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Yamaha AG-STOMP GA 011589 Service Manual

Acoustic guitar pre-amplifier
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AG-Stomp
ACOUSTIC GUITAR PRE-AMPLIFIER
SERVICE MANUAL
CONTENTS
................................................ 3/4
.................................... 5
............................ 8
............... 10
................................................................... 11
............................ 12
.............................. 15
................................... 18
........................................ 20
................................. 28
............................. 32
MIDI IMPLEMENTATION CHART ......................................... 33
OVERALL CIRCUIT DIAGRAM
This document is printed on chlorine free (ECF) paper with soy ink.
GA
011589
HAMAMATSU, JAPAN
1
1.507K-926
Printed in Japan 2001.7

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Summary of Contents for Yamaha AG-STOMP GA 011589

  • Page 1: Table Of Contents

    AG-Stomp ACOUSTIC GUITAR PRE-AMPLIFIER SERVICE MANUAL CONTENTS SPECIFICATIONS ... 3/4 PANEL LAYOUT ... 5 BLOCK DIAGRAM ... 8 CIRCUIT BOARD LAYOUT ... 10 WIRING ... 11 DISASSEMBLY PROCEDURE ... 12 LSI PIN DESCRIPTION ... 15 IC BLOCK DIAGRAM ... 18 CIRCUIT BOARDS ...
  • Page 2 AG-Stomp This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and under- stood by the users, and have therefore not been restated.

  • Page 3: Specifications

    SPECIFICATIONS Digital Section • Full Digital Signal Processing • Mic Simulator: 8 Types • Feedback Reduction: 5-band • Digital Effects • Limiter • Digital Chorus, Digital Delay • Hall Reverb, Room Reverb, Plate Reverb • External Controller Function (EXP Pedal/MIDI): 8 Controllers/ Parameters •...
  • Page 4 AG-Stomp...

  • Page 5: Panel Layout

    PANEL LAYOUT Top Panel Display & Main Section Display & Main Section Effect Section Foot Switch Section UP Button DOWN Button MANUAL Button UTILITY Button STORE Button Display AG-Stomp Pre-Amplifier Section...
  • Page 6 AG-Stomp Pre-AmpSection MIC TYPE Select Switch (MIC TYPE) BLEND Control (BLEND/STEREO) VOLUME Tone Controls OUTPUT Level Control SHIFT Button Effect Section LIMITER Button LEVEL Feedback Reduction Buttons Frequency Control (FREQ) DEPTH Control CHORUS/DELAY Effect Buttons SPEED/TIME Control DEPTH/FEEDBACK Control LEVEL Reverb Effect Buttons REVERB Volume...
  • Page 7 Footswitch Section Footswitches 1, 2, 3 Bank Switch (AUTO F.R./BANK/TUNER) Rear Panel Power Switch (STAND-BY ON/OFF) Power Adaptor Jack (AC IN 12V 1A) Guitar Power Supply Switch MIDI OUT Jack MIDI IN Jack Digital Output Jack (DIGITAL OUT) EXP. PEDAL Jack Headphone Jack (PHONES) Output Jacks (OUTPUT R, L/MONO) INPUT Jack...

  • Page 8: Block Diagram

    AG-Stomp BLOCK DIAGRAM W101 W102 AN0~AN3 , SELECT-A , SELECT-B IC101 IC102 IC102 IC2 , IC3 ( DM1/2-CN3 ) ( PN1/2-CN302 ) CN101 CN301 CN301 IC104 IC10 , IC11 DOUT IC12 PB0~PB7 , SW-R0~R3 ( DM1/2-CN1 ) ( PN1/2-CN304 )
  • Page 9 CN301 CN301 CN101 IC105 IC105 IC106 IC106 IC103 IC103 LED-FOOT, SW-001 LED-REV, SW-010 LED-MOD SW-100 , SW-LINE ( DM1/2-CN2 ) ( PN1/2-CN303 ) IC112, IC113, IC114 AG-Stomp OUTPUT OUTPUT RXDO , TXDO 15 , 17 KEC-54233...

  • Page 10: Circuit Board Layout

    AG-Stomp CIRCUIT BOARD LAYOUT...

  • Page 11: Wiring

    WIRING CN301 CN304 CN303 CN310 (V611450) CNB-V698560 CN302 CN309 (V611470) (V611460) Note) When installing the DM circuit board, use care not to have the wire assembly caught by the bottom case. (V611480) AG-Stomp CN305 (V610850) CN307 CN306 CN308 CN101 W102 W101...

  • Page 12: Disassembly Procedure

    AG-Stomp DISASSEMBLY PROCEDURE Bottom Case (Manhour requirement: 5 min.) Remove the six (6) screws marked [30]. The bottom case can then be removed. (Fig. 1) Bottom [30]:Bind Head Tapping Screw-B 3.0x8 MFZN2BL (EP600190) DM Circuit Board (Manhour requirement: 15 min.) 2-1.
  • Page 13 Topcover [T70]:Washer 9.0 MFZN2Y (ET800150) [T110]:Bind Head Tapping Screw-B 3.0x8 MFZN2BL (EP600190) PN Circuit Boards (1/2, 2/2) (Manhour requirement: 20 min.) 3-1. Remove the bottom case. (See Procedure 1.) 3-2. Remove the DM1/2 and DM2/2 circuit boards. (See Procedure 2.) 3-3-1.
  • Page 14 AG-Stomp Heat Sink (Manhour requirement: 25 min.) 4-1. Remove the bottom case. (See Procedure 1.) 4-2. Remove the DM circuit board. (See Procedure 2.) 4-3. Remove the two (2) screws marked [A-a] from the soldered face of the DM circuit board and the three (3) screws marked [A-b] from IC112, IC113 and IC114.

  • Page 15: Lsi Pin Description

    LSI PIN DESCRIPTION HD6413002FP16 (XQ375A00) CPU NAME FUNCTION Port A Address bus Power supply Port B PB6//DREQ0 PB7//DREQ1 /RESO Reset Ground P90/TXD0 Transmit data (MIDI OUT) P91/TXD1 KSN-ACK P92/RXD0 Receive data (MIDI IN) P93/RXD1 KSN-RX P94/SCK0 Port 9 P95/SCK1 Port 9 P40/D0 P41/D1 P42/D2...
  • Page 16 AG-Stomp YSS910-S (XV988A00) DSP6 (Digital Signal Processor) NAME Power supply (3.3 V) Ground System master clock input (60 MHz or 30 MHz) System master clock output (High or 30 MHz) Power supply (5 V) /SYNCI Sync. signal input /SYNCO Sync. signal output Power supply (5 V) System clock input (30 MHz) System clock output (30 MHz)
  • Page 17 YM3437C-F (XM530A00) DIT2 (Digital Format Interface Transmitter) NAME FUNCTION Ground MCLK Master clock input DIN/BCLK/WCLK format select DM1,DM0=0,0 DSP,LDSP (64 bit,LSB first) DM1,DM0=0,1stereo,DSP (64 bit,MSB first) DM1,DM0=1,0 DSP2 (128 bit,MSB first) DM1,DM0=1,1 BB (64 bit,MSB first) System reset WCIN Word clock input Digital audio serial data input Power supply (+5 V) AK4520A-VF-E2 (XT802A00) DAC &...

  • Page 18: Ic Block Diagram

    AG-Stomp IC BLOCK DIAGRAM MB3790PF(XR967A00) DM: IC4 ASSP N.C. CONTROL N.C. BAT1 BAT2 SENSE ALARM1 ALARM1 RESET RESET 74AHC32DT XZ103A00 DM: IC5, IC6 74HC244DT(XZ109A00) DM: IC14, IC15, IC16 Bus Buffer VDD(Vcc) (GND)Vss CONTROL 590k Reference Voltage 1.24V Power Supply Circuit SENSE 240k V th:3V...
  • Page 19 74HC374DT(XZ102A00) PN: IC301~IC307 D-FF OUT PUT CONTROL D CK CLOCK NJM5532M (XC011A00) DM: IC102, IC103 NJM4556AMT1 (XQ138A00) DM: IC105, IC106 OP AMP A OUT A IN B OUT B IN A+IN B+IN 74HC4052DT(XZ101A00) PN: IC308, IC309 Multiplexer Y-COM Y-COM X-COM X-COM AG-Stomp NJM072M(XC458A00)

  • Page 20: Circuit Boards

    AG-Stomp CIRCUIT BOARDS DM 2/2 Circuit Board INPUT MONO/TRS for POWER SUPPLY Component side DM 1/2 Circuit Board CN101: to PN1/2-CN301 DIGITALOUT COAXIAL to PN1/2-C...
  • Page 21 AG-Stomp DIGITALOUT COAXIAL POWER SUPPLY ON/OFF to PN1/2-CN302 to PN1/2-CN303 to PN1/2-CN304 Component side CNA-V717790...
  • Page 22 AG-Stomp DM 1/2 Circuit Board...
  • Page 23 AG-Stomp DM 2/2 Circuit Board Pattern side Pattern side...
  • Page 24 AG-Stomp PN 1/2 Circuit Board PN 2/2 Circuit Board LD302, LD303, LD304 and LD306 installation to PN2/2-CN306 Anode to DM1/2-CN3 PN: CNA-V776560...
  • Page 25 to DM1/2-CN2 to DM1/2-CN1 Component side Component side AG-Stomp to DM1/2-CN103...
  • Page 26 AG-Stomp PN 1/2 Circuit Board PN 2/2 Circuit Board to SW to SW...
  • Page 27 AG-Stomp Pattern side to PN1/2-CN305 to SW o SW to SW Pattern side...

  • Page 28: Test Program

    AG-Stomp TEST PROGRAM A. CONNECTION OF TERMINALS • INPUT Monaural input • OUT L/MONO Balance output (RL 47K ) • OUT R Balance output (RL 47K ) • HEAD PHONES Stereo output (RL 33 ) • EXP. PEDAL FC7 or Connect VR of B50K. JK pin 1: MIN of VR JK pin 2: MAX of VR JK pin 3: CENTER of VR...
  • Page 29 SW Check (1) Using the UP and DOWN switches, select “1”. (This step can be skipped if “1” is already selected.) (2) Press the STORE switch. (3) Starting with the UP switch, press each switch whose LED lights up one after another. After “MIC”, “BANK”, “3”, “2”...
  • Page 30 AG-Stomp (11) Push in the EXP. PEDAL. !4 • All LED segments light up and go out, and then the checking proceeds to MIDI check. • If VR, SW or EXP PEDAL is not set at its center position, checking will result in an error and E. 0 will appear at the left end of LED.
  • Page 31 Table1 ITEM 1. INPUT sensitivity 2. INPUT sensitivity 3. INPUT sensitivity 4. INPUT sensitivity 5. INPUT sensitivity 6. INPUT sensitivity 7. INPUT sensitivity 8. INPUT sensitivity 9. INPUT sensitivity 10. INPUT sensitivity 11. INPUT sensitivity 12. INPUT sensitivity 13. INPUT sensitivity 14.

  • Page 32: Error Messages

    AG-Stomp ERROR MESSAGES If an error occurs during operation, one of the following error message numbers will appear in the display. Stop operation of the AG-Stomp and follow one of the solutions described below. : MIDI Receive Buffer Full CAUSE: Too much MIDI data is being received and the buffer is full SOLUTION: Try reducing the amount of data being sent, or break the data into smaller blocks.

  • Page 33: Midi Implementation Chart

    YAMAHA [ Acoustic Guitar Pre Amplifier ] Model AG stomp MIDI Implementation Chart +----------------------------------------------------------------------+ Function ... : :-------------------+----------------+----------------+----------------: :Basic Default : 1 - 16 :Channel Changed : 1 - 16 :-------------------+----------------+----------------+----------------: Default : 1,3 :Mode Messages Altered : ************** : x...

  • Page 34: Parts List

    ACOUSTIC GUITAR PRE-AMPLIFIER PARTS LIST CONTENTS OVERALL ASSEMBLY ELECTRICAL PARTS Notes : DESTINATION ABBREVIATIONS A : Australian model B : British model C : Canadian model D : German model E : European model F : French model H : North European model I : Indonesian model J : Japanese model WARNING...
  • Page 35 AG-Stomp OVERALL ASSEMBLY T40b T120 T130 T160 T150 T110 T40a T140 T170 T110 T100 T110...
  • Page 36 PART NO. DESCRIPTION REF NO. OVERALL ASSEMBLY Overall Assembly Top Cover Assembly V 6 9 8 5 7 0 0 Bottom Case EP600190 Bind Head Tapping Screw-B V 3 6 9 4 1 0 0 Knob Spacer V 5 8 5 1 8 0 0 V 5 8 5 2 3 0 0 Knob VZ429100...
  • Page 37 AG-Stomp ELECTRICAL PARTS PART NO. DESCRIPTION REF NO. ELECTRICAL PARTS V 7 1 7 7 9 0 0 Circuit Board AAX25790 Circuit Board AAX25800 Circuit Board V 7 1 7 7 9 0 0 Circuit Board Heat Sink Bind Head Screw VB763800 VV067200 Base Post...
  • Page 38 PART NO. DESCRIPTION REF NO. C133 UR857100 Electrolytic Cap. C134 UX061220 Ceramic Capacitor(chip) C135 V 6 1 9 7 0 0 0 Electrolytic Cap.-BP C136 UX063100 Ceramic Capacitor(chip) C137 UR848100 Electrolytic Cap. C138 UR848100 Electrolytic Cap. C139 UR857100 Electrolytic Cap. C140 Ceramic Capacitor(chip) UX061220...
  • Page 39 AG-Stomp PART NO. DESCRIPTION REF NO. XZ108A00 XV988A00 XU965A00 IC10 XV077A00 IC10 XV077B00 IC10 XV839A00 IC11 XV077A00 IC11 XV077B00 IC11 XV839A00 IC12 XQ375A00 IC13 VN686000 Photo Coupler IC13 VR903700 Photo Coupler IC14 XZ109A00 XZ109A00 IC17 XM530A00 IC101 XC458A00 IC102 XC011A00 IC103 XQ138A00 IC104...
  • Page 40 PART NO. DESCRIPTION REF NO. RG004470 Carbon Resistor(chip) RG004750 Carbon Resistor(chip) R101 RG007100 Carbon Resistor(chip) R102 RG009100 Carbon Resistor(chip) R103 RG006470 Carbon Resistor(chip) R104 RG004330 Carbon Resistor(chip) R105 RG007100 Carbon Resistor(chip) R106 Carbon Resistor(chip) RG006330 R107 RG007100 Carbon Resistor(chip) R108 RG007100 Carbon Resistor(chip) R109...
  • Page 41 AG-Stomp PART NO. DESCRIPTION REF NO. R170 RG006470 Carbon Resistor(chip) R171 RG006470 Carbon Resistor(chip) R172 V 7 4 9 1 8 0 0 Metal Oxide Film Resistor R173 V 7 4 9 1 8 0 0 Metal Oxide Film Resistor R174 RG008100 Carbon Resistor(chip)
  • Page 42 PART NO. DESCRIPTION REF NO. -367 RG006100 Carbon Resistor(chip) R368 RG007100 Carbon Resistor(chip) R369 RG007100 Carbon Resistor(chip) R370 RG005560 Carbon Resistor(chip) -374 RG005560 Carbon Resistor(chip) R376 RG000000 Carbon Resistor(chip) SW301 VK701100 Push Switch -317 Push Switch VK701100 SW318 V 3 6 3 3 8 0 0 Rotary Switch VR301 V 5 2 6 4 8 0 0...
  • Page 43 AG-Stomp OVERALL CIRCUIT DIAGRAM 1/3 (PN 1/2 , PN 2/2) D-FF D-FF D-FF D-FF BANK FOOT SW1 FOOT SW2 FOOT SW3 AG-Stomp D-FF D-FF D-FF to DM1/2-CN1 to DM1/2-CN2 (P3.K3) (P3.K4) FREQ. MIC TYPE BLEND STEREO VOLUME BASS MIDDLE TREBLE FOOT SW BANK MULTIPLEXER KEC-54234...
  • Page 44 AG-Stomp OVERALL CIRCUIT DIAGRAM 2/3 (DM) OPAMP REGULATOR AG-Stomp ADC & DAC OPAMP OPAMP INVERTER SHIFT D-FF REGISTANT B.COUNTER INVERTER REGULATOR REGULATOR REGULATOR AG-Stomp OPAMP OPAMP OPAMP OPAMP OPAMP OPAMP from A (P3.A4) to B (P3.A6) NJM78M05DLA (XZ162A00) NJM7805FA (XJ607A00) DM: IC111 DM: IC112 REGULATOR +5V...
  • Page 45 AG-Stomp OVERALL CIRCUIT DIAGRAM 3/3 (DM) SRAM SRAM FLASH ROM from B (P2.K6) to A (P2.K6) DSP6 AG-Stomp ASSP DRAM DRAM REGULATOR AG-Stomp PHOTO COUPLER BUFFER to PN1/2-CN304 (P1.E5) BUFFER to PN1/2-CN303 (P1.E5) BUFFER to PN1/2-CN302 (P1.G8) INVERTER BUFFER AG-Stomp...

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