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S/M No. : DSJ210BEF0
Service Manual
LCD PROJECTION TV (HDTV MONITOR)
Model : DSJ-6000LN
CHASSIS : SJ-210
DAEWOO ELECTRONICS Corp.
http : //svc.dwe.co.kr
Nov. 2002
1. Safety precautions 2. Product specification 3. Remocon specification 4. Adjustment 5. Circuit Manual 6. Trouble shooting 7. Block diagram 8. Exploded View 9. Connection diagram
2 4 5 7 11 27 35 36 37
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1. Safety precautions
CAUTION : Do not attempt to modify this product in any way. Unauthorized modifications will not only void the warranty, but may lead to your being liable for any resulting property damage or user injury. Service work should be performed only after you are thoroughly familiar with all of the following safety checks and servicing guide-lines. To do otherwise, increases the risk of potential hazards and injury to the user.
SAFETY CHECKS
After the original service problem has been corrected, a check should be made of the following:
SUBJECT : FIRE & SHOCK HAZARD
1. Be sure that all components are positioned in such a way as to avoid possibility of adjacent component shorts. This is especially important on those chassis which are transported to and from the repair shop. 2. Never release a repair unless all protective devices such as insulators, barriers, covers, shields, strain relief, and other hardware have been reinstalled per original design. 3. Soldering must be inspected to discover possible cold solder joints, frayed leads, damaged insulation (including A.C. cord), solder splashes or sharp solder points. Be certain to remove all loose foreign particals. 4. Check for physical evidence of damage or deterioration to parts and components, and replace if necessary follow original layout, lead length and dress. 5. No leads or components should touch a receiving tube or a resistor rated at 1 watt or more. Lead tension around protruding metal surfaces must be avoided. 6. All critical components such as fuses, flameproof resistors, capacitors, etc. must be replaced with exact factory types. Do not use replacement components other than those specified or make unrecommended circuit modifications. 7. After re-assembly of the set always perform an A.C. leakage test on all exposed metallic parts of the cabinet, (the channel selector knob, antenna terminals, handle and screws) to be sure the set is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this test. Use an A.C. voltmeter, having 5000 ohms per volt or more sensitivity, in the following manner : connect a 1500 ohm 10 watt resistor, paralleled by a 15 mfd. 150V A.C. type capacitor between a known good earth ground (9water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the A.C. voltage across the combination of 1500 ohm resistor and 0.15 MFD capacitor. Reverse the A.C. plug and repeat A.C. voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts R.M.S. This corresponds to 0.5 milliamp A.C. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately.
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Safety precautions GRAPHIC SYMBOLS :
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the service personnel to the presence of uninsu-lated" dangerous voltage" that may be of suffi-cienty magnitude to constitute a risk of electric shock. The exclamation point within an equilateral tri-angle is intended to alert the service personnel to the presence of important safety information in service literature. Fuse symbol is printed on pcb adjacent to the fuse, with " RISK OF FIRE REPLACE FUSE AS MARKED". The symbol is explained in the ser-vice manual with the following wording or equiv-alent CAUTION : FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SAME TYPE (6.3A, 125V)" and " ATTENTION: AFIN D' ASSU UNE PROTECTION PERMANENTE CONTRE LES RISQUES D' INCENDIE, REMPLACER UNIQUE-MENT PAR UN FUSIBLE DE MEME TYPE ET DE " 6.3A, 125V" .
SUBJECT : TIPS ON PROPER INSTALLATION
1. Never install any receiver in closed-in recess, cubbyhole or Closely fitting shelf space over, or close to heat duct, or in the path of heated air flow. 2. Avoid conditions of high humidity such as : Outdoor patio Installations where dew is a factor. Near steam radiators where steam leakage is a factor, etc. 3. Avoid placement where draperies may obstruct rear venting. The customer should also avoid the use of decorative scarves or other coverings which might obstruct ventilation. 4. Wall and shelf mounted installations using a commercial mounting kit, must follow the factory approved mounting instructions. A receiver mounted to a shelf or platform must retain its original feet (or the equivalent thickness in spacers) to provide adequate are flow across the bottom, bolts or screws used for fasteners must not touch and parts or wiring. Perform leakage test on customized installations. 5. Caution customers against the mounting of a receiver on sloping shelf or a tilted position, unless the receiver is properly secured. 6. A receiver on a roll-about cart should be stable on its mounting to the cart. Caution the customer on the hazards of trying to roll a cart with small casters across thresholds or deep pile carpets. 7. Caution customers against the use of a cart or stand which has not been listed by underwriters laboratories, inc. For use with their specific model of television receiver or generically approved for use with T.V.' s of the same or larger screen size.
Caution for servicing
When the general troubles happen, Remove the back cover of the TV set. But , however if the components (the Air filter, Lamp, Lamp detect switch, or LCD Engine driver PCB, etc) in the front of TV set is out of order, Remove the speaker grill and the front panel of the TV set. Specially, First you have to plug out socket , for exchanging the Fuse of TV set,. When Lamp driver is operated, the high voltage(13~20kV) is generated from the Lamp. Therefore the person only who has the enough knowledge for the high voltage must handle it with care.
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KEY Button and Function
KEY BUTTON Remote controller Lamp POWER TV/VCR/CATV Use to select channel directly 100 Button RECALL VCR Function MENU TV/ VIDEO FUNCTION Green - TV in use Orange - VCR in use Red - CATV in use Use turning on, turning off TV TV / Video / Cable Converter Use to select channel directly 0~9 Use it when selecting a channel number of over 100 It displays currently watching TV channel and its input signal. REW, PLAY, FF, STOP, REC, PAUSE. Use it to make picture adjustment, screen format, sound adjustment, input selection, and utilities. Use this function to make video input selection. It changes in the fallowing sequence TV VIDEO 1 VIDOE 2 VIDEO 3 DVD TV PC DTV can be selected alternately. Use it when selecting either PC or DTV. Use this function to select the channel / to adjust the volume. It returns to previous channel. Use to mute. This feature converts the screen mode each time you press the button from Normal Bright Soft User This feature converts the screen size by changing its aspect ratio. Each time you press the button, it will be change from Normal Wide Panorama Enlarge(LB) Enlarge(LBS) This button allows you to choose one of the Pro-logic modes. Normal Off 3-stereo Wide This feature allows you to choose the mode, Each time the button is pressed, it rotates from Normal Music Movie News User This feature either momorizes the current channel or erases a channel that has previously memorized. This feature allows you choose the caption. Each time the button is pressed it rotates from CC1 CC2 CC3 CC4 off This feature is use to set up the time out of automatic turn off.. This feature allows you to select the language while broadcasting. This button allows you to select the broadcasting alternately.
PC/DTV Channel/ Volume PREV MUTE SCREEN MODE SCREEN SIZE
DOLBY SOUND SOUND MODE ADD/ERASE CAPTION SLEEP MTS TV/CATV
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4-1. Adjustment in Production
Set all adjustment after about 5 Min s heatruning Note : Lamp wattage converted automatically from 160W to 130W after 3 min. Heatrun must be operated after inputing White_Pattern, (no concerned `No Signal') Note : You select `White_Pattern' in `Test Pattern' of SVC Menu. You select Screen Size is `Wide' and Screen Mode is `Normal'. 1) How to Fix Engine. You measure the range of screen s shifting after assembling set. But, in case of the range is over spec ( H : 7mm, V: 3mm, Tilt : 2mm), adjust again in Local CH 8(RETMA) of the factory. 2) Adjustment H/V Position. You select PC Mode to receive reference signal of VG-828 (Program #. 954 : 720p Pattern. 990 : Display Position Pattern) Note : LCD Panel is 720p. You can adjust screen size and position in operating User Menu ( Horizontal Size & Position, Vertical Size & Position). 3) White balance adjustment Input the signal of VG-828 (Program #. 946(NTSC) White Window Pattern.(20 20)) to Video 1. Confirm the initial data of PW364 Mode in SVC Menu. Adjust the White Balance changing R/G/B Gain after setting signal level 100IRE( 255). How to adjust temperature of color. : X = 0.265 0.01 0.270 0.01. You can set Luminance level . Adjust the White Balance changing R/G/B Bias after setting signal level 40IRE( 102). Input the signal of VG-828 (Program #. 972(1080i) White Window Pattern.(20 20)) to DTV. Adjust the White Balance changing AD9884 s Register Value(CXA1315A, CXA1315B, CXA1315C) after setting signal level 40IRE( 102). Adjust the White Balance changing CXA2101 s Register Value(R-Drive, G-Drive, B-Drive) after setting signal level 40 IRE( 102). Confirm the range of White Balance being in limit and measure Luminance value
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4-2. SERVICE MODE
To operate Service : Press the USER Remote controller in order starting with CH Up Mute (You can operate in case INPUT is TV mode, or being input signal) Mute RECALL
Service Mode SVC MAIN PW364 AD9884 CXA2101 VPC3230 Test Pattern Lamp Watt ENG Control Use Time Factory Set (Initial Data of the Service mode) (Adjusting Brightness Contrast and White Balance of full input) (Adjusting Brightness Contrast of DTV/ PC input) (Adjusting Brightness Contrast and White Balance of DTV input) (Adjusting Brightness Contrast of TV / VIDEO/DVD input) (Displaying in order R G B W BLK (Adjusting Lamp Wattage 160W or 130W) (Adjusting LCD ENGINE UNIT) (Total usage time of LCD panel) (operating Initalization) (Model name, micom version)
DSJ6000LW200209181500
* PW364 (Adjusting Brightness Contrast and White Balance of full Iinput)
Item S Bright S Contrast R Bias G Bias B Bias R Gain G Gain B Gain
Initial Value 64 64 63 63 63 63 63 63
Description Screen Brightness Screen Contrast Red Color of Low level signal Green Color of Low level signal Blue Color of Low level signal Red Color of Low High signal Green Color of Low High signal Blue Color of Low High signal
Fixing Value Fixing Value Adjusting Value Adjusting Value Adjusting Value Adjusting Value Adjusting Value Adjusting Value
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AD9884 (Adjusting Brightness Contrast of DTV/ PC input ) R Gain G Gain B Gain CLP PL CLP DR Phase ITEM CXA1315A CXA1315B CXA1315C 148 148 148 4 4 15 Initial Value 42 40 40 Fixing Value Fixing Value Fixing Value Fixing Value Fixing Value Fixing Value RED MIN RED MAX GRN MIN GRN MAX BLU MIN BLU MAX 148 148 148 148 148 148 Reading velue automatirally accorling to adjustment state
Description Adjusting Red Color of Low level signal Adjusting Green Color of Low levelsignal Adjusting Blue Color of Low level signal
Adjusting Value Adjusting Value Adjusting Value
CXA2101 (Adjusting Brightness Contrast and White Balance of DTV input) ITEM Picture Bright R Drive G Drive B Drive BLK BTM Initial Value 63 8 22 18 16 15 Description Contrast Brightness Adjusting Red Color of High level signal Adjusting Green Color of high levelsignal Adjusting Blue Color of high level signal
Fixing Value Adjusting Value Adjusting Value Adjusting Value Adjusting Value Fixing Value
VPC3230 (Adjusting Brightness Contrast of TV / VIDEO / DVD input) ITEM Sub Bright Sub Contrast Initial Value 0 Adjusting Value 20 Adjusting Value
Test Pattern R => G => B => W => BLK Lamp Watt (160W is 25% brighter than 130W but lifetime of Lamp is shorter) 160W 130W ENG Control (Adjusting LCD ENGINE UNIT ) GAMMA (NORMAL, Natural1, Natural2) : NORMAL(NO GAMMA compensation ), NATURAL1=NATURAL2 ROTATION Scren Rotation (0, 90, 180, 270) COLOR Screen s color compensation sub CPU sub CPU s initalization in Engine Unit
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TEMP V-T
Detecting the femperature in the inside of ENGINE Engine V-T compensation
*Use Time : Total usage time of LCD panel *Factory Set (Operating Initalization)
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1. Specification / Feature
1-1. Product Specification 1-2. Product Feature 1-3. General Block Diagram
2. Power Supply
2-1. Summery 2-2. Block Diagram 2-3. Power structure 2-4. Power Action manual
3. Sound & Audio Amp
3-1. Summery 3-2. I/O Specification 3-3. Block Diagram 3-4. Action Manual
4. Video
4-1. Summery 4-2. Block Diiagram 4-3. Video Circuit Manual 4-4. *IF and Video Manual
5. Engine Drive
5-1. Summery 5-2. Block Diagram 5-3. Action Manual
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1.Specification / Feature
1-1.Product Specification
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1-2.Product Feature TV Turn on/ off : The Lamp feature When the main power lamp flickers on green, the screen will gradually turn on. During this instance, the power button will not operate. When the process is completed, the main power lamp lights on green. It is LCD-Projection TV characteristics that it takes a little while for the video to be displayed on the screen when it is turned on. This is not malfunctioning; thus, please be patient and wait for a moment. The degree of brightness will decrease insignificantly after 3 minutes is passed. This is not a breakdown; it is only using a power saving process to maximize the lamp s lifetime. (Lamp watt : 160W -> 130W) When the power buttons are pressed, the main power lamp may flicker in green, but the secondary power lamp may flicker in red and orange alternately. In this case, the TV s main power has been erroneously pressed, or has been turned off improperly by a power stoppage or by any other reason. However, please wait for an instant, and the TV will be back on (the latest 1min. 30sec.) since this is not a malfunctioning of the product. Turning off the TV set. Press the power button on the remote controller or that of the TV set. Audio and Video will be turned off and the main power lamp will flash. In green at this time. This is not malfunctioning nor an error; it is just a process of cooling the lamp off. During this time, the power button will not operate. A red light will light up after a minute.
1-3. General Block Diagram
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2. Power Supply
2-1. Introduction The POWER PCB is composed of 140W Power for 60 LCD PTV(DSJ-6000LN) as well as the Power that makes 380V and 18V primary voltage for Ballast. 2-2. Block Diagram(attach) 2-3. Power Supply Component (1) Input Power : 100V ~ 240VAC, 50/60Hz (2) Consumption Power : 270W (3) Power Supply for the secondary side : See the table below.
No.
1 2 3 4 5 6 7 8 9
location
T802 T802 T802 T802 T802 T802 L805 T802 T803
voltage
D5V 33V A5V 12V 9V 18V 380V 17.5V 7V/10V
Function
Main and Video/Engine Power Tuning B+ Main and Video Power Main and Video Power Main and Video Power Ballast and PFC Control Power Ballast Power Engine Power Engine Fan Power
Current
1,000mA 3mA 1,000mA 300mA 80mA 150mA 470mA 300mA 1,000mA
remarks
F/B Line
Primary Primary
10V (more than 45 degree of Engine temperature
10 11 12
T803 T803 T801
+15V -15V ST5V
Audio Power Audio Power Stand-By Power
3,000mA 3,000mA 600mA
2-4. Description of Operation (1)Power Supply and Stand-by Power (1-1) The voltage coming through Bipolar Power Code (PC801) passes through the Line Filter composed of EMI Filter (L801, L802), X-Capacitor (C801, C803, C806), and Y-Capacitor (C822, C823) and is rectified and smoothed in the Bridge Diode (D803, D806, D831, D832) through the Mimetal that is the P303E Temperature Sensor (Power OFF when Lamp Temperature 125 ~ 135). (1-2) The smoothed voltage is supplied to the TOP232P that is STAND-BY POWER IC(1804), and the TRANS secondary winding supplies STAND-BY Power (5V) for U-COM.
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(2) MAIN Power Operation (2-1) PWR SWITCH ON(HIGH) Signal is supplied from U-COM to the Base of Q804 via P805M CONNECTOR, Positive Terminal Relay(Y801) is activated, then Starting Voltage is supplied to the No.4 pin (Vin) of STR-F6656(IC802, IC803) via R836 and R844. (2-2) AC Power is rectified in the Bridge Diode(D801), and is applied to P winding of the TRANS, and reaches 16V of TRANS Auxiliary Winding (No.7 pin), then Control Circuit is active by the operation of Start Circuit. (2-3) The winding voltage of the Auxiliary Winding (No.6 pin) is rectified, 18 V is upplied to 1601(FA5332M) No. 3/16 pins, and the phase of Voltage/Current is compensated, No.13 Pin Reference Voltage/No. 15 Pin OSC Timing C/R oscillates internally, and mixed to AND Gate, passes to No.13 pin, and its voltage is elevated to DC380V from L805 by FET Switching via Debias Stabilization Circuit (Q801/802). The elevated 380V is smoothed through Diode(D802), and is supplied to the Ballast via P804B. (3) Specification of STR-F6656 STR-F6656 is the Hybrid IC for the power of Flyback Converter-type Switching where Power MOSFET and IC for Control is installed. The characteristics of this IC are parts to be added are just a few, and various protection functions such as Transient Current Protection, Transient Voltage Protection, Overheat Protection), and has the QuasiResonance function proper for miniaturization and standardization. The detailed specifications of this IC is as follows. Pin Number Symbol 1 OCP/F.B 2 S 3 D 4 Vin 5 GND Name OCP/F.B Source Drain Vin GND Function OCP detection input and Feed Back MOS FET Source MOS FET Drain Control circuit voltage Input Ground
Symbol OVP TSD
Function Over voltage protect Over temperature protect
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(3-1) Power Supply for Vin When Vin Terminal (No.4 pin) voltage that is charged to C821, C830 through the Starting Resistance reaches 16V(Typ), the Control Circuit inside the F6656 starts to operate. Here, the Circuit Current is limited to 100 A(MAX) before F6656 operates, so the high Starting Resistance (47K ,2W) is used. After F6656 operated, the voltage coming out of D winding of TRANS (T802, T803) is rectified and smoothed, supplying the stable voltage to the Vin terminal. Here, dl winding is rectified and smoothed via D812, D816, C821, and C830, and about 16V is supplied to the Vin terminal (No.4 pin) of F6656. (3-2) OCP/F.B Terminal (Oscillator, Electrostatic Voltage Control Circuit) Inside the F6656, there is the Oscillator that generates Pulse signal for controlling electrostatic voltage in the secondary side by turning ON/OFF the MOSFET using the charging/discharging of C . When AC input is high or Load Current is low, the inflow of the current of F/B terminal increases, and ON time decreases. The Oscillator has the Transient Current Protection Circuit (O.C.P. circuit) of Pulse by Pulse type that controls the oscillator s output by detecting MOSFET Drain current s peak value per every pulse. (3-3) D/S Terminal (Driver Circuit) This Circuit is the circuit that charges/discharges the capacity between Gate-Sources of Power MOSFET by receiving Pulse signal. (3-4) Latch Circuit This Circuit is the circuit that stops Power Circuit by keeping the output of the Oscillator to LOW when the Over Voltage Protection Circuit (OVP) and Overheat Protection Circuit (TSD) operate. The Sustaining Current of the Latch Circuit is 400 A(MAX) when Vin terminal voltage is 8.5V, so if the current over 400 A is made to flow to the Vin terminal, the Power Circuit keeps normal. This circuit activates the Latch Circuit only when OVP, TSD Circuit operates or when external signal input is kept over 10 sec, by setting the delay time in accordance with C inside F6656 in order to prevent erroneous operation due to Noise, etc. Besides, even though Latch Circuit operates, it is operated in electrostatic power circuit in the Control Circuit so the Circuit Current gets elevated, decreasing the Vin terminal voltage dramatically. When Vin terminal voltage gets below Termination Voltage (10V TYP), the Circuit Current increases again, so Vin terminal oltage decreases. That is, Vin terminal voltage increases or decreases between 10V and 6V when Latch Circuit operates, it is possible to prevent Vin terminal voltage rising bnormally. To cancel the Latch Circuit, Vin terminal voltage should be decreased to below 6.5V. Generally, it can be cancelled by turning off the AC power. (3-5) Overheat Protection Circuit (TSD) This Circuit is the circuit that operates the Latch Circuit when the Frame temperature exceeds 150 degrees (TYP). In this circuit, the real temperature detection is
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carried out in the Control System, but MOSFET as well as Control Circuit element is on the Frame, so the circuit operates same for the overheat of MOSFET. (3-6) Transient Voltage Protection Circuit (OVP) This Circuit is the circuit that operates the Latch Circuit when the Vin terminal voltage exceeds 22V (TYP). Basically, this circuit protects Transient Voltage, but the Vin erminal is supplied from the TRANS Auxiliary Winding, and this voltage is roportional to the output voltage, so it operates when the secondary side out is transient voltage such as when Control Circuit is open.
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3. Sound & Audio Amp
3-1. Introduction Sound Processor is composed of Switching that selects signal proper to the Select Mode among Sound Signal of the Video Input (SIF, DVD, Input 1/2/3) and the Sound Signal of Graphic (DTV, PC); and Signal Processor that generates Sound Signal (C, W, SL, SR) which is Dolby decoded through MAIN L/R Sound Signal and IIC(SCL/SDA) Interface. Besides, it is composed of Amplifier that amplifies the signal generated by Volume Control Block to the sound signal proper for speaker capacity. 3-2. I/O Description (1) Sound Processor
Partition
NAME Sound SIF NTSC L/R DVD L/R, DTV L/R PC L/R SCL, SDA MAIN L/R C W SL/SR HP L/R MON L/R VOL L/R VOL C VOL W VOL SL/SR A_MUTE
INPUT I2C
DESCRIPTION SIF Signal from TV TUNER The Selected Audio signal of 3 input Video The Audio signal of the DVD & DTV The Audio signal of the PC The controlling I2C signal of SOUND IC & DOLBY IC The Audio signal L/R The Audio signal Center The Audio signal Woofer The Audio signal SURROUND L/R The Audio signal HEAD_PHONE The Audio signal MONITOR Volume control L/R SPEAKER Volume control CENTER SPEAKER Volume control WOOFER SPEAKER Volume control SURROUND L/R SPEAKER AUDIO MUTE
Sound
OUTPUT
Control
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Partition
INPUT
NAME
L/R
DESCRIPTION
Output L/R SPEAKER Output CENTER SPEAKER Output WOOFER SPEAKER Output SURROUND L/R
SOUND PROCESSOR Audio signal (the excepted HP L/R, MON L/R)
OUTPUT
C W SL/SR
3-3. Block Diagram
3-4. Description of Operation Sound Processor is composed of Switching that selects signal proper to the Select Mode mong Sound Signal of the Video Input (SIF, DVD, Input 1/2/3) and the Sound Signal of Graphic (DTV, PC); and Signal Processor that generates Dolby Prologic Sound Signal via Sound DSP. In the VIDEO the SIF signal is received from TUNER in MSP3440G (SOUND PROCESSOR IC) generates sound signal L/R. Besides, Among the Sound Signal (NTSC L/R: VIDEO_1/2/3 Sound Signal L/R selected from the TUNER Sound Signal L/R, CXA1855 (VIDEO SWITCHING IC), and DVD Sound Signal, a proper sound signal is selected, then it is outputted to MAIN L/R. In the GRAPHIC, a proper signal is selected in DPL3519A among the sound signal of DTV and PC, and outputs to MSP3440G, so MAIN L/R can be selected. Also, D/A converted Sound Digital signal is generated to SERIAL ATA(IS2_DA, 12S_CL, 12S_WS, I2S_OUT), so Central Sound signal (C) which is DOLBY PROLOGIC Sound Signal, Woofer Sound Signal (W), and Surround Sound signal(SL/SR) is generated.
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In the AMPLIFIERM, the signal component that passed Volume Control Block is amplified to the respective GAIN (MAIN L/R, C, W, SL, SR). L/R SOUND and SURROUND L/R Sound are adjusted simultaneously, besides L/R Volume Balance can be adjusted. The Sound of Center and Woofer is adjusted independently, and Volume Balance cannot be adjusted. The Sound Signal decreased by Internal Volume Control of MS3440G and DPL3519A is amplified through TDA7265 (25W+25W STEREO AMPLIFIER with MUTE). Main Sound L/R and Central Sound Signal is connected to each Speaker via connectors, and the Sound Signal from Woofer and surround is connected to external Jack, then is outputted when additional Speaker is connected.
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4. Video
4.1 Introduction The VIDEO Signal Processing Circuit of DSJ-6000LN converts PC signal(VGA~UXGA), DTV signal (Y, Pb, Pr 1080i, 720P, 480P@60Hz), DVD signal (Y, Cb, Cr@60 Hz), Y/C signal (60 Hz) as well as Image Processor PW364, to HD Video signal (1280 x 720 : Progressive) proper to LCD Projection TV device of this appliance type. It is composed of Video Processor, Digital TV Processor, Graphic Video Processor, Image Resizing Part (PW364), LVDS Output, CPU Circuit for System Control. 4-2. Block Diagram
4-3. Circuit Manual (1) Video Processor Circuit Video Processor receives Video signal whose Y/C Color Difference is separated, then converts A/D in VPC3230 that is Video Decoder, and processes Component Video Signal (Y/UV), and converts the Interlaced Video signal received from Line Doubler SDA9400 to Progress Video signal. Also, DVD signal that is entered in Component Video signal enters to another terminal, and processed likewise.
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(2) Digital TV Signal Processor Circuit The Digital TV signal entering to the Component type is processed in CXA2101A that is IC for processing TV Video Signal, and is outputted to Analog RGB signal, then is switched according to the RGB signal of OC. (3) Graphic Video Signal Processor Circuit The RGB signal selected in the Digital TV signal and PC signal is converted to two channel 48bit digital RGB signal in AD9884D which is high speed A/D converter. (4) Image Resizing Circuit The Digital Video signal and Digital Graphic signal that enter to PW364 from the previous part are selected, and Image Resizing is done that converts those signals in the proper form, then the signal is outputted in 24bit RGB signal. (5) LVDS Output Circuit The Video signal and Synchronizing signal (H,V sync) converted to the display format of this appliance system is converted to LVDS signal in the TH63LVDM83A that is the LVDS Transmitter in order to transfer to LCD Engine. (6) System Control Circuit This system is composed of two U-COM, and the overall system control is done in the Main U-COM, the signal is sent that controls all IC except Engine Block, and the System Control controls regarding image resizing, and process the key entered from the Front Key, then controls the front-display LED.
4-4. IF Circuit & Video Circuit Structure This IF Circuit and Video Circuit receives NTSC broadcasting signal and its corresponding external video signal, DVD, DTV, PC signal via I set of Antenna Input in the terminal board and 6 set of external video jacks including 3 set of NTSC video jacks, then video processing is done properly. (1)IF Circuit IF Signal Processing is as follows. (1-1) NTSC TV RF Signal received from the Antenna Input of the Terminal Board enters to TUNER (TU601). 5V, 9V : TUNER Main Power 33V : Voltage for Tuning (Vt Voltage) (1-2) A desired broadcasting channel is selected from the TV broadcasting signal selected by Remote Control or Switch in such a way that the data sent from pins of SDA and SCL of -COM are routed to Pin 4 and 5 of DATA/CLK of
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TUNER, and those data are converted to TUNER (IF) signal in the PLL inside the Tuner and Tuner IC. (1-3) The carrier of the selected broadcasting signal is converted to PIP frequency (P: 45.75MHz, S: 41.25MHz, C: 42.17MHz), and modulated to IF signal of TU. The modulated IF signals are converted to Composite Video and SIF signal in the internal IF Module, then are sent to each Video_Out Port(#16) and Audio_Out Port (#13). (2) NTSC Video Signal Switching Circuit
Signal Processing of Video Signal Switching Circuit is as follows. (2-1) In the case of NTSC ANT Input, the Composite Video Signal sent from Tuner Video_Out Port (#16) is sent to TV Pin 41 of Video Switching IC CXA1855(U101) via Tr Buffer(Q101), and 3 set of external Video Jack Input 1, 2, 3 are, respectively, sent to Switching 1,2,3 Input Port of CXA1855. (2-2) The 4 set of NTSC Video signal sent to CXA1855 is switched to the inside and is outputted in the Video_Out 2 terminal. At this time, one of the Composite signal coming from Vout Pin 23 and Yout2, Cout2 Pin (19, 21) is selected via Switching IC MM1232(U104). (2-3) The selected Composite or Y/C signal is sent to 3D Comb Filter IC uPD4082(U105) via Filter, and is processed. This IC is three dimensional Y/C Separate IC, and has the external AD Converter and 4M bit EDO Memory, and process Y/C separation and YCNR (YC Noise Reduction) when Composite and Y/C signals are coming. (2-4) The Y/C signal processed in D Module is routed to Video Board via TR Buffer (Q106, Q107), respectively. (2-5) In the case of Monitor Out, 3D Module Input Composite signal and 3D Module Output Y/C signal are outputted via Buffer (Q102, U102, U103). (3) DVD, HDTV, PC SIGNAL PROCESSING Circuit Input of DVD, DTV, and PC signals are sent to A/V Board and Side Board Jacks, then sent to Video Board directly.
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5. Engine Drive
5.1 Introduction The Engine Drive Signal Processing Circuit of this DSJ-600LN is the circuit for generating and supplying Video Signal and Driving Signal to activate 3 LCD Panels. It is composed of RGB Video Processing, Panel Driving Signal Generating, and Panel Auxiliary Signal Generating sectors.
5.2 Description of Operation 5-3. Circuit Manual (1) RGB Video Signal Processing Circuit RGB 10 bit of Digital Video signal (3.3 Vpp) processed by G/A for LCD Panel and IC(SLA550TH) for compensating Unit is outputted along the LCD Panel connected to LCD driving board in such a way that 10 bit digital data are converted to the Video Signal for driving LCD of 2x6 channel their levels are adjusted (10.0Vpp; 2.0V~12.0V) by Serial D/A Converting IC(M62393). (2) Panel Driving Signal Generating Circuit The Panel Driving Timing Signal (3.3Vpp) developed from IC(SLA550TH) for processing Panel Signal is supplied to the LCD Panel by Level Shifter IC (ET1030F0A) by doing level shift to Level(15.5Vpp) necessary for driving the Shift Register inside the LCD Panel.
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(3) Panel Auxiliary Signal Generating Circuit The Panel Driving Auxiliary Signal developed from IC(SLA550TH) for processing Panel Signal is supplied to Panel through 4 each composite Transistor(XN4051) by doing level shift to the Level(10.0Vpp; 2.5V~ 7.5V) necessary for free-charging the Video Line inside the Panel by the Level Shifter IC(ET1030F0A).
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No "Power On" (Timer on/off and the main power lamp lighting in red)
Check fixing state of air filter (Power On after removing air filter and pressing Detect S/W by hand or tape)
NG
OK
Check whether Sensor (DETECT S/W)is wrong or not, and fix air filter correctly
Check Fixing state of lamp Door side (After pulling up Door side, Power On when pressing Detect S/W on the left side of engine by hand or tape)
NG
OK
After checking Detect S/W is wrong or not, pull down and fix Door slide correctly
Check voltage of pin 14 (PWR-CTL) in P612V at Main PCB
0V
Replace VIDEO PCB ASSY
When turning set on, the voltage is more than 1V in a short time, then it goes to 0V
Check voltage of pin 1 (PWR) in P605 at Main PCB
Replace POWER PCB ASSY
0V
Check whether all 4 Pins in P619L and P621L at Main PCB are short
Contact badness of P619L, P621L CONNECTOR Replace CONNECTOR
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No "Power On" (Timer on/off and the main power lamp flickering in red and orange alternately)
OK
Remove lamp and then fix it again
Check normal operation
Check output voltage of P804(POWER) (380V / 18V)
Replace Power PCB
Check voltage of pin 1 (Lamp_On) in P626C at Main PCB
Replace Main PCB
Check voltage of pin 3 (Error) in P626C at Main PCB
Replace lamp and then check mormal operation
Replace LCD ENGINE
Check voltage of pin 3(32PIN) in P612V at Main PCB
Less than 2V
Replace MAN PCB
Replace VIDEO PCB
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No "Power On" (Timer on/off and the main power lamp lighting in orange) POWER ON Check if Engine Fan acts for a moment and stops (Check if air blows to center ventilation hole on backside of product)
NO
The voltage is mane Then DC 5V in a short Time, then it goes to 0V
Check voltage of pin 7(7V/10V) in P806M at Power PCB
0V
Check voltage of pin 5 (ID_1) in P626C at Main PCB
More than 0.5V
Replace Power PCB
Remove Engine Unit, Check if it's short between pin 3 (Red wire) in P922E at interior PCB (1x3cm) in Eugire and Pin 5 in P626C at main PCB
NO SHORT
0V
SHORT
Check "Short" between output voltages at Power PCB and GND
NO YES
Contact badness of Connector
Replace LCD ENGINE
Replace SHORT PCB
Check voltage of pin 3 (32Pin) in P612V at Main PCB Less than 2V Replace MAIN PCB More than 2V Replace VIDEO PCB
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No "Power On" (The main power lamp is not red)
The main power lamp is not red
FUSE CHECK
R895, R896 SHORT CHECK
D803, D806, D830, D831 DIODE CHECK
I804 CHECK (TOP232P) If DRAIN and SOURCE Impedance value approach 0 ohm, replace I804 because it is broken
I821 CHECK (POTO COUPLER CHECK)
D836 CHECK Check always because it's part of feed back
Check if ST5V is correct.
When pressing Power button, check if The main power lamp is red
END
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No "Power on" (the main power lamp is red. stand-by Power is on)
Check P805M WAFER Power ON/OFF
SPEC.3.3V, (if it is more than 1.5V:Normal operation), if less than 1.5V:Check path of MAIN. VIDEO Circuit
Check Q804 Tr, D829 SHORT TEST
Check if POWER CORD is OPEN
Check D801
Check Q803
Check I802 18V Regulator
Replace
Check normal voltage Check voltage waveform of Q803
Replace 5332 Module
END
END
END
When part is destroyed by lightning and shock, D801, Q803, FUSE is easily damaged I802 is often destroyed by shock of the primary and the secondary
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No Display (DTV / PC Input)
Does Power LED operate normally in green?
Lamp, Fan, Abnormal Power
When pressing Menu button, is OSD displayed?
check LVDS of IC225E #2,3 #5,6 #8,9 #11,12
Check signal output of DTV of PC and Set Connection
Is `No Signal' displayed?
Check output of CLK in IC213 Check Sync Output in IC216 ClK : #3, H_sync : #6, V_sync: #3
Check sync output in IC227 H_sync : #3, V_sync : #6
If pressing "recall" key, does correct resolution to input signal ?
Check CLK output and Sync in IC217 CLK : IC213 of #2 H_sync : IC216 #5, V_sync : IC216 #2
Check DTV/PC_SEL signal #9, 10 of IC224 DTV(high), PC(low)
Check R,G,B output of IC227 R: #14, G:#15, B:#4
IC216 abnormal
Check H_sync output of IC236 #7 & sync output of IC228 h_sync : #7, V_sync : #3
Check DTV/PC_SEL signal #9,10,11, of IC230 DTV(high), PC (low) Check R,G,B output of IC226 R : #35, G : #37, B : #39 Check PC input of P211M H_sync: #29, V_sync : #31 R : #23, G : #25, B : #27 Check Y, Pb, Pr, SCP input of P226 Y : #5. Pb : #4, Pr : #3, SCP : #31
1
Check P211M DTV input Y : #17, Pb : #19, Pr : #21
Checkconnectionbetween#17,19, 21 of P211M and #1(Y), #2(Pb) #3(Pr) of J108
Checkconnectionbetween#23,25,27,29,31 of P211M and #1,3,5,7,9 of P913M (side jack)
1 END END
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No Display (RF / VIDEO / DVD)
Does Power LED operate normally in green?
LAMP, FAN, Power abnormal
When pressing Menu button, is OSD displayed normally?
CheckIC217 (PW364) output (#DPT00~#DPT23)
Check IC220 (LVDS IC) output (#LVDS00~#LVDS09)
Repair Engine BOARD
RF signal is off
RF, VIDEO Screen is off
Only DVD Screen is off
Check connection of antenna
Check U101 (1855) output (#19-C, #21-Y, #23-V)
Check IC219 (3230) input (#4-B, #5-G, #6-R) Check after repair
Check after connection
Check Input signal (480i)
Check TU601 (TUNER output)
Check U104 (1232) output (#5-Y/V,#6-C) Check after IC219 Repair (#Y0~#Y7, #C0~#C7) Check after connection Check after Q106, Q107 Repair (#E-C, #E-Y) Is IC219 (3230) output correct? (#Y0~#Y7, #C0~#7)
Check after connection Check after Q101 repair (#E)
Is all Screens not displayed? (RF / VIDEO / DVD)
repair
Check after IC218 (9400) repair (#VPT00~#VPT20)
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No SOUND
Check SOUND MUTE
Check SPEAKER CONNECTOR
Check each input CABLE
Check input signal
RF
Check TU101 SIF input
Check IC601 (#67) Signal
External Input 1/2/3
Check U101 (#20,22) output
Check IC601 (#47,48) Signal
DVD
Check P610A (#10,11) path
Check IC601 (#50,51) Signal
HDTV
Check P610A (#15,16) path
Check IC602 (#50,51) Signal
PC
Check P613S (#11,13) path
Check IC602 (#53,54) Signal
Check IC601 & IC602 output
MAIN L/R : IC601(#27,28) WOOFER : IC601(#30) HEADPHONE : IC601(#36,37)
CENTER : IC602(#28) SURROUND L/R : IC602(#24,25)
AUDIO AMP Check input/output
MAIN N/R INPUT : IC604(#7, 11) CENTER/WOOFER INPUT : IC605(#7, 11) SURROUND L/R INPUT : IC606(#7, 11)
OUTPUT : IC604(#2, 4) OUTPUT : IC604(#2, 4) OUTPUT : IC604(#2, 4)
END
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Z86129 (caption/rating)
-35-
108 52
99
51 50
110 111 132 49 48
47 46
92 93
53
109
101
34 35 45 54 113 55 56 115 116 61 62 106 107 63 64 65 66 105 67 68 69 70 76 72 117 77 78 118 113 13 14 15 16 17 18 79 80 81 19 20 73 74 119 94 120 86 87 88 89 122 85 84 82 83 22 23 90 24 60 102 103 133 71 100 75 57 58 59 95 96 97 98 32 33 40 41 30 31 28 29 91 121 27 25 26 38 39 36 37 131 43 44 42 112 114
117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 REMARKS No.
UNITS SCALE
4957800400 7122402412 4957904400 -------4957700300
4957701200
4953901900 7001401211 4952700050 97P2316600 4956900300 4957904600 4957700800 4957700700 4957700600 4957700500 4956900100 7172401412 97P4602700 4952600100 4957700100 4956000700 7178301212 4953903501 4953903101 4957903800 4952800401 7173301011 4953901600 7173301011 4953902100 4953902000 7173301011 4953901800 4952800500 4957300600 7008301011 4953903601 4952301100 4956900200 7008301011 4953802701 7008301011 4957502100 4956800600 4953802601 7173301011 4957203100 7008301011 4957502601 4957501900 7178301212 4957903801 4953903701 7008301011 4957501800 4957700400 4957701100 4957701000 7172401412 4952101501 7172401412 4957904300 4956000600 4957502001 4955901100 7172401412 4953600701 4953802400 7173301011 4953501200 7172401412 4953902500 7172401412 4953902801 7172401412 4953902701 7172401412 4953902600 4956000600 4953902900 4956000600 4953903000 4955901300 4956000700 4952300901 4952200300 4956000600 4952301001 4952800301 4856716000 4954800501 4955000301 7178301212 4953501101 7173301011 4955700601 4955700501 7172401412 4952301101 4953802501 4857818503 4957904700 4952002000 4857818503 4952001800 7171301011 4953901700 4952001900 4952001700 PART CODE mm N/S
DESIGNED BY
CLOTH BLACK SCREW TAPTITE DC FAN SHIELD CASE CUSHION CASE ENGINE VIDEO PCB AS POWER PCB AS MAIN PCB AS A/V PCB AS CUSHION MIRROR S DETECT SW AS CONNECTION PCB CONNECTION PCB BRKT SCREEN B SCREW MACHIINE LCD ENGINE AS HOLDER AC CORD BUSHING FAN MIRROR CUSHION SOUND B CUSHION SOUND T CUSHION SOUND L CUSHION SOUND R RUBBER BUSHING SCREW TAPTITE CLAMP CORD HANDLE CABINET CUSHION DUST SCREW WOOD SCREW TAPTITE DUCT IN B DUCT IN T FILTER DUST DOOR FILTER SCREW TAPTITE BRKT CLAMP A SCREW TAPTITE BRKT SCREEN R BRKT SCREEN L SCREW TAPTITE BRKT SCREEN T DOOR SLIDE SUPPORT CONNECTION SCREW MACHINE DUCT ENGINE INLET BUSHING TERMINAL BUSHING LVDS SCREW MACHINE FRAME DOOR SLIDE SCREW MACHINE COVER ENGINE F CLAMP BALLAST FRAME BALLAST SCREW TAPTITE SHI CASE BALLAST SCREW MACHINE COVER BALLAST CASE ENGINE SCREW TAPTITE DUCT OUT R DUCT OUT L SCREW MACHINE COVER ENGINE T CUSHION P-LENS CUSHION MIRROR B CUSHION MIRROR T SCREW TAPTITE COVER BACK SCREW TAPTITE MESH STEEL SCREW WOOD COVER REAR DECO TERM SCREW TAPTITE TERMINAL ANT FRAME MAIN PCB SCREW TAPTITE HOLDER PCB SCREW TAPTITE BRKT MIRROR T SCREW TAPTITE BRKT MIRROR R SCREW TAPTITE BRKT MIRROR L SCREW TAPTITE BRKT MIRROR B SCREW WOOD BRKT WOOD C SCREW WOOD BRKT WOOD S DECO PANEL AV SCREW WOOD PANEL AV CABINET WOOD SCREW WOOD PANEL FRONT DOOR LAMP SPRING BUTTON POWER DECO CONTROL SCREW TAPTITE HOLDER CONTROL SCREW TAPTITE DECO LED POWER DECO LED SCREW TAPTITE PANEL CONTROL FRAME NET CLOTH BLACK SCREEN MASK FRONT R CLOTH BLACK MASK FRONT B SCREW TAPTITE BRKT CLAMP B MASK FRONT L MASK FRONT T PART NAME
CHECKED BY INSPECTED BY APPROVED BY
0.7T 10X125 3 TRS 4X24 MFZN BK 4 ADDA AD0512ME-D70 1 ------------1 8 INOAC F-9L T=10 1 1 1 SPONGE 10T 1 CR 2 1 40X50 1 40X14 1 AL6063 1 M4 PAN 4X12 MFZN 7 DEK-1 1 NYLON66 UL/CSA 1 CR 1 T=5 1 SPONGE 10T 2 SPONGE 10T 2 SPONGE 10T 1 SPONGE 10T 1 CR 12 1 TT2 TRS MFZN 4X14 BK NYLON 66 BLK 5280N 1 HIPS BK 2 SPONGE T=40 1 4X14 MFZN BK 4 TT2 WAS MFZN 3X12 BK 8 HIPS BK 1 HIPS BK 1 FOMEX 80PPI 1 HIPS BK 1 18 TT2 BIN MFZN 3X10 ZINC AL 2 10 TT2 BIN MFZN 3X10 ZINC AL 6063 1 AL 6063 1 8 TT2 BIN MFZN 3X10 ZINC AL 6063 1 PC ABS 1 NYLON 2 4 M-WAS 3X10 MFZN 1 1 2 6 1 4 1 1 1 4 1 6 1 1 6 1 1 2 1 1 2 4 17 1 7 1 6 1 1 9 1 1 3 1 6 1 2 1 2 1 4 1 8 2 6 2 1 3 1 1 5 1 1 1 1 1 4 1 1 1 2 3 1 2 4 1 1 8 1 16 2 1 1 Q'TY FR HIPS BK CR CR M-WAS 3X10 MFZN PC ABS M-WAS 3X10 MFZN FR HIPS BK SECC T=1.6 HIPS BK TT2 BIN MFZN 3X10 ZINC SECC T=1 M-WAS 3X10 MFZN HIPS BK SECC T=1.6 TT2 WAS MFZN 3X12 BK HIPS BK HIPS BK M-WAS 3X10 MFZN SECC T=1.6 PVC T=1 + SPONGE T=15 CR CR TT2 TRS MFZN 4X14 BK HIPS BK TT2 TRS MFZN 4X14 BK SECC T=0.8 4X20 WAS MFZN BK HIPS BK PVC T=0.25 TT2 TRS 4X14 MFZN BK HIPS BK FR HIPS BK TT2 BIN MFZN 3X10 ZINC FR HIPS BK TT2 TRS MFZN 4X14 BK SECC T=1.6 TT2 TRS MFZN 4X14 BK HIPS BK TT2 TRS MFZN 4X14 BK HIPS BK TT2 TRS MFZN 4X14 BK SECC T=1.6 4X20 WAS MFZN BK FR HIPS BK 4X20 WAS MFZN BK SECC T=1.6 PVC T=0.25 4X14 MFZN BK HIPS BK MDF T=15 4X20 WAS MFZN BK HIPS BK HIPS BK SWPA PIE0.5 ABS BK ACRYLE T=3 TT2 WAS MFZN 3X12 BK HIPS BK TT2 BIN MFZN 3X10 ZINC PMMA PMMA TT2 TRS MFZN 4X14 BK HIPS WH-081A HIPS BK + JERSEY T=0.5 20X300 AL 6063 T=0.5 20X300 AL 6063 TT2 BIN 3X10 AL AL 6063 AL 6063 MATERIAL REMARKS
PAGE OF DRAWING
1
21
2
124
125
127 126 130 3 4 123 5 7 8 6 6 9 10 11 12 129 127
128
133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 No.
4957800600 4856815400 4956801000 4858213800 4958002102 4958200602 4958102100 4958101100 4958002101 4958002100 4955600200 4957800600 4954800600 4957204000 PART CODE
CLOTH BLACK CLAMP WIRE CLAMP WIRE BAG INSTRUCTION BOX BOTTOM BAG P.E PAD PAD BOX UPPER BOX CARTON MARK BRAND DETECT SW AS CLOTH BLACK SPEAKER BUTTON COTROL SHIELD DOOR PART NAME
1 2 2 1 2 2 1 2 1 1 1 2 4 8 1 Q'TY
0.7T 40X120 NYLON 6/6 NYLON 6/6 L.D.P.E T0.05X250X400 DW-4 FOAM T0.5X1900X1550 E.P.S E.P.S DW-4 DW-4 AL T=1.0 DIA-CUTTING 0.7T 40X120 ABS (AL) SPONGE 8T 10X115 MATERIAL
PART NAME
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EXPLODED VIEW
DSJ-6000LN
D / T
1 OF 1
DIGITAL TV RESEARCH CENTER
DAEWOO ELECTRONICS CO., LTD.
MODEL NAME REFERENCE
49500026
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