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S/M No:CN071N-010
Service Manual
TV / VCR Combination
CHASSIS : CN-071
MODEL :
DVQ-13H1FC
DVQ-19H1FC
DVQ-13H2FC
DVQ-19H2FC
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr
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TABLE OF CONTENTS SAFETY PRECAUTIONS ................................................................................................. 2 SPECIFICATION .......................................................................................................... 5 BLOCK DIAGRAM ....................................................................................................... 6 IC DESCRIPTION .........................................................................................................
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SAFETY PRECAUTIONS CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. SUBJECT : X-RADIATION NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC- TURER°ØS APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY 1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSON- VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANT NEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTENTIAL RESULTING PROPERTY DAMAGE OR USER INJURY. SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PICTURE TUB
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SAFETY PRECAUTIONS 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 familiar with all of the following safety checks and servicing guide- the service personnel to th
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SAFETY PRECAUTIONS 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 are flow across the bottom, bolts or screws used for fasteners
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SPECIFICATION ITEMS MODEL DVQ-13/19H1FC, DVQ-13/19H2FC REMARK TV STANDARD NTSC-M SECTION TUNING SYSTEM Frequency Synthesizer(FS) Tuning System TUNING RANGE VHF : 2 - 13(12) UHF : 14 -69(56) CATV : 1-125(125) ANTENNA INPUT IMPEDENCE 75 ohm Unbalanced AUXILIARY INPUT TERMINAL Front : Video, Audio VIDEO FORMAT VHS NTSC Standard SECTION VCR SYSTEM Rotary 2-Head Helical Scanning Monaural System AUDIO RECORDING SYSTEM Monaural TAPE SPEED SP:33.35mm/s
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BLOCK DIAGRAM 6
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BLOCK DIAGRAM 1 0 H P 7
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IC DESCRIPTION ICS01 DW37760MCA-AA1(M37760) : IC TIMER / SYSCON / CTL PROCESSOR ) L ( T T c Y U U N N c N I T I O I O V N E G D I F F G P F c G E E P F N c ) A G M ) O V + - R R G A B C D 0 F S A ( ( M M L A P P P U U P P C M M M M Y L L L E N M T T T M M R R M A E A A A A K A A C C C A A D D A C R C C C C - ) T ) ) ) T T S 1 9 C C + N N N N 2 C L C I I I I 1 U 5 6 7 C U / U S T ( C L F T ( ( ( N P T ) P O 1 O E O G V V T G N N 8 8 8 A V 0 M C F P I I 1 / P ( R F M F P /
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IC DESCRIPTION 1. SYSTEM FEATURE 1) The system for TV/VCR tuning is Frequency Synthesis type. 2) VCR SERVO Controller is interior designed. 3) Closed Caption function is interior designed. 4) Parental Control function is interior designed. 5) On Screen Display function is interior designed. 6) Package : 100PIN QFP 7) Tuner (Pre-scaler) : IIC BUS /PLL IC : TAU 6014-S (SIEMENS) 8) REMOCON : The IC of transmission (MITSUBISHI M50560) 9) EEPROM : 24AT08 (IIC BUS) 10)10-Local Key :
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IC DESCRIPTION 2. PIN DESCRIPTION Pin Terminal Name Explanation Remarks 1 P11(0) KEY 1 IN Power, Ch up/down, Vol up/down 2 P7(7) AGC IN Connect this port to AGC of Tuner. Default voltage :3.75V Variable voltage : 3.25V, 3.5V, 3.75V 3 P7(6) OPTION H(5V) : Parental control M(2.5V) : Child lock L(0V) : None 4 P7(5) DRUM SELECT H(5V) : NTSC 4 head L(0V) : NTSC 2 head 5 P7(4) PATH ADJUST Automatic PATH adjust 6 P7(3) VIDEO ENVELOPE IN Connect this port to 6 pin of IZ01. Maximum point search DC ENVE
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IC DESCRIPTION Pin Terminal Name Explanation Remarks 26 P4(7) AUDIO MUTE H Connect this port to 95 pin of ICY01. When special play, set audio mute. 27 P4(6) Not used 28 P4(5) REC LED H Light up LED(RED) when recording 29 P4(4) TIMER REC LED H Light up LED(GREEN) when ready to programming record. 30 P4(3) MONITOR ON H When CRT on, set "H". 31 P4(2) VCR ON H Recording when CRT off, set "H" 32 P4(1) RELAY ON H When CRT on, relay on during 1sec. 33 P4(0) Not used 34 RESET RESET(L) RESET 35 P3(1) X
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IC DESCRIPTION Pin Terminal Name Explanation Remarks 60 P0(4) OSD BLANK OUT Fast blanking control signal. Switch TV image signal and Caption/OSD image signal. 61 P0(3) Not used 62 P0(2) OSD B OUT Blue output terminal of OSD image. 63 P0(1) OSD G OUT Green output terminal of OSD image. 64 P0(0) OSD R OUT Red output terminal of OSD image. 65 P10(7) S DATA IIC data I/O. Control VCR Y/C, TUNER, EEPROM 66 P10(6) Not used 67 P10(5) S CLOCK IIC clock output 68 P10(4) CAP PG mon Not used 69 P10(3) DRUM
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IC DESCRIPTION Pin Terminal Name Explanation Remarks 89 P8(1) DRUM FG IN Drum Frequency Generator signal input. Feed back Drum rotation speed. 90 DRUM PG IN Drum Pulse Generator signal input. Feed back Drum rotation phase. 91 AMP REF IN Control pulse AMP reference input terminal. 92 AMP REF OUT Control pulse AMP reference output terminal. 93 P8(0) C AMP filter. 94 CTL- Input control pulse when playing. 95 CTL+ Output control pulse when recording. 96 AMP C AMP condenser. 97 CTL AMP OUT Check Cont
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IC DESCRIPTION IC501 DCT814B(LA76814B) : IC VIDEO PROCESSOR 14
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IC DESCRIPTION ICY01 LA71550M : IC VCR Y/C & AUDIO PROCESSOR 15
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IC DESCRIPTION I801 POWER CONTROL MODULE DPM 001 TI KSE 14 13 12 11 10 6 5 4 3 2 1 PIN NO DESCRIPTION PIN NO DESCRIPTION 1 GATE DRIVE1 10 +12V INPUT 2 OCP 11 POWER CONTROL 3 SOURCE 12 +26 OUTPUT 4 GND1 13 GND2 5 GATE 14 +133V INPUT 6 GATE DRIVE2 16
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TROUBLESHOOTING GUIDE 1. NO POWER Check Check Check R802(10W 2.2) F801(125V 4A) D801(PBS208GU) D801 F801 R802 C804 TO I501 #34 PWC01 L801 OCP Q821 C826 D820 L824 Check 133V Voltage R820 133V C821 B+ D821 Check R110 45V TUNER 33V Waveform Check Voltage H/D TRANS 45V C822 BACKUP 5V D822 L823 Check DS02 10V K1A7805 Voltage Q801 DS01 EVER 5V C823 C829 R805 PQ05RF11 D823 VCR 5V 12V PQ12RF11 R807 MOTOR 12V Check C824 Voltage SOUND 12V I801 10V #10 Check #1 Voltage #14 133V #3 #5 #11 VCR ON H ICS01 #31
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TROUBLESHOOTING GUIDE 2. TV PART 2-1) NO PICTURE NG : GO to the figure a Check the waveform of I501 #46 OK : GO to the figure b Check a Voltage 33V 5V Check IF Vcc(5V) IF OUT U102 Z101 TUNER SAW FILT Check Check #5 #6 #8 Signal AFT Reset #10 Check #3 #65 #67 Voltage #10 #4 SDATA SCLK #34 MCLK #71 #12 #46 MDATA VCC #37 #72 #11 #44 #35 #36 #38 #39 Check XCS01 Signal Check XS02 Waveform Check the X-TAL Check Check Signal b CHROMA Vcc(5V) Check Z502 #44 Check 200V LINE HOR. Vcc(5V) CC527 #43
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TROUBLESHOOTING GUIDE 2-2) NO SOUND NG : GO to the figure c Check the waveform of I501 #1 OK : GO to the figure d Check c Voltage 33V 5V Check IF Vcc(5V) IF OUT U102 Z101 TUNER SAW FILT Check Check #5 #6 #8 Check Signal Reset AFT AGC Voltage #10 #3 #65 #67 #10 SDATA SCLK Check #9 FM filter #34 circuit MCLK #71 #12 MDATA #54 VCC #37 #72 #11 #52 #35 #36 #38 #39 Check XCS01 Check Signal SIF Signal XS02 Check the X-TAL If SIF no signal, then change I501 d Check Check Voltage AUDIO OUT C606 R
