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Daewoo DSJ-6000LN Service Manual
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Daewoo DSJ-6000LN Service Manual

Daewoo DSJ-6000LN Service Manual

Lcd projection tv (hdtv monitor)
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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

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Summary of Contents for Daewoo DSJ-6000LN

  • Page 1: Service Manual

    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...
  • Page 2 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 - 1 -...

  • Page 3: Safety Precautions

    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.
  • Page 4 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.
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  • Page 7 KEY Button and Function KEY BUTTON FUNCTION Remote controller Green - TV in use Lamp Orange - VCR in use Red - CATV in use POWER Use turning on, turning off TV TV/VCR/CATV TV / Video / Cable Converter Use to select Use to select channel directly 0~9 channel directly 100 Button...
  • Page 8 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’...

  • Page 9: Service Mode

    4-2. SERVICE MODE To operate Service : Press the USER Remote controller in order starting with CH Up Mute RECALL Mute (You can operate in case INPUT is TV mode, or being input signal) Service Mode SVC MAIN (Initial Data of the Service mode) PW364 (Adjusting Brightness Contrast and White Balance of full input) AD9884...
  • Page 10 AD9884 (Adjusting Brightness Contrast of DTV/ PC input ) R Gain Fixing Value RED MIN G Gain Fixing Value RED MAX Reading velue B Gain Fixing Value GRN MIN automatirally CLP PL Fixing Value GRN MAX accorling to CLP DR Fixing Value BLU MIN adjustment state...
  • Page 11 TEMP Detecting the femperature in the inside of ENGINE Engine V-T compensation *Use Time : Total usage time of LCD panel *Factory Set (Operating Initalization) - 10 -...

  • Page 12: Power Supply

    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.
  • Page 13 1.Specification / Feature 1-1.Product Specification - 12 -...
  • Page 14 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.
  • Page 15 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.
  • Page 16 (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.
  • Page 17 (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.
  • Page 18 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).
  • Page 19 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.
  • Page 20 Partition NAME DESCRIPTION INPUT SOUND PROCESSOR Audio signal (the excepted HP L/R, MON L/R) Output L/R SPEAKER Output CENTER SPEAKER OUTPUT Output WOOFER SPEAKER SL/SR Output SURROUND L/R 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);...
  • Page 21 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.
  • Page 22 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.
  • Page 23 (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.
  • Page 24 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).
  • Page 25 - 24 -...
  • Page 26 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.
  • Page 27 (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).
  • Page 28 No “Power On” (Timer on/off and the main power lamp lighting in red) Check fixing state of air filter Check whether Sensor (DETECT S/W)is (Power On after removing air filter and wrong or not, and fix air filter correctly pressing Detect S/W by hand or tape) After checking Detect S/W is wrong or Check Fixing state of lamp Door side not, pull down and fix Door slide...
  • Page 29 No “Power On” (Timer on/off and the main power lamp flickering in red and orange alternately) Remove lamp and then fix it again Check normal operation Check output voltage of P804(POWER) Replace Power PCB (380V / 18V) Check voltage of pin 1 (Lamp_On) in Replace Main PCB P626C at Main PCB Check voltage of pin 3 (Error) in P626C...
  • Page 30 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) The voltage is mane Then DC 5V in a short Time, then it goes to 0V Check voltage of pin 7(7V/10V)
  • Page 31 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...
  • Page 32 No “Power on” (the main power lamp is red. stand-by Power is on) SPEC.3.3V, (if it is more than 1.5V:Normal Check P805M WAFER Power ON/OFF 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...
  • Page 33 No Display (DTV / PC Input) Does Power LED operate Lamp, Fan, normally in green? Abnormal Power When pressing Menu check LVDS of IC225E button, is OSD displayed? #2,3 #5,6 #8,9 #11,12 Check output of CLK in IC213 Check signal output of DTV of Is ‘No Signal’...
  • Page 34 No Display (RF / VIDEO / DVD) LAMP, FAN, Power abnormal Does Power LED operate normally in green? When pressing Menu button, is OSD CheckIC217 (PW364) output Check IC220 (LVDS IC) output displayed normally? (#DPT00~#DPT23) (#LVDS00~#LVDS09) Repair Engine BOARD RF signal is off RF, VIDEO Screen is off Only DVD Screen is off Check U101 (1855) output...
  • Page 35 No SOUND Check SOUND MUTE Check SPEAKER CONNECTOR Check each input CABLE Check input signal Check TU101 SIF input Check IC601 (#67) Signal External Input 1/2/3 Check U101 (#20,22) output Check IC601 (#47,48) Signal Check P610A (#10,11) path Check IC601 (#50,51) Signal HDTV Check P610A (#15,16) path Check IC602 (#50,51) Signal...
  • Page 36 Z86129 (caption/rating) -35-...
  • Page 37 PART CODE PART NAME Q’TY MATERIAL REMARKS DESIGNED BY CHECKED BY INSPECTED BY APPROVED BY UNITS PART NAME PAGE OF DRAWING EXPLODED VIEW 1 OF 1 SCALE DIGITAL TV RESEARCH CENTER MODEL DSJ-6000LN NAME 49500026 REFERENCE DAEWOO ELECTRONICS CO., LTD. -36-...
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