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REV # 7 7/17/91 ECO #391 AND ECO #394 NO CHANGES ON THIS SHEET ECO #412 AND ECO #413 NO CHANGES ON THIS SHEET ECO #415 NO CHANGES ON THIS SHEET

DATE

REVISION

NOTES: 1) ALL DIODES IN4148 UNLESS MARKED. 2) R99 IS MOUNTED TO CHASSIS, NOT CIRCUIT BOARD. LEAD WIRES SOLDER INTO CIRCUIT BOARD OR CONNECT TO BOARD VIA MTA HEADER AT R99A AND R99B.
8,9 8/30/91 10 9/6/91

701-0059

XFMR HV WHITE

J10
1 2 1

1 1

INV_HOT

J5 INVACBLK 701-0013
UTIL_HOT 1 R100 82ohm 701-0013
1 2 1 2

1

R98 200K 20ohm
2 1

R99 D25 1N4005
2
2

1

D26 1N4005

J7 ACOUTBLK
R95
2 4 721-0003

12UNFILT
2
2

L1
2

IC8
2 25uH
2 1 1

V130LA2
MOV1 1 1

1 1

J1 LAMP HOT
47K MOV5 V300LA20
1 1

1

R76 C38 1uF
1

2

2

6 5 4

1 2
1 2

Q22 1 IRF743 Q21 3 PN2222 D27 1N4005 C37 .47uF
2 2

2 3

312-4N25

D28 1N4005 MOV2 V300LA20

470ohm Q14 PN2907

R96 47K

2

3

721-0003

3

J1 LAMP NEUTRAL
1 701-0013
1

701-0059

L2
2 1

XFMR HV BLUE CENTER TAP 25uH

J16

1

J8 ACOUTWHT
C40 4.7nF

701-0059

XFMR HV BLACK

J9
R29 2.26K 3.01K 3.83K +5 +12 2.67K 2K 1K 4.99K 4.7K 3.01K 0.1uF .047uF .047uF R34 R40 C11

1

250VA 400VA 600VA

2

1
701-0059

J6 INVACWHT
1
701-0059

1

R40
2 2

1

R43 4.7K

J12
1

XFMR LV

1
1 2

R41
2 1 1 2

R42 D12 150K
3 2
1 2

J13
701-0059

XFMR LV

IFDFWRD 150K C13 .1uF D11 Q8 PN2222
1 2
1

D41

D36
2 2 1

1

1

2 1

R31 1
2 1

2

R32 1 15K DELETE ON 250,400
2

15K

2 2

CHANGE C13 TO .22uF ON 600
DELETE ON 250

20ohm R117 470ohm

Q30 PN2907 DELETE ON 250
1

C12

3

R116

22uF

DELETE ON 250,400

1 1

R30
2 2

1

ISENSE 20K R34
1 3 2 2 1

1

2

2

2

R118 43.2K
2

2

R29 R37 47ohm

C11

Q36 IRFZ42

Q6 IRFZ42
1

Q5 IRFZ42
1 3

Q4 IRFZ42
1 3

3 2

Q1 IRFZ42 Q31 PN2222
3 1 1 1

Q2 IRFZ42
1 3

2

Q3 IRFZ42
1 3

2

Q37 IRFZ42
3

2

2

1

1

1

1

1

1

CLAMP
3 2 2 2 1

R119 1.00K R147 47ohm
2

R145 Q35 200K R146 100K

R8 47ohm
2

R7 47ohm
2

R6 47ohm
2

2

R1 47ohm
2

R2 47ohm
2 1

2

R3 47ohm

R148 47ohm

+12
1

1 PN2222

D38
1 2 1

D37
2

PUSHPL1 +12
14 2 CD4001 350-4001 IC2 12 5 11 13 CD4001 350-4001 IC2 6 14

C39 .01uF
4

1

XFMRLVCT

1

R65

2

2

1

D19

49.9K

1

R66

2

1

R67

2

ACFAIL

49.9K

1

10K

C24 .1uF +12
1 3 2 CD4001 350-4001 IC2 14

AMERICAN POWER CONVERSION
DESCRIPTION SHEET

2

SB208 CIRCUIT BOARD SCHEMATIC
PRODUCT APCC PART #

C
250/400/600 INT'L BACK-UPS
DATE BY SCALE

INVDISBL

PUSHPL2

0S-208
DWG REV

3/22/91

ESM

E208-10

10