Daewoo DPC-7301N User manual

REV. 0
(7.0-Inch) LCD Color Monitor &
DVD Player
MODEL : DPC-7301N LMD-6708RW）
2006/Aug.

-2-
CONTENTS
----------------
Specification....................................................... ............................................... ...
3~4
Block Diagram................................... ................................................................ ... 5~6
General Alignment Instruction....................................................................... ...... 7
Troubleshooting........................................................................................... ... ... .. 8~9
Printed Circuit Board........................................................................................ ... ... 10~17
IC Block Diagram & Description........................................................................ .. .. 18~33
Explode View........................................................................................................ ...... . 34
Schematic Diagram......................................................................................... ..... .. 35~43

-3-
SPECIFICATION
LCD MONITOR
Description Condition Unit Limit Nominal
Headphone Output 1kHz 0dB mW 3±23
Headphone Noise No Signal mV <1mV <1mV
L1kHz 0dB mW 600±100 600
SPK MAX Output(DVD) R1kHz 0dB mW 600±100 600
L1kHz 0dB mW 600±100 600
SPK MAX Output(AV IN) R1kHz 0dB mW 600±100 600
REF THD 1kHz 0dB %31
Headphone S/N Infinity zere/-dB/L&R dB ≥50 ≥50
Luminance(MAX) White Signal LUX 300±50 300
Luminance(8step) White Signal LUX 250±50 250
Luminance(MIN) White Signal LUX 100±50 100
20Hz dB ±30
125Hz dB ±30
10kHz dB ±30
L
20kHz dB ±30
20Hz dB ±30
125Hz dB ±30
10kHz dB ±30
Headphone RESP
R
20kHz dB ±30

-4-
DVD
Description Condition Unit Limit Nominal
Video Signal Level Vp-p 0.7±0.1 0.7
SYNC Level Vp-p 0.3±0.1 0.3
Video out level
75% color bar/75ohm
Vp-p 1.0±0.2 1
Video out level(Unload) 75% color bar Vp-p 2.0±0.2 2
CD 1kHz/0dB/10K V0.6±0.2 0.7
Audio out level DVD 1kHz/0dB/10K V2+0/-0.6 1.4
20Hz dB ≤±30
125Hz dB ≤±30
10kHz dB ≤±30
FREQ RESP (DVD)
(20Hz~20kHz)
20kHz dB ≤±30
Signal-to-noise radio Infinity zere/-dB/L&R dB ≥60 ≥60
Audio distortion & noise (DVD) 1kHz/0dB/L&R dB ≤-65 -65
Dynamic range (DVD) 1kHz/-60dB dB ≥85 ≥85
R/L Cross sound (DVD) 1kHz/0dB/L&R dB ≥45 ≥45
1kHz Channel unbalance 1kHz/0dB/L&R dB ≤30
Power Consumption Standby W ≤1 ≤1
DC 9V Rating W ≤12 ≤12
Power Standby (Battery Current) Standby uA ≤10 ≤10
ECC Entircity A BEX TDV-552 um ≥100 100
Scratch A BEX TDV-541 mm ≥1.6 1.6
Black dot A BEX TDV-545 mm ≥ф0.8 0.8
Finger Print A BEX TDV-545 um ≥ф65 65
Vertical deviation A BEX TDV-533 mm ≥0.6 0.6
Note: Nominal specs represent the design specs. All units should be able to approximate these. Some will
exceed and some may drop slightly below these specs. Limit specs represent the absolute worst condition that
might still be considered acceptable. In no case should a unit fail to meet limit specs.

-5-
BLOCK DIAGRAM
LCD

-6-
DVD

-7-
GENERALALIGNMENT INSTRUCTION
The Main PCB of Monitor Modification:
1. Input voltage is 6.8V-16V, input signal is test circuit BY 5418.
2. Adjust VR1 to get test point: 15720Hz..
3. Adjust VR1 to get horizontal phase shift.
4. Adjust VRB4 to get good performance.
The main PCB of DVD Modification:
1. Adjust the brightness to the brightest by VR, adjust video pattern’s color to white, test the screen
Brightness is 200±102 LUX.
With luminometer You can adjust R69 to get this standard.

-8-
TROUBLESHOOTING
LCD
SYMPTOM CAUSE REMEDY
LCD MONITOR PART
1) Picture distortion &Defective capacitor (C202)
&Replace capacitor (C202).
2) No Picture &Defective IC (D3031).
&Replace IC (D3031).
3) No Picture, Picture no
Good
&Defective IC (CSC 3414A). &Replace IC (CSC 3414A).
4) Color is no good &Defective X201.
&Replace X201.
5) SYNC no good &Defective IC CSC1004D. &Replace IC CSC1004D.
6) NO Picture
&Defective IC SS6608. &Replace SS6608.
7) Picture no good
&Defective CON4. &Replace CON4.
8) Brightness no good
&Defective IC SS9969. &Replace IC SS9969.
9) No Back Light
&Defective IC MP1029EM. &Replace IC MP1029EM.

-9-
DVD
SYMPTOM CAUSE REMEDY
DVD PART
1) No Power &Power source is not correct.
The positive and negative does not
match the unit.
&Power button defective.
&Defective triode U1(S-8521F33).
&Replace power source.
&Change the position of
positive and negative.
&Replace power button.
&Replace U1(S-8521F33).
2) No Picture &Defective T3 (24C02N).
&Defective T4 (S29AL0080).
&Defective U2 MTK1389DE.
&Replace T3 (24C02N).
&Replace T4 (S29AL0080).
&Replace U2 MTK1389DE.
3) No Sound &Defective U8 (4558D).
&Defective U6 (TDA2822).
&Replace U8 (4558D).
&Replace U6 (TDA2822)..
4) Sound no good &Defective U8 (4558D).
&Replace U8 (4558D).
5) Can not read DISC &Defective U3 (AT5654).
&PICK-up Laser is defective.
&Replace U3 (AT5654).
&Replace pick up.
6) No key function &Defective U2 IC MTK1389DE. &Replace U2 IC MT1389DE
7) No remote control function &Defective REMOTE.
&Key is Defective.
&Replace REMOTE.
&
Replace keys.

-18-
IC BLOCK DIAGRAM & DESCRIPTION
IC201 D3031
BLOCK DIAGRAM
VREF INV INV INV
BRIGHT BRIGHT BRIGHT
à à Ã
S/H S/H S/H
S/H
S/H
INT/EXTSW
MATRIX
DEMOD
R-Y
G-Y B-Y
IDENT
F/F
PAL.SW
PHASE
SHIFT
TINT
VCO
APC
ACC.DET
ACC
REG1 REG2 REG3
TRAP
COLOR
COMP
Y/C CLAMP
AGCAMP AGCDET
PICTURE
SW SYNCSEP
BGPGEN
BGP
N
Y/C
N
P
N
fromSYNCIN
IDENTFIL
TINT
VCO OUT
VCO IN
APC.FH
ACC.FIL
CIN
Y/C
COMP
FADJ
VIDEO IN BLK
FRP
S/H PULSEG S/H PULSEG S/H PULSEG
33 35 34
9
42
30
31 27 28 32 26 29
23 2421 2219 203637384846474561
2
3
41
5
15 14 16 13
4
1718 43 25 8 12 7
SW 394041
EXT RIN
EXT GIN
EXT BIN
PN VCC1
HPF
KIL.LER
B DC DET
B OUT
G DCDE T
G OUT
R DC DET
R OUT
SYNC.IN
SYNC
OUT
SYNC
SEP
PICTUREAGC
FILTER
AGC
OUT
CLAMP
COLOR
TRAPH FIL OUT
COMP
H.FILTER
VCC1
VCC1
GNDVIE V
CC2 KILLE R FIL
P
P
10
BRIGHT
BRIGHTSUB B
SUB BRIGHT R RGB AMPLITUDE
γ1 γ2
CONTRAST PEAK LIMIT
γ