Daewoo-DCB86-cd-sm 电路图 维修手册.pdf

《Daewoo-DCB86-cd-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Daewoo-DCB86-cd-sm 电路图 维修手册.pdf（57页珍藏版）》请在收音机爱好者资料库上搜索。

1、DVH-100A RadioFans.CN 收音机爱 好者资料库 1 SPECIFICATIONS.2 ADVANTAGES OF THIS PRODUCT.3 TROUBLE SHOOTING.5 WAVEFORMS.23 CIRCUIT DIAGRAM.26 PCB CIRCUIT BOARD.36 INSTRUMENT DISASSEMBLY.39 ELECTRICAL PARTSLIST.45 CONTENTS RadioFans.CN 收音机爱 好者资料库 2 SPECIFICATIONS Disc type DVDVIDEO-CDCD Analogue Audio output48

2、/96KHz sampling44.1KHz sampling44.1KHz sampling Digital Audio output48KHz sampling44.1KHz sampling44.1KHz sampling Optical digital audio output48KHz sampling44.1KHz sampling44.1KHz sampling Output Power200-240V, 50/60Hz Consumed electricity22W Weight4.6kg Dimension (W x H x D)435mmx93mmx255mm Operat

3、ive temperature+5C40C Installation conditionHorizontal / Relative humidity under 80% Laser output5mW (continuous wave max.) Wave length635nm (DVD), 730nm (CD) Signal typePAL COLOR Antenna Input/outputU/V-mixed: 75unbalanced VIDEO input1.0Vp-p (unbalanced, RCA JACK) AUDIO input-8.8dBm, RCA JACK VIDEO

4、 output(common use of DVD and VCR)VIDEO output terminal, 1.0 Vp-p unbalanced, RCA JACK, SCART JACK VIDEO output (DVD only)RGB output (75In load R: 0.7Vp-p, G:0.7Vp-p, B:0.7Vp-p) AUDIO output(common use of DVD and VCR)Audio output terminal (2 kinds): -5.8dBm(VCR), 2Vrms(DVD), RCA JACK AUDIO output (D

5、VD only)Analogue AUDIO output : 2.0Vrms Digital audio output (OPTICAL, COAXIAL) Playable tapeVery high dense tapes with VHS marks Playable discDVD, VIDEO-CD, CD (12cm), CD (8cm), MP3, CD-R, CD-RW Tape speedSP: 23.39mm/s, LP: 11.70mm/s PlaytimeSP: 3hrs, LP: 6hrs (use of E180tape) Clock display24 hrs

6、Time Recording8 programs a month Persistence in power failure1min VIDEO S/N (VCR)Over 43dB(Standard recording) Resolution VCROver 240 lines (Standard recording) DVDOver 400 lines (Playback DVD) AUDIO (VCR)Over 65dB AUDIO (DVD)90dB AUDIO dynamic range90dB DVD Audio output standards RadioFans.CN 收音机爱

7、好者资料库 ADVANTAGES OF THIS PRODUCT 3 DVD, VCD, CD, CD-R(MP3), CD-RW, VHS Watching DVD for recording broadcast Integrated remote control (VCR, DVD) VISS function Multiplex sound playback/record High Sound Quality of 6 head Hi-Fi Simple record function MP3 file playback function (CD-R disc having record

8、s of MP3 files) GUI (Graphical User Interface) through OSD (On Screen Display) By using the DISPLAY button on the remote control, information on the DVD/VCD/CD player and disc, can be displayed on the TV screen. Screensaver function (DVD) 3D sound (3D sound effect using 2 speakers) High bit / High s

9、ampling with 27MHz / 10bit video encoder High bit / High sampling with 96MHz / 24bit Audio D/A Converter Coaxial, Optical digital Audio output (PCM, Dolby Digital, dts) You can enjoy high-level digital audio by connecting with amp embedded with Dolby Digital / dts decoder. Built-in Dolby Digital dec

10、oder (DVD) Analog audio 2-channels output for DOWNMIX (x1) Composite video output (x1) Slow Forward / Reverse playback (DVD) Fast Forward / Reverse playback Search of title, chapter, and time in DVD disc, and search of time and track time in VCD. Various TV aspect (DVD) 4:3 for Pan and Scan, 4:3 for

11、 Letter Box, and 16:9 for Wide Repeat playback (title, chapter, and part for DVD/ track, disc, and part for VCD/CD) Selective Play (DVD/VCD/CD) You can select and play the desired title / chapter of DVD and track of Video CD/CD in STOP mode. Parental Lock function (DVD) This function can prevent pla

12、yback of software that may be unsuitable for children. Multi Audio function (DVD) The audio soundtrack can be heard in up to 8 languages. In the case of SVCD or VCD, it depends on the disc. (The number of audio languages depends on the software.) 4 ADVANTAGES OF THIS PRODUCT Multi Subtitle function

13、(DVD) The subtitle can be seem in up to 32 languages. In the case of SVCD or VCD, it depends on the disc. (The number of subtitle languages depends on the software.) Multi Angle function (DVD) This function allows you to choose the viewing angle of scenes which were shot from a number of different a

14、ngles. (The number of angles depends on the software.) Screen zoom function (DVD/VCD) 5 TROUBLESHOOTING 1. POWER CIRCUIT CAUTION You must use insulated transformer during the first part test of POWER circuit. Check IC501, IC701 No power POWER cord is ok? Is 400V200V voltage obtained at C804 +? Outpu

15、t voltage of 2nd parts is normal? Check rectifier diode of 2ndparts ; D821, D822, D823, D824, D825, D826, D827 Switching pulse of Q801 collector is normal? OK Exchange POWER CORD Check F801. Exchange rectifier diode of 2nd parts ; D821, D822, D823, D824, D825, D826, D827. Check Q801. NO YES YES YES

16、YES YES NO NO NO NO 2. SYSTEM CIRCUIT 6 TROUBLESHOOTING No LED display. Is 5V obtained at IC701 pin #9, 25? Oscillation at IC701pin #1? Specific GRID/SEG doesnt function. Check R588, D857, L503, L860 Exchange IC701. Check IC 701 pin #2224, 27, 28, 30, 31. Check IC 701 pin #1012, 1421. NO YES YES NO

17、NO GRID output at PORT of IC701? YES SEGoutput at PORT of IC701? Exchange IC701. YES A. LED DISPLAY NO 7 TROUBLESHOOTING Noise appears on the playback screen. Is noise diminished by tracking adjustment. Noise band is trembled up and down? Re-adjust PATH. Is the height of CTL HEAD normal? No dust? Is

18、 there problem in CTL Input circuit and amplifier. YES NO NO NO Is there CTL pulse at IC501 pin#97? Check IC501. Noise appears on the screen even though changing tape. Re-adjust the height of AC HEAD. Remove the dust. Check C510,R545R547 IC 501 pin #91, 92, 98. NO Re-adjust PATH. B-1. Bad playback q

19、uality (1) YES YES YES YES Noise appears on the Full playback screen. Are SW pulse and HA SW normal? Recheck step B-1 (Bad playback quallty (1). Check HEAD AMP connector and HEAD. YES YES NO NO ENVE Wave at PT01 pin #4? Check VIDEO circuit. Are there SW, HA SW pulse at IC501 pin #16, 18? Check PCB P

20、attern. Check IC501. B-2. Bad playback quality (2) YES NO YES 8 TROUBLESHOOTING No broadcasting signal received Is the output at IC501 pin# 61(CLK), 60 (DATA) normal? Is SIF,Video output at TMI(RF101) pin#16,19 normal? Check IC 501. Check IC301. Check IC501. YES YES NO NO NO Is Video Signal input at

21、 IC501 pin#50? Is there Video output at IC501 pin#52? Check TMI (RF101) Block. NO Check Video Buffer Q670, Q671 C. No broadcasting signal received YES YES YES 9 TROUBLESHOOTING Cassette tape isn t inserted. Is 5V voltage obtained at Loading parts IC501 pin#2? Is 14V voltage obtained at Capstan Motor

22、 P501 pin#2? Check at EVER 14V Check Q850. Connect Capstan and Loading Motor. Check connector and Capstan Motor. YES NO NO NO Is 13V voltage obtained at Each parts of Loading Motor? Replace Loading Motor. Check D851 and POWER circuit. D. No CASSETTE Loading YES YES E. AUTO STOP in Playback mode VCR

23、stops automatically in playback mode. Check R544,C516 and P501 pin#11. Check S501, S502 REEL Sensor. Is D.PG/FG pulse at IC501 pin#90 normal ? Is C. FG pulse at IC501 pin#87 normal ? Is there REEL Pulse at IC501 pin#79, 80? Check and replace IC501. NO YES YES YES NO Check C.FG(R543,C517) and P501 pi

24、n#1. NO 10 TROUBLESHOOTING F. DRUM Motor stops G. CAPSTAN doesn t rotate CAPSTAN doesn t rotate. Is EVER 14V voltage obtained at P501 pin#2? YES NO NO NO YES YES Is Capstan PWM fit to IC501 pin#77? Is 3.2V voltage obtained at P501 pin#5? Is 2.7V voltage obtained at P501 pin#9? Check P501 Connector a

25、nd Capstan Motor. Check EVER 14V. (Q850) Check Capstan FG (IC 501 pin# 87). Check R541,R540,R539,R538,C518 Check R537,R536,C521 DRUM Motor stops. Is 14V voltage obtained at P501 pin#8? YES NO NO NO YES YES Is DRUM PWM fit to IC 501 pin#76? Is 2.6V voltage obtained at P501 pin#12? Check Capstan Motor

26、 and DRUM Motor. Check EVER 14V (Q850). Check DRUM PG/FG (IC 501 pin# 90). Check R534,R535,C519,C520. NO 11 TROUBLESHOOTING 3. VIDEO circuit A. EE screen doesn t appear EE MODE Picture NG Is Video signal input at IC301 pin#48,50,52,54? Is 5V supplied at pin#42,55,72,91of IC301? Is C.S, DATA, CLOCK s

27、ignal input pin#67,68,69 of IC301? Check IF and LINE IN JACK. Check POWER circuit. Check IC501 pin #58,71,72. NO YES YES NO NO YES Is signal output from pin#65 of IC301? YES NO Check IC301 pin#62 Q-V Sync. Is signal input into pin#50 of IC501? YES NO Check PCB Pattern. Is signal output from pin#52 o

28、f IC501? YES NO Is 5V supplied to pin#53, 98, 99 of IC501? Is signal output at IC301 pin#61? YES NO Check PCB Pattern Q309, Q310. Check IC 501 YES Check POWER circuit. NO Is signal input at IC301 pin#56? Check RF Output. Check PCB Pattern & LINE out. YES YES Check IC301. NO 12 TROUBLESHOOTING B. Pla

29、yback picture doesn t appear YES YES Is Y SIGNAL output at IC301 pin#46? Is VIDEO SIGNAL output at IC301 pin#65? Check and Replace IC301. PB video signal missing. Is Envelope output from IC301 pin#79? NO NO Same as EE MODE check. Is 5V supplied at IC301 pin#91? Is SW Pulse input at IC301 pin#70? Is

30、5V obtained at IC301 pin#24, 42,55,72,91? Check POWER 5V. Check IC501 pin#18. Clean head or Replace head. Check POWER 5V. NO NO Check PATTERN NO YES YES YES YES YES YES NO Does X301(4.43MHz) oscillate? Is Y SIGNAL input at IC301 pin#43? NO Check PATTERN YES NO Replace X301. NO Check and replace IC30

31、1. 13 TROUBLESHOOTING Is +5V supplied at IC301 pin#91? NO NO YES YES Is VIDEO SW Pulse input at IC301 pin#70? Is REC signal output from IC301 pin#94,95,89,90? LP MODE: 89,90 Pin SP MODE: 94,95Pin Check video HEAD and Connector. Is signal input into IC301 pin# 48,50,52,54,56? Check POWER circuit. Che

32、ck IC501 pin#18. Record video signal poor. Check EE MODE. YES Is luminance and color signal output from IC301 pin#78? Replace IC301. NO NO YES C. No recording YES Is IC301 pin#80 REC(H) HIGH?Check IC501 pin#45. NO 14 TROUBLESHOOTING NO Is Video signal input at IC501 pin#50? Check POWER circuit. No O

33、SD appears. Is 5V obtained at IC501 pin# 53, 98, 99? Is Video signal output at IC501 pin#52? NO Replace IC501. D. No OSD(On Screen Display) appears YES YES NO Check IC 501.Check IC 501. NO Check PCB Pattern Check FFC CABLE & DVD Module DVD Composite signal doesn t appear Is signal output at PD01 pin

34、# 5? Is signal at IC301 pin#56? NO E. No DVD Video YES YES Remark previous 3-A Is signal at IC301 pin#61? Check IC301 NO Check RF output. YES YES Check Line output 15 TROUBLESHOOTING 4. AUDIO (Hi-Fi MODEL) No sound in RF E-E mode Is Audio signal output at IC601 pin #3, 13? A. No sound in E-E mode a.

35、 RF E-E Check IC501. Is Audio signal output at IC251 pin#16,17? Are CLK and DATA obtained at IC251 pin#42,43? NO Is 5V obtained at IC251 pin#40? Replace IC251. YES YES Is 12V obtained at IC251 pin#34? NO YES Check POWER circuit. YES Replace IC601. Is 5V obtained at IC051 pin#1? Check Power circuit.

36、NO Is there SIF signal at IC051 pin#2 in RF mode? Check RF101. NO YES Is there SIF signal out at IC051 pin#30, 31? Check IC051. NO YES YES Comparing with switching table, are SWA, B CTL SIGNAL right at IC601 pin #9,10? NO Check Output JACK. YES YESNO 16 TROUBLESHOOTING b. AV1 E-E No sound in AV1 E-E

37、 mode. NO Check Input AV1 JACKIs Audio signal at IC251 pin#6, 7? Is Audio signal output at IC601 pin #3, 13? Check IC501. Is Audio signal output at IC251 pin#16,17? Are CLK and DATA obtained at IC251 pin#42,43? NO Is 5V obtained at IC251 pin#40? Replace IC251. YES YES Is 12V obtained at IC251 pin#34

38、? NO YES Check POWER circuit. YES Replace IC601. YES Comparing with switching table, are SWA, B CTL SIGNAL right at IC601 pin #9,10? NO Check Output JACK. YES YESNO 17 TROUBLESHOOTING c. AV2 E-E No sound in AV2 E-E mode. NO Check Input AV2 JACKIs Audio signal at IC251 pin#8, 9? Is Audio signal outpu

39、t at IC601 pin #3, 13? Check IC501. Is Audio signal output at IC251 pin#19, 20? Are CLK and DATA obtained at IC251 pin#42,43? NO Is 5V obtained at IC251 pin#40? Replace IC251. YES YES Is 12V obtained at IC251 pin#34? NO YES Check POWER circuit. YES Replace IC601. YES Comparing with switching table,

40、are SWA, B CTL SIGNAL right at IC601 pin #9,10? NO Check Output JACK. YES YESNO 18 TROUBLESHOOTING d. DVD E-E No sound in DVD E-E mode. Is there DVD Audio at ICD01 pin#7,8? Is 12V obtained at ICD03 pin#8? Is Audio(DVD) signal at IC601 pin#2,15? YES YES Check ICD03. NO Check ICD01, DVD board NO Check

41、 POWER circuit. NO Is DVD Audio signaloutput at ICD03 pin#1,7? Check ICD03. NO YES Is Audio signal output at IC601 pin #3, 13? Check IC501. YES Replace IC601. Comparing with switching table, are SWA, B CTL SIGNAL right at IC601 pin #9,10? NO Check Output JACK. YES YESNO 19 TROUBLESHOOTING Is Audio s

42、ignal at IC601 pin#1, 12? Check Input Front JACK. NO Is Audio signal output at IC601 pin #3, 13? Check IC501. YES Replace IC601. Comparing with switching table, are SWA, B CTL SIGNAL right at IC601 pin #9,10? NO Check Output JACK. YES YESNO e. FRONT E-E No sound in Front E-E mode. 20 B. No Hi-Fi Pla

43、yback audio(PLAY MODE) NO Check A.SW at IC501 pin#19. Is Audio signal at IC251 pin#41? Is Audio signal output at IC601 pin #3, 13? Check IC501. Is Audio signal output at IC251 pin#16,17? Are CLK and DATA obtained at IC251 pin#42,43? NO Is 5V obtained at IC251 pin#40? Replace IC251. YES YES Is 12V ob

44、tained at IC251 pin#34? NO YES Check POWER circuit. YES Replace IC601. Comparing with switching table, are SWA, B CTL SIGNAL right at IC601 pin #9,10? NO Check Output JACK. YES YESNO 21 C. No Hi-Fi playback in record/playback mode (REC MODE) Are there Audio signal at IC251 pin#49? Is FM OSC signal a

45、t IC251 pin#36? Check input LINE1 JACK. Check input LINE2 JACK. Check ICD03(DVD). Replace DRUM. YES NO NO NO Is FM OSC signal at P401 pin#2? Replace IC251 YES HEAD CLEANING. YES D. No NORMAL AUDIO playback (PLAY MODE) Is Playback Audio signal at IC301 pin#11? Replace IC251. YES NO NO Is there Playba

46、ck Normal Audio signal at IC251 pin #17,18? Check A/C HEAD and IC301 YES Check Output JACK. YES Is there normal Audio signal at IC251 pin#17, 18? NO Check power circuit. NO Voltage at IC251 pin#34 is 12V? Voltage at IC251 pin#40 and at IC301 pin#18 is 5V? 22 TROUBLESHOOTING E. No NORMAL AUDIO playback in record/playback mode(Check in REC mode) No Normal Audio playback in record/playback mode Are there Audio signal at IC251 pin#49? Is there recording signal at IC251 pin#21? Check Input LINE1 JACK. Check Input LINE2 JACK. Check ICD03(DVD). Ch