Table of Contents
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MAIN PWB CIRCUIT DIAGRAM [AV-25MT15/P] (1/4), (2/4)
MA8036-X
R738
R737
R985
10K
0
4.7K
Q704
*1
R986
4.7K
BL_GND
PW
3.3V_STB
8V
A_VCC
A_GND
5V
12V
3.3V
NECK
H_DRIVE
HFB
ABL
EW
P_ON/OFF
VDRA+
VDRB-
PROTECT
V12A
32V
TU001
QAU0353-002
TUNER
C111
220/16
C101
CF101
.01
QAX0349-001
MC
IF
R101
68
NC
32V
MC
C001
L101
QQL244K-1R0Z
.01
LOCK
L002
QQL244J-4R7Z
5V
C004
470/16
BM
R001
C003
220
.1
SDA
C109
0
D103
X
R002
220
SCL
D104
X
AS
BT
C005
.0022
AGC
MC
MC
MC
R004
27K
R006
X
R008
X
D001
X
Q002
MAIN PWB ASS'Y (1/4)
SCW-1721A-H2 [AV-25MT15/P]
NOTE) 1.Refer to the part list for the part number of IC701 and IC702.
2.Refer to page 2-21 for voltages of this circuit diagram.
3.Refer to page 2-22 for waveforms of this circuit diagram.
MAIN PWB ASS'Y (2/4) (FRONT LED)
SCW-1721A-H2 [AV-25MT15/P]
CN00C
QGA2501F1-06
IC801
R322
RPM7238-H5
IC302
D303
X
X
REMOTECON
S9648
RECEIVER
ECO
R323
X
R326
R325
X
0
D807
R324
0
C807
R328
0
Q308
C806
X
100/16
R329
R327
C317
X
39K
10/50
QJL001-050600-E
QJL001-050600-E
5V
SDA1
SCL1
Q706
SSM3K02F-X
5V
D
R794
D707
G
*3
2.2K
S
D706
C777
C778
C792
.1
47/16
.1
R760
100
SCL0
Q705
D
Q708
SSM3K02F-X
*2
SDA0
G
S
R795
Q707
R761
100
100K
*1
R976
1K
3.3V_STB
Q791
*1
SCL0
SDA0
C793
Y791
R793
100
4.7/50
R790
X
PW
1K
D713
P_ON/OFF
MA8039/H/-X
R984
R983
R982
R981
47K
3.9
3.9
47K
1/2W
1/2W
V1.8A
VssP2
Q982
*1
1.8V
VssC4
L701
C701
*4
1.8V
.22
V1.8C4
Q984
*1
L702
C702
Q983
*4
.22
2SA562TM/Y/-T
V3.3A3
VrefP_Sdac
CONT
R792
L703
33
1/2W
*4
CH
VrefN_Sdac
PW
C704
C790
.1
27p
VrefP_Sdac
8V
VrefN_Sdac
A_VCC
C705
VrefP_Sdac
A_GND
7p
CH
XtalIn
5V
C706
5V
7p
CH
12V
XtalOut
L717
X701
*4
QAX0799-001Z
3.3V
VssA1
GND
R756
NECK
NECK
10K
NECK
H_DRIVE
L718
CONT
*4
HFB
CONT
C785
2.2
C784
ABL
X
V5P1
C707
EW
C709
.1
.01
MC
Ph2
P_ON/OFF
C710
R701
6800p
12K
MC
VDRA+
Ph1
C708
C711
VDRB-
100/16
2.2/50
Gnd1
MAIN MICRO COMPUTER/TELETEXT DECODE/
PROTECT
V12A
C712
.22
TF
SecPll
IF VIDEO RGB SYNC DEF. PROCESS
C713
10/50
4.5/OTHER
Dec8G
C714
.022
MC
3.58/OTHER
EW
R702
100
EW
C715
.001
MC
SF102
VDRB-
R703
100
VDRB-
QAX0723-001
C716
.001
MC
C106
VDRA+
VDRA+
.01
C110
R704
MC
.1
100
Vif1
Y008
0
Vif2
C717
X
TF
Vsc
SF101
C718
R107
X
.15
X
Iref
D101
R705
X
39K
GndIF
C107
X
Sif1
Sif2
C719
.01
MC
R706
220
Y004
AGC
Y003
X
X
C720
.001
MC
EHT
R707
22K
C105
X
R708
10K
R709
1M
D701
*3
G
Q001
X
D
S
SDA1
G
Y005
0
X
D
S
SCL1
Y006
0
Y701
X
C722
X
L651
X
CF702
CF701
X
X
C665
X
R651
X
R654
R653
X
X
IC651
X
D651
R652
C651
X
X
X
Y101
QUY160-150Y
QUY160-075Y
Y102
QQR1114-001Z
X
Y103
X
QQR1114-001Z
Y106
QUY160-150Y
X
Y107
X
QUY160-150Y
GND
GND
GND
GND
POWER
LED (RED)
D808
LH22440-T16
X
R822
1K
S805
S804
S803
S802
S801
.1
QSW0619-003Z
QSW0619-003Z
QSW0619-003Z
QSW0619-003Z
QSW0619-003Z
R824
R823
470
47
1/2W
R821
R820
R819
R818
470
330
220
180
CN10A
CN00A
R753
R755
1.2K
1.2K
R739
0
V1.8ADC
C766
C765
.22
100/16
VssADC
C764
.1
V3.3A2
V1.8A
C763
.22
GndA
C761
.1
RefAd
V3.3RefAdP
C760
.22
IC701
RefAdN
V3.3A1
C758
.22
Bout
R734
100
Gout
Rout
C757
560p
BLKIN
CH
BCL
MC
C756
.1
V5P3
Gnd3
C779
C753
10/50
.1
B3/Pb
C752
.1
G3/Y
C751
.1
R3/Pr
INSSW3
R782
1.2K
NC
R729
X
Uout/INSSW2
Yout
C780
.1
Ysync
C750
.1
Yin/G2/Y
C749
.1
Uin/B2/Pb
C748
.1
Vin/R2/Pr
V5Comb
C746
.1
VssComb
R728
Hout
FbiSo
R726
27K
SVM
R724
R778
D710
LC701
X
*8
Y703
X
Y702
X
R766
X
Q701
X
R767
X
C662
10/50
R663
C657
X
X
N
C660
R664
X
X
N
C658
D603
X
*3
R655
R656
IC651
X
X
X
C607
220/16
R659
C654
C653
X
X
X
C608
220/16
C659
X
Y704
QUY160-075Y
Y708
X
C652
X
Y709
R658
BW
X
R657
X
Y711
QUY160-150Y
Y713
CP
X
!
CP650
Y714
BW
ICP-N25-T
Y716
X
K102
Y719
0
K104
Y720
X
K105
Y721
X
K106
Y722
C773
QUY160-150Y
.1
K107
Y811
X
C112
Y812
0
X
GND
GND
(No.YA275)2-9
2-10(No.YA275)
MAIN PWB ASS'Y(4/4)
(CRT SOCKET)
CN10T
VIDEO-3
CN00T
QJL001-065631
INPUT
J806
QNN0281-003
J807
J808
QNN0281-002
QNN0282-001
J809
R817
QNS0155-001
X
C825
C826
K801
NCB31HK-152X
NCB31HK-152X
R630
X
R632
D814
270
270
*8
1/2W
1/2W
R631
R633
R626
R629
1K
1K
0
0
R627
R628
LC805
QQR1199-002
X
X
D341
MA8033/H/-X
C615
C616
1000/25
1000/25
D342
MA8033/H/-X
D343
MA8033/H/-X
R344
R961
Q341
22
1.8K
V12A
*2
D349
D344
MA8120/M/-X
D345
X
*3
R342
C341
X
220/16
L304
X
R320
X301
X
R321
C318
X
X
R319
X
X
CH
C302
C316
X
X
C303
CH
IC301
CVBSO/PIP
R307
C315
X
X
X
X
R318
CH
Q307
X
R308
C342
C314
X
X
X
X
R309
C313
X
X
R310
CVBSO/PIP_GND
X
C312
R312
X
X
Q305
X
MC
L711
Q306
C304
C311
*4
X
X
X
L303
MC
X
3.3V
R314
L710
C305
C310
X
*4
X
X
MC
C309
L302
L709
*4
X
X
Y715
C306
QUY160-100Y
MC
X
C762
C307
100/16
MC
X
L708
C308
*4
MC
X
L707
*4
C759
K301
100/16
X
R735
100
L301
Y822
X
R733
X
Y_GND
100
R732
1K
Y824
QUY160-200Y
SCL1
R731
D708
*3
SDA1
1K
NECK
L706
*4
C755
10/50
C754
.1
D753
*8
V2/Y
Y705
0
PR_GND
Y821
D751
Y706
QUY160-050Y
*8
0
C747
L716
10/50
*4
100
R727
560
R725
X
Q702
X
X
X
IC601
AUDIO AMP
R722
R723
AN5277
X
X
D602
X
R617
C605
X
R601
.22
0
A_R
R637
5.6K
R662
X
C606
R638
X
.22
R602
0
R639
5.6K
D610
*3
R607
2.2
1/2W
D607
*3
R611
10K
Q601
*2
Q602
*2
R649
R608
R609
1K
X
27K
R610
C609
100K
33/50
D608
D609
x
x
C661
R623
R620
10/50
33K
10K
R621
2.2K
R622
Q607
10K
*1
Q608
*1
C613
R616
R624
10/50
C617
X
68K
x
CN00S
SPEAKER
QGA2501C5-04Z
R816
75
C1_GND
C1
S_V_DET
Y801
R801
Y819
X
75
X
LC801
QQR1199-002
C
Y1/CVBS1
Y_GND
S1
Y802
Y717
X
QUY160-075Y
D817
VIDEO-1
*8
V1
5V
S-VIDEO
INPUT
VDO_DET
J801
QNZ0454-002
R802
0
L1
L1
Y818
C821
0
NCB31HK-152X
R1
R1
R803
C822
0
NCB31HK-152X
GND
Y817
0
D810
R804
Y803
X
*8
75
LC802
V2/Y
QQR1199-002
V
V2/Y_GND
Y
Y804
X
Y816
Y805
X
X
R805
U
LC803
PB
QQR1199-002
75
J802
QNN0349-002
PB_GND
VIDEO-2
Y806
X
D811
*8
COMPONENT
Y807
X
Y825
LC804
BW
QQR1199-002
VIDEO
PR
PR_GND
R806
INPUT
75
Y808
X
D812
*8
L2
C823
J803
NCB31HK-152X
QNN0348-001
R2
PB
GND
C824
NCB31HK-152X
PR
BASS
J805
X
OPEN
A_GND
5V
R807
100
C804
R808
1/2W
470/16
X
R809
0
V_OUT
R815
75
D813
J804
Q801
*8
QNN0349-001
KTA1267/YG/-T
C809
X
L_OUT
GND
R811
OUTPUT
C802
82K
R_OUT
10/50
D805
X
C803
R812
390
10/50
R813
82K
D806
X
Q803
*6
Q805
*2
CS21187
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