Module And Schematic Information; Main Pwas; Input Pwa; Schematic Diagrams - Crown CE-1000A Service Manual

7 Module and Schematic
Information
7.1 General Information
Since the introduction of the CE series family of am-
plifiers there have been several updates and revisions.
Many of these changes called for new modules. The
following pages list all modules used as of the print-
ing of this manual, along with suggested service re-
placements for obsolete modules where applicable.
Call the Crown Technical Support Group if you re-
quire a parts list or schematic for a module not in-
cluded in this manual.
The schematics referenced and provided are repre-
sentative only. There may be slight variations between
amplifier to amplifier. These schematics are intended
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 completed circuit board with all components
assembled. PWB stands for Printed Wire Board. This
is the circuit board only, without components.
7.2 CE-1000, UT-1010, M-120, S2

7.2.1 Main PWAs:

102139-5
Main PWA built on 102138-5 PWB. Used only in early
CE-1000. Use 127451-4 as service replacement.
102139-6
Main PWA built on 102138-6 PWB. Replaced 102139-
5. Use 127451-4 as service replacement.
102139-8
Main PWA built on 102138-8 PWB. Replaced 102138-
6. First main module with sensitivity switch. Use 127451-
4 as service replacement.
102139-9
Main PWA built on 102138-9 PWB. Used only in export
models. Added 0.775V sensitivity. Use 127451-4 as
service replacement.
102139-11
Main PWA built on 102138-9 PWB. Used only in export
models. Includes bootstrap update. Use 127451-4 as
service replacement.

Module and Schematic Information 7-1

CE Series Service Manual
127451-4
Special service replacement PWA. Used as replace-
ment for all PWAs. Comes with other assortment of parts
which may need to be replaced in the amplifier depend-
ing on version of original main PWA. (refer to instruction
sheet shipped with PWA).
127353-1
Main PWA built on 102138-9 PWB. Added 0.775V sen-
sitivity. Use 127451-4 as service replacement.
127353-2
Main PWA built on 102138-9 PWB. Includes bootstrap
update. Use 127451-4 as service replacement.

7.2.2 Input PWA:

102689
Original input PWA built on 102688 PWB. Included sen-
sitivity switch.
126883
Input PWA built on 127004 PWB. Used with main PWAs
starting with 102139-8.Sensitivity switch was removed,
and moved to the main PWA. Use 127049-1 as service
replacement, which is PWA 126883 with new faceplate.

7.2.3 Schematic Diagrams

Main PWA
For main PWAs 102139-5 or 102139-6 refer to sche-
matic 102141 F.
For main PWA 102139-8 refer to schematic 102141 J.
For main PWA 102139-9 refer to schematic 102141 L.
For main PWA 127321-1 refer to schematic 102141 M.
For main PWAs 127353-1 or 127353-2 refer to sche-
matic 102141 M.
Input Module
For input PWA 102689 refer to schematic 102567.
For input PWA 126883 refer to schematic 127014.
7.3 CE-1000A
7.3.1 Main/Input PWA:
127451-4
Main/input PWA built on 127450-1 PWB.
Rev. D