Daewoo DTU-29M5ME Service Manual
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Daewoo DTU-29M5ME Service Manual

Daewoo DTU-29M5ME Service Manual

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Service Manual

Color Television
CHASSIS :
Model :
DTU-29M5ME/MP/MT/MZ
DTU-29M6ME/MP/MT/MZ
DTU-29M7ME/MP/MT/MZ
DTU-29U1ME/MP/MT/MZ
DTU-29U5ME/MP/MT/MZ
DTU-29U8ME/MP/MT/MZ
DTU-29F1ME/MP/MT/MZ
DTU-29F2ME/MP/MT/MZ
DTU-29F3ME/MP/MT/MZ
MODEL OPTION LIST
MODEL
ME
MP
MT
MZ
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.
S/G No.:TCM500FEF0
CM-500/500F
TEXT
PIP
O
O
X
O
O
X
X
X
JULY. 2005

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  • Page 1: Service Manual

    S/G No.:TCM500FEF0 Service Manual Color Television CHASSIS : CM-500/500F Model : DTU-29M5ME/MP/MT/MZ DTU-29M6ME/MP/MT/MZ DTU-29M7ME/MP/MT/MZ DTU-29U1ME/MP/MT/MZ DTU-29U5ME/MP/MT/MZ DTU-29U8ME/MP/MT/MZ DTU-29F1ME/MP/MT/MZ DTU-29F2ME/MP/MT/MZ DTU-29F3ME/MP/MT/MZ MODEL OPTION LIST MODEL TEXT 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.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. SPECIFICATIONS 2. SAFETY INSTRUCTION 3. CIRCUIT BLOCK DIAGRAM 4. ALIGNMENT INSTRUCTIONS 5. CM-500/F TYPICAL SERVICE DATA 6. ELECTRICAL PARTS LIST 7. EACH MODEL PARTS LIST 8. SCHEMATIC DIAGRAM 9. PRINTED CIRCUIT BOARD 10. MECHANICAL EXPLODED VIEW AND PARTS LIST APPENDIX(Appendix is provide only by internet[http://svc.dwe.co.kr]) 11.

  • Page 3: Specifications

    1. SPECIFICATIONS Items Model DTU-29M5ME/MP/MT/MZ DTU-29M6ME/MP/MT/MZ DTU-29M7ME/MP/MT/MZ DTU-29U1ME/MP/MT/MZ DTU-29U5ME/MP/MT/MZ DTU-29U8ME/MP/MT/MZ DTU-29F1ME/MP/MT/MZ DTU-29F2ME/MP/MT/MZ DTU-29F3ME/MP/MT/MZ TV Standard Color system PAL/SECAM, NTSC-4.43(AV) Sound system B/G, D/K, I, H Rated Voltage AC 110-250V, 50/60Hz Power consumption 73W(FLAT:110W) Sound Output Power 7W+7W (FLAT:7.5W + 7.5W at EQUILIZER CENTER) Channel Conerage BAND I : CH 02 ~ CH04(48.25MHz ~ 62.25MHz)

  • Page 4: Safety Instruction

    2 SAFETY INSTRUCTION 2 SAFETY INSTRUCTION NOTE : BEFORE SERVICING THIS CHASSIS READ THE “X-RAY RADIATION PRECAUTIONS”, “SAFETY PRECAUTIONS” AND “PRODUCT SAFETY NOTICE” BELOW. X-RAY RADIATION PRECAUTION 1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not exceed the specified limit. The nominal value of the high voltage of this receiver is 25.6KV [Normal Type](27.9KV [Flat Type]) at max beam current.

  • Page 5: Circuit Block Diagram

    3.CIRCUIT BLOCK DIAGRAM...

  • Page 6: Alignment Instructions

    4. ALIGNMENT INSTRUCTIONS DOCUMENT HISTORY VERSION DATE COMMENTS V0.00 26/10/04 Document imported from project Cp520(Author J.D.Santos) V1.00 12/11/04 Major revision after visit in Gunpo RND V1.01 25/11/04 Tuner option revision(Byte1, bite2,1,0) V1.02 29/11/04 Curtain beep option added(Byte3, bits1) Curtain ON/OFF bit setting corrected V1.03 02/12/04 Local key option bit changed.
  • Page 7 ALIGNMENT INSTRUCTIONS 4.1MICROCONTROLLER CONFIGURATION : SERVICE MODE To switch the TV set into service mode please see instruction below. 1 - Select PR. number 91 2 - Adjust sharpness to minimum and exit all menus. 3 - Within 2 seconds press the key sequence : RED - GREEN - menu The software version is displayed beside the word Service, e.g.
  • Page 8 Koran AV out: remote functions logo monitor control disabled enabled Fixed to Local key option (see table below) ‘0’ Digital Koran Daewoo AV out: functions Remote Tuner enabled enabled control 4.3.3 OPTION3 Beep at Chassis curtain Curtain with E/W Full...
  • Page 9 ALIGNMENT INSTRUCTIONS 4.4 USER GUIDE 4.4.1 ENTERING FACTORY MODE To switch the TV set into FACTORY mode, use the factory remote control, and press on “SVC”. The factory menu will appear on the screen, showing “FACTORY Vx,xx”(where x.xx is the software version).
  • Page 10 ALIGNMENT INSTRUCTIONS 4.5 CONTROL DESCRIPTION 4.5.1 OPTION 1 BITS - TOP Teletext(Bit 7) Enables/disables the TV from displaying TOP row 24 link titles, and the dedicated TOP menu table. A FLOF (if available) or SIMPLE / PAGETRACE presentation will be used. - FLOF/Fastext (Bit 6) Enables/disables the TV from displaying FLOF row 24 link titles.
  • Page 11 4.5.2 OPTION 2 BITS - Remote control(Bit 7) This is not intended to be changed by use of the FACTORY remote control. - NEC/Daewoo Remocon(Bit 6) User remote control configuration, the choise being between the following; - NEC remocon(‘1’) - Daewoo R-49C07(‘0’) The R-30SVC7 “FACTORY”...
  • Page 12 ALIGNMENT INSTRUCTIONS - Teletext language option(Bit 6, 5&4) Bit6, 5&4 Latin West Latin East Russia Persia Arabic Not used Not used Teletext National Option table for each language option: Teletext table C12 C13 C14 Basic Char.Set Twist Char.Set Latin West Latin Latin English...
  • Page 13 ALIGNMENT INSTRUCTIONS 4.5.4 TV SET ALIGNMENT (1) G2 ALIGNMENT - Tune a colour bar pattern. - Fine the “G2-SCREEN” item in service mode. - Adjust screen volume(on FBT) to make the horizontal line just before disappeared. (2) WHITE BALANCE - Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature. - Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature.
  • Page 14 ALIGNMENT INSTRUCTIONS HOR WIDTH adjust for 90% overscan. PARABOLA CORNER B & CORNER T EW TRAPEZ 3.7.7 AGC - Make sure option bits are correct for the tuner fitted on the chassis (See above how to change option bits). - Adjust the antenna signal level at 62 dB V± 2 - Tune a colour bar pattern.

  • Page 15: Remote Control

    ALIGNMENT INSTRUCTIONS Remote control TELETEXT MODE TV MODE POWER POWER SOUND MUTE SOUND MUTE NUMBER 0..9 NUMBER 0..9 TV / AV NORMAL RECALL VOL/BRIGHT MENU SELECTION MENU PAGE UP PROGRAM UP (CURSOR UP) VOL / BRIGHT DOWN VOLUME DOWN (CURSOR LEFT) VOL / BRIGHT UP VOLUME UP (CURSOR RIGHT) PAGE DOWN...

  • Page 16: Cm-500/F Typical Service Data

    5. CM-500/F TYPICAL SERVICE DATA -15-...

  • Page 17: Electrical Parts List

    DESCRIPTION REMARK ZZ100 48B5849C07 TRANSMITTER REMOCON R-49C07 (AAA) I601 PTA2SW8232 HEAT SINK ASS`Y 1LA42152-E + 7174301011 ZZ110 PTACPWE135 ACCESSORY AS DTU-29M5ME 11LA42152-EIC AUDIO AMP LA42152-E 4850Q00910 BATTERY R03/NN 0000A 4857028232 HEAT SINK AL EX BK 48586054K1 MANUAL INSTRUCTION DTM-2082CW 0000B...
  • Page 18 RS02Z104JS R M-OXIDE FILM 2W 100K OHM J SMALL E022 4856310600 EYE LET BSR T0.2 (R2.3) ZZ200 PTMPJRE135 PCB MAIN RADIAL AS DTU-29M5ME E023 4856310600 EYE LET BSR T0.2 (R2.3) C102 CEXF1C100V C ELECTRO RSS 16V 10MF 4X7 E024 4856310600 EYE LET BSR T0.2 (R2.3)
  • Page 19 THVH472GCA D602 D1N4148—- DIODE 1N4148 (TAPPING) SW706 5S50101090 SW TACT THVH472GCA D701 DUZ3R9B—- DIODE ZENER UZ-3.9B ZZ200 PTMPJAE135 PCB MAIN AXIAL AS DTU-29M5ME D702 D1N4148—- DIODE 1N4148 (TAPPING) 2TM14006LB TAPE MASKING 3M #232 6.0X2000M D703 D1N4148—- DIODE 1N4148 (TAPPING) -18-...
  • Page 20 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK D704 DUZ3R9B—- DIODE ZENER UZ-3.9B J320 RD-AZ102J- R CARBON FILM 1/6 1K OHM J D710 D1N4148—- DIODE 1N4148 (TAPPING) J321 85801060GY WIRE COPPER 1/0.6 TIN COATING D750 DUZ9R1BM—...
  • Page 21 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK J747 85801060GY WIRE COPPER 1/0.6 TIN COATING J857 85801060GY WIRE COPPER 1/0.6 TIN COATING J748 85801060GY WIRE COPPER 1/0.6 TIN COATING J879 85801060GY WIRE COPPER 1/0.6 TIN COATING J749 85801060GY...
  • Page 22 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK R102 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R740 85801060GY WIRE COPPER 1/0.6 TIN COATING R103 RD-AZ100J- R CARBON FILM 1/6 10 OHM J R741 RD-AZ101J- R CARBON FILM...
  • Page 23 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK RV11 RD-AZ470J- R CARBON FILM 1/6 47 OHM J LP06 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) RV12 RD-AZ682J- R CARBON FILM 1/6 6.8K OHM J RP01 RD-AZ101J- R CARBON FILM...
  • Page 24 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK JS02 85801060GY WIRE COPPER 1/0.6 TIN COATING JS03 85801060GY WIRE COPPER 1/0.6 TIN COATING LA01 5CPZ100K04 COIL PEAKING 10UH 10.5MM K (LAL04TB) LA02 5CPZ100K04 COIL PEAKING 10UH 10.5MM K (LAL04TB) R901 RD-AZ101J- R CARBON FILM 1/6 100 OHM J...

  • Page 25: Each Model Parts List

    7. EACH MODEL PARTS LIST PART NAME NORMAL FLAT A001 PCB MAIN 4859810993 4859811493 C313 C MYLAR 100V 0.047MF J (TP) 100V 0.056MF J (TP) C314 C MYLAR 100V 0.047MF J (TP) 100V 0.056MF J (TP) C405 C MYLAR 1.6KV BUP 0.01MF J 1.6KV BUP 7500PF J C406 C MYLAR...

  • Page 26: Schematic Diagram

    -25-...

  • Page 27: Printed Circuit Board

    -26-...
  • Page 28 -27-...
  • Page 29 -28-...

  • Page 30: Mechanical Exploded View And Parts List

    DTU-29M5 -29-...
  • Page 31 DTU-29M6 -30-...
  • Page 32 DTU-29M7 -31-...
  • Page 33 DTU-29U1 -32-...
  • Page 34 PART NAME MATERIAL REMARKS PART CODE Q ty Designed by Checked by Inspected by Approved by PART NAME UNITS DEVELOPMENT DWG SCALE 01.09.26 DTU-29U5 MODEL DAEWOO Electronics Corp. 485009KU Mechani c al Desi g n Team, TV Research Center REFERENCE -33-...
  • Page 35 DTU-29U8 4859645360 CM-500F 4858311110 12W 8¥Ø SP-58126F DTU-29U8 -34-...
  • Page 36 DTU-29F1 CM-500F 4859845360 CPT A68AKY13X CM-500F DTU-29F1 CM-500F -35-...
  • Page 37 DTU-29F2 CM-500F 4859845360 CPT A68AKY13X DTU-29F2 CM-500F -36-...
  • Page 38 DTU-29F3 CM-500F CM-500F 4859845360 CPT A68AKY13X DTU-29F3 CM-500F -37-...

  • Page 39: Ic Description

    11. IC DESCRIPTION 1. UOC III IC DESCRIPTION 1.1 UOC III Series The UOC III series combines the functions of a Video Signal Processor (VSP) together with a FLASH embedded TEXT/Control/Graphics m-Controller (TCG m-Controller) and US Closed Caption decoder. In addition the following functions can be added: - Teletext decoder with 10 page text memory - Multi-standard stereo decoder - BTSC stereo decoder...
  • Page 40 IC DESCRIPTION -39-...
  • Page 41 IC DESCRIPTION 1.3 PINNING QFP 90pin Symbol Short Description VSSC Ground INT0/P0.5 “external interrupt 0 or port 0.5(4mA current sinkingcapability for direct drive of LEDs)” VDDC digital supply to core(1.8V) P1.0/INT1 port 1.0 or external interrupt 1 P1.1/T0 port 1.1 or Counter/Timer 0 input P1.3/T1 port 1.3 or Counter/Timer 1 input P1.6/SCL...
  • Page 42 IC DESCRIPTION QFP 90pin Symbol Short Description SIFIN2/DVBIN2(2) SIF input 2/ DVB input 2 AGCOUT tuner AGC output “QSSO/AMOUT/AUDEEM(2)” “QSS intercarrier output/ AM output/ deemphasis(front-end audio out)” AUDOUTSL audio output for SCART/CINCH(left signal) AUDOUTSR audio output for SCART/CINCH(right signal) GND2 ground 2 for TV processor PLLIF IF-PLL loop filter...
  • Page 43 IC DESCRIPTION QFP 90pin Symbol Short Description YOUT Y-output (for YUV interface) INSSW3 3rd RGB/ YPBPR insertion input R/PRIN3 3rd R input / PR input G/YIN3 3rd G input / Y input B/PBIN3 3rd B input / PB input scan velocity modulation output FBISO/CSY “flyback input/sandcastle output or composite H/V timingoutput”...
  • Page 44 IC DESCRIPTION 1.4 FEATURES Analogue Video Processing (all versions) · Multi-standard vision IF circuit with alignment-free PLL demodulator · Internal (switchable) time-constant for the IF-AGC circuit · Switchable group delay correction and sound trap (with switchable centre frequency) for the demodulated CVBS signal ·...
  • Page 45 IC DESCRIPTION windows in parallel. · Linear and non-linear horizontal scaling of the video signal to be displayed. Sound Demodulation (all versions) · Separate SIF (Sound IF) input for single reference QSS (Quasi Split Sound) demodulation. · AM demodulator without extra reference circuit ·...
  • Page 46 IC DESCRIPTION · Five channel processing for Main Left and Right, Subwoofer, Centre and Surround. To exploit this feature an external DAC is required. Volume and tone control for loudspeakers (stereo versions with Audio DSP) · Automatic Volume Level (AVL) control ·...
  • Page 47 IC DESCRIPTION · PWM (6-bits) outputs for analogue control functions · Remote Control Pre-processor (RCP) · Universal Asynchronous Receiver Transmitter (UART) Data Capture · Text memory up to 10 pages · Inventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and Subtitle Page Table (SPT) ·...
  • Page 48 IC DESCRIPTION 2. LA42152 15W 2-CHANNEL AF POWER AMPLIFIER 2.1 Functions - Po 15W x 2ch(V = 16.5V, R = 8 , THD = 10%) - Built - in Standby function. - Built - in Mute function. - Full complement of built-in protection circuis (Portection from shorting to ground, shorting to Vcc, load shorting, and overheating.) 2.2 BLOCK DIAGRAM Standby...
  • Page 49 IC DESCRIPTION 3. TDA8358J VERTICAL AMPLIFIER The TDA8358J are power circuit for use in 90° and 110° colour deflection systems for field frequencies of 25 to 200Hz field frequencies, and for 4:3 and 16/9 picture tubes. The IC contains a vertical deflection output circuit, operating as a high efficiency class G system. The full bridge output circuit allows DC coupling of the deflection coil in combination with single positive supply voltages.
  • Page 50 IC DESCRIPTION 3.2 PINNING Symbol Description Positeve vertical input Negative vertical input Supply voltage OUTB Vertical output voltage B INEW East-west input voltage VGND Vertical ground EWGND East-west ground OUTEW East-west output voltage Flyback supply voltage OUTA Vertical output voltage A GUARD Guard output voltage FEEDB...
  • Page 51 IC DESCRIPTION 4 TDA6107AJF The TDA6107AJF includes three video output amplifiers and is intended to drive the three cathodes of a colour CRT directly. The device is contained in a plastic DIL-bent-SIL 9-pin medium power(DBS9MPF) package, and uses high-voltage DMOS technology. To obtain maximum performance, the amplifier should be used with black-current control.
  • Page 52 IC DESCRIPTION 4.3 Block diagram TDA6107AJF 5. 24WC16 - 16 KB EEPROM 5.1 Features : - 16 Kbit serial I2C bus EEPROM - 400KHz I2C Bus Compatible - supply voltage : 1.8 V to 6.0 V - Low Power CMOS Technology - 1 Million Erase/Write cycles (minimum) - 100 year data retention (minimum) 5.2 Pin description...
  • Page 53 IC DESCRIPTION 6 STR - W6756 6.1 GENERAL DESCRIPTION The STR-W6756 is an hybrid IC with a build-in MOSFET (Switching regulators) and control IC, designed for flyback converter type switch mode power supply applications. 6.2 FEATURES - Small SIP fully isolated moulded 6 pins package - Many protection functions : -- Pulse-by-pulse overcurrent protection (OCP) -- Overvoltage protection with latch mode (OVP)
  • Page 54 IC DESCRIPTION 6.4 PIN DESCRIPTION Terminal No. Symbols Descriptions Functions Drain terminal MOSFET drain S/GND Source/Ground terminal MOSFET Source/Ground Power supply Input of power supply for control circiut SS/OLP Delay at Overload/Soft Overload Protection and Soft Start set up Terminal Opetation Time set up Feedback terminal Constant Voltage Control Signal Input,...
  • Page 55 IC DESCRIPTION 6.5 CONTROL PART-ELECTRICAL CHARACTERISTICS Ratings Parameter Terminal Symbol Units Power Supply Start-up Operation Operation start voltage 4 - 3 Vcc(ON) 16.3 18.2 19.9 Operation stop voltage 4 - 3 Vcc(OFF) 10.6 Circuit current in operation 4 - 3 Icc(ON) Circuit current in non-operation 4 - 3...
  • Page 56 IC DESCRIPTION 7 FUNCTIONAL DESCRIPTION OF VIDEO PROCESSOR 7.1 Vision IF amplifier The vision IF amplifier can demodulate signals with positive and megative modulation. The PLL demodulator is completely alignment-free. The VCO of the PLL circuit is internal and the grequency is fixed to the required value by using the clock ftequency of the TCG u-Controller as a reference.
  • Page 57 IC DESCRIPTION applied to obtain sufficient selectivity (the sound input can be activated by means of the setting of CMB2-CMB0 bits in subaddress 4AH). The setting to the wanted frequency is realised by means of the control bits FMA, FMB and FMC in the control bit 33H. From the output status bytes it can be read whether the PL Lfrequency is inside or outside the window and whether thePLL is in lock or not.
  • Page 58 IC DESCRIPTION The Ics have 3 inputs for external CVBS signals. All CVBS inputs can be used as Y input for the insertion of Y/C signals.However, the CVBS(Y)2 input has to be combined with the C3 input. It is possible to add and extra CVBS(Y/C) input via the pins which are intended to be used for YUV interface (or RGB/YPrPb input).
  • Page 59 IC DESCRIPTION available on one of the other CVBS inputs.In this condition the connections between the vision IF amplifier and the synchronisation circuit can be switched on and off by means of the VDX bit. The VDXEN bit must be set to “1” for this mode. The vertical synchronisation is realised by means of a divider circuit.
  • Page 60 IC DESCRIPTION The circuit contains the following picture improvement features: > Peaking control circuit. The peaking function can be activated for all incoming CVBS, Y/C and RGB/YPrPb signals. Various parameters of the peaking circuit can be adapted by means of the I2C-bus. The main parameters are: - Peaking centre frequency (via the PF1/PF0 bits in subaddress 19H).
  • Page 61 IC DESCRIPTION The base-band delay line is integrated. In devices without CVBS comb filter this delay line is also active during NTSC to obtain a good suppression of cross colour effects. The demodulated colour difference signals are internally supplied to the delay line. The baseband comb filter can be switched off by means of the BPS bit (subaddress 3CH).
  • Page 62 IC DESCRIPTION 8 GENERAL DESCRIPTION OF THE TV SOUND OF SOUND PROCESSOR The TV Sound Processor is a digital TV sound processor for analog multi-channel sound systems in TV sets. It is based on a 24 bit DSP and designed to support several applications. A new easy-to-use control concept was implemented for easiest configuration programming of the very complex functionality of the TV Sound Processor.
  • Page 63 IC DESCRIPTION ANALOG 2-CARRIER SYSTEMS [Table] Frequency modulation [Table] Identification for A2 systems 2-CARRIERSYSTEMSWITHNICAM [Table] NICAM standards Note 1. See ‘EBU specification’ or equivalent specification. 9 FUNCTIONAL DESCRIPTION SOUND PROCESSOR 9.1 The UOC III TV Sound Concept The UOCIII sound concept is implemented over the video processor and TCG-microcontroller. Only relevant blocks, functions and signal flows for sound are given.
  • Page 64 IC DESCRIPTION The tuner receives a RF signal and converts it to IF. Via appropriate SAW filters the SIF signal is delivered to the QSS stage of the video processor and if channels according to standard L/L’ are received also to the AM demodulator. The Quasi Split Sound demodulation generates the SSIF or intercarrier signal.
  • Page 65 IC DESCRIPTION 9.2 Functional Overview Of the digital controller sound part The digital controller sound part consists of the SSIFADC, audio ADCs, DEMDEC HW, the sound DSP core, audio DACs and I2S interface hardware as shown in fig below. The DEMDEC part of the Sound DSP is used for the decoder and partly demodulator tasks.
  • Page 66 IC DESCRIPTION 9.3 Demodulator and decoder INTRODUCTION The TV sound processor provides an easy-to-use programming interface and built-in intelligence for the demodulator and decoder part. The sound demodulator is able to search for sound carriers and react to transmission mode changes autonomously, without interaction of the micro controller software.

  • Page 67: Number 0

    IC DESCRIPTION A matrix performs the de-matrixing of the A2 stereo, dual and mono signals to obtain the left (L) and right (R) or language A and B signals. FM PILOT CARRIER PRESENT DETECTOR The TV Sound Processor provides FM A2 standard pilot carrier detection. NICAM DEMODULATION The NICAM signal is transmitted via DQPSK modulation at a bit rate of 728kBit/s.
  • Page 68 IC DESCRIPTION NICAM AUTO-MUTE If the Auto Standard Detection (ASD) or the Static Standard Detection (SSS) feature is activated the following auto mute function is in effect. If NICAM B/G, I, D/K is received, the auto-mute is enabled and the signal quality becomes poor, the built-in control automatically switches the output signal (DEC output) to FM channel 1.

  • Page 69: Trouble Shooting Guide

    12. TROUBLE SHOOTING CHARTS 1. NO RASTER CHECK MAIN B+(130V/133V: Flat Model) ABNORMAL CHECK VOLTAGE CHECK HEATER VOLTAGE OF C850 VIDEO B+(189V) LINE 295VDC AT 230V NORMAL NORMAL ABNORMAL CHECK/REPLACE F801 ABNORMAL CHECK/REPLACE CHECK Horizontal I801 AT PIN 73 OF I701 (STR-W6756) NORMAL CHECK/REPLACE...
  • Page 70 TROUBLE SHOOTING CHARTS 2. NO PICTURE(RASTER OK) CHECK SIGNAL AT PIN 1 OF Z701 NORMAL ABNORMAL CHANGE INPUT MODE CHECK SIGNAL AT PIN RF --> AV --> RF 83, 84, 85 OF I701 NORMAL CHANGE SIGNAL CHECK VOLTAGE AT PIN IF OF TUNER 22,43,45,63,80 OF I701 ABNORMAL...
  • Page 71 TROUBLE SHOOTING CHARTS 3. NO COLOR ABNORMAL CHECK SIGNAL AT 28,29 PIN OF I701 NORMAL CHANGE THE SYSTEM CHECK/REPLACE PAL ---> SECAM IF OF TUNER NORMAL ABNORMAL CHECK/REPLACE CHECK R,G,B SIGNAL Z701, Z702 83,84,85TH OF I701 CHECK/REPLACE CRT PART -70-...
  • Page 72 TROUBLE SHOOTING CHARTS 4. NO PICTURE ABNORMAL NORMAL CHECK CHECK SIGNAL OUT AT 28,29 OF I701 R,G,B OF I701 ABNORMAL CHECK / REPLACE CHANGE INPUT MODE I701 RF --> AV --> RF CHECK CHECK SIGNAL AT CHECK/REPLACE NORMAL AV Signal IF OF TUNER SCL, SDA, B+ ABNORMAL...
  • Page 73 TROUBLE SHOOTING CHARTS 5. NO VERTICAL SCANNING(ONE HORIZONTAL LINE RASTER) CHECK DY CONNECTOR NORMAL ABNORMAL CHECK INPUT CHECK/REPLACE VOLTAGE OF I301 D410, D301 46V LINE, 16V LINE NORMAL ABNORMAL CHECK NORMAL CHECK VERTICAL INPUT 76,77 PIN OF I701 (Vin) OF I301 ABNORMAL ABNORMAL CHECK...
  • Page 74 TROUBLE SHOOTING CHARTS 6. NO MAN SOUND(RF) NORMAL CHECK SIGNAL AT PIN CHECK 8,9,11,12, OF I601 Speaker & Connector ABNORMAL NORMAL CHECK SIGNAL AT PIN Replade I601 2,4 OF I601 NORMAL ABNORMAL NORMAL CHECK SIGNAL AT PIN CHECK/REPLACE 57,58, I701 R602, R604, R605, R606, R606, C606...
  • Page 75 TROUBLE SHOOTING CHARTS 7. NO EXTERNAL AV(RF OK) CHECK CONNECTION OF AV1,AV2,DVD1,DVD2 NORMAL CHECK SIGNAL AT PIN ABNORMAL CHECK Signal of 49,52,55,68,69,70 OF I701 AV1,AV2,DVD1,DVD2 NORMAL ABNORMAL CHECK SIGNAL AT PIN CHECK / REPLACE R,G,B 83,84,85 OF I701 I701 NORMAL ABNORMAL CHECK SIGNAL AT CHECK/REPLACE...
  • Page 76 TROUBLE SHOOTING CHARTS 8. REMOTE CONTROL UNIT TROUBLE ABNORMAL REPLACE CHECK BATTERY AND BATTERY LED OF REMOCON NORMAL ABNORMAL REPLACE CHECK IR OF PREAMP PREAMP IC(IF01) AND VCC OF PREAMP IC(IF01) NORMAL CHECK / REPLACE 2’nd PIN OF I701 -75-...
  • Page 77 DAEWOO ELECTRONICS CORP. 686, AHYEON-DONG, MAPO-GU, SEOUL, KOREA. C.P.O. BOX 8003 SEOUL KOREA PRINTED DATE : JULY. 2005...

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