Line 6 Spider II 15 Watt Amplifier Schematic 电路图.pdf

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1、RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 CONFIDENTIAL Spider II 3012/1508 Theory of Operation August 29, 2004 -Guitar input section- Analog signal consideration: An analog signal is input through jack J5, and is referenced to ground by R1 which establishes a 1Meg Ohm input impedance. Maximum

2、input signal amplitude before clipping is about 5Vpp(0 to 200Hz). The signal then passes to U1-A, where the signal is buffered, and also amplified by the pre- emphasis filter in the feedback loop (R3 R4 and C1) This single-pole pre-emphasis filter adds gain starting around 200Hz. Maximum gain is abo

3、ut 8dB at 20kHz. The output of U1-A is the “low gain” analog signal and is sent to the left input of the CODEC U2. It is also sent to the input of U1-B. U1-B increases the “low gain” signal by a gain of 16, and this resulting “high gain” signal is then sent to the Right channel of the CODEC U2. Digi

4、tal signal consideration: The GUITAR_SENSE signal, which is sent to the DSP, indicates the presence of a jack plugged into J1. This signal is created by: J1 and the pull-up resistor R37. The signal is low if there is no jack, and high if a jack is plugged in. EMI consideration: C72 and GF1 help to s

5、hunt HF noise to the chassis and AGND appropriately. ESD consideration: D2 is a voltage clamp, and helps insure that ESD will not exceed the voltage rails of U1. R2 provides over-voltage current limiting for both D5 and U14. -Signal Processing Section- Analog signal consideration: Inputs to ADC: The

6、 “high gain” and “low gain” analog signals arrive at the CODEC from the Guitar In Section. The series capacitors on each input are used as “DC blocking” capacitors since the analog inputs of U2 are biased to approximately of its analog supply, or 1.5V. On the right channel “high gain” input to U2, a

7、 diode D10 is used to “clamp” the voltage to a safe level (- 06.V and +3VA+0.6V) since this channel is usually clipping with a nominal signal present at the input. Spider II Theory of OperationLine 6 confidential. Page 1 of 1 The ADC of U2 converts the left and right analog signals into digital sign

8、als, which are then sent to the DSP (ADC_DATA) for processing. Only one of the signals is chosen based on amplitude, before it is processed. The processing includes a digital de-emphasis filter to compliment the analog pre-emphasis filter. Outputs of DAC: The codec receives the processed digital aud

9、io signal from the DSP at its serial data input (DAC_DATA). The codec then converts the digital signal into analog signals, which are output on pins 15-16 of U2. The analog outputs of codec U13 are differential, and have a DC bias of approximately +3.3VA (about 1.5V). C14-15 are used as DC blocking

10、caps. The output signals are summed in order to gain 3dB of noise performance because our system is mono for this product. The signal then is passed to U9-A, which is configured as a low-pass filter with gain of around 4.1. The frequency cutoff for the LPF is well above the audio pass-band. (fc20kHz

11、) and is intended to reduce EMI. The resulting output of U9A (+AUDIO_L) is single-ended, and in- phase with the systems input. J2 is configured as an auxiliary CD/MP3 input. The L/R signals are summed mono via R45 and R47 and mixed with our CODEC output at U9-A. U9-B is configured as a buffer betwee

12、n the master volume and the power amp input. Digital signal consideration: System reset is provided internally by the MCU. The MCU provides system control and ADC for all of the front panel potentiometers. The DSP U5 provides processing of the audio signals. Clocks: The 3.6864MHz system master clock

13、 is composed of the components connected to pin 55 (EXTAL) of U7. All other clocks are generated from the master clock within U5, using a PLL. The filter for the PLL is made up of the components connected to pins 31 and 32 of U7. CODEC clocks: The codec clocks are generated by U5. Since the system s

14、ampling frequency (fs) is 39.0625 kHz, this is the frequency of the LRCLK. BCLK is the bit clock and runs at a speed of 64fs, or 2.5MHz. Finally, the codec master clock, or MCLK, runs at 256fs, or 10MHz. Memories: There is one SRAM connected to the DSP. The SRAM U7 is used for buffering processed au

15、dio signals. FBV: The floorboard signals are buffered through U6. The signals are serial differential output and single ended input. Diodes D25-27 provide ESD/over-voltage protection for U6. LEDS: The MCU pulls the cathode of an LED on the U.I. low to turn it on. Resistors R6,13,15,19,29 limit curre

16、nt to the LEDS. JTAG: The JTAG port of the DSP is available through the uninstalled H2 header. This connection is used for development and in-house software upgrades. Midi/Development I/O: H3 is used to interface with the MCU for development and programming. Control/sense lines: HP_SENSE: Is an acti

17、ve high signal, which indicates if a jack has been plugged into the headphone jack. Spider II Theory of OperationLine 6 confidential. Page 2 of 2 Spider II Theory of OperationLine 6 confidential. Page 3 of 3 GUITAR_SENSE: See Guitar In Section above. -Power Amplifier Section- Analog signal considera

18、tion: Power amp: The +AUDIO_L signal travels to the Power Amplifier PCBA and is input to the Power Amplifier IC U8 at pin 2. The power amp topology is set up as a current feedback system to provide a more tube like response to the user. R51 is used as a current sense resistor and feeds back signal i

19、nto the input. C24 and R52 form an RC network to help suppress oscillation. The ground of the speaker output is connected to the headphone jack so that the speaker is disconnected when headphones are installed. Headphone output and Headphone Sense: R65 and 66 reduce the output of the power amp to a

20、level more suitable for headphones. C44- 46 act as high frequency shunts to chassis ground for EMI. Comparator U10 is needed to sense when headphones are installed because the pin configuration of our jack doesnt work for this application. The reference voltage of U10 is set by R57 and R62. Normally

21、 the voltage at pin 7 is kept lower than pin 6 by the power amp. This keeps the output of the CODEC low. D15 is used to keep negative voltages from damaging U10. Once headphones are installed, pin 4 of J3 is left floating which allows the voltage at pin 7 to rise above pin 6. This causes the output

22、of the comparator to go high and the DSP senses this. The DSP then turns on speaker simulation for the headphones. -Power Supply Section- +3.3V is produced by U11, an adjustable voltage regulator. The output of U11 is determined by the two resistors R63 and R64. D18 provides over-voltage and under-v

23、oltage protection, while C37 provides filtering. +VL is used to supply an optional foot controller on the 3012. +/-HI is provided by the bridge rectifier formed by D16-17,19-20 and filtered by C35 and C36. This voltage feeds the power amp directly. +/-VA are regulated to approx +/-9V by Q1 and Q2. T

24、hese transistors act as discrete regulators because their base is biased by 10V zeners D14 and D13. R54 and R61 provide some level of over current protection. C30 and C34 are used as a time constant in conjunction with R53 and R55 in order to ramp up +/- VA slowly at system start up. This minimizes

25、turn on pop at the speaker output. 99-010-1705 Spider II 30 120v Packout Part NumberDescriptionQty PerReference Designator(s) 40-00-0053 MANUAL USER UNIVERSAL SPIDER2-1508/3012/A3 1 PACK-OUT. 40-00-1000 CARD WARRANTY LINE 6 HARDWARE 1 PACKOUT 40-03-2000-1 CARD REGISTRATION EUROPE 1 PACKOUT 40-25-010

26、1 LABEL BAR CODE S/N 2-PNL LTX 16 1125502 2 59-00-0002-2 ASSY UNIT COMPLETE 120V SPIDER2-3012 1 59-00-0002-2 ASSY UNIT COMPLETE 120V SPIDER2-3012 Part NumberDescriptionQty PerReference Designator(s) 11-20-0006 SPEAKER 12 4-OHM 50W CH-CONE CELESTION G12E-50 T5400 1 11-30-0013 XFMR 100/120VAC 16.5VAC

27、x 2 / 7.2VAC SPIDER2-3012 1 21-34-0055 CBL ASSY 2 PIN 8.0 IN LG 1 H4 Main PCBA to Speaker. 21-37-0001-1 CBL POWER US/JA 10A/250V 6-FT 18AWG AC-PLUG to CRIMP-TERM x3 1 24-19-0002 FUSE 1A/250V 5x20mm FRN T Littlefuse H239 001 or equiv. 1 24-24-0606 SWITCH POWER ROCKER 6A/250VAC 10A/120VAC PNL-MNT BLK

28、1 30-00-0033 SCREW 10-24 x7/8 TRUSS HD PHH BLK 4 Speaker Mounting. 30-00-0043 SCREW 6-32 x 5/16 w/LK WASH PPZ STL 2 (1)Main PCBA,(1)Ground Wire Terminal. 30-00-0375 SCREW 6-32 x .375 PPB 3 Screws Used for Switch PCBA. 30-00-0402 SCREW #4 x 1/2IN SEMS w/EXT. TOOTH WASHER STL/ZNC 1 Power Amp IC to Cha

29、ssis. 30-00-1020 SCREW 10-24 x 1-1/4 OVAL CTSKPB STL 4 Chassis to Cabinet. 30-00-1033 SCREW 10-32 x 3/8IN SCH STL BLK OXIDE 4 Screws secure Front Panel to Chassis. 30-03-0112 WASHER FINISHING #10 FLANGED STL BLK OXIDE 4 Chassis to Cabinet. 30-03-0400 WASHER #4 SPLIT LOCKWASHER ZINC 1 Power Amp to Ch

30、assis. 30-03-0425 WASHER #4 0.125 ID x .233 OD.018 HEIGHT ZINC PLATE 1 Power Amp to Chassis. 30-06-0440 NUT HEX .242 4-40 STL/ZNC 1 Power Amp IC. 30-06-0832 NUT .335 HEX 8-32 STL ZINC W/ TOOTH WASHER 4 Transformer to Chassis. 30-15-0404 SHOULDER BUSHING TO-220 VALPAKNY04-040-140-012TWG 1 Power Amp I

31、C. 30-24-0003 CABLE-TIE 4 CLEAR 3 (1)AC Wire,(1)Speaker Programming Cable, Ref Step#19 in MAI. 30-27-0104 PANEL U/I 16.69 x 3.83-IN ABS GREY SPIDER2-3012 1 30-45-0011 KNOB POT .77 DIA x .76 HT PLASTIC CHROME-PLATED 8 30-51-0174 CHASSIS 5.9 x 3.3 x 16.69 16AWG AL SPIDER2-3012 1 30-51-0219 U-NUT 10-24

32、 BLK PHOSPHATE 4 Chassis to Cabinet. 30-63-1325 FOAM W/ADH. 13.25 x 0.25 x 0.06 VOLARAPOLOLEFIN 2 Chassis Top. 30-63-1550 FOAM W/ADH. 15.50 x 0.25 x 0.06 VOLARAPOLOLEFIN 2 Chassis Front. 30-63-4003 PAD THERMAL TO-220 TYPE:K6 BERG K6AC-58 1 Power Amp to Chassis. 30-75-0020 KEYPAD RUBBER 6.74 x .57 x0

33、.23BLK SPIDER2-3012/1508/A3-1 1 30-75-0021 STRAIN RELIEF BUSHING 13.5MM x12MM 1 AC Cable. 30-75-9600 GROMMET RUBBER 7/16-D x 1/16-GRV x 3/4 GRV-DIA BLK 1 Speaker Wire. 40-25-0018 STICKER LINE6 LOGO OVAL 109.5x28.5mm EPOXY CLEAR 1 40-25-0030 LABEL ETL KWANASIA 2x 1 1 40-25-0057 LABEL SPEAKER 12-IN 4-

34、OHM CELESTION G12E-50 (11-20-0006)1 50-02-0040 PCBA PANELIZED MAIN/SW/PA SPIDER2-3012 1 50-03-0013 ASSY CABINET SPIDER2-3012 1 50-02-0040 PCBA PANELIZED MAIN/SW/PA SPIDER2-3012 Part NumberDescriptionQty PerReference Designator(s) 50-02-0029 PCBA MAIN SPIDER2-3012 1 50-02-0038 PCBA USER-INTERFACE SPI

35、DER2- 1508/3012 1 50-02-0039 PCBA POWER-AMP SPIDER2-3012 1 50-02-0029 PCBA MAIN SPIDER2-3012 Part NumberDescriptionQty PerReference Designator(s) 01-16-0471 RES CARBON FILM 470R 1/2W 5% TH 2 R65, R66. 01-24-1000 RES 100R 1% 0805 3 R54, R61, R64. 01-24-1001 RES 1.00K 1% 0805 2 R2, R8. 01-24-1002 RES

36、10.0K 1% 0805 5 R38, R39, R53, R55, R56. 01-24-1003 RES 100K 1% 0805 1 R57. 01-24-1004 RES 1.00M 1% 0805 3 R1, R58, R62. 01-24-10R0 RES 10.0R 1% 0805 1 R34. 01-24-1332 RES 13.3K 1% 0805 4 R45, R47, R48, R49. 01-24-1502 RES 15.0K 1% 0805 1 R7. 01-24-1620 RES 162R 1% 0805 1 R63. 01-24-1912 RES 19.1K 1

37、% 0805 2 R22, R23. 01-24-2002 RES 20.0K 1% 0805 2 R20, R21. 01-24-2211 RES 2.21K 1% 0805 1 R4. 01-24-22R1 RES 22.1R 1% 0805 3 R9, R10, R67. 01-24-3321 RES 3.32K 1% 0805 1 R3. 01-24-4751 RES 4.75K 1% 0805 7 R31, R32, R33, R36, R37, R40, R60. 01-24-4752 RES 47.5K 1% 0805 1 R27. 01-24-5492 RES 54.9K 1%

38、 0805 1 R44. 01-24-5R11 RES 5.11R 1% 0805 2 R25, R26. 01-48-0001 POT MONO CTR-DTNT10KB LINEAR 9mm/20mm SHFT 18-TH KNURLD HOR8 R11, R16, R17, R24, R30, R35, R42, R59. 03-10-0106 CAP ELEC 10uF 10V 20% RADIAL 5/11/5 4 C4, C5, C10, C12. 03-10-0338 CAP ELEC 3300uF 6.3V 20% RADIAL 10/20/5 1 C28. 03-10-610

39、8 CAP ELEC 1000uF 6.3V 20% RADIAL 8/11.5/5 2 C8, C37. 03-12-0107 CAP ELEC 100uF 16V 20% RADIAL 6.3/11/5 2 C30, C34. 03-12-0476 CAP ELEC 47uF 16V 20% RADIAL 6.3/11.2/5 1 C18. 03-12-1338 CAP ELEC 3300uF 16V 20% RADIAL12.5/25/5 1 C38. 03-14-0228 CAP ELEC 2200uF 25V 20% RADIAL 12.5/25/5 2 C35, C36. 03-1

40、8-0105 CAP ELEC 1uF 50V 20% RADIAL 5/11/5 4 C6, C7, C14, C15. 03-18-0106 CAP ELEC 10uF 50V 20% RADIAL 5/11/5 2 C31, C32. 03-24-0273 CAP MET-POLY 27nF 50V 5% TH 7.3/3.2/5/5 1 C1. 03-50-0270 CAP NPO 27pF 50V 5% 0805 1 C23. 03-52-0102 CAP X7R 1nF 50V 10% 0805 15 C39, C40, C41, C44, C45, C46, C47, C48,

41、C50, C51, C73, C74, C75, C76, C77. 03-52-0104 CAP X7R 0.1uF 50V 10% 0805 17 C9,C11,C13,C42,C43,C49,C53,C55-C60,C62-C65. 03-52-0332 CAP X7R 3.3nF 50V 10% 0805 1 C16. 03-52-0470 CAP X7R 47pF 50V 10% 0805 1 C72. 50-02-0029 PCBA MAIN SPIDER2-3012 Part NumberDescriptionQty PerReference Designator(s) , 03

42、-52-0473 CAP X7R 47nF 50V 10% 080516C71. 06-04-4002 DIODE SMALL-SIGNAL 100V 30A DO-41 AXIAL TH 1N4002 8 D16, D17, D19, D20, D21, D22, D23, D24. 06-23-0054 DIODE SCHOTTKY DUAL 30V 200mA 5nS SOT-23 SM BAT54S 1 D10. 06-28-8410 DIODE ZENER 10V 5% 350mW SOT-23 SM BZX84C10 2 D13, D14. 06-34-0016 DIODE SWI

43、TCHING 75V 200mA 6nS SOT-23 SM BAS16LT1 1 D15. 06-34-0031 DIODE GEN PUR DUAL 120V 600mA 50nS SOT-23 SM BAS31 5 D2, D18, D25, D26, D27. 09-10-4401 TRANS NPN SMALL-SIGNAL MBT4401SOT-23 SM 1 Q2. 09-10-4403 TRANS PNP SMALL-SIGNAL MBT4403SOT-23 SM 1 Q1. 11-10-2012 FERRITE BEAD 600R100MHZ 300mA 0805 SM 10

44、 L1, L2, L3, L4, L5, L6, L7, L8, L9, L10. 12-00-0317 IC VREG ADJ 1.2-37V 1.5 AMP TO-220 LM317 TH 1 U11. 12-54-0072 IC OP-AMP DUAL TL072CD SM 2 U1, U9. 12-58-0339 IC COMPARATOR QUAD LM339D SM 1 U10. 12-64-4552 IC CONVERTER 3V 24B 96KHz AUDIO CODEC SM AK4552 1 U2. 15-62-0014 IC 74HC14 INVERTER HEX SCH

45、MITT TRIGGER SO-14 SM 1 U6. 15-72-0001 IC SRAM-256K x 8 TSOP32 SM 1 U7. 15-86-0364 IC DSP 24-BIT TQFP-100 SM XCB56364FU100 1 U5. 21-00-6616 JACK 1/4 TRS 6-PIN PCB MT HORIZ TH 2 J1, J3. 21-12-0035 JACK 3.5mm STEREO 5 PIN CRIMPED LEADS NON-THREADED 1 J2. 21-16-0045 JACK RJ-45 8-PIN FEMALE PCB-MNT RT-A

46、NG 1 J4. 21-20-1564 HDR SIL PCB-MT 4-PIN X .156 MALE VERT-MNT FRIC-LOCK 1 H4. 21-20-1565 HDR SIL PCB-MT 5-PIN X .156 MALE VERT-MNT FRIC-LOCK 1 H5. 21-30-0014 CBL SIL 7 PIN 2.54 x 76MM 22 AWG S/T 1 JP2-A Main PCB to JP2-B Power Amp. 21-30-0029 CBL DIL 14 PIN .100 PITCH 2.0 IN RIBBON STAKED TO FEMALE

47、1 H1 To H6. 30-18-3030 CLIP GND PCB .30 x.30 x.07 3 GF1, GF2, GF3. 30-51-0146 SHIELD PCB MT FOR 1/4 JACK 1.00 Hx1.25Wx.013THK BERYL COP1 SH1. 35-00-0029 PCB MAIN SPIDER2-3012/1508 REV.A 1Not Available As A Replacement Part 45-01-0009 IC PROGRAMMED MCU v1.01 c/s= 0 xAFD6414D SPIDER2-1508/3012 1 U3. 4

48、5-02-0020 IC PROGRAMMED FLASH v1.01 c/s=0 x00DFD39D SPIDER2-3012 1 U4. 50-02-0038 PCBA USER-INTERFACE SPIDER2- 1508/3012 Part NumberDescriptionQty PerReference Designator(s) 01-24-1300 RES 130R 1% 0805 5 R6, R13,R15, R19, R29. 01-24-4751 RES 4.75K 1% 0805 5 R5, R12, R14, R18, R28. 06-34-0016 DIODE S

49、WITCHING 75V 200mA 6nS SOT-23 SM BAS16LT1 5 D3, D5, D6, D9, D11. 18-22-0003 LED YELLOW SUPER 2.0 x1.2x1.1mmAP2012SYC SM 5 D1, D4, D7, D8, D12. 21-21-0014 HDR DIL PCB-MT 14-PIN 2x7x.100MALE SHRD VERT MT TH 1 H6. 35-00-0038 PCB SWITCH-BOARD REV.A SPIDER2-3012/1508 1Not Available As A Replacement Part 50-02-0039 PC