Daewoo DV6T834N Bedienungsanleitung
S/M No. : VTB834NET2
Service Manual
MODEL:DV6T834N/DV6T834
DV6T844N/DV6T844
DV6T854N/DV6T854
DV6T864N/DV6T864
DV6T935N/DV6T935
DV6T945N/DV6T945
DV6T955N/DV6T955
DV6T965N/DV6T965
✔ 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 (http://svc.dwe.co.kr).
DAEWOO ELECTRONICS CO., LTD.
Sep. 2003
http : //svc.dwe.co.kr
1
SPECIFICATIONS...............................................................................................................2
ADVANTAGES OF THIS PRODUCT....................................................................................3
TROUBLE SHOOTING....................................................................................................................5
WAVEFORMS ................................................................................................................................23
VOLTAGE CHARTS ......................................................................................................................26
CIRCUIT DIAGRAM.......................................................................................................................30
PCB CIRCUIT BOARD..................................................................................................................40
INSTRUMENT DISASSEMBLY .....................................................................................................43
ELECTRICAL PARTSLIST............................................................................................................53
CONTENTS
2
SPECIFICATIONS
DVD Audio output standards
Power AC 120V, 60Hz
Consumed electricity 24W (supplementary 4W)
Weight 4.6kg
Dimension (WxHxD) 435mm x 93mm x 255mm
Operative temperature +5¡C~35¡C
Installation condition Horizontal / Relative humidity under 80%
Received channels VHF: 2-13 CH / UHF: 14-69 CH / Cable: 1-125
Signal type NTSC COLOR
Antenna Input/output U/V-mixed: 75Ωunbalanced
VIDEO input 1.0 Vp-p unbalanced, RCA JACK
AUDIO input -8.8dBm, RCA JACK
VHF output 3 or 4 CH
VIDEO output
(common use of DVD and VCR)
VIDEO output terminal, 1.0 Vp-p unbalanced, RCA JACK
VIDEO output (DVD only) S-VIDEO output (75ΩIn load Y: 1.0Vp-p, C:0.286Vp-p)
COMPONENT output (75ΩIn load Y: 1.0Vp-p, Pb:0.7Vp-p, Pr:0.7Vp-p)
AUDIO output
(common use of DVD and VCR)
Audio output terminal (2 kinds): -8.8dBm(VCR), 2.0Vrms(DVD), RCA JACK
AUDIO output (DVD only) Analogue AUDIO output (2 CH): 2.0Vrms
Digital audio output (COAXIAL)
Playable tape Very high dense tapes with VHS marks
Playable disc DVD, VIDEO-CD, CD (12mm), CD (8mm), MP3, CD-R, CD-RW
Tape speed SP: 33.35mm/s, SLP: 11.12mm/s
Playtime SP: 2hrs, SLP: 6hrs (use of T-120 tape)
Clock display 12 hrs AM/PM
Time Recording 8 programs a year
VIDEO S/N (VCR) Over 45dB(Standard recording)
Resolution VCR Over 220 lines (Standard recording)
DVD Over 500 lines (DVD Disc PLAY)
AUDIO (VCR) Over 69dB (Hi-Fi), over 40dB (Mono)
AUDIO (DVD) 90dB
AUDIO dynamic range 90dB
Disc type
DVD VIDEO-CD CD
Analogue Audio output 48/96KHz sampling 44.1KHz sampling 44.1KHz sampling
Digital Audio output 48KHz sampling 44.1KHz sampling 44.1KHz sampling
Output
ADVANTAGES OF THIS PRODUCT
3
¥ DVD, VCD, CD, CD-R(MP3), CD-RW, VHS playback function
¥ Watching DVD for recording broadcast
¥ Integrated remote control (VCR, DVD)
¥ VISS function
¥ Multiplex sound playback/record
¥ High Sound Quality of 6 head Hi-Fi (Hi-Fi Model only)
¥ One Touch timer Recording (OTR)
¥ Progressive scan
¥ MP3 file playback function (CD-R disc having records of MP3 files)
¥ GUI (Graphical User Interface) 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 sampling with 27MHz / 10bit video encoder
This unit has 27MHz / 10bit capability, that enables the faithful reproduction of fine images.
¥ High bit / high sampling with 96KHz / 24bit audio D/A converter
With this 96KHz / 24bit linear Pulse Code Modulated signals, which constitute the highest specifications in the DVD
standards, you can enjoy faithfully reproduced sound in all of its various modes. To support 96KHz sampling / 24bit
sound, the shaping noise of this multi-level digital sigma type of D/A converter is kept flat up to 44KHz, thus
preventing the important audio signals from being affected.
¥ Coaxial digital 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 decoder (DVD)
¥ Analog audio 2-channels output for DOWNMIX (x1)
¥ Composite video out (x1)
¥ Slow Forward / Reverse (DVD) playback
¥ Fast Forward / Reverse playback
¥ Search of title, chapter, and time in DVD disc, and search of track and time in VCD and CD
¥ Various TV aspect (DVD)
4:3 for Pan and Scan, 4:3 for Letter Box, and 16:9 for Wide
¥ Repeat playback (title and chapter for DVD, track and disc for VCD/CD)
4
ADVANTAGES OF THIS PRODUCT
¥ Repeat a defined period from A to B (DVD)
¥ 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.
¥ Various languages OSD (On Screen Display) function (DVD)
You can select and display OSD among various languages. (English, French, Spanish)
¥ Parental Lock function (DVD)
This function can prevent playback 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 CVD, it depends on the disc.
(The number of audio languages depends on the software.)
¥ Multi Subtitle function (DVD)
The subtitle can be seen in up to 32 languages. In the case of SVCD or CVD, 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
angles. (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 IC601,IC751.
No power
POWER cord is ok?
Is 200V~140V voltage
obtained at C804 +?
Output voltage of 2nd
parts is normal?
Check
rectifier diode of 2nd parts ;
D821, D822, D823, D826,
D827, D828, D830
Switching
pulse of Q801 collector is
normal?
OK
Exchange POWER CORD
Check F801.
Exchange rectifier diode of 2nd
parts ; D821, D822, D823, D826,
D827, D828, D830.
Check Q801.
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
2. SYSTEM CIRCUIT
6
TROUBLESHOOTING
No LED display.
Is 5V obtained at IC751
pin #9, 25?
Oscillation at IC751 pin #1?
Specific GRID/SEG doesnÕt function.
Check R830, D831, L751, L824.
Exchange IC751.
Check IC 751 pin #22~24, 27,
28, 30, 31.
Check IC 751 pin #10~12, 14~21.
NO
YES
YES
NO
NO
GRID output at PORT of IC751?
YES
SEG output at PORT of IC751?
Exchange IC751.
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 there problem in CTL Input
circuit and amplifier.
YES
NO
NO
NO
Is there CTL pulse at IC601
pin#97?
Check IC601.
Noise appears on the screen even
though changing tape.
Re-adjust the height of AC HEAD.
Remove the dust.
Check C651, C652, R651~R653
IC601 pin #91, 92, 98.
NO
Re-adjust PATH.
B-1. Bad playback quality (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
IC601 pin #16, 18?
Check PCB Pattern.
Check IC601.
B-2. Bad playback quality (2)
YES
NO
YES
8
TROUBLESHOOTING
No broadcasting signal
received
Is the output at IC601 pin# 71(CLK),
72 (DATA) normal?
Is SIF,Video output at TMI(RF101)
pin#13,16 normal?
Check IC 601.
Check IC301.
Check IC601.
YES
YES
NO
NO
NO
Is Video Signal input at IC601
pin#50?
Is there Video output at IC601
pin#52?
Check TMI (RF101) Block.
NO
Check Video Buffer Q102
C. No broadcasting signal received
YES
YES
YES
9
TROUBLESHOOTING
Cassette tape isnÕt inserted.
Is 5V voltage obtained at Loading
parts IC601 pin#82?
Is 13V voltage obtained at
Capstan Motor P601 pin#8?
Check at EVER 13V
Check Q854.
Connect Capstan and Loading Motor. Check
connector and Capstan Motor.
YES
NO
NO
NO
Is 12V 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 stops automatically in
playback mode.
Check R656,C659 and P601
pin#11.
Check S603, S604 REEL Sensor.
Is D.PG/FG pulse at IC601
pin#90 normal ?
Is C. FG pulse at IC601 pin#87
normal ?
Is there REEL Pulse at IC601
pin#79, 80?
Check and replace IC601.
NO
YES
YES
YES
NO
Check C.FG(R660, C660) and
P601 pin#1.
NO
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