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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 ............................
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AG-Stomp IMPOR TANT NOTICE 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. WARNING : Failure to follow appropriate service and safety procedures when servicing this product may result in per- sonal injury, destruction of expensive components an
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AG-Stomp SPECIFICATIONS Digital Section • Full Digital Signal Processing Connections • Mic Simulator: 8 Types INPUT: Standard Stereo Phone Jack • Feedback Reduction: 5-band OUTPUT L/MONO, R: Standard Stereo Phone Jack (TRS Bal • Digital Effects anced) • Limiter PHONES: Standard Stereo Phone Jack • Digital Chorus, Digital Delay EXP. PEDAL: Standard Stereo Phone Jack • Hall Reverb, Room Reverb, Plate Reverb DIGITAL OUT: COAXIAL • External Controller Function (EXP Pedal/MIDI): 8 Controllers/ MIDI I
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AG-Stomp 4
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AG-Stomp PANEL LAYOUT Top Panel Effect Section Display & Main Section Pre-Amplifier Section Foot Switch Section Display & Main Section UP Button 1 DOWN Button 2 MANUAL Button 3 e UTILITY Button 4 q STORE Button r 5 Display 6 w t y 5
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AG-Stomp Pre-AmpSection !2 u i o !0 !1 7 MIC TYPE Select Switch (MIC TYPE) 8 BLEND Control (BLEND/STEREO) 9 VOLUME 10 Tone Controls 11 OUTPUT Level Control 12 SHIFT Button Effect Section !3 !5 !8 @2 !4 !6 !7 !9 @0 @1 @3 13 LIMITER Button 14 LEVEL 15 Feedback Reduction Buttons 16 Frequency Control (FREQ) 17 DEPTH Control 18 CHORUS/DELAY Effect Buttons 19 SPEED/TIME Control 20 DEPTH/FEEDBACK Control 21 LEVEL 22 Reverb Effect Buttons 23 REVERB Volume 6
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AG-Stomp Footswitch Section @4 @5 24 Footswitches 1, 2, 3 25 Bank Switch (AUTO F.R./BANK/TUNER) Rear Panel @6 @7 @8 @9 #0 #1 #2 #3 #4 #6 #5 26 Power Switch (STAND-BY ON/OFF) 27 Power Adaptor Jack (AC IN 12V 1A) 28 Guitar Power Supply Switch 29 MIDI OUT Jack 30 MIDI IN Jack 31 Digital Output Jack (DIGITAL OUT) 32 EXP. PEDAL Jack 33 Headphone Jack (PHONES) 34 Output Jacks (OUTPUT R, L/MONO) 35 INPUT Jack 36 Input MUTE Switch 7
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AG-Stomp BLOCK DIAGRAM A DM 2/2 PN 1/2 DM 1/2 1 IC101 IC102 IC102 CN101 CN301 3 CN301 CN 7 3 1 21 67 5 26 4 2 6 W101 3 27 W102 IC104 4 X1 , , IC2 IC3 IC10 IC11 X2 IC1 IC8 DOUT 16 IC12 , , , AN0~AN3 SELECT-A SELECT-B PB0~PB7 SW-R0~R3 ( ) ( ) DM1/2-CN3 DM1/2-CN1 (PN1/2-CN304) PN 1/2 (PN1/2-CN302) PN 2/2 A' 8
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AG-Stomp A PN 1/2 1 CN301 IC105 CN301 CN101 7 2 5 3 1 IC105 1 3 OUTPUT IC106 1 2 3 3 1 IC106 -1 7 6 OUTPUT IC103 2 1 3 3 1 IC103 7 6 2 3 1 LED-FOOT, SW-001 RXDO, TXDO , 15 17 LED-REV, SW-010 LED-MOD SW-100, SW-LINE (DM1/2-CN2) (PN1/2-CN303) PN 2/2 IC112, IC113, IC114 KEC-54233 A' 9
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AG-Stomp CIRCUIT BOARD LAYOUT DM 1/2 DM 2/2 PN 1/2 PN 2/2 10
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AG-Stomp WIRING PN 1/2 CN301 CN302 CN305 CN304 CN303 (V610850) CN307 PN 2/2 CN306 CN310 CN309 CN308 (V611470) (V611460) (V611450) Note) When installing the DM circuit board, use care not to have the wire assembly caught by the bottom case. CN1 CN2 CN3 DM 1/2 CN101 (V611480) W102 W101 DM 2/2 CNB-V698560 1 11
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AG-Stomp DISASSEMBLY PROCEDURE 1. Bottom Case (Manhour requirement: 5 min.) Remove the six (6) screws marked [30]. The bottom case can then be removed. (Fig. 1) Bottom [30] [30] [30]:Bind Head Tapping Screw-B 3.0x8 MFZN2BL (EP600190) Fig.1 2. DM Circuit Board (Manhour requirement: 15 min.) 2-1. Remove the bottom case. (See Procedure 1.) 2-2. DM1/2 Circuit Board (Manhour requirement: 10 min.) Remove the one (1) screw marked [T110A], three (3) screws marked [T120], four (4) hexagonal nuts marked [
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AG-Stomp Topcover [T70] DM 2/2 DM 1/2 [T110B] [T70]:Washer 9.0 MFZN2Y (ET800150) [T110]:Bind Head Tapping Screw-B 3.0x8 MFZN2BL (EP600190) Fig.2 3. 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. PN 1/2 Circuit Board (Manhour requirement: 10 min.) Remove the controls, knobs and hexagonal nuts from the front panel, the three (3) screws marked [T110] and the shield
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AG-Stomp 4. 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. The heat sink can then be removed from the DM circuit board. (Fig. 4) Heat Sink [A-a] IC114 IC113 [A-b] IC112 [A-a] Fig.4 14
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AG-Stomp LSI PIN DESCRIPTION HD6413002FP16 (XQ375A00) CPU DM: IC12 PIN PIN NAME I/O FUNCTION NAME I/O FUNCTION NO. NO. 1 PA6 O Port A 51 A12 O 2 PA7 O Address bus 52 A13 O 3 VCC Power supply 53 A14 O 4 PB0 I 54 A15 O Address bus 5 PB1 I 55 A16 O 6 PB2 I 56 A17 O 7 PB3 I 57 A18 O Port B 8 PB4 I 58 A19 O 9 PB5 I 59 VSS Ground 10 PB6//DREQ0 I 60 P60//WAIT I 11 PB7//DREQ1 I 61 P61//BREQ I Port 6 12 /RESO O Reset 62 P62//BACK I 13 VSS Ground 63 Ø O Øout 14 P90/TXD0 O Transmit data (MIDI OUT) 64 /STBY
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AG-Stomp YSS910-S (XV988A00) DSP6 (Digital Signal Processor) DM: IC8 PIN PIN NAME I/O FUNCTION NAME I/O FUNCTION NO. NO. 1 Vdd Power supply (3.3 V) 89 Vss Ground 2 Vss Ground 90 DB13 I/O 3 XI I System master clock input (60 MHz or 30 MHz) 91 DB14 I/O 4 XO O System master clock output (High or 30 MHz) 92 DB15 I/O 5 Vdd Power supply (5 V) 93 DB16 I/O 6 /SYNCI I Sync. signal input 94 DB17 I/O Parallel data bus 7 /SYNCO O Sync. signal output 95 DB18 I/O 8 Vdd Power supply (5 V) 96 DB19 I/O 9 CKI
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AG-Stomp YM3437C-F (XM530A00) DIT2 (Digital Format Interface Transmitter) DM: IC17 PIN PIN NAME I/O FUNCTION NAME I/O FUNCTION NO. NO. 1 Vss Ground 9 MUTE I Mute 2 MCLK I Master clock input 10 VFL I Validity flag 3 DM0 I DIN/BCLK/WCLK format select 11 CCK I C,U bit clock input/C bit data input 4 DM1 I DM1,DM0=0,0 DSP,LDSP (64 bit,LSB first) 12 CIN I C,U bit data input/U bit data input 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 fir
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AG-Stomp IC BLOCK DIAGRAM MB3790PF(XR967A00) DM: IC4 ASSP R CN 0.5W 3 V OUT V IN 14 V IN 13 100W 4 V OUT 16 CONTROL SBD N.C. 1 16 CONTROL 590kW V IN Reference 2.65V V BAT1 2 15 N.C. Voltage ALARM1 6 1.24V Power Supply V OUT 3 14 V IN 500W Circuit V IN V OUT 4 13 V IN 3m A S Q V SENSE 12 2.37V 7 ALARM2 V BAT2 5 12 V SENSE ALARM1 6 11 C T R V OUT 9 ALARM1 7 10 RESET RESET 240kW V th:3V GND 8 9 RESET V OUT 10 RESET V th:1.5V GND 8 11 5 2 74AHC32DT(XZ103A00) 74HC08D
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0Y B AG-Stomp 74HC4052DT(XZ101A00) NJM072M(XC458A00) 74HC374DT(XZ102A00) PN: IC308, IC309 DM: IC101 PN: IC301~IC307 Multiplexer OP AMP D-FF +DC Voltage Output A OUT PUT 1 20 VCC 1 8 Supply CONTROL – + Inverting 1 2 Output B 1Q 2 Q Q 19 8Q OY 16 VDD 7 Input A OE OE Non-Inverting Inverting 1D 3 DCK CK D 18 8D 2 15 3 2Y 2Y 2X 2X 6 Input A Input B –DC Voltage Non-Inverting 3 2D 4 17 7D 14 4 –V CK CK Y-COM Y-COM 1X 1X 5 D D Supply Input B OE OE 2Q 5 7Q 4 Q Q 16 13 3Y 3Y X-COM X-COM 3Q 6 Q 15 6Q 5 12
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AG-Stomp CIRCUIT BOARDS A DM 2/2 Circuit Board DM 1/2 Circuit Board INPUT DIGITALOUT MONO/TRS for COAXIAL POWER SUPPLY Component side CN101: to PN1/2-CN301 to PN1/2-C A' 20
