Daewoo DPC-7200N Service Manual
S er v ice M a nua l
LCD Color Monitor &
DVD Player
Model: DPC-7200N
S/ M No. : O SPC7200N1
C aution
: In this Manual, some parts can be changed for improving,
their performance without notice in the parts list.
May. 2005
Specification
CONTENTS
----------------
.......................................................…...............................................…………….…..
3
Block Diagram...................................…................................................................…………….…..
General Alignment Instruction.......................................................................……….…….....…
Troubleshooting
Printed Circuit Board........................................................................................……………...…...
IC Block Diagram and Lead Identification.......................................................…………..…..
Explode View........................................................................................................…………......….
Schematic Diagram.........................................................................................…………….....…..
...........................................................................................…...……………...…..
5
7
8
10
16
31
32
-2-
SPECIFICATION
LCD MONITOR
Model No.: DPC-7200N Out put: 50mW/16ohm Supply Voltage:
Description Condition Unit Limit Nominal
Headphone Output 1KHz 0dB mW
Headphone Noise No Signal mV <1mV <1mV
SPK MAX Output
SPK MAX Output(AV IN)
REF THD 1KHz 0dB % 5 3
SPK S/N
Headphone S/N
Luminance(MAX) White Signal LUX 300±50
Luminance(8STEP) White Signal LUX 250±50
Luminance(MIN) White Signal LUX 100±50
L 1KHz 0dB mW
R 1KHz 0dB mW
L 1KHz 0dB mW
R 1KHz 0dB mW
Infinity zere/-dB/L&R∝
Infinity zere/-dB/L&R∝
20Hz dB ±3 0
125Hz dB ±3 0
L
10KHz dB ±3 0
dB
dB
3±2 3
600±100
600±100
600±100
600±100
≥35 ≥35
≥
60
≥
600
600
600
600
60
300
250
100
Headphone RESP
20KHz dB ±3 0
20Hz dB ±3 0
125Hz dB ±3 0
R
10KHz dB ±3 0
20KHz dB ±3 0
-3-
DVD
Model No.: DPC-7200N Out put: 50mW/16ohm Supply Voltage:
Description Condition Unit Limit Nominal
Video Signal Level Vp-p 0.7±0.1
SYNC Level Vp-p 0.3±0.1
Video out level
Video out level(Unload) 75% color bar Vp-p 2.0±0.2
CD 1KHz/0dB/10K V 2.0±0.2
Audio out level
DVD
FREQ RESP (DVD)
(20Hz~20KHz)
Signal-to-noise radio
Audio distortion&noise (DVD) 1KHz/0dB/L&R dB
Dynamic range (DVD) 1KHz/-60dB dB
R/L Cross sound (DVD) 1KHz/0dB/L&R dB
75% color
bar/75ohm
1KHz/0dB/10K
20Hz
125Hz
10KHz
20KHz
Infinity zere/-dB/L&R∝
Vp-p 1.0±0.2
V 2.0±0.2
dB
dB
dB
dB
dB
≤±3
≤±3
≤±3
≤±3
≥60 ≥60
≤-65
≥85 ≥85
≥45 ≥45
0.7
0.3
1
2
2
2
0
0
0
0
-65
1KHz Channel unbalance (DVD) 1KHz/0dB/L&R dB
Power Consumption Standby W 0 0
DC 9V Rating W
ECC Entircity A BEX TDV-552 um
Scratch A BEX TDV-541 mm
Black dot A BEX TDV-545 mm
Finger Print A BEX TDV-545 um
Vertical deviation A BEX TDV-533 mm
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.
-4-
≤3
≤12 ≤12
≥100
≥1.6
≥ф0.8
≥
ф65
≥0.6
100
0
1.6
0.8
65
0.6
LCD
HSYNCSWRG
B
8D0
2
7” LG
PANEL
HIG
HVOLTAGEOSC
BLOCK DIAGRAM
H.V.
TRAN
+12V
+7V
-10V
O Z9936
DC
R T9266
IR3Y31
DC
YC
-5-
DVD
4321
F
E
D
VIDEO OUT
L & R OUT
AMP
REMOTE
L & R
AUDIO DACAUDIO
FILTER
SENSOR
AUDIO DATA BUS
VIDEO DAC
SDAM 4Mx16BIT
16BIT BUS
8BIT BUS
MTK1389D
FLASH 1Mx8 BIT
KEY BOARD
KEY SIGAL
DECODER MICRO CODE
F
E
D
C
B
A
EEPROM
PICK UP
DVD DECK
1 2 34
IC CLK
AT24C02-SOP8
IC DATA
RF SIGNAL GROUP
MOTOR VELOCITY
FOCUS TRACK SLED DRIVER
MPEG DECODER
RISC CONCROL
8032MCU
SERVO DSP
27.000MHZ
FE TE DRIVER
SPINDLE VELOCITY ERROR
CD5954
SERVO DRIVER
-6-
DC/DC CONVERT
+5V+3.3V
DC/DC CONVERT
+9V INPUT
C
B
A
GENERAL ALIGNMENT INSTRUCTION
The Main PCB of Monitor Modification:
1. Input voltage is 6.8V-16V, input signal is test circuit BY 5418.
2. Adjust VRT5 to get test point: 15720Hz..
3. Adjust VRT4 to get horizontal phase shift.
4. Adjust VRT1 to get good performance.
5. Adjust S201. S202 to get good Tint.
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.
-7-
LCD
SYMPTOM CAUSE REMEDY
LCD MONITOR PART
TROUBLESHOOTING
1) Picture distortion & Defective capacitor (C201)
2) No Picture
3) No Picture, Picture no
Good
4) Color is no good & Defective X201.
5) SYNC no good & Defective IC 8D02. & Replace IC 8D02.
6) TINT no good
7) NO Picture
8) Picture no good
&
Defective IC (IR3Y31).
&
Defective Q7, Q8.
&
Defective S201, S202
& Defective IC RT9266. & Replace RT9266.
&
Defective CON1.
& Replace capacitor C201.
&
Replace IC IR3Y31.
&
Replace Q7, Q8.
& Replace X201.
&
Replace S201,S202.
&
Replace CON1.
9) Brightness no good
&
Defective IC M5237 Q10.
-8-
&
Replace IC M5237 Q10.
Replace keys.
DVD
SYMPTOM CAUSE REMEDY
DVD PART
1) No Power & Power source is not correct.
2) No Picture
3) No Sound
The positive and negative does not
match the unit.
& Power button defective.
& Defective triode U7.
&
Defective U10 (24C02N).
&
Defective U5.
&
Defective IC MTK1389D.
&
Defective U14 (C4558).
&
Defective U1 (14053).
&
Defective U2.
& Replace power source.
& Change the position of
positive and negative.
& Replace power button.
& Replace U7.
&
Replace U10 (24C02N).
&
Replace U5.
&
Replace IC MTK1389D.
&
Replace U14 (C4558).
&
Replace U1 (14053).
&
Replace U2.
4) Sound no good
5) Can not read DISC
6) No key function
7) No remote control function & Defective REMOTE.
&
Defective U14.
&
Defective U18.
&
PICK-up Laser is defective.
&
Defective IC MTK1389D.
&
Key is Defective.
&
Replace U14.
&
Replace U18.
&
Replace pick up.
&
Replace IC MTK1389D.
&
Replace REMOTE.
&
-9-
Monitor Main PCB
Top View
PRINTED CIRCUIT BOARD
-10-
Monitor Main PCB
Bottom View
-11-
Battery Charger Circuit PCB
Top View
-12-
Battery Charger Circuit PCB
Bottom View
-13-
Loading...