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Service Manual
Color Television
CHASSIS : CN-220A
Model : DTQ-20J5FC
Specification
Model
Items
TV Standard
Power Input
Power Consumption
Tuning System
Tuning Ranges
Sound Output
Speaker
Antenna Input Impedance
Intermediate Frequencies
Remote Control
Special Function
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr
S/M No. : CN220A-010
DTQ-20J5FC
NTSC-M
AC120V, 60Hz
20=65W
Frequency Synthesizer(FS)Tuning System
VHF : 2 - 13(12)
UHF : 14 - 69(56)
CATV : 1-125(125)
1.3W+1.3W
3W 8 ohm
75 ohm Unbalanced
Picture IF Carrier Frequency : 45.75MHz
Sound IF Carrier Frequency : 41.25MHz
Color Sub-Carrier Frequency : 42.17MHz
R-38T01
3-Language OSD
With CAPTION
Wake-up On/Off Time
Sleep Timer
Power Restore
Nov. 2000
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Related Manuals for DAEWOO ELECTRONICS DTQ-20J5FC
Summary of Contents for DAEWOO ELECTRONICS DTQ-20J5FC
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Page 1: Service Manual
S/M No. : CN220A-010 Service Manual Color Television CHASSIS : CN-220A Model : DTQ-20J5FC Specification Model DTQ-20J5FC Items TV Standard NTSC-M Power Input AC120V, 60Hz Power Consumption 20=65W Tuning System Frequency Synthesizer(FS)Tuning System VHF : 2 - 13(12) Tuning Ranges... -
Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY PRECAUTIONS ........................2 PRODUCT SAFTY SERVICING GUIDELINES FOR AUDIO - VIDEO PRODUCS......... 2 PRODUCT SAFTY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS ......3 SPECIFICATIONS ..........................5 BLOCK DIAGRAM ..........................6 ALIGNMENT INSTRUCTIONS ......................7 SERVICE MODE ADJUSTMENTS ........................7 ASSEMBLY ADJUSTMENTS .......................... -
Page 3: Product Safty Servicing Guidelines For Audio - Video Producs
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO - VIDEO PRODUCTS CAUTION SUBJECT : X-RADIATION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC- TURER'S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID 1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSON- THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANT RESULT- NEL COVER THE SUBJECT OF X-RADIATION. -
Page 4: Product Safty Servicing Guidelines For Color Television Receivers
PRODUCT SAFETY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS CAUTION : Do not attempt to modify this product in any way. Unau- GRAPHIC SYMBOLS : thorized modifications will not only void the warranty, but may lead to your being liable for any resulting property damage or user injury. The lightning flash with arrowhead symbol, Service work should be performed only after you are thoroughly within an equilateral triangle, is intended to alert... - Page 5 SUBJECT : IMPLOSION 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 1. All direct viewed picture tubes are equipped with an integral implo- sion protection system, but care should be taken to avoid damage feet(or the equivalent thickness in spacers) to provide adequate during installation.
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Page 6: Specifications
SPECIFICATIONS MODEL DTQ-20J5FC REMARKS ITEMS TV STANDARD NTSC-M POWER INPUT AC 120V 60 Hz POWER CONSUMPTION 20 = 65W TUNING SYSTEM Frequency Synthesizer ( FS ) Tuning System VHF : 2 ~ 13 (12) TUNING RANGES UHF : 14 ~ 69 (56) -
Page 7: Block Diagram
BLOCK DIAGRAM... -
Page 8: Alignment Instructions
ALIGNMENT INSTRUCTIONS 1. SERVICE MODE ADJUSTMENTS Follow the steps below whenever service adjustment is required. See Table- A and Table- B to determine if service adjustments are required. 1) How to enter the service mode using the user remote control. •... -
Page 9: Assembly Adjustments
ALIGNMENT INSTRUCTIONS Table-B DATA MODE ADJUSTMENT ITEMS REMARKS INITIAL RANGE Screen Adjustment Auto RF AGC Video Level (VIDEOL) 0 ~ 7 Must be set to 7 RF AGC Delay (RFAGCD) 0 ~ 63 Align RF AGC threshold FM Level (FM.LEV) 0 ~ 31 Must be set to 20 AGC Point... - Page 10 ALIGNMENT INSTRUCTIONS 2) FOCUS ADJUSTMENT • Turn in a local station and adjust the Focus Control knob (located on FBT) for best picture details at high light condition. 3) RF AGC DELAY ADJUSTMENT (S5) • Receive a good local channel. •...
- Page 11 ALIGNMENT INSTRUCTIONS 4-3. Vertical Size Adjustment • Select “ V.SIZE” item, adjust “ V.SIZE” data value to proper vertical size as follows. 5) WHITE BALANCE ADJUSTMENT(S8) • Receive a good local channel. • Enter the service mode and select service adjustment S8. •...
- Page 12 ALIGNMENT INSTRUCTIONS • Select Subbrightness item, adjust Subbrightness data value to obtain normal brightness level. • Press the DISPLAY button to memorize the data. CONTRAST • Fixed value = 10 TINT • Fixed value = 27 COLOR • Fixed value = 15 7) FACTORY OUTGOING MODE (S12 : FACT) •...
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Page 13: Electrical Parts List
PRAT NAME DESCRIPTION REMARK ZZ100 48B4025Z11 TRANSMITTER REMOCON R-25Z11 I101 1DCT814B-- IC CHROMA DCT814B ZZ110 PTACPWJ702 ACCESSORY AS 9851833100 DTQ-20J5FC I301 PTC2SW4607 HEAT SINK ASS‘ Y 1LA7841--- + 7174300811 4850Q00910 BATTERY R03/NN I301 1LA7841--- IC VERTICAL LA7841 ZZ120 PTBCSHJ702 COVER BACK AS... - Page 14 ELECTRICAL PARTS LIST PART CODE PRAT NAME DESCRIPTION REMARK PART CODE PRAT NAME DESCRIPTION REMARK CC153 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 RC165 HRFT472JCA R CHIP 1/10 4.7K OHM J 2012 CC154 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 RC351 HRFT682JCA R CHIP...
- Page 15 R CHIP 1/10 2.4K OHM J 2012 RC699 HRFT102JCA R CHIP 1/10 1K OHM J 2012 ZZ200 PTMPJ0J702 PCB MAIN (RHU) AS 9850174600 DTQ-20J5FC RC703 HRFT101JCA R CHIP 1/10 100 OHM J 2012 C105 CEXF1C471V C ELECTRO 16V RSS 470MF (10X12.5)TP...
- Page 16 5XEX3R579C CRYSTAL QUARTZ HC-49U 3.579545M (TP) C704 CEXF1H229V C ELECTRO 50V RSS 2.2MF (5X11) TP ZZ200 PTMPJAJ702 PCB MAIN AXIAL AS 9850174600 DTQ-20J5FC C705 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP 2TM14006LB TAPE MASKING 3M #232 6.0X2000M C706 CEXF1C101V C ELECTRO 16V RSS 100MF (6.3X11) TP...
- Page 17 ELECTRICAL PARTS LIST PART CODE PRAT NAME DESCRIPTION REMARK PART CODE PRAT NAME DESCRIPTION REMARK D501 D1N4148--- DIODE 1N4148 (TAPPING) J044 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING D502 D1N4148--- DIODE 1N4148 (TAPPING) J045 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING D503 DUZ9R1BM-- DIODE ZENER...
- Page 18 ELECTRICAL PARTS LIST PART CODE PRAT NAME DESCRIPTION REMARK PART CODE PRAT NAME DESCRIPTION REMARK L533 5CPZ150K02 COIL PEAKING 15UH K (AXIAL 3.5MM) R701 RD-4Z240J- R CARBON FILM 1/4 24 OHM J L701 5CPZ220K02 COIL PEAKING 22UH K (AXIAL 3.5MM) R703 RD-4Z102J- R CARBON FILM...
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Page 19: Exploded View
EXPLODED VIEW 1. DTQ-20J5FC... - Page 20 SCHEMATIC DIAGRAM...
- Page 21 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : "DAEWOOELEC" E-mail :djkoo@web.dwe.co.kr TEL : 82-2-360-7806 FAX : 82-2-360-7877...
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Page 22: Ic Description
APPENDIX IC DESCRIPTION U-COM(I701) TV ONLY (H) POWER ON(H) CABLE (H) ST / MONO AUDIO MUTE(H) P13/PWM1 AKB WHITE BLUE BACK P14/PWM2 SOUND RESET H.OUT P15/PWM3 ON(L)/OFF(H) AUTO TINT POWER ON P17/PWM ST-BY(H) P73/INT3/TOIN REMOCON IN P72/INT2/TOIN P71/INT1 P70/INT0 KEY IN P84/AN4 P63/SCLK1 T-CLOCK... - Page 23 IC DESCRIPTION 1. Abstract. This specification is 1-Tuner Mono Model for North/South America, CCD 1-Chip MICOM LC863228A. It is developing software specification for tuning only NTSC and 3 system TV F/S. * 3 System : NTSC-M, PAL-M, PAL-N. 2. H/W Outline. 1) ROM : 28,672 x 8bits.tsc : 15,872 x 8 bits for CGROM.
- Page 24 IC DESCRIPTION 3) On Screen Displays function is interior designed. 4) Package. : 42 PIN SDIP. 5) Tuner (Pre-scaler.) C Bus. /PLL IC : TAU 6014-S(SIEMENS). 6) Remocon. : The IC of Transmission (MITSUBISHI M50560) C Bus) ◊ Apply one byte Read/Write mode. 7) E PROM.
- Page 25 IC DESCRIPTION - Auto Power On Function.(Power Restore function in the Special Menu) - Heat Run Function. --- OSD White Back-Ground - Sleep Timer. - Wake Up Time Function. - Off Time Function. - Remote Reception & Control. - Auto Tint. - Power Restore.
- Page 26 IC DESCRIPTION 6. Pin Description...
- Page 27 IC DESCRIPTION...
- Page 28 IC DESCRIPTION...
- Page 29 IC DESCRIPTION I101 DCT814(LA76814) : IC VIDEO PROCESSOR AUDIO OUT SIF INPUT FM OUTPUT SIF APC FILTER PIF AGC SIF OUTPUT RF AGC OUT EXT. AUDIO INPUT PIF INPUT1 VCO FILTER PIF INPUT2 VCO COIL1 IF GND VCO COIL2 IF VCC APC FILTER FM FILTER VIDEO OUTPUT...
- Page 30 IC DESCRIPTION I801 POWER CONTROL MODULE DPM 001 TI PIN NO DESCRIPTION PIN NO DESCRIPTION GATE DRIVE1 +12V INPUT POWER CONTROL SOURCE GND1 GND2 GATE +133V INPUT GATE DRIVE2...
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Page 31: No Power
TROUBLESHOOTING GUIDE 1. NO POWER FROM FBT 10V Check R416 Check F801(125V 4A) D801 D801(PBS208GU) RLY01 F801 R801 PCW1 L801 Check R801(7W 2.2) TO I101 #34 T801 C819 Check D807 Voltage 133V C804 R814 Check 133V C814 waveform C820 R809 L802 TUNER D808... -
Page 32: No Picture
TROUBLESHOOTING GUIDE 2. NO PICTURE NG : GO to the figure c Check the waveform of I101 #46 OK : Go the figure d Check the voltages U102 SF101 IF OUT TUNER SAW FILTER T-DATA T-CLOCK Check clock/data signal Check #29 #30 IF AGC voltage I701... -
Page 33: No Sound
TROUBLESHOOTING GUIDE 3. NO SOUND NG : Go to the figure e Check audio output signal of I101 #1 OK : Go to the figure f U102 SF101 IF OUT TUNER SAW FILTER T-DATA T-CLOCK Check #29 #30 IF AGC voltage Check I701 SIF output signal... -
Page 34: Ch Don' T Stop
TROUBLESHOOTING GUIDE 4. CH DON’ T STOP NG : Loss of signal or weak signal Check the input signal conditions OK : Go to the figure g Check 5V/33V LINE U102 SF101 IF OUT TUNER SAW FILTER T-DATA T-CLOCK AGC IN C103 #29 #30 RF AGC OUTPUT... -
Page 35: No Color
TROUBLESHOOTING GUIDE 5. NO COLOR Check Check C.V.S waveform the voltage composite video in Video/Chroma/Deflection Vcc Check the crystal Check the voltage X502 I101 RGB Vcc (9V) R OUT G OUT B OUT Check R/G/B signal 6. NO VERTICAL DEFLECTION Check the voltage Check... -
Page 36: No On-Screen Disply
TROUBLESHOOTING GUIDE 7. NO ON-SCREEN DISPLAY Check the signal (60Hz) V.SYNC IN Check I701 clock/data signal H.SYNC IN MICOM I101 OSD R Check OSD G the signal (15,734Hz) OSD B BLANK #11 #12 XC701 32.768KHz Check ST-BY OSD R/G/B/BLANK signal Check the crystal If OSD does not operate,...