QSC ISA280 Technical & Service Manual page 128

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THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION THAT IS THE PROPERTY
OF QSC AUDIO PRODUCTS, WHICH MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
D
PC–007507–00, AC PCB
U-I CORE POWER TRANSFORMER
NOTE: SPLIT SECONDARY WIRING
FROM EACH LEG TO EACH CHANNEL
C
J2A THRU J9A: PCB-MOUNTED TABS.
SEE TABLE 1 FOR CONNECTIONS.
COIL ONE
R21 & R21A:
SEE TABLE 2
COIL TWO
FOR VALUES
AC POWER
SWITCH
B
CIRCUIT BREAKER:
SEE TABLE 2
FOR VALUES
IEC AC INLET
LINE
NEUT
GND
20 VAC TO FAN POWER RECTIFIER
100V
BRN
GRY
BLK
A
WHT
BLU
RED
NOTES: UNLESS OTHERWISE SPECIFIED
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126
6
BR100 400V–25A
BR101
400V–25A
BR200
BR201 400V–25A
400V–25A
MAINTAIN FULL
PRI-SEC CREEPAGE
TABLE 1 TABLE 2
AC LINE VOLTAGE AC LINE VOLTAGE
TAB
120V 240V 100V 120V 240V
CIRCUIT 15A— 15A— 7.5A—
BRN BRN J4A
BREAKER 125V 125V 250V
1 OHM 1 OHM 4 OHM
GRY — J5A R21
30A 30A 15A
0 OHM 0 OHM 4 OHM
R21A
BLU BLU J6A
(JUMPER) (JUMPER) 15A
— — BLK J8A
— — GRY J9A
RED RED J7A
BLK — J2A
WHT WHT J3A
6
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MUTING AND THERMAL PROTECTION
MAINTAIN FULL
PRI-SEC CREEPAGE
R4 R7
60°C 100Ω 60°C 100Ω
ATTACH TO CH 2 ATTACH TO CH 1
HEAT SINK. HEAT SINK.
28V PRI-SIDE DC FAN SUPPLY
ISA 800T
page 3 of 3
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SIZE FSCM NO. DWG NO.
D
SCALE: NONE CAD FILE NO:
3 2 PLOT DATE:
Wed Sep 05, 2001
1
D
C
B
A
REV
SH–008001–00
A
SHEET 4 OF 4
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