DAEWOO ELECTRONICS DPC-7200PD User manual
-2-
CONTENTS
----------------
Specification....................................................... ............................................... ...
3
Block Diagram................................... ................................................................ ...
5
General Alignment Instruction....................................................................... ......
7
Troubleshooting........................................................................................... ... ... ..
8
Printed Circuit Board........................................................................................ ... ...
10
IC Block Diagram and Lead Identification....................................................... .. ..
16
Explode View........................................................................................................ ...... .
31
Schematic Diagram......................................................................................... ..... ..
32
-3-
SPECIFICATION
LCD MONITOR
Model No.: LMD-4708GQU Out put: 50mW/16ohm SupplyVoltage:
Description Condition Unit
Limit Nominal
Headphone Output 1KHz0dB mW
3±23
Headphone Noise No Signal mV
<1mV <1mV
L1KHz0dB mW
600±100
600
SPK MAX Output 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 Infinityzere/-dB/L&R
dB 35 35
Headphone S/N Infinityzere/-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.: LMD-4708GQU Out put: 50mW/16ohm SupplyVoltage:
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
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-noise radio Infinityzere/-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
1KHzChannel unbalance (DVD)
1KHz/0dB/L&R
dB ≤3 0
Power Consumption StandbyW00
DC 9V Rating W ≤12 ≤12
ECC EntircityA BEX TDV-552
um
100 100
Scratch A BEX TDV-541
mm
1.6 1.6
Blackdot 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 designspecs. All units should be able toapproximate these. Somewill
exceed andsomemaydropslightlybelowthese 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.
-6-
DVD
DVD DECK
PICK UP
EEPROM
AT24C02-SOP8
FILTER AUDIO DAC
T1343 AU
D
I
O
A
M
P
SERVO DRIVER
A5954
DC/DC CONVERT
FLASH 1Mx8 BIT
DECODER
MICRO CODE KEY BOARD
SDAM 4Mx16B
I
T
REMOTE
SENSOR
SERVO DSP
MPEG DECODER
RISC CONCROL
8032MCU MT1389C
1
6
B
I
T
B
U
S
L
&
R
O
U
T
L
&
R
A
U
D
I
O
D
A
T
A
B
U
S
VIDEO OUT
27.000MHZ
VIDEO DAC
KEY SIGAL
SPINDLE
VELOCITY
ERROR
FE TE DRIVER
F
O
C
U
S
T
R
A
C
K
S
L
E
D
D
R
I
V
E
R
M
O
T
O
R
V
E
L
O
C
I
T
Y
DC/DC CONVERT
+9V INPUT
+5V +3.3V
I
C
D
A
T
A
I
C
C
L
K
R
F
S
I
G
N
A
L
G
R
O
U
P
-7-
GENERALALIGNMENT INSTRUCTION
The Main 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.
The main PCB of DVD Modification:
1. Adjust the brightness to the brightest byVR, 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
SYMPTOMCAUSE REMEDY
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) TINTno 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
SYMPTOMCAUSE 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 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 MTK1389C.
&Replace U10 (24C02N).
&Replace U5.
&Replace IC MTK1389C.
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 MTK1389C. &Replace IC MTK1389C.
7) No remote control function &Defective REMOTE.
&Keyis Defective.
&Replace REMOTE.
&
Replace keys.
-16
-
IC BLOCK DIAGRAM& DESCRIPTION
IC IR3Y31
1. TRAP 13.
TINT25. VCC237. SYNC OUT
2. H FILTER OUT14.
VCO IN 26. BLK 38. SYNC SEP
3. VIDEO IN 15.
APC FILTER 27. SUB BRIGHTR 39. EXTB IN
4. IDENTFILTER 16.
VCO OUT28. SUB BRIGHTB 40. EXTG IN
5. C IN 17.
GND 29. FRP 41. EXTR IN
6. COLOR 18.
VEE 30. GAMMA1 42. CONTRAST
7. SW19.
R DC DET31. GAMMA2 43. VCC1
8. KILLER FILTER 20.
R OUT32. BRIGHT44. F ADJ
9. PEAK LIMITTER 21.
G DC DET33. S/H PULSE R 45. CLAMP
10.
RGB AMPLITUDE
22.
G OUT34. S/H PULSE G 46. AGC FILTER
11.
ACC FILTER 23.
B DC DET35. S/H PULSE B 47. AGC OUT
12.
R-Y/B-YPHASE 24.
B OUT36. SYNC IN 48. PICTURE
AGCDET
ACC
APC
VCO
TINT
PALSW
F/F
HPF
KILLER
2 1 6 45 47 46 48 38 37 36 19
PHASE
SHIFT
IDENT
AGCAMP
CLAMP
SW
PICTURE
SYNCSEP
BGPGEN
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
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IC BLOCK DIAGRAM& DESCRIPTION
IC 8D02C
64 PIN FUNCTION DESCRIPTION - 1
Pin Name I/O Description Remark
1VCC Power supplyNote 1
2CSYIComposite sync. Input pin
3RS4 IResolution mode setting pin 4 Note 2
4RS3 IResolution mode setting pin 3 Note 2
5RS2 IResolution mode setting pin 2 Note 2
6RS1 IResolution 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 DLTIDelta mode selection pin default=1
-18
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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 PDA OPhase detect A output pin
16 CKC IControl HSY& VSYpin for select I/O direction default=1
17 OSO OOscillator output pin
18 OSI IOscillator input pin
19 FD2 IMaster clockfrequencydivide by2 function (FD2=0,/2) default=1
20 NC1
21 ZMI IConnect capacitor to ground
22 ZMO OConnect Resistor to pin 21.
23 CBG ISimultaneous CP2, CP3 sampling clockselect pin default=1
24 SAM ISimultaneous (1) or sequential (0) sampling select pin default=0
25 RLC ISource driver shift right /left select pin default=1
26 OEH OSource driver control signal
27 SH2 OHorizontal start pulse 2 for source driver (RLC=0,OUT)
28 SH1 OHorizontal start pulse 1 for source 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 RSTOVertical reset signal for source driver
36 CPV OScan clockto gate driver
37 OE1 OGate driver Scan output enable control
38 OE2 OGate driver scan output enable control
39 OE3 OGate driver scan 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 for displayarea default=0
45 VP2 IVertical position adjustment for displayarea default=0
46 VP3 IVertical position adjustment for displayarea default=0
-19
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IC BLOCK DIAGRAM& DESCRIPTION
IC 8D02C
47 VP4 IVertical position adjustment for displayarea default=1
48 POI IPower ON initialize; and UOB signal 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 Pull high
57 HSYI/O Horizontal sync, input/Negative output pin Pull high
58 BLK OOutput for control RGB signal
59 ESYOOutput external sync. For control chroma decoder
60 COM OOutput VCOM polaritysignal
61 FRP OVideo polarityalternating signal
62 NC6 default=1
63 VIYIVertical sync, input, ifno 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 NAME PIN PIN NAME
1. CE 4LX
2. EXT5VDD
3. GND 6FB
PIN PIN NAME
1. V IN
2. GROUND
3. ADJUST
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