Daewoo DV6T811N-LT Manual de usuario
S/M No. : VTB811NET0
Service Manual
T
DAEWOO ELECTRONICS CO., LTD.
Jun. 2002
http : //svc.dwe.co.kr
VCR
DVD
REPEAT
OPEN/CLOSE
DISPLAY
TITLE/PBC
MENU
PR
PR
OUTPUT
PREV
REC
PROGRAM
CLK/CNT
SPEED/ANGLE
TRACKING
TV/VCR
MARK
SEARCH
SYSTEM
PLAY/PAUSE NEXT
ZOOMAUDIOSUBTITLE
RETURN/OK
CLEAR/3D
SETUP
ENTER
MODEL : DV6T811N-LT
DV6T813N-QJ
DV6T821N-QJ/X
DV6T813N-QJ/X
DV6T823N-QJ/M
1
SPECIFICATIONS ..................................................................................................................2
ADVANTAGES OF THIS PRODUCT ......................................................................................3
TROUBLE SHOOTING .......................................................................................................................5
WAVEFORMS ...................................................................................................................................25
CIRCUIT DIAGRAM .........................................................................................................................28
PCBCIRCUITBOARD.....................................................................................................................39
INSTRUMENTDISASSEMBLY......................................................................................................44
ELECTRICAL PARTSLIST................................................................................................................49
CONTENTS
1.
2.
3.
4.
5.
6.
7.
8.
2
SPECIFICATIONS
DVD Audio output standards
Power AC 120V, 60Hz
Consumed electricity 24W (supplementary 2.5W)
Weight 5.7kg
Dimension (WxHxD) 430mmx91mmx355.5mm
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 (OPTICAL, 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 Standard: 33.35mm/s, 3 times: 11.12mm/s
Playtime Standard: 2hrs, 3 times: 6hrs (use of T120tape)
Clock display 12 hrs AM/PM
Time Recording 8 programs a year
Persistence in power failure 1min
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
Optical digital audio output 48KHz sampling 44.1KHz sampling 44.1KHz sampling
Output
1.
ADVANTAGES OF THIS PRODUCT
3
* DVD, VCD, CD, CD-R(MP3), CD-RW, VHS, S-VHS playback function
* DVD one-touch record function
* Watching DVD for recording broadcast
* Integrated REMOTE (VCR, DVD)
* Ultra power savings : less than 3W for stand-by mode
* VISS function
* Multiplex sound playback/record
* High Sound Quality of 6 head Hi-Fi
* One Touch timer Recording (OTR
)
* MP3 file playback function (CD-R disc having records of MP3 files
)
* Various video type-supported (AUTO, NTSC and PAL)
* 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, Optical 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)
* S-Video out (x1)
2.
4
ADVANTAGES OF THIS PRODUCT
* 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)
* Bookmark function (DVD)
Playback position can be made to remember up to 3 positions for speedy search.
* 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.
* 3 languages OSD (On Screen Display) function (DVD)
You can select and display OSD in 3 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)
* Thumbnail view function (in VCD with inactivated PBC)
5
TROUBLESHOOTING
1. POWER CIRCUIT
✓ CAUTION
You must use insulated trance during the first part test of POWER circuit.
Check IC601,IC701.
No power
POWER cord is ok?
Is 400~140V voltage
obtained at C805 +?
Output voltage of 2nd
parts is normal?
Check
rectifier diode of 2nd parts ;
D821, D822, D823, D825,
D826, D827, D828.
Switching
pulse of IC801 pin#4 or
pin#5 is normal?
OK
Exchange POWER CORD
Check
G801,L801,L802,D801.
Exchange rectifier diode of
2nd parts ; D821, D822, D823,
D825, D826, D827, D828.
Check IC801.
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
3.
2. SYSTEM CIRCUIT
6
TROUBLESHOOTING
No VFD display.
Is 5V obtained at IC701 pin#1?
Is -26V obtained at IC701
pin#16~17?
Oscillation at IC701 pin #2?
Is -22V, -18V obtained at F
F+?
Specific GRID/SEG doesn’t
function.
Check D701.
Check POWER circuit at -26V.
Check C704, IC701.
Check IC 701 pin #18~27.
Check IC 701 pin #28~43.
NO
YES
YES
YES
YES
NO
NO
NO
NO
GRID output at PORT of
IC701?
YES
SEG output at PORT of IC701?
Check POWER circuit at F-, F+.
Exchange IC601.
YES
A. VFD DISPLAY
NO
7
TROUBLESHOOTING
No power compensation.
Voltage of power fail (IC601
pin#100) at micom is 0.7V over?
More than 3.2V is maintained
for 1 minutes at IC601 pin#37
during Power Cord Open.
Check R625.
NO
YES
B. No power compensation.
YES
Check RESET circuit.
NO
Exchange IC601.
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.
C-1. Bad playback quality (1)
YES
YES
YES
YES
8
TROUBLESHOOTING
Noise appears on the Full
playback screen.
Are SW pulse and HA SW
normal?
Recheck step C-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.
C-2. Bad playback quality (2)
No broadcasting signal
received
Is the output at IC601 pin#
71(CLK), 72 (DATA) normal?
Is SIF,Video output at
TMI(RF101) pin#18,20 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 Q101
D. No broadcasting signal received
YES
YES
NO
YES
YES
YES
9
TROUBLESHOOTING
Cassette tape isn’t
inserted.
Is 5V voltage obtained at
Loading parts IC604 pin#82?
Is 13V voltage obtained at
Capstan Motor pin#8?
Check at ON/OFF 12.
Check (D822, Q821).
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.
E. No CASSETTE Loading
YES
YES
F. AUTO STOP in Playback mode
VCR stops automatically
in playback mode.
Check R656,C659 and P603 pin#11
Check P502 connector.
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(R665, C660)
and P603 pin#1.
NO
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