QSC ISA280 Technical & Service Manual page 116

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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–004507–00, AC PCB
U-I CORE POWER TRANSFORMER
NOTE: SPLIT SECONDARY WIRING
FROM EACH LEG TO EACH CHANNEL
J2A THRU J9A: PCB-MOUNTED TABS.
SEE TABLE 1 FOR CONNECTIONS.
C
R21 & R21A:
SEE TABLE 2
FOR VALUES
AC POWER
SWITCH
CIRCUIT BREAKER:
SEE TABLE 2
FOR VALUES
IEC AC INLET
LINE
NEUT
GND
20 VAC TO FAN POWER RECTIFIER
B
A
NOTES: UNLESS OTHERWISE SPECIFIED
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114
6
BR100
400V–25A
BR200
400V–25A
MAINTAIN FULL
PRI-SEC CREEPAGE
BR1
200V–1A
TABLE 1 TABLE 2
AC LINE VOLTAGE AC LINE VOLTAGE
TAB
100V 120V 240V 100V 120V 240V
CIRCUIT 15A— 15A— 7.5A—
BRN BRN BRN J4A
BREAKER 125V 125V 250V
1 OHM 1 OHM 2.5 OHM
R21
GRY GRY — J5A
30A 30A 15A
0 OHM 0 OHM 2.5 OHM
R21A
BLK BLU BLU J6A (JUMPER) (JUMPER) 15A
— — BLK J8A
— — GRY J9A
WHT RED RED J7A
BLU BLK — J2A
RED WHT WHT J3A
6
5 4
MUTING AND THERMAL PROTECTION
R4 R7
60C 100 OHM 60C 100 OHM
ATTACH TO CH2 ATTACH TO CH1
HEAT SINK. HEAT SINK.
28V PRI-SIDE DC FAN SUPPLY
ISA 500T
page 3 of 3
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3 2
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–005001–00
A
SHEET 4 OF 4
SH5001ra.sch
1
QSC Audio Products, LLC
TD-000163-00 Rev. B