) D. IC140: Image Processor (Input: 24bit digital RGB, HV Output: 24bit digital RGB, HV) - Sub A. IC102: Switching IC (Input: Component, Output: Component, HV) B. IC114: A/D converter (Input: Component, HV, Output: 24bit digital RGB, HV) C. IC140: Image Processor (Input: 24bit digital RGB, HV, Output: 24bit digital RGB, HV)
-18- 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- 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. IC109: Switching IC (Input: Analog RGB, H, V Output: Analog RGB, H, V) B. IC114: A/D converter (Input: Analog RGB, H, V Output: 24bit digital RGB, H, V) C. IC140: Image Processor (Input: 24bit digital RGB, H, V Output: 24bit digital RGB, H, V)
- Main TP (Input: Color Bar Pattern) TP130: Vertical sync (output of IC114)
-20- 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. The output goes through IC140 for digital image processing.
- Main IC A. IC101: ROM containing EDID data (EDID: display capabilities such as resolution, aspect ratio etc.) B. IC112: DVI signal processor (Input: TMDS Output: 24bit digital RGB, H, V)
-21- 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. The converted LVDS signal is transmitted to the digital board.
- Main IC A. IC149: Video enhancer (Input: 24bit digital RGB, H, V Output: 24bit digital RGB, H, V) B. IC150: LVDS transmitter (Input: 24bit digital RGB, H, V Output: LVDS signal)
- Main TP (Input: Color Bar Pattern) TP204: Horizontal sync (output of IC149), refer to TP184 TP205: Vertical sync (output of IC149), refer to TP187
-22- 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. KEY and LED PCBs send signals received from key buttons and LED to IC140 for command processing.
- Main IC A. IC104 B. IC904 C. IC901, IC903
- Main TP (Input: Sound wave 400Hz) TP_AUDIO: AUDIO SIGNAL that goes into MSP3420 before AUDIO PROCESSING
RIGHT (LEFT) : AMP input signal before 30dB amplification
-23- Description of A/V(MAIN and SUB PCB) and POWER
-24- Description of A/V(MAIN and SUB PCB) and POWER
Connector Connector number CN806 CN805 Model name B10P-VH B4P-VH Maker JST JST The number of pins 10 4 1 ALARM (LVP) 5Vcntl 2 GND 5Vcntl 3 GND GND 4 GND GND Pin 5 GND number 6 Vd 7 Vd 8 NC 9 Vs 10 Vs
Connector number CN803 CN804 (NOT USED) CN801 Model name YMW025-10R YMW025-05R YMW025-04R Maker YEONHO YEONHO YEONHO The number of pins 10 5 4 1 5V Stand-by 3.3V 33VT 2 Power 3.3V GND 3 GND GND +17V 4 GND GND GND Pin 5 5V 2.5V -17V number 6 GND 2.5V 7 GND GND 8 12V GND 9 12V 10 NC
* CN806 is connected to CN301 of HIGH VOLTAGE PCB. CN805 is connected to CN302 of HIGH VOLTAGE PCB. CN803 is connected to PC103 of MAIN PCB. CN801 is connected to PC900 of SUB PCB.
-25- Description of A/V(MAIN and SUB PCB) and POWER
4-4. Interface with PDP Module
A/V
POWER
< PDP Module >
-26- 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
3) Screen Mode : 16:9 4) Features - Background : Opaque - Language : English - Child Lock : Off - Enhancer : On - Auto Power : Off - Time Setting Clock : -- --:-- Off Timer : Off Off Time : AM 12:00 Wake Timer : Off Wake Time : AM 12:00 Wake Pro. : 1 Wake Vol. : 20
To enter SERVICE MODE Press " VOL" => "MUTE" => "RECALL" => "MUTE" BUTTON of Remote Controller
(1) Check initial data of Service mode 1) PW 181-1 [Note] Initial data of Service Mode can be different depending on Micom(firmware) version. The actual data applied to each set is equal to the data of when executing "Servide Mode->Reset->Level 1" - Sub Brt : 24 - Sub Cont : 8 - Bias R : 32 - Bias G : 32 - Bias B : 32 - Gain R : 14 - Gain G : 16 - Gain B : 16 2) PW 181-2 - DVI Brt : 16 - DVI Cont : 0 - Sharp Filter : Normal
4) 9883_G - Bias R : 64 - Bias G : 64 - Bias B : 64 - Gain R : 128 - Gain G : 128 - Gain B : 128 5) 9883_V - Bias Cr : 64
-28- SERVICE MODE
- Bias Y : 60 - Bias Cb : 64 - Gain Cr : 128 - Gain Y : 128 - Gain Cb : 128 6) MDIN 150 - Bright : 128 - Contrast : 64 - Color : 64 - NR : Off 7) Enhncr - B&W : ON - FCT : ON - ACR : ON - Gamma : ON - Dither : ON - SEISAI : ON 8) MSP 34xx - Sc pScale : 21 - FM pScale : 25 - NC pScale : 51 9) M2 - Contrast :1 - H Posi Full : 30 - Language : 0 - Option : 2 - CIK Full C40 : 0 - CIK Full C56 : 0 - Vposi Full : 132 10) Misc - Tst Ptrn : AT - Tst Ptrn : MA - AT Search ON : ON - TV AT OFF : ON 11) Info (firmware version information) 12) Reset - Level 1 - Level 2 - Factory 13) Panel (NEC 42" SD) - 50Hz Mode : STD1 - 60Hz Mode : STD1 - Frame Conv : Off - Long Life : Off - Gamma : On - ED : On
-29- 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. (1) Sub Brt : For BRIGHTNESS adjustment (All inputs) (2) Sub Cont : For CONTRAST adjustment (All inputs) (3) Bias R : For R BRIGHTNESS adjustment (All inputs) (4) Bias G : For G BRIGHTNESS adjustment (All inputs) (5) Bias B : For B BRIGHTNESS adjustment (All inputs) (6) Gain R : For R CONTRAST adjustment (All inputs) (7) Gain G : For G CONTRAST adjustment (All inputs) (8) Gain B : For B CONTRAST adjustment (All inputs) 2) PW181-2 : Additional PW181 control values [Note] The following values do not need to be adjusted after replacing MAIN PCB. Therefore you do not need to change initial values.. (1) DVI Brt : For BRIGHTNESS adjustment (DVI) (2) DVI Cont : For CONTRAST adjustment (DVI) 3) VPC3230 : VIDEO DECODER control values. Used to adjust picture quality of VIDEO/S- VIDEO inputs. [Note] The following values do not need to be adjusted after replacing MAIN PCB. Therefore you do not need to change initial values. Main (1) Comm Brt : For BRIGHTNESS adjustment (Video, S-video, Caption) (2) Comm Cont : For CONTRAST adjustment (Video, S-video, Caption) (3) Comm Peak : For SHARPNESS adjustment (Video, S-video, Caption) (4) CVBS Color : For COLOR adjustment (Video, S-video) (5) CVBS Tint : For TINT adjustment (Video, S-video) (6) Comp Brt : For BRIGHTNESS adjustment (Caption only) (7) Comp Cont : For CONTRAST adjustment (Caption only) (8) Comp Cb : For Color (Cb) adjustment (Caption only) (9) Comp Cr : For Color (Cr) adjustment (Caption only) (10) Comp Tint : For TINT adjustment (Caption only) Sub (1) pComm Brt : Fir BRIGHNTNESS adjustment (PIP Video, S-Video) (2) pComm Cont : For CONTRAST adjustment (PIP Video, S-Video) (3) pComm Peak : For SHAPNESS adjustment (PIP Video, S-Video) (4) pCVBS Color : For COLOR adjustment (PIP Video, S-Video) (5) pCVBS Tint : For TINT adjustment (PIP Video, S-Video) 4) 9883_G : Graphic port A/D converter control values. Used to adjust picture quality of PC input. [Note] The following values do not need to be adjusted after replacing MAIN PCB. Therefore you do not need to change initial values.
-30- 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. Used to adjust picture quality of Component inputs. [Note] The following values do not need to be adjusted after replacing MAIN PCB. Therefore you do not need to change initial values. (1) Bias Cr : For Cr BRIGHTNESS adjustment (Component) (2) Bias Y : For Y BRIGHTNESS adjustment (Component) (3) Bias Cb : For Cb BRIGHTNESS adjustment (Component) (4) Gain Cr : For Cr CONTRAST adjustment (Component) (5) Gain Y : For Y CONTRAST adjustment (Component) (6) Gain Cb : For Cb CONTRAST adjustment (Component)
6) MDIN150 : Used to adjust DEINTERLACE performance. Affect component & video input. [Note] The following values do not need to be adjusted after replacing MAIN PCB. Therefore you do not need to change initial values. (1) Bright : For BRIGHTNESS adjustment (Video, S-video, Component) (2) Contrast : For CONTRAST adjustment (Video, S-video, Component) (3) Color : For COLOR adjustment (Video, S-video, Component) (4) NR : Noise Reduction Filter adjustment (Video, S-video, Component)
7) Enhncr : Picture Quality Enhancer. Used to adjust picture quality for all inputs. [Note] The following values do not need to be adjusted after replacing MAIN PCB. Therefore you do not need to change initial values. (1) B&W : Black & White Stretch ( ON: enables B Emph, W Emph, and G Emph) (2) FCT : Favorite Color Technology (3) ACR : Accurate Color Reproduction (4) Gamma : Video Inverse Gamma(=1.47) Correction (5) Dither : Error Diffusion (6) SEISAI : Random dither pattern masking
8) MSP34xx : Sound processor [Note] The following values do not need to be adjusted after replacing MAIN PCB. Therefore you do not need to change initial values. (1) Sc pScale : Prescale adjustment for external input(Video, Component, PC, DVI etc.) (2) FM pScale : FM/AM prescale adjustment (3) NC pScale : NICAM prescale adjustment
9) M2 : Teletext decoder (1) Contrast : Text Contrast (2) H Posi Full : Adjust H position in Full Text (3) Language Teletext Language Group Table 0 West Europe(England/France/Sweden/Czech/Germany/Spain/Italy) 1 East Europe(Poland/France/Sweden/Czech/Germany/Slovenia/Italy/Romania) 2 Turkish/Greek(England/France/Sweden/Turkey/Germany/Spain/Italy/Greece) 3 Cyrillic 4 ARAB/HEBREW 5 FARSI ALL -31- SERVICE MODE
(4) Option 0 : Top 1 : Flop 2 : Top & Flop (5) CIK Full C40 : Adjust pixel clock in half text 40 column text (6) CIK Full C56 : Adjust pixel clock in half text 56 column text (7) Vposi Full : Adjust V position in Full Text
10) 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) AT Search ON : Auto program search and sorting. (4) TV AT OFF : When in TV mode and no signal is detected for 30 min, the set is turned off automatically.
11) INFOR : MICOM(firmware) version information (9 digits model name, 2digits year, 2digits month, and 2 digits date : e.g. DPP4242xH_050315 )
12) RESET (1) LEVEL 1: Reset all values (service mode & user menu). (2) LEVEL 2: Reset all except PW181-1 values (3) FACTORY: Reset user menu values
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) -> Mute" of the remote control. And then select PW181-1 for checking initial data of the SERVICE MODE (refer to 5-2). 4) Attach the sensor of White Balance Meter (CA-100) to the 80% white level of the screen. 5) Adjust White Balance by controlling R, G, B GAIN. . Control R, G, B GAIN values so that the ranges are within DP (Default Value) 10. If the gains are deviated from the range, the SET is disqualified. . Set color coordinate to x=0.285 0.005, y=0.275 0.005, and the Color Temperature to greater than 10,000 K. 6) Attach the sensor of White Balance Meter to 40% of white level on the screen 7) Adjust White Balance by varying the values of R,G, B BIAS. . Control R, G, B BIAS values so that the ranges are within "Default Value" 5. If deviate from the range, classify the SET disqualified. . Set color coordinate to x=0.285 0.005, y=0.285 0.005. 8) Repeat from 4) to 7) until color coordinate is x=0.285 0.005, y=0.275 0.005, and then adjust Sub Contrast for that the luminance is above or equal to 150 Cd/m2 when the sensor of White Balance Meter is attached to 100% of white level on the screen. 9) To exit the Service mode, press Menu button of the remote control.
-33- 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. Vs (Vsus Voltage): Sustain Voltage Measurement equipment : Digital Volt Meter ( DC Volt mode ) Adjusting TP : TP204 (See Picture 6-2) Adjusting Voltage : The voltage which is written at upper center of DATA BAR in PDP Module. (Typical Voltage: 175 V, See Picture 6-1)
Picture 6-1. Power Connection and Voltage Adjustment Label
-34- 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. 6-2)
Picture. 6-2 Power Adjustment Points
< Note > 1. Auto & Normal S/W This switch is used to test power board therefore for normal operation always set it to "NORMAL". Do not touch while operating 2. High voltage S/W Do not touch while operating 3. When replacing a power board make sure to check these switches. . High voltage S/W -> "HIGH" . Auto & Normal S/W -> "NORMAL"
-35- 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. Run Flashupgrader.exe in the PC to excute the program as shown below.
5. Select current Upgrade file - Click "Choose..." button to select the file you want to upgrade. - Select the file (pwSDK.inf) that you want to upgrade.
-36- 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- SOFTWARE UPGRADE Method
8. When the upgrading is complete, a window (below) will be opened. Press "Finish" button to complete the process.
-38- 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
Y
N Is a weak N 1.Check AC connection Does "No si gn al " screen discharge detected 2. Check Power S/W ON appear ? in the screen? 3. Check other PCBs
Y Y Is LVDS connecti on N Check LVDS connection N N correctly connected? CN101 of Digital PCB & Is the signal input Jack Check the connectio n of P100 of Main PCB properly connected? Jack(PDP and AV device)
Y Y Is waveform of DVS,DHS, N N DCLK in the Main PCB normal? Replace Main PCB Does input source (AV Check AV device TP(187,184,181) and/or Sub PCB device) work ?
Y Y N 1. Check other PCBs and connectors Is input selection in the Check input (Refer to PDP Module section) Correct mode ? mode
Y Replace Main PCB and/or Sub PCB
2. When "No signal" in Video, S-VIDEO, and Component modes. (1) First check if PC input is working. If PC is not working replace MAIN PCB. For detail examination, with an oscilloscope check TP188, TP184 a