JBL A6000GTi, Руководство по обслуживанию

Страница: 35 / 62

137159-1 Rev. 1 A6000GTi Service Manual

2003 Crown Audio, Inc.
Parts 5-2
5.4. Circuit Board Parts
This section includes electrical parts lists for this product. All serviceable parts and
assemblies will have a Crown Part Number (CPN) listed in this section. The parts listed
are current as of the date printed. Crown reserves the right to modify and improve its
products for the benefit of its customers. Please note: where reference designations are
listed as “installed on next assembly,” the CPN for the associated part may be found in
Section 5.3 Mechanical Parts.
5.4.1. Circuit Board and Schematic Part Numbers
The schematics referenced and provided are representative only. There may be slight
variations from amplifier to amplifier. These schematics are intended 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.
A6000GTi Power Supply
PWA Number: 134174-1 (REV. 6) PWA, A6000GTI SW M PWR CONV
Has a flyback low voltage power supply.
PWA Number: 134174-1 (REV. 7) PWA, A6000GTI SW M PWR CONV
Push-pull low voltage power supply on daughter board mounted where the flyback
supply used to be. Changes made from REV 7 to REV A- fuse changed from 400A
to 600A, added C112 100uF cap to current sense/limit circuit and changed R17 to
7.87K.
PWA Number: 134174-1 (REV. A) PWA, A6000GTI SW M PWR CONV
Changed Q50 and Q54 to 135698-1. Changed R7 to A11368-18241. Changed
R19 to A11368-18241. Changed U8 to 136840-1. Changed RT3 to open.
PWA Number: 134174-1 (REV. B) PWA, A6000GTI SW M PWR CONV
Correct a wrong part number on the document. (Document change only)
A6000GTi Main
PWA Number: 134258-1(REV. A) PWA, A6000GTI MAIN
A6000GTI FRONT END (2 PER AMP)
PWA Number: 134254-1(REV. A) PWA, A6000GTI FRONT END
Initial Release
PWA Number: 134254-1(REV. B) PWA, A6000GTI FRONT END
Changed Q500, Q505, Q507 and Q508 to C7448-1. Changed Q501, Q504, Q506
and Q509 to 125798-1.