Crown Audio service manual IQ-USM 810 Modules, Schematic Diagrams

130447-1 Rev. A

7 Module and Schematic Information

7.1 General Information

The schematics referenced and provided are repre- sentative only. There may be slight variations between component to component. These schematics are in- tended to be used for troubleshooting purposes only.

Note on circuit board designations: Crown circuit boards are referenced with a PWA and/or PWB part number. PWA stands for Printed Wire Assembly. This is the com- pleted circuit board with all components assembled. PWB stands for Printed Wire Board. This is the circuit board only, without components.

7.2 IQ-USM 810 Modules

7.2.1Front Panel Display PWA:

126747-3

Display PWA on 126746-3 PWB.

7.2.2System Controller PWA:

128045-1

System Controller PWA on 126346-5 PWB. Use 126451-3 as service replacement.

126451-3

System Controller PWA on 126346-5 PWB. Replaced 128045-1.

7.2.3SHARC PWA:

128047-3

SHARC PWA on 126743-4 PWB. Use 126744-3 as service replacement.

128047-4

SHARC PWA on 126743-4 PWB. Replaced 128047-3. Use 126744-3 as service replacement.

126744-3

SHARC PWA on 126743-4 PWB.

7.2.4Input PWA:

128049-1

Input PWA on 126689-3 PWB. Use 126690-3 as ser- vice replacement.

IQ-USM 810 Service Manual

126690-3

Input PWA on 126689-3 PWB.

7.2.5Output PWA:

128051-3

Output PWA on 126692-4 PWB. Use 126692-4 as ser- vice replacement.

126693-4

Output PWA on 126692-4 PWB.

7.3 Schematic Diagrams:

7.3.1Front Panel Display PWA

126745 Rev. A

Use for 126747-3 PWA.

7.3.2System Controller PWA

126323 Rev. A

Use for 128045-1 PWA.

126451-3 Rev. A

Use for 126451-3 PWA.

7.3.3SHARC PWA

126742 Rev. C

Use for 128047-3 PWA.

126742 Rev. D

Use for 128047-4 PWA.

126744-3 Rev. A

Use for 126744-3 PWA.

7.3.4Input PWA

126688 Rev. A

Use for 128049-1 PWA.

126690-3 Rev. A

Use for 126690-3 PWA.

7.3.5Output PWA

126691 Rev. C

Use for 128051-3 PWA.

126693-4 Rev. A

Use for 126693-4 PWA.

©2000 Crown International, Inc.

Module and Schematic Information 7-1