Fender CHAMPION 30 DSP User Manual

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
Fender® Musical Instruments Corp. 8860 East Chaparral Road Suite 100 Scottsdale, AZ 85250
p/n 2267300020 (120V)
SERVICE MANUAL
CONTENTS:
Notices .............................. 2
Specifications.................... 3
Service Notes.................... 4
Circuit Description............. 5
Parts Lists:
PCB Assembly............ 6
uDSP Assembly ......... 8
Chassis Assembly ...... 8
End Item Assembly .... 9
Service Diagrams ........... 10

Fender CHAMPION 30 DSP Specifications

General

Power Output	30 Watts
Auxiliary Input	Yes
Headphone Output	Yes
Speaker	1 x 10" Fender Special Design
Channels	2
Inputs	1 x 1/4" Instrument
Outputs	1 x 1/4" (Headphone)
Type	Solid State Combo Amplifier
Controls	Gain, Volume, Treble, Bass

Summary

Important Notice

Specifications

Service Notes

PCB Exchange Policy

Details the policy for replacing circuit boards marked as non-field-replaceable.

Circuit Description

Pre-Amplifier

Describes the signal path from input to the pre-amp stage and its interaction with the DSP card.

Power Amplifier

Details the LM3876 power amp chip, load sense resistor, and mute function.

Power Supply

Explains the bridge rectifiers, zener regulation for +/-15V, and the +5V supply for the uDSP card.

Digital User Interface

Covers how the uDSP card controls the CMOS switch for FX LEVEL and FX SELECT via pots.

Digital Noise

Discusses high-frequency noise from DSP processing that is inaudible and doesn't affect performance.

Main - PCB Assembly

uDSP – PCB Assembly

Chassis Assembly

Lists the components and parts required for the chassis assembly.

End Item Assembly

Schematics and Drawings