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Fender SR-6520 Service Manual

Fender SR-6520 Service Manual

Powered mixers w/ digital effects

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SR-6520 / SR-8520 /P / PD
POWERED MIXERS w/ DIGITAL EFFECTS
CONTENTS:
Notices
Specifications
Circuit description
Parts lists:
Preamp PCB assy
Front panel assy
Pwr amp PCB assy
Rear panel assy
Cabinet assembly
Miscellaneous
Dig rev cntrl
Schematics
Service diagram
Fender Musical Instruments Corp.
7975 North Hayden Road Scottsdale, AZ 85258
SR-6520P p/n 071-6521-100 (120V)
SR-8520P p/n 071-8521-100 (120V)
SR-6520PD p/n 071-6521-200 (120V)
SR-8520PD p/n 071-8521-200 (120V)
SERVICE MANUAL
SR-6520P/PD SR-8520P/PD
(These are the model names for warranty claims)
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 asterisk (
) 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
CAP AE
=
Aluminum Electrolytic
CAP CA
=
Ceramic Axial
CAP CD
=
Ceramic Disk
CAP MPF =
Metalized Polyester Film
CAP MY
=
Mylar
CAP PFF
=
Polyester Film/Foil
RESISTOR CODES
RES CC
=
Carbon Comp
RES CF
=
Carbon Film
RES FP
=
Flame Proof
RES MF
=
Metal Film
RES WW
=
Wire Wound
1
MARCH 1998

IMPORTANT NOTICE:

HARDWARE CODES
BLX
=
Black Oxide
CR
=
Chrome Plated
HWH
=
Hex Washer Head
M
=
Machine Screw
NI
=
Nickel Plated
OHP
=
Oval Head Phillips
PB
=
Particle Board
PHP
=
Pan Head Phillips
PHPS
=
Pan Head Phillips Sems
SMA
=
Sheet Metal "A" Point
SMB
=
Sheet Metal "B" Point
SS
=
Stainless Steel
TF
=
Thread Forming
ZI
=
Zinc Plated

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Summary of Contents for Fender SR-6520

  • Page 1: Important Notice

    Fender Musical Instruments Co. All specifications subject to change without notice. CONTENTS: For warranty repair service, only Fender specified part numbers are to be used. It is recommended they also be used Notices for post-warranty maintenance and repair.
  • Page 2: Circuit Description

    CIRCUIT DESCRIPTION SPECIFICATIONS Type: PR 189 POWER AMPLIFIER: The signal from the preamp feeds from P1B pin 4, through a ribbon cable, to P1A on the power amplifier PCB. The signal couples (via C1) to the unity gain amplifier U1B. U1B contains a closed loop (gain of POWER AMPLIFIER SECTION: 1) negative feedback path, along with positive feedback through the inverting Operational Transconductance Amplifier (OTA) U2.
  • Page 3: Parts List

    CIRCUIT DESCRIPTION Cont. PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY Q7 & Q11 make up a voltage amplification stage. Again, to operate properly, the same amount of current must flow NOTICE: through these transistors. Thus the voltage drop across R21 & R22 must be the same. Reference designators 100-199 refer to and are listed only for channel 1.
  • Page 4 PARTS LIST PARTS LIST PREAMP PREAMP PRINTED CIRCUIT BOARD ASSEMBLY (CONT) PRINTED CIRCUIT BOARD ASSEMBLY (CONT) PART # DESCRIPTION REFERENCE DESIGNATION PART # DESCRIPTION REFERENCE DESIGNATION 029450 RES CF 1/4W 240K 5% R47,57 033582 CAP PF RDL 100V .0039uF 10% 025061 RES CF 1/4W 330K 5% 033583...
  • Page 5 PARTS LIST PARTS LIST POWER AMP PRINTED CIRCUIT BOARD ASSEMBLY POWER AMP PRINTED CIRCUIT BOARD ASSEMBLY (CONT) PART # DESCRIPTION REFERENCE DESIGNATION PART # DESCRIPTION REFERENCE DESIGNATION 033310 PCB ASSY POWER AMP (120V) 033311 PCB ASSY POWER AMP (220V/240V) 017974 MICA PAD TO-220 Q14-17 033312...
  • Page 6 PARTS LIST PARTS LIST POWER AMP PRINTED CIRCUIT BOARD ASSEMBLY (CONT) REAR PANEL POWER AMP ASSEMBLY (CONT) PART # DESCRIPTION REFERENCE DESIGNATION 014171 SCREW M 4-40X3/8" PHP BLX (AT Q8,14-17) PART # DESCRIPTION REFERENCE DESIGNATION 033051 SCREW M 6-32X1/2" PHPS ZI (AT Q18,20-23,25) 016352 NUT HEX 3/8-32X3/32 TK NI...
  • Page 7 PARTS LIST PARTS LIST MISCELLANEOUS DIGITAL REVERB CONTROL PRINTED CIRCUIT BOARD ASSEMBLY PART # DESCRIPTION REFERENCE DESIGNATION 031882 CLIP W/ADHESIVE (RIBBON CABLE MOUNT) QTY PART # DESCRIPTION REFERENCE DESIGNATION 029821 EYELET RFLNGD .215 OD X.315 L (REVERB PAN MOUNTING) 026201 GROMMET RUBBER (REVERB PAN MOUNTING) 069393...

This manual is also suitable for:

Sr-6520pSr-8520pSr-6520pdSr-8520pdSr-8520