4 QSC Audio Products, LLC
TD-000163-00 Rev. B
Tools and resources you will need ................................................................................................................................................................................................................. 21
Procedure ...................................................................................................................................................................................................................................................... 21
5. Servicing ISA amplifiers ......................................................................................................................................................23
5.1 Mechanical disassembly and re-assembly ............................................................................................................................................... 23
Removing the channel modules .................................................................................................................................................................................................................... 23
Removing the AC board ................................................................................................................................................................................................................................ 23
6. Replacement parts ................................................................................................................................................................24
6.1 ISA280 parts and assemblies .......................................................................................................................................................................... 24
ISA280 Power Amplifier ................................................................................................................................................................................................................................ 24
Chassis Assembly ISA280 (beginning June 2006) ........................................................................................................................................................................................ 24
Chassis Assembly ISA280 (before June 2006) ............................................................................................................................................................................................. 25
Main PCB Assembly ISA280 ......................................................................................................................................................................................................................... 26
PCB Assembly, AC/Input ISA280, 300Ti, 300T, 450, 500Ti, & 500T .............................................................................................................................................................. 28
6.2 ISA300T parts and assemblies ........................................................................................................................................................................ 30
ISA 300T Power Amplifier ............................................................................................................................................................................................................................. 30
Chassis Assembly ISA300T ........................................................................................................................................................................................................................... 30
Main PCB Assembly ISA300T ....................................................................................................................................................................................................................... 31
PCB Assembly, AC/Input ISA280 300Ti, 300T, 450, 500Ti, & 500T ............................................................................................................................................................... 33
6.3 ISA300Ti parts and assemblies ....................................................................................................................................................................... 34
ISA300Ti Power Amplifier .............................................................................................................................................................................................................................. 34
Chassis Assembly ISA300Ti (beginning June 2006) ...................................................................................................................................................................................... 34
Chassis Assembly ISA300Ti (before June 2006) ........................................................................................................................................................................................... 35
Main PCB Assembly ISA300Ti ...................................................................................................................................................................................................................... 36
PCB Assembly, AC/Input ISA280, 300Ti, 300T, 450, 500Ti, & 500T .............................................................................................................................................................. 38
6.4 ISA450 parts and assemblies .......................................................................................................................................................................... 39
ISA450 Power Amplifier ................................................................................................................................................................................................................................ 39
Chassis Assembly ISA450 (beginning June 2006) ........................................................................................................................................................................................ 39
Chassis Assembly ISA450 (before May 2006) .............................................................................................................................................................................................. 40
Main PCB Assembly ISA450 ......................................................................................................................................................................................................................... 41
PCB Assembly, AC/Input ISA280, 300Ti, 300T, 450, 500Ti, & 500T .............................................................................................................................................................. 43
6.5 ISA500T parts and assemblies ........................................................................................................................................................................ 44
ISA 500T Power Amplifier ............................................................................................................................................................................................................................. 44
Chassis Assembly ISA 500T .......................................................................................................................................................................................................................... 44
Main PCB Assembly ISA 500T ...................................................................................................................................................................................................................... 45
PCB Assembly, AC/Input ISA280, 300Ti, 300T, 450, 500Ti, & 500T .............................................................................................................................................................. 47
6.6 ISA500Ti parts and assemblies ....................................................................................................................................................................... 48
ISA500Ti Power Amplifier .............................................................................................................................................................................................................................. 48
Chassis Assembly ISA500Ti ........................................................................................................................................................................................................................... 48
Main PCB Assembly ISA500Ti ...................................................................................................................................................................................................................... 49
PCB Assembly, AC/Input ISA280, 300Ti, 300T, 450, 500Ti, & 500T .............................................................................................................................................................. 51
6.7 ISA750 parts and assemblies .......................................................................................................................................................................... 52
ISA750 Power Amplifier ................................................................................................................................................................................................................................ 52
Chassis Assembly ISA750 (beginning May 2006) ......................................................................................................................................................................................... 52
Chassis Assembly ISA750 (before May 2006) .............................................................................................................................................................................................. 53
Main PCB Assembly ISA750 ......................................................................................................................................................................................................................... 54
PCB Assembly, AC/Input ISA750, 800Ti, & 800T .......................................................................................................................................................................................... 56
6.8 ISA800T parts and assemblies ........................................................................................................................................................................ 58
ISA800T Power Amplifier .............................................................................................................................................................................................................................. 58
Chassis Assembly ISA800T ........................................................................................................................................................................................................................... 58
Main PCB Assembly ISA800T ....................................................................................................................................................................................................................... 59
PCB Assembly, AC/Input ISA750, 800Ti, & 800T .......................................................................................................................................................................................... 61
6.9 ISA800Ti parts and assemblies ....................................................................................................................................................................... 62
ISA800Ti Power Amplifier .............................................................................................................................................................................................................................. 62
Chassis Assembly ISA800Ti ........................................................................................................................................................................................................................... 62
Main PCB Assembly ISA800Ti ...................................................................................................................................................................................................................... 63
PCB Assembly, AC/Input ISA750, 800Ti, & 800T .......................................................................................................................................................................................... 65
6.10 ISA1350 parts and assemblies ...................................................................................................................................................................... 66
ISA1350 Power Amplifier .............................................................................................................................................................................................................................. 66
Chassis Assembly ISA1350 (beginning May 2006) ....................................................................................................................................................................................... 66
Chassis Assembly ISA1350 (before May 2006) ............................................................................................................................................................................................ 66
Main PCB Assembly ISA1350 ....................................................................................................................................................................................................................... 66
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