Mode d'emploi AKAI AT 901

[. . . ] HOW TO DISMANTLE THE BEND PANEL BLOCK III. CONTROLS 5 6 IV. V. VI. THE KEYBOARD REACTION-SHIP TO EQUALLY TEMPERED SCALE FREQUENCIES AND MUSICAL-NOTATION PRINCIPAL PARTS LOCATION ADJUSTMENT 7 7 8 1. BALANCE OF ±6V ON THE POWER SUPPLY PC BOARD 8 2. OFF-SET OF FINAL VCA ON THE VOICE PC BOARD 8 3. [. . . ] Sets the amount of time (T3) after a key is released. To change the pitch PITCH BEND WHEEL — RELEASE: CUT OFF FREQUENCY CONTROL KNOB — NOISE and SAMPLE!I INPUT CONTROL BUTTONS To select the Bank and Preset Number. DEPTH LEVEL: Sets the overall amplitude of the maximum deflection and also the sustain level. PROGRAM SELECT BUTTON when it rotated to "MAX" direction. MODULATION WHEEL The modulation wheel has no effect when it rotated to "MINI" direction, add modulation SPLIT MODE ON/OFF BUTTON NUMERIC DISPLAY To Select Tape Interface. To Sets and Select Split preset CATORS SPUT MODE SELECT BUTTON and INDI VCO WAVEFORM SELECT BUTTON and INDICATORS - WRITE BUTTON COMPERE/EDIT SELECT BUTTONS and INDICATORS RECAUJKEY TRANS - CASSETTE INTERFACE SELECT BUTTON Fig. THE KEYBOARD REACTION-SHIP TO EQUALLY TEMPERED SCALE FREQUENCIES AND MUSICAL-NOTATION. - Piano keyboard - oeofE mil CoD<^oFoGoMoClD, ElF, 61A)B1CAEaF262A2B2C303E3F3G3A3B3C, CU^F4MAC9D9E9F9G5As% PfffTtTT ii??° »e?1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I | I I I !* 5 & S - 8 2 S 5 3 = » 5 15 ^ 5 £ ♦ S « IS * S * S 5 S S S 2 S g " " " " " " "-" -M-N -ro-w-l--w -* *??? »S*SoS*«°**5o*°S--oo*wae»t5o5i*o*»«o«Hj, ^ul|0^00, ow0ffl00_owo^«oo-tow . » SSSS SIS *^S S^ So= g« £8g no II "no> III oo II ico III oo || ^i< |ll II III n m ii in y!»it in \i m in ii mi ii i ii •^Keyboard Coverage by Frequency Range Setting 32 16 i- *• ». •--* Co-Cs 8 4 Piano 2 C. -Ce C2-C7 Cj-Ca C4-C9 Fig. 4-1 V- PRINCIPAL PARTS LOCATION CHORUS PCB LIOI2B5O3O OPERATION (B) LIOI2A5O6O PCB LI0I2A5040 OPERATION(A) PCB POWER TRANSFORMER FILTER PCB L600I05080 POWER SUPPLY LI0I2BS050 PCB Fig. BALANCE OF ± 6V ON THE POWER SUPPLY PC BOARD Fig. 6-1 POWER SUPPLY PCB Adjustment Points 1) Connect a Digital DC Voltmeter between Pin [T] (+6V) and Pin 0 (GND) of connector P4 on the POWER SUPPLY PCB as shown Fig. 6-1. Digital DC Voltmeter to Pin [4]. 3) Adjust VRI so that the Voltage Value at Pin | land 2) Read the + Voltage Value at the Pin [T|, and connect a Pin GQ are equal or within ± 0. 1V. 6-2. OFF-SET OF FINAL VCA ON THE VOICE PC BOARD TP. O <J piC44 FOFF SET IC42 TP2 0 JiVRS J/OFF SET Fig. 6-2 VOICE PCB Adjustment Points 1) Set the ENVELOPE GENERATOR to VCA mode and set the EG DEPTH Control to maximum posi tion. and adjust VR7 so that the Digital Voltmeter Read 0 ±2mV. 2) Connect a Digital Voltmeter between TP1 and GND 3) Connect a Digital Voltmeter between TP2 and GND and adjust VR8 as same manner as VR7. -SERVICE MANUAL- 6-3. BALANCE OF BBD OUTPUT ON THE CHORUS PC BOARD J2 J3 •L >IC4l > IC5 ICI3 TPI > ice I IC10 I BALANCE > ic9 I CLIPPING LEVEL VR2 ■ I kHz AUDIO SIGNAL FROM OSC CLIPPING LEVEL Fig. 6-3 CHORUS PCB Adjustment Points and Instrument Connection 1) Set CHORUS switch to "2". 2) Connect an oscilloscope between TPI and GND on the CHORUS PC Board. Fig. 6-4 the oscilloscope is clipped a bit. 4) Adjust VR1 so that the Clipping level at upper side and lower side of the waveform are the same clipping level. 5) Connect an oscilloscope between TP2 and GND, and adjust VR2 as same manner as VR1. 3) Connect an Audio Signal Generator to Pin [I] and||] of connector PI on the CHORUS PC Board, and supply 1 kHz Audio Sine wave signal, and Adjust output level control of Audio Generator, so that the waveform on 6-4. OFF-SET OF IC6 (LF356) ON THE CPU PC BOARD \ VR I /off set □ Fig. 6-5 CPU PCB ADJUST POINT 1) Set to center position of VR1 on the CPU PC Board. SERVICE MANUAL- VII. PC BOARD TITLES AND IDENTIFICATION NUMBERS VIII. MIDI IMPLEMENTATION CHART MIDI Implementation Chart Version : 1. 0 Mode Mode 1 3 : : OMNI ON, OMNI OFF, POLY POLY Mode Mode 2 4 OMNI OMNI ON, OFF, MONO MONO Yes no -SERVICE MANUAL- SECTION 2 PARTS LIST TABLE OF CONTENTS RECOMMENDED SPARE PARTS LIST 1. [. . . ] Keep such information carefully under the name of this file. This Manual is TOR INTERNAL USE ONLY and most not be made available to unauthorized personal. No part of this manual may be re produced in any form without permission from AKAI-ELECTRIC CO. , LTD. , Tokyo, Japan. MODEL: 001 AX60 Subject: To improve performance No. MS-0008 DATE: March 1986 The ROM IC program has been changed to improve the following points. 1. 2. 3. AUTO TUNE AUTO MUTE other request by MIDI is recognized but up to 30 - is not 35 transmitted. up to 6 times causing request by AUTO MUTE button inoperative for is executed and the data is accepted recorded functions seconds. on the tape and that of When VERIFY AX60 4. is different whatever the reason may be, is off. the data in AX60 may be re-writen when PROTECT switch Since the position of is turned off, PITCH BEND setting VR is turned on is memorized when the unit after changing the when the unit again posistion of 5. setting VR, the MIDI even the amount of Pitch Bend for Upper effect keys MIDI is different and Lower Keys channels are from its VR position. channels are set mode is But after SPLIT released, not caceled thus AX60 Ref. [. . . ]