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Service Manual
Color Television
CHASSIS : CN-220B/C
Model : DTQ - 20D5FS / FSP
DTQ - 20D5FC
DTQ - 20D4AS / ASP
DTQ - 20D4SSF / SSSP
SPECIFICATIONS
MODEL
DTQ-20D5FS
ITEM
TV STANDARD
NTSC-M
POWER INPUT
120V 60HZ
POWER CONSUMPTION
84W
TUNING SYSTEM
Frequency Synthesizer (FS) Tuning System
VHF : 2 ~ 13 (12)
TUNING RANGES
UHF : 14 ~ 69 (56)
A~W, A- 5 ~ A-1, W + 1 ~ W + 84
SOUND OUTPUT
5W + 5W
SPEAKER
8 ohm 5W x 2EA
ANTENNA INPUT
75 ohm Unbalanced
IMPEDANCE
AUXILIARY INPUT
Front : Video, Audio, Earphone
TERMINAL
Rear: Video, Audio, (R,L)
Picture IF Carrier Frequency : 45.75 MHZ
INTERMEDIATE
Sound IF Carrier Frequency : 41.25 MHZ
FREQUENCIES
Color Sub-Carrer Frequency : 3.579545 MHZ
REMOTE CONTROL
R - 40
AV only PIP
ICON MENU TYPE
SPECIAL FUNCTIONS
STEREO / SAP
3 - Language OSD
with Caption
Caution :
In this Service 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(http://svc.dwe.co.kr)
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr
S/M No. : CN220NTEF0R1
DTQ-20D5FSP
20D5FC
120V 60HZ
220V 60HZ
OCT. 2001
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Summary of Contents for Daewoo DTQ-20D5FS
- Page 1 In this Service 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(http://svc.dwe.co.kr) DAEWOO ELECTRONICS CO., LTD OCT. 2001 http : //svc.dwe.co.kr...
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Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY INSTRUCTION ........................2 SPECIFICATIONS ..........................3 CIRCUIT BLOCK DIAGRAM ......................5 ALIGNMENT INSTRUCTION ......................6 Your Remote Control ........................6 Service Mode Adjustment ......................... 7 Assembly Adjustment ........................8 SCHEMATIC DIAGRAM ........................12 EXPLODED VIEW ..........................12 PRINTED CIRCUIT BOARD ...................... -
Page 3: Safety Instruction
SAFETY INSTRUCTION WARNING : Only competent service personnel may carry out work involving the testing or repair of this equipment 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 22-23 kV (14” ) or 24-26 kV (20”... -
Page 4: Specifications
SPECIFICATIONS CN-220B Chassis MODEL DTQ-20D5FSP DTQ-20D5FS DTQ-20D4SSSP DTQ-20D5FC ITEM TV STANDARD NTSC-M POWER INPUT 120V 60HZ 220V 60HZ 120V 60HZ 220V 60HZ POWER CONSUMPTION TUNING SYSTEM Frequency Synthesizer (FS) Tuning System VHF : 2 ~ 13 (12) TUNING RANGES UHF : 14 ~ 69 (56) - Page 5 SPECIFICATIONS CN-220C Chassis MODEL DTQ-20D4AS DTQ-20D4ASP DTQ-20D4ASP ITEM TV STANDARD NTST-M 120V 60HZ 220V 60HZ 90-260V 60HZ POWER INPUT POWER CONSUMPTION Frequency Synthesizer (FS) Tuning System TUNING SYSTEM VHF(L) : CH 2 ~ CH 6 UHF(H) : CH 7 ~ CH 13 : CH 14 ~ CH 69 CATV VHF(L) : 5A, A, B, A-5 - A-1...
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Page 6: Circuit Block Diagram
CIRCUIT BLOCK DIAGRAM... -
Page 7: Alignment Instruction
ALIGNMENT INSTRUCTIONS Your Remote Control 1. POWER Use this button to turn your TV on or off. 2. 0 - 9 Use these buttons to change channels. 3. MUTE Use to turn the TV’s sound on and off. POWER 4. DISPLAY Use this buttons to display the channel number and status. -
Page 8: Service Mode Adjustment
ALIGNMENT INSTRUCTIONS 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. · Turn the set on. ·... -
Page 9: Assembly Adjustment
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 14: Exploded View
EXPLODED VIEW... - Page 15 EXPLODED VIEW...
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Page 16: Printed Circuit Board
PRINTED CIRCUIT BOARD... -
Page 17: Service Parts List
REMARK PART NAME PART DESCRIPTION REMARK ZZ100 TRANSMITTER REMOCON R-40C03 10000 D807 DIODE RGP30J 10000 ZZ110 ACCESSORY AS DTQ-20D5FS 10000 F801 FUSE GLASS TUBE UL/CSA TL 4A 125V MF51 10000 BATTERY R03/NN 20000 I301 HEAT SINK ASS`Y 1LA7841--- + 7174300811... - Page 18 TPS-4.5MB TRAP (TAPPING) 10000 CC756 C CHIP CERA 50V CH 220PF J 2012 10000 ZZ200 PCB CHIP MOUNT B AS DTQ-20D5FS 10000 CC757 C CHIP CERA 50V X7R 0.033MF K 2012 10000 CC151 C CHIP CERA 50V X7R 0.01MF K 2012...
- Page 19 RCV12 R CHIP 1/10 10 OHM J 2012 10000 RC736 R CHIP 1/10 10K OHM J 2012 10000 ZZ200 PCB MAIN (RHU) AS DTQ-20D5FS 10000 RC737 R CHIP 1/10 10K OHM J 2012 10000 C105 C ELECTRO 16V RSS 470MF (10X12.5)TP...
- Page 20 50V RSS 100MF (8X11.5) TP 10000 L800 COIL DELAY LINE RS208 10000 C307 C CERA 500V SL 10PF D (TAPPING) 10000 ZZ200 PCB MAIN M-10 AS DTQ-20D5FS 10000 C308 C MYLAR 50V EU 0.1MF J (TP) 10000 TAPE MASKING 6.2X500 1200 C311 C ELECTRO 50V RT 2.2MF (6.3X11) TP...
- Page 21 10000 X502 CRYSTAL QUARTZ HC-49U 3.579545M (TP) 10000 C806 C CERA 1KV B 1000PF K (TAPPING) 10000 ZZ200 PCB MAIN AXIAL AS DTQ-20D5FS 10000 C807 C MYLAR 50V EU 0.01MF J (TP) 10000 TAPE MASKING 3M #232 6.0X2000M 42000 C815 C ELECTRO 100V RSS 10MF (6.3X11) TP...
- Page 22 SERVICE PARTS LIST PART NAME PART DESCRIPTION REMARK PART NAME PART DESCRIPTION REMARK J023 WIRE COPPER AWG22 1/0.65 TIN COATING J524 WIRE COPPER AWG22 1/0.65 TIN COATING J024 WIRE COPPER AWG22 1/0.65 TIN COATING J525 WIRE COPPER AWG22 1/0.65 TIN COATING J025 WIRE COPPER AWG22 1/0.65 TIN COATING...
- Page 23 SERVICE PARTS LIST PART NAME PART DESCRIPTION REMARK J804 WIRE COPPER AWG22 1/0.65 TIN COATING J805 WIRE COPPER AWG22 1/0.65 TIN COATING J807 WIRE COPPER AWG22 1/0.65 TIN COATING J808 WIRE COPPER AWG22 1/0.65 TIN COATING J809 WIRE COPPER AWG22 1/0.65 TIN COATING J810 WIRE COPPER AWG22 1/0.65 TIN COATING...
- Page 24 DIFFENENT PARTS LIST...
- Page 25 DIFFERENT PART LIST...
- Page 26 DIFFERENT PART LIST...
- Page 27 DIFFERENT PART LIST...
- Page 28 DIFFERENT PART LIST...
- Page 29 DIFFERENT PART LIST...
- Page 30 DIFFERENT PART LIST...
- Page 31 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 : leesk@web.dwe.co.kr TEL : 82-2-360-7802 FAX : 82-2-360-7877...
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Page 32: 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 33 APPENDIX 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 34 APPENDIX IC DESCRIPTION 3) On Screen Displays function is interior designed. 4) Package. : 42 PIN SDI P. : I 2 C Bus. 5) Tuner (Pre-scaler.) /PLL IC : TAU 6014-S(SIEMENS). 6) Remocon. : The IC of Transmission (MITSUBISHI M50560) 7) E 2 PROM.
- Page 35 APPENDIX 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 36 -High(DC_5V):The only TV. (Option) -Low(DC_0V):Line.(Videl) Reception -High(DC_5V):Cable. (Option) -Low(DC_0V):Air. Audio -High(DC_5V):Mono.. (Option) -Low(DC_0V):Stereo. P13/ Remote -High(DC_5V):Mishubishi. PWM1 (Option) -Low(DC_0V):Daewoo(Only at Factory) Blue Back -High(DC_5V):No Blue Back. P14/PWM2 (Option) -Low(DC_0V):Blue Back. -Output P15/ Option -High(DC_5V):V-Chip. Format. PWM3 (V-Chip) -Low(DC_0V):No V-Chip. -CMOS/Nch Option -High(DC_5V):Auto Tint.
- Page 37 APPENDIX IC DESCRIPTION Terminal Name Explanation Remarks -16 pin is a spare pin. -13 pin to 16 pin. -4 bit input/output port, Nch-OD output. P87 / AN7 SPARE A/D -Input or output can be specified for each bit. -Other function. .AD converter input port (4 lines) -Reset terminal.
- Page 38 APPENDIX IC DESCRIPTION Terminal Name Explanation Remarks P70 / INT0 Sound Input - 4-bit input/output port. - Input or output can be specified for each bit. P71 / INT1 - #31 : Only Cn-220, ITT(MSP) P72 / INT2 SD In Low : Front Mask/Mono, High : Back/stero TO IN -Other function.
- Page 39 APPENDIX 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...
- Page 40 APPENDIX IC DESCRIPTION I801 POWER CONTROL MODULE DPM 001 TI PIN NO DESCRIPTION PIN NO DESCRIPTION GATE DRIVE 1 +12V INPUT POER CONTROL SOURCE GND 1 GND 2 GATE +133V INPUT GATE DRIVE 2...
- Page 41 APPENDIX IC DESCRIPTION ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Supply Voltage Output Peak Current (inernally limited) Ptot Total Power Dissipation (Tcase=70oC) Operationg Temperature 0 to 70 Tstg, Tj Storage and Junction Temperature -40 to + 150 THERMAL DATA Symbol Description Value Unit...
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Page 42: Troubleshooting Guide
APPENDIX 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 R814 C814 133V C804 Check C820 waveform TUNER D808 R809... -
Page 43: No Picture
APPENDIX 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... -
Page 44: No Sound
APPENDIX TROUBLESHOOTING GUIDE 3. NO SOUND NG : Go to the figure e Check audio output signal of I101 #1 OK : Go to the figure f 3-1. CN-220B CHASSIS U102 SF101 IF OUT TUNER SAW FILTER T-DATA T-CLOCK Check #29 #30 IF AGC voltage Check... - Page 45 APPENDIX TROUBLESHOOTING GUIDE 3-2. CN-220C CHASSIS U102 SF101 IF OUT TUNER SAW FILTER T-DATA T-CLOCK Check #29 #30 IF AGC voltage Check I701 SIF output signal Check MICOM IF Vcc (5V) I101 If no signal, then change I101 #11 #12 Check SIF input signal XC701...
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Page 46: Don't Stop
APPENDIX 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 47: No Color
APPENDIX 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 I101 X502 RGB Vcc (9V) R OUT G OUT B OUT Check R/G/B signal 6. NO VERTICAL DEFLECTION Check the voltage Check... -
Page 48: No On-Screen Display
APPENDIX 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,...
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