Daewoo DPC-7200N User manual

S er v ice M a nua l
LCD Color Monitor &
DVD Player
Model: DPC-7200N
S/ M No. : OSPC7200N1
May. 2005
C aution
: In this Manual, some parts can be changed for improving,
their performance without notice in the parts list.

-2-
CONTENTS
----------------
Specification....................................................... ............................................... ...
3
Block Diagram................................... ................................................................ ... 5
General Alignment Instruction....................................................................... ...... 7
Troubleshooting........................................................................................... ... ... ..
8
PrintedCircuitBoard........................................................................................ ... ... 10
ICBlock Diagram and LeadIdentification....................................................... .. .. 16
Explode View........................................................................................................ ...... . 31
SchematicDiagram......................................................................................... ..... .. 32

-3-
SPECIFICATION
LCD MONITOR
Model No.: DPC-7200N Output: 50mW/16ohm SupplyVoltage:
Description Condition Unit LimitNominal
Headphone Output1KHz0dB mW 3±23
Headphone NoiseNo Signal mV <1mV<1mV
L1KHz0dB mW 600±100 600
SPK MAXOutput R1KHz0dB mW
600±100
600
L1KHz0dB mW
600±100
600
SPK MAXOutput(AV IN) R1KHz0dB mW
600±100
600
REF THD 1KHz0dB %53
SPK S/N Infinity zere/-dB/L&R dB 35 35
Headphone S/N Infinity zere/-dB/L&R dB 60 60
Luminance(MAX)White Signal LUX 300±50 300
Luminance(8STEP)White Signal LUX 250±50 250
Luminance(MIN)White Signal LUX 100±50 100
20HzdB ±30
125HzdB ±30
10KHzdB ±30
L
20KHzdB ±30
20HzdB ±30
125HzdB ±30
10KHzdB ±30
Headphone RESP
R
20KHzdB ±30

-4-
DVD
Model No.: DPC-7200N Output:50mW/16ohm Supply Voltage:
Description Condition Unit LimitNominal
VideoSignal LevelVp-p 0.7±0.1 0.7
SYNC LevelVp-p 0.3±0.1 0.3
Videoout level
75% color
bar/75ohm Vp-p
1.0±0.2 1
Videoout level(Unload) 75%color bar Vp-p 2.0±0.2 2
CD 1KHz/0dB/10K V2.0±0.2 2
Audio out level DVD
1KHz/0dB/10K V2.0±0.2
2
20Hz dB ≤±3 0
125Hz dB ≤±3 0
10KHz dB ≤±3 0
FREQ RESP (DVD)
(20Hz~20KHz)
20KHz dB ≤±3 0
Signal-to-noiseradio Infinity zere/-dB/L&R dB 60 60
Audiodistortion&noise(DVD) 1KHz/0dB/L&R dB ≤-65 -65
Dynamicrange(DVD) 1KHz/-60dB dB 85 85
R/L Cross sound(DVD) 1KHz/0dB/L&R dB 45 45
1KHzChannel unbalance(DVD) 1KHz/0dB/L&R dB ≤3 0
Power Consumption StandbyW00
DC 9V Rating W ≤12 ≤12
ECC EntircityABEXTDV-552 um
100 100
Scratch ABEXTDV-541 mm
1.6 1.6
Black dotABEXTDV-545 mm
ф0.8
0.8
Finger Print ABEXTDV-545 um
ф65
65
Verticaldeviation ABEXTDV-533 mm
0.6 0.6
Note: Nominal specs represent the design specs. All units should be abletoapproximate these. Somewill
exceed and some maydrop slightlybelow these specs.Limit specsrepresent the absolute worstcondition that
might still be considered acceptable. In no case should a unit fail to meet limit specs.

-5-
BLOCK DIAGRAM
LCD
OZ9936
YC
H
S
Y
N
C
S
W
R
G
B
IR3Y31
8
D
0
2
DC
RT9266
+12V +7V -10V
7
”
L
G
P
A
N
E
L
H.V. TRAN
DC
H
I
G
H
V
O
L
T
A
G
E
O
S
C

-6-
DVD
1234
A
B
C
D
E
F
4321
F
E
D
C
B
A
MPEGDECODER RISCCONCROL
MTK1389D
EEPROM
AT24C02-SOP8
ICDATA
ICCLK
SERVODRIVER
CD5954
SPINDLEVELOCITYERROR
FETEDRIVER
PICKUP
FOCUSTRACKSLEDDRIVER
MOTORVELOCITY
RFSIGNALGROUP
27.000MHZ
8BITBUS
KEYSIGAL
16BITBUS
SDAM4Mx16BIT
FLASH1Mx8BIT DECODERMICROCODE
REMOTE SENSOR
AUDIODACAUDIO
AMP
FILTER
VIDEODAC
VIDEOOUT
AUDIODATABUS
L&R
L&ROUT
+9VINPUT
DC/DCCONVERT
+5V+3.3V
DC/DCCONVERT
8032MCU SERVODSP
KEYBOARD
DVDDECK

-7-
GENERAL ALIGNMENTINSTRUCTION
TheMain PCB of Monitor Modification:
1. Input voltage is 6.8V-16V, input signal is test circuit BY5418.
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.
Themain PCBof DVD Modification:
1. Adjust the brightness to the brightest byVR, adjust video pattern’scolor to white, test the screen
Brightness is 200±102 LUX.
With luminometer You can adjust R69 to get this standard.

-8-
TROUBLESHOOTING
LCD
SYMPTOM CAUSEREMEDY
LCD MONITOR PART
1) Picture distortion &Defective capacitor (C201) &Replace capacitor C201.
2) No Picture &Defective IC (IR3Y31).
&
Replace IC IR3Y31.
3) No Picture, Picture no
Good
&Defective Q7, Q8. &Replace Q7, Q8.
4) Color is no good &Defective X201. &Replace X201.
5) SYNC no good &Defective IC 8D02. &Replace IC 8D02.
6) TINT no good &Defective S201, S202
&
Replace S201,S202.
7) NO Picture &Defective IC RT9266. &Replace RT9266.
8) Picture no good
&Defective CON1. &Replace CON1.
9) Brightness no good
&Defective IC M5237 Q10. &Replace IC M5237 Q10.

-9-
DVD
SYMPTOM CAUSEREMEDY
DVD PART
1)No Power &Power source is not correct.
The positive and negative does not
match the unit.
&Power button defective.
&Defective triode U7.
&Replace power source.
&Change the position of
positive and negative.
&Replace power button.
&Replace U7.
2)No Picture &Defective U10 (24C02N).
&Defective U5.
&Defective IC MTK1389D.
&Replace U10 (24C02N).
&Replace U5.
&Replace IC MTK1389D.
3)No Sound &Defective U14 (C4558).
&Defective U1 (14053).
&Defective U2.
&Replace U14 (C4558).
&Replace U1 (14053).
&Replace U2.
4)Sound no good &Defective U14.
&Replace U14.
5)Can not read DISC &Defective U18.
&PICK-up Laser is defective.
&Replace U18.
&Replace pickup.
6)No keyfunction &Defective IC MTK1389D. &Replace IC MTK1389D.
7)No remote control function &Defective REMOTE.
&
Keyis Defective.
&Replace REMOTE.
&
Replace keys.

-10-
PRINTED CIRCUITBOARD
Monitor MainPCB
Top View

-11-
Monitor MainPCB
Bottom View

-12-
BatteryCharger Circuit PCB
Top View

-13-
BatteryCharger Circuit PCB
Bottom View

-14-
DVDMain PCB
Top View

-15-
DVDMain PCB
Bottom View

-16-
IC BLOCK DIAGRAM & DESCRIPTION
IC IR3Y31
1. TRAP 13. TINT 25. VCC237. SYNC OUT
2. H FILTER OUT 14. VCOIN 26. BLK 38. SYNC SEP
3. VIDEO IN 15. APC FILTER27. SUB BRIGHT R 39. EXT B IN
4. IDENT FILTER 16. VCOOUT 28. SUB BRIGHT B 40. EXT G IN
5. C IN 17. GND 29. FRP 41. EXT R IN
6. COLOR 18. VEE 30. GAMMA1 42. CONTRAST
7. SW19. R DC DET 31. GAMMA2 43. VCC1
8. KILLER FILTER 20. R OUT 32. BRIGHT 44. F ADJ
9. PEAK LIMITTER21. G DC DET 33. S/H PULSE R 45. CLAMP
10. RGB AMPLITUDE 22. G OUT 34. S/H PULSE G 46. AGC FILTER
11. ACC FILTER 23. B DC DET 35. S/H PULSE B47. AGC OUT
12. R-Y/B-YPHASE 24. B OUT 36. SYNC IN 48. PICTURE
AGCDET
ACC
APC
VCO
TINT
PAL SW
F/F
HPF
KILLER
2 1 6 45 47 46 48 38 37 36 19
PHASE
SHIFT
IDENT
AGC AMP
CLAMP
SW
PICTURE
SYNCSEP
BGP GEN
VREF INV INV INV
20 21 22 23 24
BRIGHTBRIGHTBRIGHT
29
32
28
27
10
31
30
42
9
34
35
33
DEMOD MATRIX INT/EXT SW
26
rrr
3
44
5
11
15
14
16
13
4
S/H S/H S/H
S/H
S/H
COMP
Y/C
NP
COMP
Y/C COMP
Y/C
NP
FROMSYNC IN P
N
18 17 43 25 8 12 7 41 40 39
R-Y
G-Y
B-Y
Y
BGP
36
IR3Y31
35 34 33 32 31 30 29 28 27 26 25
111210897654213
37
38
39
40
41
42
43
44
45
46
47
48 13
14
15
16
17
18
19
20
21
22
23
24

-17-
IC BLOCK DIAGRAM & DESCRIPTION
IC 8D02C
64 PIN FUNCTION DESCRIPTION -1
Pin Name I/O Description Remark
1VCC Powersupply Note 1
2CSY IComposite sync. Input pin
3RS4IResolution mode setting pin 4 Note 2
4RS3IResolution mode setting pin 3 Note 2
5RS2IResolution mode setting pin 2 Note 2
6RS1IResolution mode setting pin 1 Note 2
7DM4 IDisplaymode setting pin 4 default=1
8DM3 IDisplaymode setting pin 3 default=1
9DM2 IDisplaymode setting pin 2 default=1
10 DM1 IDisplaymode setting pin 1 default=1
11 SDC IColor arrangement mode selection pin, Stripe=1, Delta=0 default=1
12 DLT IDelta mode selection pin default=1

-18-
IC BLOCK DIAGRAM & DESCRIPTION
IC 8D02C
Pin
Name I/O Description Remark
13 HPO OH-POS position adjustment output signal
14 HPI IH-POS position adjustment input signal
15 PDAOPhase detect A output pin
16 CKC IControl HSY& VSYpin forselect I/O direction default=1
17 OSOOOscillatoroutput pin
18 OSIIOscillatorinput pin
19 FD2 IMaster clockfrequencydivide by2 function (FD2=0,/2) default=1
20 NC1
21 ZMIIConnect capacitor to ground
22 ZMOOConnect Resistor to pin 21.
23 CBG ISimultaneousCP2, CP3 sampling clockselect pindefault=1
24 SAM ISimultaneous(1) or sequential (0)sampling select pin default=0
25 RLC ISource driver shift right /left select pindefault=1
26 OEHOSource driver control signal
27 SH2 OHorizontal start pulse 2 forsource driver (RLC=0,OUT)
28 SH1 OHorizontal start pulse 1 forsource driver (RLC=0,OUT)
29 CP3 OSampling clock3 to source driver
30 CP2 OSampling clock2 to source driver
31 CP1 OSampling clock1 to source driver
32 GND Ground
33. VCC Power supplyNote 1
34 Q1H OSource driver control signal
35 RST OVertical reset signal for source driver
36 CPVOScan clockto gate driver
37 OE1OGate driverScan output enable control
38 OE2OGate driverscan output enable control
39 OE3OGate driverscan output enable control
40 NC2 default=1
41 SV1 OVertical start pulse 1 for gate driver (UDC=1, OUT)
42 SV2 OVertical start pulse 1 for gate driver (UDC=1, OUT)
43 UDC IUp/down scan direction select pin default=1
44 VP1 IVertical position adjustment fordisplayarea default=0
45 VP2 IVertical position adjustment fordisplayarea default=0
46 VP3 IVertical position adjustment fordisplayarea default=0

-19-
IC BLOCK DIAGRAM & DESCRIPTION
IC 8D02C
47 VP4 IVertical position adjustment fordisplayarea default=1
48 POI IPower ON initialize; and UOBsignal input Note 3
49 POD IPower ON delay; VCO adjust can connect to GND. Note 4
50 NC3 Note 5
51 NPC ONTSC/PAL detect output &Control pin, NTSC=1, PAL=0 Note 6
52 NC4 Note 5
53 G24 IGate 240=1 or 244=0 select pin default=1
54 3OE I3 OEV=1 or 1 OEV=0 select pin default=0
55 NC5 default=1
56 VSYI/O Vertical sync. input/Negative output pin Pullhigh
57 HSYI/O Horizontal sync, input/Negative output pin Pullhigh
58 BLKOOutput for control RGB signal
59 ESYOOutput external sync. Forcontrolchroma decoder
60 COM OOutput VCOM polaritysignal
61 FRP OVideo polarityalternating signal
62 NC6 default=1
63 VIYIVertical sync, input, if no use please connect to GND. Note 2
64 GND Ground

-20-
IC BLOCK DIAGRAM & DESCRIPTION
IC M5237
-
+
Voliage
Gemrator
.
PROTECTION
CIRCUIT
THERMAL
PROTECTION
CIRCUIT
Oven-currfnt
CIRCUIT
START
CIRCUIT
Protrction
ASO
CIRCUIT
1
2
3
ADJUGT
V IN
GROUND
INPUT
(V1) OUTPUT
(V0)
R2
R1
IC RT9266
PIN PIN NAMEPIN PIN NAME
1. CE 4LX
2. EXT5VDD
3. GND 6FB
PIN PIN NAME
1. V IN
2. GROUND
3. ADJUST