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Module and Schematic Information 7-1
130447-1 Rev. A
IQ-USM 810 Service Manual
©2000 Crown International, Inc.
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
7.2.1 Front Panel Display PWA:
126747-3
Display PWA on 126746-3 PWB.
7.2.2 System 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.
7.2.3 SHARC 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.
7.2.4 Input PWA:
128049-1
Input PWA on 126689-3 PWB. Use 126690-3 as ser-
vice replacement.
126690-3
Input PWA on 126689-3 PWB.
7.2.5 Output 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:
7.3.1 Front Panel Display PWA
126745 Rev. A
Use for 126747-3 PWA.
7.3.2 System Controller PWA
126323 Rev. A
Use for 128045-1 PWA.
126451-3 Rev. A
Use for 126451-3 PWA.
7.3.3 SHARC 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.
7.3.4 Input PWA
126688 Rev. A
Use for 128049-1 PWA.
126690-3 Rev. A
Use for 126690-3 PWA.
7.3.5 Output PWA
126691 Rev. C
Use for 128051-3 PWA.
126693-4 Rev. A
Use for 126693-4 PWA.
7 Module and Schematic
Information