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

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
2
June, 2002
IMPORTANT NOTICE
•Copyright © 2002 FMIC. All rights reserved. All
information contained herein is CONFIDENTIAL
and PROPRIETARY and is the property of
Fender® Musical Instruments Corporation. It is
not to be sold or assigned to another party and is
disclosed solely for use by Fender Authorized
Service Centers for purposes of product service
and maintenance. All information is not to be dis-
closed to others without the expressed permission
of Fender® Musical Instruments Corporation. All
specifications are subject to change without no-
tice. This information and any copies produced
electronically or otherwise must be surrendered
upon demand of Fender Musical Instruments Cor-
poration.
•Parts marked with two asterisks (**) indicate the
required use of that specific part. This is neces-
sary for RELIABILITY and SAFETY requirements.
DO NOT USE A SUBSTITUTE!
PARTS LIST CODES
The description codes used in the itemized Parts Lists are defined below:
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
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

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
3
SPECIFICATIONS
Model Name: Champion 30 DSP
Release Number: PR 484
(Not a model number)
Part Numbers (120V, 60Hz) US: 226-7300-020
(110V, 60Hz) TW: 226-7301-020
(240V, 50Hz) AUS: 226-7303-020
(230V, 50Hz) UK: 226-7304-020
(230V, 50Hz) ARG: 226-7305-020
(230V, 50Hz) EUR: 226-7306-020
(100V, 50/60Hz) JPN: 226-7307-020
(220V, 60Hz) ROK: 226-7309-020
Power Requirement: 38 W
Power Output: 30 W RMS into 8 ohms
Impedances Input (Pre-Amp): > 1M ohms
Speaker Complement: One (1) 10", 8 ohm,
FenderSpecial Design
(P/N 0036502000)
Dimensions Height: 15.5 in ( 39.4 cm)
Width: 17 in ( 43.2 cm)
Depth: 8.5 in ( 21.6 cm)
Weight: 25 lbs ( 11.4 kg)
Product specifications are subject to change without notice

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
4
SERVICE NOTES
1. CHASSIS REMOVAL is accomplished by first
removing four (4) screws from the top of the
cabinet; detach the speaker wires from the
speaker and then slide the chassis toward the
rear of the cabinet.
2. uDSP PCB ASSEMBLY REMOVAL is accom-
plished by disconnecting the ribbon cable on
the PCB Assembly, releasing the tabs on each
of the plastic stand-offs which the PCB assem-
bly is mounted. Removal of the uDSP PCB
assembly may be necessary should any of the
Digital Effects operate improperly.
3. CHAMPION 30 DSP MAIN PCB REMOVAL is
accomplished by removing the following items:
All Knobs and potentiometer bushings, four (4)
nuts and washers at the Input, Footswitch and
Headphone Jacks, two (2) screws at the Heat-
sink which attach to the Chassis, five (5) screws
at ST1 – ST5. Disconnect the Transfomer
Leads at P1, P3, P4, P5, and P11. Disconnect
the White and Black speaker wires at P13 and
P14. Disconnect the White and Black wires at
the Power Switch connected to WJ1 and P9.
Disconnect the Ribbon Cable at P2. Pull the
Red Tulip LED Assembly out of the jeweled pi-
lot light.
PCB EXCHANGE POLICY
Parts marked with a single asterisk (*) in the Part
Lists (starting on page 9 are not field replaceable. If
a failure due to one of these components is de-
tected, please contact the Fender® Dealer
Customer Service Department to order the com-
plete PCB Assembly.

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
5
CIRCUIT DESCRIPTION
This section provides an overview of any new or
unusual circuitry incorporated into this amplifier
model. The purpose is to aid the service technician
by providing insight into the design areas most
likely to present a challenge in troubleshooting.
This overview is focused for the efficient use and
security of Fender® proprietary information.
PRE-AMPLIFIER
The guitar input signal is fed into the high pass filter
at U1–A before splitting into two signal paths. The
normal channel signal path (U1–B to U3–B) is ac-
tive until FETs Q1 and Q2 are turned on activating
the drive channel signal path (U2–A to U3–B). Dif-
ferential amp U4–A and follower U4–B adjust the
signal level and provides +1.65VDC bias voltage to
the uDSP effects card. The preamp is in series with
the digital effects card, therefore, disconnecting the
card breaks the overall signal path. The low pass
filter at U5–B recovers the signal from the uDSP
card and sends it to the headphone jack and the
power amplifier.
POWER AMPLIFIER
The LM3876 power amp chip (U8) is used. Load
sense resistor (R69) provides negative current
feedback. This circuit makes use of the on-chip
mute function. During normal operation, transistor
Q4 is on drawing current out of U8 pin 3 through
R85. Zener Diode D27 sets the voltage at which
Q4 turns on. Plugging headphones into J4 re-
moves ground from the cathode of D24 turning Q4
off which mutes the power amp.
POWER SUPPLY
Standard bridge rectifiers, with zener regulation
(D17–18) for the +/–15V supplies. The 7805 regu-
lator (U7) taps off the +27V supply to provide +5V
for the uDSP card and digital user–interface.
DIGITAL USER INTERFACE
The uDSP effects card generates clock signal
DSP_HD1 (~45Hz) which controls the 4053 CMOS
switch to read pots R45 and R81. The DC level (0–
5V) of the pots controls the FX LEVEL and FX SE-
LECT.
DIGITAL NOISE
The uDSP effects card generates some high fre-
quency noise (>50kHz), which is a normal product
of DSP processing. This noise is not audible and
does not effect amplifier performance, but may be
visible when observing the output of the amplifier on
an oscilloscope.

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
*Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY on page 4.
Unique Fender® part. Order directly from the Fender® dealer Customer Service Department.
** Safety Requirement part. Replacement must match Safety Agency…–Value, if specified –Type, if specified –Approval Mark(s) if on part.
** Both a unique Fender® part and a Safety Requirement part as defined above.
6
PARTS LIST: MAIN – PCB ASSEMBLY (continued)
QTY. PART # DESCRIPTION REFERENCE DESIGNATION
10057312004 PCB ASSY CHAMPION 30 DSP
1 * ** PCB FAB CHAMPION 30 DSP
REF 0057314000 SERV. DIA. COMB. CHAMP 30 DSP
20038689001 CAP AE AX .47uF 100V 20% C8-9
20028463003 CAP AE RDL 10uF 50V 20% C30 C64
20028458003 CAP AE RDL 1uF 50V 20% C25 C41
20028459003 CAP AE RDL 2.2uF 50V 20% C42-43
20033607000 CAP AE RDL 2200uF 35V 20% C35-36
80028467003 CAP AE RDL 22uF 50V 20% C3 C11 C26 C29 C39-40 C55 C63
10028460003 CAP AE RDL 4.7uF 50V 20% C44
20028471003 CAP AE RDL 47uF 50V 20% C37-38
20039255001 CAP CA 10pF 100V LL C10 C16
20051457003 CAP CD 100pF 500V 5% C24 C69
30051458003 CAP CD 470pF 500V 10% C7 C47 C54
10051459003 CAP CD 560pF 500V 10% C17
20051409003 CAP CD 68pF 500V 5% C65-66
80034788003 CAP CR .1uF 50V 20% .2" LS C31 C33 C46 C51 C59-62
20020867002 CAP CD 330pF 1000V 10% C52 C68
1 0053860000 ** CAP MPF .1uF 250VAC 20% C58
70027278003 CAP MPF .1uF 63V 10% C14 C28 C48-50 C56-57
20033579003 CAP PFF RDL .0015uF 100V 10% C27 C53
20033580003 CAP PFF RDL .0022uF 100V 10% C13 C32
10033581003 CAP PFF RDL .0033uF 100V 10% C21
30033583003 CAP PFF RDL .0047uF 100V 10% C1-2 C22
30033590003 CAP PFF RDL .022uF 100V 10% C12 C19 C45
40027264003 CAP MPF .01uF 100V 10% C67 C70-72
20033591003 CAP PFF RDL .033uF 100V 10% C5-6
50033592003 CAP PFF RDL .047uF 100V 10% C4 C18 C20 C23 C34
10033596003 CAP PFF RDL .068uF 100V 10% C15
30037324000 CONTROL SNAPIN 100k 30C R13 R25 R32 GAIN, (DR) VOLUME, TREBLE
20038656000 CONTROL SNAPIN 10k B R45 R81 FX SELECT, FX LEVEL
10040552000 CONTROL SNAPIN 250k 30C R35 BASS
10037323000 CONTROL SNAPIN 50k 15A R22 VOLUME
10034719000 CONTROL SNAPIN 50k B R31 MID
70064089001 DIODE 1N4003 LL D13-16 D22-23 D28
10 0006260001 DIODE 1N4448 SIGNAL LL D1-2 D5-7 D20-21 D24-26
20009165001 DIODE ZEN 1N4744A 15V 1W 5% D17-18
10031019001 DIODE ZEN 1N5245B 15V 5% LL D27
10 0025802000 FSTN TAB MALE .250x.032 PCB MT P3-5 P7-11 P13-14
30026000001 FSTN TAB MALE PCB MT .187x.032 P1 P6 P12
2 0051094003 ** FUSE CLIP PCB 5mm @ F1
10057350000 HDR .1 CTR 8x2 CKT SQ PIN P2
10057804000 HEATSINK PLATE LM3876 @ U8
10050849000 HEATSINK PCB LEVEL 576012U @ U7
10028120000 IC 4053B TPL 2 CHAN ANLG SW U9
50031611000 IC OP-AMP DUAL PC4560 U2-5 U10
10016795000 IC OP-AMP DUAL TL072 U1
10057769000 IC POWER AMP 56W/MUTE LM3876T U8
10041812000 IC REGULATOR +5V MC7805CT U7
30051658000 JACK MONO R/A J1-3 INPUT1, INPUT 2, FOOTSWITCH
10055595000 JACK STEREO R/A w/SL SHUNT J4 HEADPHONE
30049948000 LED RED LONG LEAD LUMEX D3-4 D12 DISTORTION, DRIVE STATUS
10055812000 LED TULIP ASSEMBLY D19 POWER
10027869001 RES CF 1/2W 5% 470ohm LL R61

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
*Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY on page 4.
Unique Fender® part. Order directly from the Fender® dealer Customer Service Department.
** Safety Requirement part. Replacement must match Safety Agency…–Value, if specified –Type, if specified –Approval Mark(s) if on part.
** Both a unique Fender® part and a Safety Requirement part as defined above.
7
PARTS LIST: MAIN – PCB ASSEMBLY (continued)
QTY. PART # DESCRIPTION REFERENCE DESIGNATION
10030737001 RES CF 1/2W 5% 5.6ohm LL R70
10024969001 RES CF 1/4W 5% 1.5k LL R48
10025084001 RES CF 1/4W 5% 10M LL R49
50024981001 RES CF 1/4W 5% 10k LL R39-40 R52-53 R91
10024937001 RES CF 1/4W 5% 10ohm LL R77
20024985001 RES CF 1/4W 5% 15k LL R7 R37
10025058001 RES CF 1/4W 5% 180k LL R18
10024986001 RES CF 1/4W 5% 18k LL R71
50024965001 RES CF 1/4W 5% 1k LL R8 R41 R74 R79-80
20025069001 RES CF 1/4W 5% 1M LL R56 R73
50024971001 RES CF 1/4W 5% 2.2k LL R21 R82 R87 R89-90
20024972001 RES CF 1/4W 5% 2.7k LL R75 R78
50025059001 RES CF 1/4W 5% 220k LL R16 R19 R26-27 R38
40024987001 RES CF 1/4W 5% 22k LL R9-10 R17 R34
80024988001 RES CF 1/4W 5% 27k LL R62-65 R93-96
20024973001 RES CF 1/4W 5% 3.3k LL R12 R14
20024975001 RES CF 1/4W 5% 3.9k LL R67-68
10025065001 RES CF 1/4W 5% 470k LL R15
30024961001 RES CF 1/4W 5% 470ohm LL R28 R59-60
40024993001 RES CF 1/4W 5% 47k LL R29-30 R33 R36
40024947001 RES CF 1/4W 5% 47ohm LL R42-43 R83-84
50028034001 RES CF 1/4W 5% 5.1k LL R5 R44 R46-47 R92
20028018001 RES CF 1/4W 5% 510k LL R3-4
10024979001 RES CF 1/4W 5% 6.8k LL R6
10025067001 RES CF 1/4W 5% 680k LL R66
30024995001 RES CF 1/4W 5% 68k LL R1-2 R88
10025942001 RES CF 1/4W 5% 7.5k LL R20
10024980001 RES CF 1/4W 5% 8.2k LL R11
20029613001 RES CF 1/4W 5% 91k LL R23-24
2 0027355001 ** RES MOX 2W 5% 220ohm LL R57-58
1 0027628001 ** RES MOX 2W 5% 47ohm LL R86
10032958000 RES WW 5W 10% .33ohm R69
10028091000 SWITCH PUSH SLFLK SHORT STROKE S1 CH SELECT
10048451000 BUTTON PUSH SWTCH OFF WHT @ S1
30014689003 XSTR N-CH JFET J111 TO-92 Q1-2 Q5
10016739003 XSTR NPN 2N4401 TO-92 Q4
10016742003 XSTR PNP 2N4403 TO-92 Q6
10036178000 SPACER, .5 x .1 BROWN @ D12
20032908000 SCREW TF 6-32 x 3/8 PHP ZI @ HEATSINK PLATE
10027638000 SCRW TF 4-40x3/8 HWHS ZI .1”HD @ U8
10039420000 SCRW M 4-40x3/8 PHP SS SEMS @ U7
10097360000 NUT HEX 4-40 EX LOCK @ U7
10057041000 INSULATOR MICA TDA 7294/7293 @ U8
10017746000 WSHR SHLDR NYL 1/8x1/4 @ U8
15 0020880010 JUMPER WIRE 22GA .4” W3 W13 W15 W20-21 W23 W27 W29 W39
W40-42 W45 W49 W55
29 0020880010 JUMPER WIRE 22GA .5” W1 W5-7 W9-12 W14 W16-19 W22
W25-26 W32-36 W38 W43-44 W46
W51-53 W56
90020880010 JUMPER WIRE 22GA .6” W4 W8 W28 W30-31 W37 W47 W50 W54
30020880010 JUMPER WIRE 22GA .7” W2 W24 W48
10057408000 WIRE SET, PCB CHAMP 30 DSP @ WJ1

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
*Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY on page 4.
Unique Fender® part. Order directly from the Fender® dealer Customer Service Department.
** Safety Requirement part. Replacement must match Safety Agency…–Value, if specified –Type, if specified –Approval Mark(s) if on part.
** Both a unique Fender® part and a Safety Requirement part as defined above.
8
PARTS LIST: uDSP – PCB ASSEMBLY
QTY. PART # DESCRIPTION REFERENCE DESIGNATION
10057797008 PCB ASSY uDSP CHAMPION 30 DSP w/ EPROM
REF 0057283000 SVC DIAG COMB MICRO DSP
1*IC OTP ROM CHAMP 30 DSP R1.01
1*PCB Fab u-DSP
2*CAP 0805 CER .001uF 25V 5%
14 *CAP 0805 CER .01uF 25V 5%
10 *CAP 0805 CER .1uF 25V 5%
2*CAP 0805 CER 22pF 25V 5%
2*CAP 0805 CER 750Pf 25v 5%
3*CAP 3528 TAN 4.7uF 16V 20%
6*CAP 3528 TAN 10uF 16V 20%
5*DIODE SMT 1N4448 SIGNAL
2*HDR .1 CTR 8x2 CKT SQ PIN
4*RES 0805 MF 1/10W 5% 0ohm
2*RES 0805 MF 1/10W 5% 100ohm
4*RES 0805 MF 1/10W 5% 750ohm
4*RES 0805 MF 1/10W 5% 1k
1*RES 0805 MF 1/10W 5% 2k
1*RES 0805 MF 1/10W 5% 3.3k
2*RES 0805 MF 1/10W 5% 4.7k
1*RES 0805 MF 1/10W 5% 15k
1*RES 0805 MF 1/10W 5% 47k
1*IC SMT SOCKET PLCC 44-TT
1*IC SMT TLC549 AD
1*IC SMT SRAM 64Kx16
1*IC SMT COUNTER 74LV4040
1*IC SMT HEX SCHMITT-T INV 74HC14
1*IC SMT VREG +3.3V LM1117
1*IC SMT CODEC TLC320AD77C
1*IC SMT DSP TMS320VC5402PGE
1*IC SMT VREG +1.8V 150mA TPS76318
1*IC SMT RESET 5V MC34064D-5
1*XTAL 20MHz HC49SD
PARTS LIST: CHASSIS ASSEMBLY
QTY. PART # DESCRIPTION REFERENCE DESIGNATION
- 0020786000 ** FUSE QA 20mmx5mm 250v .500A 230-240V ONLY
1 0013112000 ** FUSE TD 20mmx5mm 250v 1A 100-120V ONLY
1 0021709000 BUSHING SR .437x.062x13/32 BLK @ SPKR LEADS
1 0025935000 ** SWITCH DPST .187 TAB (DOM) 100V, 120V ONLY
- 0039287000 ** SWITCH DPST .187 TAB GLOBAL 230V, 240V ONLY
4 0025936000 STANDOFF NYL PCB SNAP 3/8" NAT @ PCB
1 0057359000 CABLE RIBBON 2X8 CKT 6" CONNECT uDSP ASSY TO MAIN PCB
2 0028500000 SCRW TF 8-32x3/4 HWH SLTD Z1 @ HEATSINK BAR
4 0028937000 SCRW TF 6-32x5/8 PHP ZI TAPTYT @ STANDOFFS
1 0041595000 SCRW 6-32x3/16 PHP STL ZI SEMS @ PEM STANDOFF
8 0033206000 BUSHING KNOB SPACER @ CONTROLS
10033613000 ** XFMR PWR 120v 120V ONLY
-0055880000 ** XFMR PWR EXPORT 25W 100V, 230-240V ONLY
10034885000 HEATSINK BAR RD/HT/JM/CHMP110
1 0038900000 SCRW TF 6-32X1/4 PHP ZI @ GND
4 0051404000 STANDOFF NYLON BLK .375 @ MICRO DSP CARD
4 0053479000 NUT HEX 7/16 20X1/8 NI @ J1-4

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
*Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY on page 4.
Unique Fender® part. Order directly from the Fender® dealer Customer Service Department.
** Safety Requirement part. Replacement must match Safety Agency…–Value, if specified –Type, if specified –Approval Mark(s) if on part.
** Both a unique Fender® part and a Safety Requirement part as defined above.
9
PARTS LIST: CHASSIS ASSEMBLY
QTY. PART # DESCRIPTION REFERENCE DESIGNATION
4 0053480000 WASHER, FLAT .442x.692 NI @ J1-4
1 * CHASSIS CHAMPION 30 DSP AMP
10057957000 WIRE SET CHASSIS DOM. CHAMP 30 DSP 120V ONLY
-0057956000 WIRE SET CHASSIS EXP. CHAMP 30 DSP 100, 230-240V ONLY
70054419000 KNOB ROTARY 180 SS W/CHR INS @ CONTROLS
10057347000 KNOB ROTARY W/CHR INS PNTR 180 @ FX SELECT
1 0054642000 ** CONNECTOR IEC SNAP IN
1 0054798000 JEWEL ASSY LED @ FRONT PANEL
1 0031625000 NUT HOLDER PILOT LIGHT 1/16-27 @ JEWEL ASSY LED
10057264000 PANEL FRONT CHAMPION 30 DSP
1 * PANEL REAR CHAMPION 30 DSP
4 0069393000 NUT 6-32 HEX EXT LOCK @ PWR XFMR
PARTS LIST: CABINET ASSEMBLY
QTY. PART # DESCRIPTION REFERENCE DESIGNATION
1 0027846000 HANDLE 9.25" NO LOGO
2 0025395000 HANDLE CAP 1 HOLE NI (DWG17420) @ HANDLE
1 0032524000 INSERT HANDLE @ HANDLE
6 0021972000 NUT T 10-32x3/4 STR 3 PRNG BLX @ HANDLE, GRILLE
4 0026566000 CORNER 2 HOLE w/TAB NI
2 0026568000 CORNER 3 HOLE NI
2 0022244000 SCRW M 10-32x1-1/8 OHP NI @ HANDLE
14 0026571000 SCRW SMAB 8X5/8 THP NI @ CORNERS, FEET
0.014 0027648000 TAPE ALUM 6"x60YDS
0.194 0029085000 VELCRO STRIP LOOP 1.5"wd BLK @ FTSW LOOPS
0.194 0029086000 VELCRO STRIP HOOK 1.5"wd BLK @ FTSW LOOPS
4 0029323000 FOOT RUBBER 1.0 DIA SMALL
0.91 0026570000 TOLEX "BRAVURA BLACK"
PARTS LIST: END ITEM ASSEMBLY
QTY. PART # DESCRIPTION REFERENCE DESIGNATION
2 0018113000 SCRW SMA 4x1/2 OHP BLX @ FENDER NAMEPLATE
4 0026577000 SCRW M 10-32x1 PHP BLX @ SPEAKERS
2 0026800000 SCRW SMAB 8x1-3/4 OHP BLX @ GRILLE
6 0029527000 WSHR FNSH 8-5/8 FLNGD BLX WX @ GRILLE AND CHASSIS SCREWS
10029906000 NAMEPLATE FENDER GENERIC SMALL @ GRILLLE
4 0036199000 SCRW M 8-32x1-3/16 OHP BLX CP @ CHASSIS
10036502000 SPKR 10" 8 OHM (099-4810-003)
10057764000 CAB ASSY CHAMPION 30 DSP
10057315000 MANUAL OWNERS CHAMPION 30 DSP
1 0047248000 ** CORD PWR W/IEC CONN DOM 120V DOMESTIC
- 0053997000 ** CORD PWR W/IEC CONN 100V JPN 100V JPN
- 0047250000 ** CORD PWR W/IEC CONN 240V AUST 240V AUST
- 0047249000 ** CORD PWR W/IEC CONN 230V UK 230V UK
- 0047251000 ** CORD PWR W/IEC CONN 230V EUR EUR & ROK
- 0057674000 ** CORD PWR W/IEC CONN 230V ARG 230V ARG

CHAMPION™ 30 DSP
(This is the model name for warranty claims)
10
Schematics and Drawings
Service Diagram (Schematic) ............Champion 30 DSP
Service Diagram (PCB Assy) ............Champion 30 DSP
Service Diagram (Schematic) ............Micro DSP
Service Diagram (PCB Assy) ............Micro DSP
Chassis Assy ............Champion 30 DSP
End Item Assy ............Champion 30 DSP

D

D