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POWER P.C.B. MAIN P.C.B.
IC1400
(DC/DC CONVERTER)
D+1.5V P1102 P1501
1 VIN VOUT 8 D+1.5V A
12,13
ON/OFF GND
POWER ON H P1102 P1501
2 5 B
11
T1150 X SW+3.8V P1102 P1501
C
POWER Q1700 14
SWITCHING (REG.X SW+3.8V)
VA1110,L1120,L1121 D1140,C1143 TRANSFORMER
QR1301 1
AC INLET (POWER ON H :ON)
P1101 F1101 D1270 S D
250V2A SURGE 4 FET 2
RECTIFIER
SUPPRESSOR 1 G
P1 S2D
AND 7 18 2 X SW+12.4V IC1701 5
SURGE 3 (DC/DC CONVERTER)
ABSORBER 6
S2C Current 8
17 1 Vin Sense 3
FET
Gate 7
S2B Drive
16
IC1150
(SWITCHING IC) 2 PW
ON GND 6
Q1600
S2A (REG.X SW+5.8V)
X SW+12.4V
15
VIN 7
X SW+5.8V P1102 P1501
1 D
P2 2,3
2 F/B 9 5
S1A S D
14 4 FET 2
5 G
Z/C GND VCC IC1601 5
1 3 4 (DC/DC CONVERTER)
S1B
13 IP1601 6
2 1 1 Vin Current 8 3
V2 Sense
3
S1C
12 FET
Gate 7
Drive
QR1800,QR1801
V1 S1D
2 11 SWITCHING 2 PW
ON GND 6
Q1400
(REG.DR+5V)
HDD PFAIL L P1102 P1501 HDD PFAIL L TO
1 TIMER
22 IC7501- 47 SECTION
S D
4 FET 2
G 5 4
IC1401 5 VCC VOUT
(DC/DC CONVERTER)
IP1401 6
Current 8
- IC1501
2 1 1 Vin Sense 3 + (HDD PFAIL L OUT)
Vref
FET
Gate 7
Drive
2 3
2 PW
ON GND 6
DR P ON H P1102 P1501 DR P ON H FROM
TIMER
15 IC7501- 49 SECTION
QR1303
(POWER ON/OFF
CONTROL SW.) DR+12V P1103
QR1302
( H :ON) 1 TO
DR+5V P1103 HDD
Q1200 Q1270 4
(FEED BACK) (DR+12V OUT)
DR+5V P1102 P1501
4 1 1
20,21 TO
S D DR+12V P1102 P1501 DVD-RAM/R DRIVE
2 FET 5
16,17
3 2 G
3 6
7
2 8
1 3 4
IC1200
(ERROR VOLTAGE DET.) QR1304
( H :ON) IP1501
X SW+12.4V P1102 P1501
1 2 E
4,5
HOT COLD
DMR-EH50EB/EG/EP,EH52EG
Power Supply Block Diagram