QSC ISA280 - Page 128

126 QSC Audio Products, LLC
TD-000163-00 Rev. B
A 4 SH–008001–00
REV
SH
DWG NO.
MAINTAIN FULL
PRI-SEC CREEPAGE
MUTING AND THERMAL PROTECTION
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATIONTHAT IS THE PROPERTY
OF QSC AUDIO PRODUCTS, WHICH MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
A
B
C
D
A
B
C
D
87 6543 21
87 6543 21
NOTES: UNLESS OTHERWISE SPECIFIED
PLOT DATE:
Wed Sep 05, 2001
SCALE:
NONE
SIZE
D
FSCM NO. DWG NO.
SHEET 4 OF 4
SH–008001–00
CAD FILE NO:
SH8001ra.sch
REV
A
R21 & R21A:
SEE TABLE 2
FOR VALUES
CIRCUIT BREAKER:
SEE TABLE 2
FOR VALUES
AC POWER
SWITCH
IEC AC INLET
LINE
NEUT
GND
20 VAC TO FAN POWER RECTIFIER
28V PRI-SIDE DC FAN SUPPLY
R4
60°C 100Ω
ATTACH TO CH 2
HEAT SINK.
R7
60°C 100Ω
ATTACH TO CH 1
HEAT SINK.
MAINTAIN FULL
PRI-SEC CREEPAGE
U-I CORE POWER TRANSFORMER
NOTE: SPLIT SECONDARY WIRING
FROM EACH LEG TO EACH CHANNEL
PC–007507–00, AC PCB
J2A THRU J9A: PCB-MOUNTED TABS.
SEE TABLE 1 FOR CONNECTIONS.
COIL ONE
COIL TWO
400V–25A
BR100
BR101
400V–25A
BR200
400V–25A
100V 120V 240V
BRN BRN BRN J4A
GRY GRY — J5A
BLK BLU BLU J6A
——BLKJ8A
——GRYJ9A
WHT RED RED J7A
BLU BLK — J2A
RED W HT WHT J3A
TABLE 1
AC LINE VOLTAGE
POWER TRANSFORMER PRIMARY LEAD COLOR
TAB
100V 120V 240V
CIRCUIT
BREAKER
15A—
125V
15A—
125V
7.5A—
250V
R21
1OHM
30A
1OHM
30A
4OHM
15A
R21A
0OHM
(JUMPER)
0OHM
(JUMPER)
4OHM
15A
AC LINE VOLTAGE
TABLE 2
BR201
400V–25A
ISA 800T
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