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10.3. P-Board Block Diagram
P
POWER SUPPLY
TO
AC CORD
P9
F402
L404
L405
LIVE
4
F401
NEWTRAL
1
D401
D404
D462
R903-R906
Q423
R928-R931
Q424,Q434.Q436
Q435
DC-DC CONVERTER
R455,R474
R479,R481
R483,R488
Q433,Q441
Q430,Q432
Q415
Q414
MD-42M8 SERIES
P-Board Block Diagram
D417
350V
D419
D420
10
9
8
4
3
2
T401
Q404
Q406
L402
14
16
D415
Q401
8
7
6
5
VCC
IC406
MOS
CURR
DRIVE
DET
POWER
CURR
FACTOR
COMP
CONTROL
L403
1
2
3
4
Q420
Q422
Q407
HOT
Q418
Q421
R443
PFC
IC402
COMPARATOR
1
5
3
4
Q417
IC411
COMPARATOR
Q4O3
1
5
RL403
RL402
3
4
T410
15
9
16
PR501
18
D511
Q511
Q512
Q431
D509
IC407
6
14
Q439
13
3
D510
1
2
10
D444
3
2
1
IC408
IC504
4
1
4
5
7
8
PHOTO
STB 5V
COUPLER
3
2
2
REG
1
Q440
IC412
4
1
Q438
PHOTO
COUPLER
3
2
IC409
4
1
PHOTO
COUPLER
3
2
HOT
COLD
HOT
COLD
13
14
PR401
T404
D531
1
Q412
9
3
2
Q408
4
15
7
8
11
6
PR402
Q413
5
Q409
2
1
10
9
6
5
C405
T402
2
3
4
T407
6
5
4
D568
D530
16
15
13
12
IC520
Ex.I/O
2
4
6
Q516
Q510
COLD
1
4
IC404
Q520,Q517
PHOTO
2
3
COUPLER
1
4
IC509
Q507
IC403
Q506
AC-DC CONVERTER
PHOTO
2
3
COUPLER
9
6
8
7
5
VCC
GD
ZCD
5
4
INV
VFF
CB
4
1
IC401
1
3
4
PHOTO
3
2
COUPLER
PHOTO
IC505
R671
COUPLER
4
Csus
3
IC501
POWER MCA
D567
1
P30
24
Q561
VDD
2
P31
23
Q559
VSS
3
IC502
P00
3
22
X501
XIN
1
4NHz
4
P01
21
RESET
XOUT
5
P02
20
P03
6
RESET
19
D555
Q535
7
P10
18
P21
8
P20
P11
17
Q501
9
D5
P12
16
P13
Q550
10
D4
15
11
D3
D0
14
Q551
Q502
Q503
12
D2
D1
13
Q560
Q565
Q567
Q564
Q562
33
D539
Q527
D532
D542
D544
D545
2
1
D534
D536
3
IC512
AVR DC75V
1
R665
2
Vda
3
DC15V
D535
DC12V
PR509
D521
1
R661
Q509
2
Vlow
Q541
3
Q508
PR601
T601
IC506
Q505
SHUNT REGULATOR
3
3
REG
1
R628
Vsus
1
Q530
Q536
Q525
2
Q552
Q537
Q538
Q557
PR503
IC507
Q544
Q554
1
REG
5
Q553
REGULATOR
Q518
Q519
Q558
IC503
2
1
STB 14V
MD-42M8 SERIES
P-Board Block Diagram
MD-42M8 SERIES
TO
P12
SS12
DC75V
1
Vda
2
+15V
5
STB12V
STB_PS
4
TO
P23
SC23
1
+15V
2
+15V
TO
P11
SS11
2
Vsus
3
Vsus
TO
P2
SC2
1
Vsus
2
Vsus
TO
P5
PB5
1
+12V
2
+12V
4
+15V
6
+12Vs
7
+12Vs
8
+12Vs
NO
P30
USE
1
+15V
4
+5V
5
FAN CONT
3
FAN SOS
TO
P25
D25
1
12V
2
12V
3
FAN CONT
7
+5V
+5V
9
STB5V
10
13
F STBY ON
14
FAN SOS
15
ECO_ON
17
PANEL MAIN ON
PS SOS
16
18
ALL OFF
TO
P10
PA10
F STB 14V
1
2
F STB 14V
3
F STB 14V
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