DAEWOO DDQ-20L6SCN Service Manual

Page 1
TV / DVD Combination
CHASSIS : CN-091
Model : DDQ-20L6SCN
http : //svc.dwe.co.kr
DAEWOO ELECTRONICS Corp.
Jan. 2004
TCN091BEFO
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10WATT
Good earth ground, such as the water pipe, conduit, etc.
1500 OHM
A.C. VOLTMETER
Place this probe on each exposed metal part.
0.15 uF
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AA
AA
DT5
NF20FN
VV
VV
SS
SS
ee
ee
ll
ll
ee
ee
cc
cc
tt
tt
ee
ee
dd
dd
OO
OO
UU
UU
TT
TT
LL
LL
OO
OO
uu
uu
tt
tt
RR
RR
OO
OO
uu
uu
tt
tt
VV
VV
RR
RR
kk
kk
SS
SS
II
II
FF
FF
TT
TT
VV
VV
GG
GG
kk
kk
BB
BB
kk
kk
AA
AA
VV
VV
HH
HH
VV
VV
--
--
DD
DD
ii
ii
ff
ff
ff
ff
rr
rr
aa
aa
cc
cc
tt
tt
ii
ii
oo
oo
nn
nn
YY
YY
,,
,,
cc
cc
bb
bb
,,
,,
cc
cc
rr
rr
11
11
99
99
55
55
VV
VV
HH
HH
BB
BB
++
++
LL
LL
,,
,,
RR
RR
DD
DD
AA
AA
V
VV
VV
,,
,,
LL
LL
,,
,,
RR
RR
VV
VV
,,
,,
LL
LL
,,
,,
RR
RR
VV
VV
,,
,,
LL
LL
,,
,,
RR
RR
SW
YY
YY
//
//
CC
CC
ff
ff
oo
oo
rr
rr
CC
CC
NN
NN
--
--
00
00
99
99
1
,,
,,
AA
AA
VV
VV
22
22
II
II
nn
nn
pp
pp
uu
uu
tt
tt
,,
,,
SS
SS
--
--
VV
VV
HH
HH
SS
SS
II
II
nn
nn
pp
pp
uu
uu
tt
tt
,,
,,
MM
MM
oo
oo
nn
nn
ii
ii
tt
tt
oo
oo
rr
rr
--
--
OO
OO
uu
uu
tt
tt
,,
,,
CC
CC
oo
oo
mm
mm
pp
pp
oo
oo
nn
nn
ee
ee
nn
nn
tt
tt
DD
DD
VV
VV
DD
DD
::
::
MM
MM
ii
ii
dd
dd
dd
dd
ll
ll
ee
ee
LL
LL
ee
ee
vv
vv
ee
ee
ll
ll
SS
SS
yy
yy
ss
ss
tt
tt
ee
ee
mm
mm
((
((
LL
LL
AA
AA
77
77
66
66
88
88
33
33
77
77
))
))
Out
AUDIO OU
OUT
120V
60Hz
V
RR
RR
2
X
2
2
C
D
S
B
F
F
LL
LL
AA
AA
77
77
66
66
88
88
33
33
77
77
2
E
S
LL
LL
CC
CC
88
88
66
66
33
33
22
22
66
66
00
00
--
--
xx
xx
xx
xx
xx
xx
1
2
2
44
44
LL
LL
CC
CC
11
11
6
6
VD Driver 10V, 5.2
MSP 8V
K
K
SS
SS
CC
CC
55
55
33
33
88
88
66
66
L
L
AA
AA
77
77
88
88
00
00
44
44
1
1
K
K
TT
TT
CC
CC
33
33
22
22
22
22
99
99
XX
XX
33
33
T
T
DD
DD
AA
AA
--
--
88
88
99
99
44
44
44
44
JJ
JJ
RR
RR
PP
PP
Y
Y
D
1
S 8
S
N T
WW
WW
WW
WW
F
t
12V
LL
LL
--
-­PP
PP SS
SS
--
-­PP
PP SS
SS
EE
EE
TT
TT RR
RR CC
CC
Y
Y DD
DD
V
rr
rr
22
22
,,
,,
ee
ee
ss
TT
TT BB
BB FF
FF
10V to Chroma
D
11
11
YY
YY
EE
EE
KK
KK
ss
ss
ss
DD
DD
nn
nn
EE
EE
ee
ee
LL
LL
SS
SS
rr
AV-1
Reset
rr ee
ee
vv
vv
ii
ii
rr
rr DD
DD
--
-­TT
TT RR
RR CC
CC
TDA-9183P
MM111
In1
PP
PP MM
MM AA
AA
--
-
Monitor
-­oo
oo
ii
ii dd
dd uu
uu AA
AA
T
T
IIC
EE
EE NN
NN UU
UU TT
TT
IF-OUT
MP
00
00 22
22 44
44 33
33 PP
PP SS
SS
Monitor Out
MM
MM
IIC
11
11 oo
oo
tt
tt 55
55
AA
AA
K
K
R,G,
Y,
OU
CVBS I
In3
SS
SS
In2
V-D
Y/C IN
MM1111X
AV-2
H-
Out
In1
SS
SS
rr
rr ee
ee
vv
vv
ii
ii
rr
rr DD
DD
--
-­VV
VV
CVB
Y,cb,cr
In2
1
1
L
L
S-VH
IIC
F
F
II
II
//
//
aa
aa
mm
mm
oo
oo
rr
rr
hh
hh
CC
CC
rr
rr ee
ee
vv
vv
ii
ii
rr
rr DD
DD
--
-­HH
HH
K
K
rr
rr cc
cc
,,
,, bb
bb cc
cc
,,
,, YY
YY
T
COAXIAL
Reset
DVD Ou
D-Audio
CC
CC EE
EE PP
PP MM
MM //
// rr
rr ee
ee
vv
vv
ii
ii
rr
rr DD
DD DD
DD VV
VV DD
DD
6
6
MM
MM OO
OO RR
RR
2
2
IIC
Control
V-Sync
H-Sync
CVB
IIC
IIC
for FBT
125V
5V 3.3V
Key-in
Remocon-in
rr
rr oo
oo ss
ss ss
ss ee
ee cc
cc cc
cc oo
oo
rr
rr pp
pp oo
oo
rr
rr cc
cc
ii
ii MM
MM
SW & ID & RES
Control
Tuner
for SW/Chroma/Comb-F
Audio-AMP
6V
33V
13
))
)) 22
22 BB
BB 55
55 44
44 44
44
))
44
))
44
00
--
00
-­44
44
MM
MM
55
55
SS
SS
22
22
TT
TT
--
((
--
((
RR
SS
RR
SS NN
NN
MM
MM
((
((
AA
AA
rr
rr
RR
RR
ee
ee
TT
TT
ww
ww
SS
SS
oo
oo
PP
PP
PP
PP
MM
MM
CC
CC
II
II
SS
SS
Indicator
VD
Power-on
ON/OF
AC-IN
5V for Micom
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TV/CATV
PREV CH
3D
M
U
T
E
ENTER
PREV NEXT
CH/SELECT
CH/SELECT
Page 8
OPEN/CLOSE
SETUP
ANGLE
ZOOM
CLEAR
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5. SCHEMATIC DIAGRAM
-10-
5-1 MAIN CIRCUIT DIAGRAM
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SCHEMATIC DIAGRAM
-11-
5-2 POWER CIRCUIT DIAGRAM
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6. EXPLODED VIEW
-12-
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7. PRINTED CIRCUIT BOARD
-25-
7-1 PCB MAIN
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PRINTED CIRCUIT BOARD
-26-
7-2 PCB POWER
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SW-2
SW-1
DVD_SELECT
RESET_DETECT
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D802
CHECK
I800
#6-7 ohm test
(moreX100)
I800
#5 Voltage
CHECK
I800
#7 Waveform
CHECK
D821
Voltage
CHECK
F801(Fuse)
CHECK
N
Y
N
N
N
Y
Y
Y
Y
Y
D802
CHKECK/CHANGE
D802,R821,C804
CHKECK/CHANGE
I810
CHKECK/CHANGE
I701, RLY1
CHECK/CHANGE
R809
CHECK/CHANGE
I800 CHANGE
Fuse CHANGE
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Coil Connection
CHECK
PW501 #5 PIN
CHECK
N
N
Y
Y
Connection check
1701 #41 PIN
CHKECK/CHANGE
DIE-GAUSSING
COIL CHANGE
Q802
Operating
CHECK?
N
Y
Q802 relation circuit
check/CHANGE
R802 CHECK
( 3 ohm )
N
Y
R802
CHKECK/CHANGE
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U101 Voltage
CHECK
N
Y
Tuner B+
Voltage CHECK
U101 CHANGE
Service DATA
Check/Setup
SDA,SCL Operating
CHECK
N
Y
SDA, SCL Circuit
CHECK
U101 AGC
Voltage CHECK
Service DATA
CHECK
N
N
Y
Page 36
I201, I202
Voltage
CHECK
N
Y
B+ Voltage CHECK
I501
CHECK/CHANGE
I701 #31,#32,#37
CHECK/CHANGE
INPUT signal
CHECK
N
Y
signal circuit
CHECK
I201 OUTPUT
#3 signal
CHECK
N
Y
I201, I202
CHECK/CHANGE
U101 (Tuner)
Voltage
CHECK
I201, I202
SW CHECK
N
Y
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Service DATA
CHECK/CHANGE
#10,11 relation
Circuit
CHECK/CHANGE
OSD BL circuit
CHECK
I701 #22,23, 24 OUTPUT
CHECK
I701 #25
OUTPUT
CHECK
I701 #10,11
Oscilation
CHECK
N
N
Y
Y
Y
N
OSD Gain
CHECK
I501 #14,15,
16,17 INPUT
CHECK
N
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Battery
CHANGE
REMOCON
Battery
CHECK
Y
Y
Y
N
I704 B+ (#2)
CHECK/CHANGE
I704 #1
OUTPUT
CHECK
N
Relation circuit
CHECK
I701
CHECK/CHANGE
I701 #34
OUTPUT
waveform
CHECK
N
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H-DRV relation
circuit CHECK
T402 Operating
CHECK
N
Y
(7-1)
(7-1)
(1)
T402 Voltage
CHECK
Y
Y
Y
N
Q401 waveform
CHECK
I501 #27
waveform check
Y N
N
I501
CHECK/CHANGE
I502
Relation circuit CHECK
Q402
CHECK/CHANGE
I501 #25 Voltage
CHECK
N
D890 relation circuit
CHECK
P902 #1
Voltage check
Y
I501 #32 Voltage
CHECK
SCT1,CRT
CHECK/CHANGE
P902 #4
waveform check
Y
N
N
DY
CHECK/CHANGE
DY CONNECTION
CHECK
Y
N
Page 40
I501 #23relation
circuit check
N
I501 #23
Drive Pulse
CHECK
Y
D380 relation circuit
CHECK
N
I301 B+
Voltage Check
Y
DY
CHECK/CHANGE
N
DY Connection
CHECK
Y
C302
CHECK/CHANGE
N
P801 #5 Pulse
waveform check
Y
Q704 relation circuit
CHECK
N
Q704 waveform
CHECK
Y
Relation circuit
CHECK
N
I701 #20 waveform
CHECK
Y
I701
CHECK/CHANGE
Page 41
NO RF PICTURE
#46 relation circuit
CHECK
N
I501 #46
waveform check
Y
JP503/PW201
CHECK
N
I201 #5,7 signal
CHECK
MOVE(4)
Y
MOVE (4)
(Q207 relation circuit)
N
I501 #42
waveform check
Y
I701 relation circuit
CHECK
N
I501 #17 signal
CHECK
Y
Q902-Q907
CHECK/CHANGE
NO AV PICTURE
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I804 relation circuit
check/change
I502
CHECK/CHANGE
#32 relation circuit
CHECK
N
I203 #16
waveform check
Y
N
I501 #32
waveform check
Y
Service data
CHECK/SETUP
I501
CHECK/CHANGE
N
Service Color
CHECK
Y
N
I203 B+
#6 check
Y
Page 43
I804 output Level
(6V) check
N
I601 #24,25
signal check
Y
I602
CHECK/CHANGE
I601
CHECK/CHANGE
N
I602 out signal
#1, 14 check
Y
MOVE(9)
N
I601 #16
Voltage5V check
Y
I701
CHECK/CHANGE
N
I601 #7,8 signal
CHECK
Y
I501
CHECK/CHANGE
N
I601 #47 SIF
signal check
Y
Page 44
WIRE CHANGE
NO DVD
OPERATING
Relation circuit
CHECK
N
PA890 wire
CHECK
Y
CABLE
CHANGE
N
PW590,591
Connecntion
CHECK
Y
MODULE CHANGE
N
DVD
MODULE
CHECK
Y
DVD MODULE
CHANGE
N
I202 #7 signal
CHECK
Y
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