Akai AJ-P4270R Service Manual

Browse online or download Service Manual for Synthesizer Akai AJ-P4270R. Akai AJ-P4270R Service manual User Manual

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Summary of Contents

Page 1 - DIAGRAM

PROGRAMMABLE POLYPHONIC SYNTHESIZER MODEL AXOO SECTION 1 SERVICE MANUAL SECTION 2 PARTS LIST SECTION 3 SCHEMATIC DIAGRAM SECTION 4 SERVICE BULLETIN

Page 2 - SERVICE

6-3. BALANCE OF BBD OUTPUT ON THE CHORUS PC BOARD J2 J3 ICI3 TPI >IC4l > IC5 > ice I > ic9 I IC10 VR2 I BALANCE I kHz AUDIO SIGNAL FROM

Page 3 - INSTRUCTION

VII. PC BOARD TITLES AND IDENTIFICATION NUMBERS VIII. MIDI IMPLEMENTATION CHART MIDI Implementation Chart Version : 1.0 Mode 1 : OMNI ON, POLY Mode 2

Page 4

SECTION 2 PARTS LIST TABLE OF CONTENTS RECOMMENDED SPARE PARTS LIST 13 1. PC BOARD BLOCK 14 2. VOICE PC BOARD 14 3. CPU PC BOARD 14 4. CHORUS PC BOARD

Page 5 - SPECIFICATIONS

HOW TO USE THIS PARTS LIST 1. This Parts List lists those parts which are considered necessary for repairs. Other common parts, such as resistors and

Page 6 - DISMANTLING

RECOMMENDED SPARE PARTS LIST Because, if the parts listed below are on hand, almost any repair can be accomplished, we suggest that you stock these Re

Page 7 - CONTROLS

1. PC BOARD BLOCK 2. VOICE PC BOARD 3. CPU PC BOARD REF. NO. 3-1 3-IC7 3-BT1 PART NO. DESCRIPTION EJ-358691 SOCKET IC DILB28P-8J ASSEMBLY BLOCK EI-364

Page 8 - PfffTtTT

7. POWER SUPPLY PC BOARD REF. NO. 7-IC1 7-IC2 7-IC3 7-IC4 7-TR1.3 7-TR2 7-TR4to6 7-D1 7-D2 7-D3,5, 6,12 7-D4 7-D7 7-D9,11 7-D13 7-VR1 7-FR1.2 7-R1 7-R

Page 9 - ADJUSTMENT

ASSEMBLY BLOCK 15 14 I 2 17 SW902 1 ! ' i A(SW90l) 16 -PARTS LIST-

Page 10 - CLIPPING

FINAL ASSEMBLY BLOCK 10. ASSEMBLY BLOCK npr £q PART NO. DESCRIPTION 10-1 EW-524845 A AC CORD 2 CORES VM1165B, VFFJ(J) 10-1A EW-358858 A AC CORD 2 CORE

Page 11 - IMPLEMENTATION

INDEX AX60 -PARTS LIST-

Page 12

ABBREVIATIONS FOR THE SERVICE MANUAL

Page 13 - Symbols

AX60 -PARTS LIST-19

Page 15 - EJ-358691

AKAI MODEL AX60 SECTION3 SCHEMATIC DIAGRAM AND PC BOARD TABLE OF CONTENTS 1. POWER PC BOARD , 2. CONNECTION DIAGRAM 3. CONTROL BLOCK DIAGRAM 4. VOICE

Page 16 - ASSEMBLY

3 B CHORUS PCB LI0I2B5030 8 H* •I=PNP TRANSISTOR 8 !•!• m\zHPH TRANSISTOR TRI,2,3,8,I8 --2SK38KC.D) TR3.4.I2,13,16,17 -2SC333O(T,U) TR6,7,II,I3 -2SAI3

Page 17 - A(SW90l)

LOC AT I ON OF COMPONENTS | IC*f ICI 61 IC2 62 IC3 63 IC4 64 IC5 61 IC6 61 IC7 61 IC8 -—62 IC9 62 IC10— 62 ICII G2 ICI2 62,3 ICI3---G3 ICI4---G3 ICI5

Page 18 - LTBS2FBS(B)

TRI 2SC3400 TR2.3—2SC3383 CPU PCB LI0I2A5020

Page 19

74HC38 74HC138 74HC139 74LS42 74LS04 74LS05 MN3009 74LS373N TC4066 CEM3394 TC4051 MD62705 MN3101 OUMUBL CTUOPT *n *n

Page 20

POWER SUPPLY PCB LI0I2B5050 K»J=PNP TRANSISTOR •|=NPN TRANSISTOR i: in o: out 6: 6ND NJM79MI5A M5236L NJM78MI5A 2SB89K0.R) 2SOII89(O,R) 2SC333O(TtU)

Page 21

SECTION 4 SERVICE BULLETIN O This section describes the information on techniques revisions and troubleshooting for ser vicing and adjusting AX60. O T

Page 22

MODEL: AX60 No. MS-0008 DATE: March 1986 001 Subject: To improve performance The ROM IC program has been changed to improve the following points. 1.

Page 23 - TRI7—A3,4

SAFETY INSTRUCTION SAFETY CHECK AFTER SERVICING Confirm the specified insulation resistance between power cord plug prongs and externally exposed part

Page 24 - ICI8---G4

MODEL: AX60 INDEX

Page 25 - TR2.3—2SC3383

B C tX60 OPERATION(A) PC8 LI0I2A5040 9»J 81 POWER SUPPLY) LINE B

Page 26 - MD62705

OPERATION(B) PCB LI0I2A5060 NOTE UNLESS OTHERWISE SPECIFIED ALL RESISTORS Hi OHMS 1/4WU) ALL CAPACITORS IN mf SOWVO) 2SAI3I7 AX60 OPERATION(A)/(B) SCH

Page 27 - LI0I2B5050

B AX 60 04 MPUT SELCCT |Sj LFOl.t \7\ CHOWS 0*>0FF hj CS8 CSO 100/29! Ml 100/281 Ml —a—t 3— tSS» IT. oi > ICS MN3J0I C CHORUS PCB LI0I2B5030 IBi

Page 28 - BULLETIN

61 IKOICATEO VOLTAGES ARE MEASURED AT CHORUS " I" MOOE ® a PULSE NOTE UNLESS OTHERWISE SPECIFIED ALL RESISTORS IN OHMS 1/4WO) ALL CAPACITORS

Page 29

UU: ssssasts 1 'I JD_ II (SAV?1 IVERlfYl iii II h I SAMPLER II m TOCNKt PS 4 OPERATION (A) PCB H0I2A5040 to cvu pci . n cro ret -VCF-3$ -EMVELOPE

Page 33 - 2SC340I

H r: \\\\\\\ a * OB®—' -1 -I h 35 C4t O.OOllZl PEDAL SUSTAIN ARPEGGIO EXT SYNC TAPE OUT .. ICI4 (4/« -8 I TC74HC32P ' MEMORY pROTECT CPU PCB

Page 34 - SCHEMATfC

SECTION 1 SERVICE MANUAL TABLE OF CONTENTS I. SPECIFICATIONS 4 II. DISMANTLING OF UNIT 5 1. HOW TO OPEN THE FRONT PANEL 5 2. HOW TO DISMANTLE THE KEYB

Page 35 - H0I2A5040

<n o o m o CD o ro en o 71 l -2 3 "1 5

Page 36

I i ) FILTER MOD ID) CV I \ OWAVE 8ELCCT (U) CV I Svcp-I cv Hvca-s cv ^resonance iu) cv Sa-b balance ioi cv OfiXT IM ON/OFF AkOISE IN ON/OFF 1 r r j j

Page 37

B OPERATION (A) PCB LI0I2A5040 liS ?i« —-— — — —— [operation switchedes "I I I OPERATION (B) PCB LI0I2A5060 CPU PCB LI0I2A5020

Page 38

0D> p Sen 00OQ TO VOICE PCBP3 TO POWER SUPPLY PCB I TO CHORUS PCBW9 TO VOICE PCB PI I

Page 39 - TC74HC32P

B OPERATION(B) PCB LI0I2A5060 OPERATION(A) PCB LI0I2A5040 VOICE PCB LI0I2A50I0 CHORUS PCB LIOI2B5O3O I | U/L MIX | 1H4—^, I , oovACfpi ▲ n fuse I I

Page 40 - ■"1

H POWER SUPPLY PCB LI0I2B5050 AX60 CONNECTION DIAGRAM no.5-1 8602I2A H

Page 41

I. SPECIFICATIONS MODEL AX60 -SERVICE MANUAL-

Page 42

2-2. HOW TO DISMANTLE THE KEYBOARD (Refer to Fig. 2-2 and Fig. 2-3) 1) Remove 6 screws on the Bottom plate, and disconnect the connectors PI and P2 on

Page 43

III. CONTROLS LFO PARAMETER SET-UP KNOBS DEPTH: Sets the modulation intensity SPEED: Sets the modulation frequency. DELAY: Sets the amount of time for

Page 44

IV. THE KEYBOARD REACTION-SHIP TO EQUALLY TEMPERED SCALE FREQUENCIES AND MUSICAL-NOTATION. -Piano keyboard -oeofE mil ii??° »e?1 PfffTtTT CoD<^oFoG

Page 45

VI. ADJUSTMENT 6-1. BALANCE OF ± 6V ON THE POWER SUPPLY PC BOARD 1) Connect a Digital DC Voltmeter between Pin [T] (+6V) and Pin 0 (GND) of connector

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