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DELUXE 112 PLUS
p/n 022-6702-000 (120V)
SERVICE MANUAL
CONTENTS:
Notices Specifications Theory of operation Parts lists: PCB assembly Chassis assembly Footswitch assembly Cabinet assembly Miscellaneous Schematics/diagrams
Fender Musical Instruments Corp. 7975 North Hayden Road Scottsdale, AZ 85258
DELUXE 112 PLUS
(This is the model name for warranty claims)
SERVICE MANUAL
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 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 CAP CA CAP CD CAP MPF CAP MY CAP PFF = = = = = = Aluminum Electrolytic Ceramic Axial Ceramic Disk Metalized Polyester Film Mylar Polyester Film/Foil HARDWARE CODES BLX CR HWH M NI OHP PB PHP PHPS SMA SMB SS TF ZI = = = = = = = = = = = = = = Black Oxide Chrome Plated Hex Washer Head Machine Screw Nickel Plated Oval Head Phillips Particle Board Pan Head Phillips Pan Head Phillips Sems Sheet Metal "A" Point Sheet Metal "B" Point Stainless Steel Thread Forming Zinc Plated
RESISTOR CODES RES CC RES CF RES FP RES MF RES WW = = = = = Carbon Comp Carbon Film Flame Proof Metal Film Wire Wound
DELUXE 112 PLUS SPECIFICATIONS
Product Release No.: Part Number: PR 291 (This is not a model number) 120V Version : 100V : 230V : 22-6702 22-6772 22-6762
Power Requirements: Input impedance: Power output: Effects Loop:
180-120VAC, 50-60 Hz, 360W max. 230-240VAC, 50 Hz, 360w max. Input 1: 850k Input 2: 66k 94 watts RMS into 4 at 5% THD Preamp Output Impedance: 1k Power Amp Input Impedance: 44k Power Amp Sensitivity: 1.0V for Clipping Height: 16 1/2" Width: 20 5/8" Depth: 9" 33 lbs. (41.9 cm) (50.5 cm) (22.9 cm) (14.9 kg)
Dimensions:
Weight:
Product specifications are subject to change without notice
DELUXE 112 PLUS THEORY OF OPERATION
Input 1 is a high sensitivity input. Input 2 is a low sensitivity input. Inputs 1 and 2 contain series switches that connect to +16Vdc via a third series switch located within the Power Amp in jack (J5). From the input jacks, this series circuit terminates at the gate of JFET Q7. Q7 is part of a muting /turn on delay circuit for the input of the power amp. Therefore the input signal to the power amp will remain muted until a plug is inserted into either Input 1,2 or the Power Amp in jack. The first stage (U2A) sets up the initial response of the amplifier. It provides a second order high pass filter with a 3dB down point at 60Hz, and a gain of about 3.8. The output of U2A splits to feed the clean and overdrive channel. For the clean channel, the signal feeds the Treble, Bass and Mid controls that provide boost and cut respectively. The signal then flows to U7A. U7A is a buffer for the adjustable high pass filter made up by C59, C60, R108 and R109. The inverted signal at U5A is sensed through R109 and fed back to the junction of C59 and C60. As the Volume control is turned up, the feedback from R109 provides 6dB of attenuation at 30Hz. This prevents the speaker from flapping at very low frequencies. U2B is an Auto-pad circuit. It provides excellent headroom and low noise. The signal split from U1A feeds the overdrive channel through a special tone shaping circuit located just prior to U2A. This circuit is a third order bandpass filter with a peak boost at 2.2kHz. It provides the optimum frequency response for the following distortion circuit. U2A provides the variable gain adjustment that drives the distortion circuit. It also acts as a bandpass filter with 3dB down points at 90Hz and 4kHz. U2B is the distortion circuit. LD1 and LD2 provide diode distortion. The Contour control adjusts the overall tone quality of the overdrive channel by emphasizing or notching the mid range frequencies. In the fully CCW position the response is fairly flat up to about 2kHz, where a gentle roll-off occurs. In the fully CW position, the circuit provides a 20db notch at about 1kHz. The signal then feeds the overdrive volume control and the treble and bass controls. The signal from the Clean and Drive channels sum at U5A via JFETs Q4 and Q5. The output from U5A feeds the reverb drive circuit (U6A) and summing amp U5B. U6B is the reverb sensing circuit. The output of U6B drives the Reverb volume control and then sums with the dry signal at U5B. The output of U5B drives the preamp out jack, is normalled through the power amp in jack, and feeds the power amp input. CHANNEL SWITCHING The AC voltage from the power transformer secondary is tapped off through resistor R82, and presented to the footswitch jack (Approx 20 V RMS). By rectifying the positive or negative side of the waveform, we create a DC control voltage that is sensed by comparators U4A and U4B. Diode's CR20 and CR21 set up the reference voltages for the comparators. Therefore the control voltage must toggle between +15Vdc and 15Vdc. The comparator output controls the JFETs and the indicator LEDs. Without the footswitch connected to the footswitch jack, CR15 rectifies the negative half of the waveform. U4B senses the DC control voltage, and provides 15Vdc to the gate of Q6, allowing the reverb output to function. POWER AMP U1 is a high voltage op-amp that provides voltage gain for the power amplifier. CR3 and CR4 act as differential protection diodes that prevent the positive and negative inputs of U1 from becoming more than 0.6 volts apart. Bootstrap Capacitors C37 and C38 sense the output through R69. This provides more voltage swing for the opamp with respect to ground. Diodes' CR5-CR8 (BYV26D) make up the Fixed Bias circuit for the output transistors. The Bias Diodes mount through a hole in the transistor heatsink. This ensures the Diodes will properly track the temperature of the output transistors. These Diodes were selected because they exhibit a 2mV decrease in Knee Voltage for every 1 degree (Celsius) increase in temperature. Pin 6 of U1 is at 0 Vdc. Therefore the Bias Diodes provide 2 voltage drops (+/- 1.2volts) to the Base of Darlington Transistors Q1,Q2, Q10 and Q11.
DELUXE 112 PLUS THEORY OF OPERATION (CONT)
Diodes' CR9-CR12 make up a voltage clamp protection circuit. Q8 and Q9 make up a current limiting protection circuit. If the output is shorted, the voltage at the emitters of Q10 and Q11 will increase. This voltage is sensed through R100 and R107 and presented to the bases of Q10 and Q11. When Q10 and Q11 turn on, the drive current and bias to the output transistors is removed, which shuts down the output section of the amplifier. The output signal feeds through the Headphone jack circuit, before driving the speaker. With headphones connected to the headphone jack the speakers are muted.
PARTS LIST
QTY
1 1 1 1 2 1 4 1 6 4 2 1 1 1 1 1 1 2 2 4 2 5 1 2 1 1 1 6 5 2 1 2 1 1 2 1 3 2 26 4 4 2 2 12 2 2 1
PART #
048873001 031910 048451 028577 031756 028458 028459 028460 028465 028471 025787 039255 038698 038873 038699 038701 038874 039263 039268 027278 027281 027286 033579 033580 033581 036234 033590 033591 033592 033596 024853 027947 027949 027397 027940 027943 027941 064089 006260 029045 028776 027327 028119 025802 026000 025996 039982
PRINTED CIRCUIT BOARD ASSEMBLY DESCRIPTION REFERENCE DESIGNATION
PCB ASSY DELUXE 112 PLUS BREAKER THERMAL 15A 155/195DEG BUTTON PUSH OFF WHITE CABLE REVERB 30" CAP AE 4700uF 50v CAP AE RDL 1uF 50V 20% CAP AE RDL 2.2uF 50v 20% CAP AE RDL 4.7uF 50V 20% CAP AE RDL 22uF 50V 20% CAP AE RDL 47uF 50V 20% CAP AE RDL MINI 100uF 16V NP CAP CA 10PF 100V CAP CA 47PF 100V CAP CA 22PF 100V CAP CA 100PF 100V CAP CA 470PF 50V CA[ CA 560PF 50V CAP CA 100PF 100V CAP CA 4700PF 100V CAP MPF .1uF 63V 10% CAP MPF .22uF 63V CAP MPF .47uF 63V CAP PFF RDL .0015uF 100V 10% CAP PFF RDL .0022uF 100V 10% CAP PFF RDL .0033uF 100V 10% CAP PFF RDL .015uF 100V 10% CAP PFF RDL .022uF 100V 10% CAP PFF RDL .033uF 100V 10% CAP PFF RDL .047uF 100V 10% CAP PFF RDL .068uF 100V 10% CAP PFF RDL .1uF 250V 10% CONTROL SNAPIN 100K 30C TAPER CONTROL SNAPIN 250K 30C TAPER CONTROL SNAPIN 2K 15A TAPER CONTROL SNAPIN 50K 15A TAPER CONTROL SNAPIN 50K 30C TAPER CONTROL SNAPIN 50K B TAPER DIODE 1N4003 DIODE 1N4448 SIGNAL DIODE 6A 400V 6A4 LEAD FORMED DIODE BIAS BYV26D LEAD FORMED DIODE ZEN 1N5234B 6.2V 5% DIODE ZEN 1N5353B 16V 5W 5% FSTN TAB MALE .250X.032 PCB MT FSTN TAB MALE PCB MT .187X.032 FUSE CLIP PCB .250&5MM FUSE FUSE QA 1-1/4X1/4 250V 4A (STUFFED) TS1 @S1 @P1-4 C47,48 C53 C11,33,34,36 C35 C6,12,25,27,39,40 C37,38,49,50 C57,58 C10 C29 C26 C23 C14 C17 C3,32 C1,2 C41,42,59,60 C5,30 C4,15,16,43,44 C21 C13,28 C20 C31 C19 C7,8,9,24,45,46 C18,22,51,52,56 C54,55 C61 R26,35 (GAIN, TREBLE-DRIVE CH) R38 (BASS-DRIVE CHANNEL)
R14 (MID)
R12,13 (CLEAN CH TREBLE, BASS) R24 (CLEAN CHANNEL VOLUME)
R33,34,56 (CONTOUR REVERB DRIVE CHANNEL VOL.)
CR13,14 CR1-4,9,11,15-21,28-36,39-42 CRC22,23,24,25 CR5,6,7,8 CR10,12 CR26,27 CR1-5,7-11,13,14 CP6,12 XF1 F1 (100/120V ONLY)
DELUXE 112 PLUS
QTY
1 1 5 1 1 4 2 4 5 60 1 1 2 1 3 2 1 7 3 3 2 1 1 1 1 1 5 2 2 5 3 2 5 1 2 2 1 6 3 2 1 2 8 1 2 1 2 3 2 1 2 4 2 1 4 6 2 1 1 4 5 1 2
PART #
020794 031725 016795 031611 028047 040903 037036 031570 026043 020888 028098 028039 9902202281 048872 024947 024957 029604 024965 024971 024973 024975 024977 028034 024979 024942 024980 024981 024985 029006 024987 024988 024989 024993 026507 029613 024997 025058 025059 025065 028018 025067 029618 025069 026493 036926 028045 028030 028029 028038 028022 028021 039210 028037 027479 027638 032908 9904701440 028091 028503 028169 014689 016739 028114
PRINTED CIRCUIT BOARD ASSEMBLY (CONT) DESCRIPTION REFERENCE DESIGNATION
FUSE QA 20mmX5mm 250V 2 AMP HEATSINK PLATE IC DUAL OP AMP TL072 IC DUAL OP AMP PC4560 IC OP AMP MC1436/SG1436Y INSULATOR MICA TO-218 JACK PHONE PCB MONO CA PREMIUM JACK PHONE PCB STEREO PREMIUM JUMPER WIRE 18GA .8X.175 JUMPER WIRE 22GA LED 5X5MM GREEN SLB-55MG3 LED RED 5X5MM SLB-55VR3 LED RED LUMEX CS02 PCB FAB DELUXE 112 PLUS RES CF 1/4W 5% 47 RES CF 1/4W 5% 270 RES CF 1/4W 5% 300 RES CF 1/4W 5% 1K RES CF 1/4W 5% 2.2K RES CF 1/4W 5% 3.3K RES CF 1/4W 5% 3.9K RES CF 1/4W 5% 4.7K RES CF 1/4W 5% 5.1K RES CF 1/4W 5% 6.8K RES CF 1/4W 5% 7.5K RES CF 1/4W 5% 8.2K RES CF 1/4W 5% 10K RES CF 1/4W 5% 15K RES CF 1/4W 5% 20K RES CF 1/4W 5% 22K RES CF 1/4W 5% 27K RES CF 1/4W 5% 33K RES CF 1/4W 5% 47K RES CF 1/4W 5% 62K RES CF 1/4W 5% 91K RES CF 1/4W 5% 100K RES CF 1/4W 5% 180K RES CF 1/4W 5% 220K RES CF 1/4W 5% 470K RES CF 1/4W 5% 510K RES CF 1/4W 5% 680K RES CF 1/4W 5% 910K RES CF 1/4W 5% 1M RES CF 1/2W 5% 2.7k RES CF 1/2W 5% 4.7k RES FILM 1W 5% 220 RES FILM 1W 5% 680 RES FILM 1W 5% 1.5K RES FILM 1W 5% 3.9K RES FILM 2W 5% 120 RES FILM 2W 5% 470 RES WW 5W 10% .47 RES WW BT 5W 10% 330 RES WW BT 10W 10% .1 SCREW TF 4-40X3/8 HWHS ZI .1" HD SCRW TF 6-32X3/8 PHP ZI SPACER LED .7X.125 BLUE @LD3,4 SWITCH PUSH SLFLK SHORT STROKE THERMISTOR 10 OHM 5A C60-11 WSHR SHLDR NYL 5/32X1/4 XSTR N-CH JFET J111 TO-92 XSTR NPN 2N4401 TO-92 XSTR NPN TIP 142 TO-218AC F1 (230/240V ONLY) (TRANSISTOR MOUNT) U2,3,5,6,7 U4 U1 @Q1,2,10,11 J3,4 (FOOTSWITCH PREAMP OUT) J1,2,5,6 (INPUTS, POWER AMP IN HEADPHONE) JP1-5 W1-60 LD4 LD3 LD1,2 (RAW BOARD) R4,5,45 R101,106 R84 R17,30,48,52,99,100,107 R23,71,72 R25,27,54 R61,77 R44 R8 R9 R22 R20 R53,86,87,93,94 R10,40 R102,104 R11,15,18,19,37 R60,62,66 R2,3 R31,32,36,39,59
R78
R41,50 R47,58 R16 R21,29,42,43,108,109 R28,46,55 R6,7 R65 R51,57 R1,49,85,88,91,92,95,96 R83 R70,73 R69 R63,67 R64,68,82 R89,90 R79 R80,81 R74,75,103,105 R97,98 R76 @Q1,2,10,11 HEATSNK/BREAKER @LD3,4 S1 (DRIVE SELECT) TH1 (@Q1,2,10,11) Q3,4,5,6,7 Q8 Q1,10
DELUXE 112 PLUS
QTY
1 2
PART #
016742 028115
PRINTED CIRCUIT BOARD ASSEMBLY (CONT) DESCRIPTION REFERENCE DESIGNATION
XSTR PNP 2N4403 TO-92 XSTR PNP TIP 147 TO-218AC Q9 Q2,11
CHASSIS ASSEMBLY QTY
1 1 1 1 1 1 1 1 1 1 1 1 1 10 4 1 1 1 2 5 2 1 4 1 1
PART #
048879 021709 026116 026038 010401 026527 048465 026528 036479 040992 048874 028560 031726 026402 028591 048875 048876 038900 028937 028500 025936 025935 030007 027668 039357
DESCRIPTION
CHS ASSY DELUXE 112 PLUS BUSHING SR .437X.062X 13/32 BLK BUSHING SR .500X.063X7/16 BLK BUSHING SR .625X.062X37/64 BLK BUSHING SR .625X.125X37/64 WHT CABLE ASSY PWR 120V .187 TABS CABLE ASSY PWR .187 TAB 100V CABLE ASSY PWR 230V .187 TAB CABLE ASSY PWR AUST .187 TABS CABLE ASSY PWR 5A U.K. .187 TAB CHS DELUE 112 PLUS END BELL XFMR 85W HEATSINK BAR M-80 KNOB POINTER BLACK NUT ACORN 8-32 PANEL FRONT DELUXE 112 PLUS PANEL REAR DELUXE 112 PLUS SCRW TF 6-32X1*4 PHP ZI SCRW TF 6-32X5/8 PHP ZI TAPTYT SCRW TF 8-32X3/4 HWH SLTD ZI STANDOFF NYLON PCB SNAPIN 3/8" SWITCH DPST .187 TAB (DOM) WSHR LCK INTL 8X.330X.02 ZI XFMR PWR 120V 85W XFMR PWR EXP DELUXE 112
REFERENCE DESIGNATION
(COMPLETE CHASSIS 120V) (@ SPEAKER CABLE) (@ REVERB CABLE) (@ POWER CABLE) (@ POWER CABLE 230/240V) (POWER CABLE 120V ONLY) (POWER CABLE 100V ONLY) (POWER CABLE 230V ONLY) (PWR CABLE AUSTRALIA ONLY) (PWR CABLE UNITED KINGDOM) (RAW CHASSIS) (TRANSFORMER MOUNT (COUPLER TO CHASSIS) (TRANSFORMER MOUNT) (@ GROUND LUG) (PCB TO CHASSIS MOUNT) (HEATSINK TO CHASSIS MOUNT) (PCB MOUNT) (POWER SWITCH) (TRANSFORMER MOUNT) (120V DOMESTIC ONLY) (100V/115V/230V/240V)
QTY
1 2 1 2 2
PART #
028/122 006260 037036 028039 028714
FOOTSWITCH ASSEMBLY DESCRIPTION REFERENCE DESIGNATION
FOOTSWITCH 2 BTN REVERB F/LOGO DIODE 1N4448/1N914B SIGNAL JACK PHONE PCB MONO CA PREMIUM LED RED 5X5MM SLB-55VR3 SWITCH PUSH SPDT (COMPLETE FOOTSWITCH) CR1,2 J1 LD1,2 S1,2
CABINET ASSEMBLY QTY
1 1 4 2 4 1 1 2 4 1 1 8 1 4 4 6 5 2 2 10 4
PART #
041485 022491 026566 026568 019276 040051 027846 019279 019275 032524 011298 021972 028055 026577 022244 036199 029828 018113 011678 026571 026625
DESCRIPTION
CAB ASSY PERFORMER 650 CLAMP CABLE NYL SCRW MNT 5-16 CORNER 2 HOLE W/TAB NI CORNER 3 HOLE NI GLIDE CAB 1.24X.335 NI GRILLE ASSY DELUXE 112 HANDLE 9.25" NO LOGO HANDLE CAP 2 HOLE NICKEL INSERT GLIDE CUSHION 1.27 DIA INSERT HANDLE NAMEPLATE FENDER SMALL NUT T 10-32X3/4 STR 3 PRNG BLX REVERB UNIT 800 OHM 8EB2C1B DN SCRW M 10-32C1 PHP BLX SCRW M 10-32X1-1/8 OHP NI SCRW M 8-32X1-3/16 OHP BLX CP SCRW PB 8X3/4 PHP ZI SCRW SMA 4X1/2 OHP BLX SCRW SMA 8X1-1/2 OHP BLX SCRW SMA 8X1/2 THP NI SCRW WOOD 8X1 FH
REFERENCE DESIGNATION
(CABINET ONLY) (@ REVERB CABLE) (NO INSERT) (GRILLE ONLY) (RUBBER ONLY, NO INSERT) (HANDLE MOUNT) (RUBBER ONLY) (SPRING STEEL) (LOGO) (SPEAKER/HANDLE MOUNT) (PAN) (SPEAKER MOUNT) (HANDLE MOUNT) (CHASSIS MOUNT) (REVERB PAN MOUNT) (LOGO MOUNT) (GRILLE MOUNT) (CORNER MOUNT) (GLIDE MOUNT)
DELUXE 112 PLUS
QTY
6
PART #
029527
CABINET ASSEMBLY (CONT) DESCRIPTION REFERENCE DESIGNATION
WSHR FNSH 8-5/8 FLNGD BLX WX (CHASSIS MOUNT)
MISCELLANEOUS QTY
1 1
PART #
048877 048871
DESCRIPTION
MANUAL OWNERS DLX 112 PLUS SCHEM REDU DLX 112 PLUS W/ SERV
REFERENCE DESIGNATION