Fender PRINCETON 112 PLUS - User Manual

PRINCETON 112 PLUS
p/n 022-6704-010 (120V)
SERVICE MANUAL
CONTENTS:
Notices
Specifications
Therory of operation
Parts lists:
PCB Assembly
Chassis assembly
Footswitch assembly
Cabinet assembly
Miscellaneous
Schematics
Service diagram
Fender Musical Instruments Corp.7975 North Hayden Road Scottsdale, AZ 85258
PRINCETON 112 PLUS
(This is the model name for warranty claims)
APRIL 1995 REV A
IMPORTANT NOTICE:
The information contained herein is CONFIDENTIAL and PROPRIETARY to Fender Musical Instruments Corp. It is
disclosed solely for use by qualified technicians for purposes of equipment maintenance and service. It is not to be
disclosed to others without the expressed permission of Fender Musical Instruments Co. All specifications subject to
change without notice.
For warranty repair service, only Fender specified part numbers are to be used. It is recommended they also be
used for post-warranty maintenance and repair.
Parts marked with an asterick (
*
) indicate the required use of that specific part. This is necessary for RELIABILITY
and SAFETY requirements. DO NOT USE A SUBSTITUTE!
A coded naming convention is used in the description of certain parts. The codes and what they mean are as
follows:
CAPACITOR CODES HARDWARE CODES
CAP AE = Aluminum Electrolytic BLX = Black Oxide
CAP CA = Ceramic Axial CR = Chrome Plated
CAP CD = Ceramic Disk HWH = Hex Washer Head
CAP MPF = Metalized Polyester Film M = Machine Screw
CAP MY = Mylar NI = Nickel Plated
CAP PFF = Polyester Film/Foil OHP = Oval Head Phillips
PB = Particle Board
RESISTOR CODES
PHP = Pan Head Phillips
PHPS = Pan Head Phillips Sems
RES CC = Carbon Comp SMA = Sheet Metal "A" Point
RES CF = Carbon Film SMB = Sheet Metal "B" Point
RES FP = Flame Proof SS = Stainless Steel
RES MF = Metal Film TF = Thread Forming
RES WW = Wire Wound ZI = Zinc Plated
1

Summary

Important Notice

Specifications

Theory of Operation

Preamp Description

Details the input jack, CMOS switch inhibit function, and the first stage of the amplifier.

Channel and Reverb Switching

Explains how AC voltage from the transformer controls channel switching and indicator LEDs.

Power Amplifier Operation

Describes the high voltage op-amp, protection diodes, and bias circuit for the output transistors.

Parts Lists

Schematic Diagram

Service Diagram

Fender PRINCETON 112 PLUS Specifications

General

Power Output	65 Watts
Channels	2 (Normal and Drive)
Effects	Reverb
Type	Solid State
Speaker	12-inch Fender Special Design
Controls	Volume, Treble, Bass, Reverb, Gain, Drive
Inputs	1 x 1/4"
Outputs	1 x External Speaker
Footswitch	Optional
Dimensions	9.5"