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.
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.
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.
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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...
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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...
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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...
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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...
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