Roland A-70 User manual

A-70
Sept, 1997
SERVICE NOTES
TABLE OF CONTENTS Page
SPECIFICATIONS 1
DISASSEMBLY 1
LOCATION OF CONTROLS & REAR VIEW 2
EXPLODED VIEW N.1 3
EXPLODED VIEW N.2 4
KEYBOARD PARTS LIST 4
BLOCK DIAGRAM 5
MAIN PCB ASSY 6
CIRCUIT DIAGRAM (MAIN PCB ASSY) 7
PRIMARY PCB ASSY & CIRCUIT DIAGRAM 8
LEFT CONTROL PCB ASSY 8
CIRCUIT DIAGRAM (LEFT CONTROL PCB ASSY) 9
AFT PCB ASSY & CIRCUIT DIAGRAM 10
RIGHT CONTROL PCB ASSY 10
CIRCUIT DIAGRAM (RIGHT CONTROL PCB ASSY) 11
POWER PCB ASSY & CIRCUIT DIAGRAM 12
MIDI PCB ASSY 12
CIRCUIT DIAGRAM (MIDI PCB ASSY) 13
RIGHT CONTACT PCB ASSY w/RUBBER CONTACT & CIRCUIT DIAGRAM 14
LEFT CONTACT PCB ASSY w/RUBBER CONTACT & CIRCUIT DIAGRAM 14
TEST MODE 15/20
PARTS LIST 20/21
TRANSLATION FROM ENGLISH INTO JAPANESE 22/27
SPECIFICATIONS
A-70/A-70EX : Expandable controller
A-70EX Sound Section (VE-RD1)
- Sound Generator PCM synthesis
- Parts 4 Parts
- Maximum Polyphony 64 Voices.
- Effects Reverb
Chorus
Equalizer
- Preset Memory Patches : 128
A-70/A-70EX Common
- Keyboard 76 Keys
- Zones Internal : 4
External : 4
- Internal Memory System Setup : 1
User Name Maps : 4
Preset Name Maps : 9
Performances : 64
Chains : 10
Manual : 1
- Display 3 Characters (backlit LCD)
17 Characters, 2 Lines (backlit LCD)
.-Nominal Output Level Output : -7dBm.
- Output Impedance Output : 1600 Ohm.
- Recommended Load Impedance Output : 10 Kohm or Greater
- Connectors Midi Connectors (in:2, thru:1, out:4)
Foot Controller Jacks:1
Switch Jacks:1
Total Volume Pedal Jack
Hold Pedal Jack
Output Jacks [L(Mono), R]
Headphone Jack
AC Inlet (AC 100V, AC 230V, AC 240V)
- Power Supply AC 100V, AC 117V, AC 230V or AC 240V
- Power Consumption 15W (AC 100V), 17W (AC 117V)
20W (AC 230V), 20W (AC 240V)
- Dimensions 1245(W) X 357 (D) X 136 (H) mm
- Weight 16 Kg
- Accessories Pedal Switch:DP-2 (7710610000)
Owner’s Manual (E) (K6018288)
Owner’s Manual (J) (K6018291)
Midi Guide (K6018109)
Midi Implementation Manual (K6018292)
! MAINS CABLE H05VV+POL.SOCKET 230V (J3439150)
! CABLE 49B/35JT 2X18 AWG-C17 117V (J3439128)
! MAINS CABLE DC 545 J03 100V (13499108)
! CABLE BS/13/H05VV-F3G 0.75-V 230VE (13499152RI)
! CABLE SAA/3-OA3CCFC 3X0.75-V 240VA (13499150RI)
- Options Stereo Headphone : RH-20/80/120:
Pedal Switch : DP-2/6, BOSS FS 5U
Expression pedal : EV-5
Connecting Cable : PJ-1M, PCS-100PW
MIDI/SYNC cable : MSC-15/25/50
Voice Expansion board : VE series
Issued by RES
Copyright © 1997 by ROLAND CORPORATION
DISASSEMBLY
1SN00018 K6018299 Printed in Italy (AF00) (AD)
First Edition

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A-70 Sept, 1997
LOCATION OF CONTROLS & REAR VIEW

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Sept, 1997
EXPLODED VIEW N.1

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A-70 Sept, 1997
KEYBOARD PARTS LIST/ 76 KEY KEYBOARD TP/8S-AT (7699510000)
EXPLODED VIEW N. 2

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Sept, 1997
BLOCK DIAGRAM

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MAIN PCB ASSY
ASSY 7699501000
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved
fejlagtig håndtering.
Udskiftning må kun ske med batteri af
samme fabrikat og type.
Levér det brugte batteri tilbage til
leverandøren.
Apparatus containing Lithium batteries
For Nordic Countries
ADVARSEL!
Lithiumbatteri - Eksplosjonsfare.
Ved utskifting benyttes kun batteri som
anbefalt av apparatfabrikanten.
Brukt batteri returneres
apparatleverandøren.
VARNING!
Eksplosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en
ekvivalent typ som rekommenderas av
apparattillverkaren.
Kassera använt batteri enligt
fabrikantens instruktion.
VAROITUS!
Paristo voi räjähtää, jos se on
virheellisesti asennettu.
Vaihda paristo ainoastaan
laitevalmistajan suosittelemaan
tyyppiin. Hävitä käytetty paristo
valmistajan ohjeiden mukaisesti.
When you replace the MAIN BOARD or Lithium battery,
You must reperform bender adjustment.
Refer to [Bender value setting] item in the test mode.
NOTE
View from component side

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MAIN PCB ASSY CIRCUIT DIAGRAM

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LEFT PCB ASSY ASSY 7699504000
PRIMARY PCB ASSY & CIRCUIT DIAGRAM
ASSY 7699506000 230V/240V
ASSY 7699512000 100V/117V
View from component side
View from component side

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CIRCUIT DIAGRAM LEFT PCB ASSY

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AFT PCB ASSY & CIRCUIT DIAGRAM. ASSY 7699507000
RIGHT PCB ASSY ASSY 7699503000
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View from component side

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CIRCUIT DIAGRAM RIGHT PCB ASSY

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A-70 Sept, 1997
POWER PCB ASSY & CIRCUIT DIAGRAM
ASSY 7699502000
JACK PCB ASSY ASSY 7699505000
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View from component side

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CIRCUIT DIAGRAM JACK PCB ASSY

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LEFT CONTACT PCB ASSY w/RUBBER ASSY 7695005000
CIRCUIT DIAGRAM (LEFT CONT.PCB ASSY)
CIRCUIT DIAGRAM (RIGHT CONT.PCB ASSY)
RIGHT CONTACT PCB ASSY w/RUBBER ASSY 7695004000
View from component side
View from component side

A-70
Sept, 1997
TEST MODE
NOTE :Before executing test mode, be sure to backup user data as explained in the section “Saving and
loading user data.”
When you execute test mode, the various parameters will be given special settings. After executing test mode,
be sure to either load the user data, or initialize the internal RAM.
²Necessary items
DP-6 (foot pedal)
EV-5 (expression pedal)
MIDI Sequencer
MIDI cable x 2
VE-GS1 (voice expansion board)
Oscilloscope
Headphones
Devices for measurement ( mono dummy plug x 2)
²Entering test mode
While simultaneously holding down numeric keys 1, 3, and 5, turn the power on. The backup RAM and
internal battery will be checked, and the result displayed in the LCD. If there is a problem, check MAIN
BOARD IC6, 10, and BT1.
Following this, the version and test item menu will appear, and the A-70 will wait for test items to be
selected.
²Exiting test mode
Turn the power on once again to return to normal mode.
²Test items
The A-70/EX has the following test items.
Each test item is assigned to the following data entry keys.
Press the appropriate number to enter the corresponding test item. For details on each test, refer to the
explanations for each item.
0 : Version and test item menu display
1 : SW/LED test
2 : LCD test
3 : Slider VR test
4 : Pedal test
5 : Bender value setting
6 : Bender/wheel test
7 : MIDI test
8 : Not Available
9 : Keyboard test and audio signal output test
0 : Version and test item menu display
Summary : Display the version and test items in the LCD
Procedure : Press numeric key 0 to display the menu.
ê
The system program version and the test item menu will be displayed.
ê
The test program will wait for an item to be selected.
1 : SW/LED test
Summary : Check LED and switch operation
Procedure : Press numeric key 1 to enter the SW/LED test item.
ê
All LEDs will light. Check that there are no LEDs that fail to light.
(If there is a problem, refer to check 1.)
ê
Press each SW, and check that each of the corresponding LEDs or LCD characters go dark.
(If there is a problem, refer to check 1.)
ê
This completes the SW/LED test.
NOTE:To exit the SW/LED test item and go to another item, hold down ENTER and press the numeric key
corresponding to the desired test item.
Action :
check 1 :
PANEL L BOARD SW/LED
PANEL R BOARD SW/LED
PANEL L BOARD IC709, 710
PANEL R BOARD IC201
PANEL L BOARD CN707 <=> MAIN BOARD CN8
PANEL R BOARD CN201 <=> MAIN BOARD CN5
MAIN BOARD IC12
2 : LCD test
Summary : Check for unevenness or defects in the LCD and the operation of the contrast control circuit
Procedure : Press numeric key 2 to enter the LCD test item.
ê
All pixels of the LCD will light. Check that there is no unevenness or defect in the LCD.
(If there is a problem, refer to check 1.)
ê
Check that the contrast of LCD changes by pressing the INC/DEC button (or moving the DATA ENTRY
slider).
(If there is a problem, refer to check 1.)
ê
This completes the LCD test.
Action :
check 1 :
LCD UNIT
LCD UNIT <=> MAIN BOARD CN6
MAIN BOARD IC12
3 : Slider VR test
Summary : Check the operation of the slider VRs.
Procedure : Press numeric key 3 to enter the slider VR test item.
ê
15

Raise and lower the six sliders TOTAL through DATAENTRY, and check that the value changes from
0—10 in correspondence to the slider movements.
(If there is a problem, refer to check 1.)
ê
This completes the slider VR test.
Action :
check 1 :
L BOARD BR702...706, IC707, 708
R BOARD VR201
PANEL L BOARD CN705 <=> MAIN BOARD CN11
PANEL R BOARD CN201 <=> MAIN BOARD CN5
MAIN BOARD IC7
4 : Pedal controller test
Summary : Check the operation of the pedal controller.
Procedure : Press numeric key 4 to enter the pedal controller test.
ê
Connect the EV-5 to FC, and TOTAL VOL and move the pedal,checking that the displayed “FC”, and
“Vo” values change from 0—10.
(If there is a problem, refer to check 1.)
ê
Connect the DP-6 to FS, and HOLD and move the pedal, checking that the displayed “FS” and “Hold”
values change from “O” to “-”.
(If there is a problem, refer to check 2.)
ê
This ends the pedal/breath controller test.
Action :
check 1 :
JACK B BOARD JK 117, 118
JACK B BOARD CN101<=> PANEL L BOARD CN706
PANEL L BOARD IC708
PANEL L BOARD CN705 <=> MAIN BOARD CN11
MAIN BOARD IC7
check2 :
JACK BOARD JK 115, 116
JACK BOARD CN102 <=> MAIN BOARD CN4
MAIN BOARD IC7
5 : Bender value setting
Summary : Specify the dead region at the center of the bender
Procedure : Press numeric key 5 to enter the bender setting item.
ê
The MIN and MAX values of the current dead area will be displayed.
Lower the bender all the way to the left, gradually return it to the center and press TRANSPOSE to set
the MIN value.
ê
Raise the bender all the way to the right, gradually return it to the center and press PORTAMENTO to
set the MAX value.
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A-70 Sept, 1997
ê
This completes the bender settings.
TRANSPOSE MONO PORTAMENTO
NOTE: After setting the bender values, be sure to perform
the bender/wheel test to check operation.
* If after performing the bender/wheel test you were
unsuccessful in making the setting, use the following
procedure to manually set the dead region.
$Manual adjustment of the dead region
1. Use the “<” cursor key to select MIN setting mode.
2. Use the “>” cursor key to select MAX setting mode.
3. Use the INC and DEC keys to increase/decrease the setting.
6 : Bender/wheel test
B- IB+ IBm IW+ IW- IWm I
(1) (2) (3) (4) (5) (6)
Summary : Check the operation of the bender and wheels.
Procedure : Press numeric key 6 to enter bender/wheel test mode.
ê
Move the bender toward the left and check that (1) in the diagram changes from 0 to over 6(See
NOTE1).
When the bender is released, the value should be 0.
(If there is a problem, check the bender value setting, and the items of check 1.)
ê
Move the bender toward the right and check that (2) in the diagram changes from 0 to over 6(See
NOTE1).
When the bender is released, the value should be 0.
(If there is a problem, check the bender value setting,and the items of check 1.)
ê
Move the bender toward the rear and check that (3) in the diagram changes from 0 to over 6(See
NOTE1).
(If there is a problem, check the items of check 1.)
ê
Move wheel 1 toward the rear and check that (4) in the diagram changes from 0 to over 6(See NOTE1).
(If there is a problem, check the items of check 2.)
ê
Move wheel 1 toward yourself and check that (5) in the diagram changes from 0 to over 6(See NOTE1).
(If there is a problem, check the items of check 1.)
ê
Move wheel 2 toward yourself and check that (6) in the diagram changes from 0 to over 6(See NOTE1).

A-70
Sept, 1997
(If there is a problem, check the items of check 1.)
ê
This completes the bender/wheel test.
Action :
check 1 :
BENDER <=> PANEL L BOARD CN708
PANEL L BOARD IC705, 707
PANEL L BOARD CN705 <=> MAIN BOARD CN11
MAIN BOARD IC7
check 2 :
WHEEL <=> PANEL L BOARD CN701
PANEL L BOARD IC706, 707, 708
PANEL L BOARD CN705 <=> MAIN BOARD CN11
MAIN BOARD IC7
7 : MIDI test
I1 II2 IO1 IO2 IO3 IO4 I
(1) (2) (3) (4) (5) (6)
Summary : Test the operation of the MIDI IN, OUT, and THRU jacks
Procedure : Press numeric key 7 to enter the MIDI test item.
ê
Use a single MIDI cable to connect IN2 and OUT1, and check that display items (2) and (3) change
from “-” to “0”.
ê
Use another MIDI cable to connect IN1 and THRU, and check that display item (1) changes from “-” to
“0”.
(If there is a problem, refer to check 1.)
ê
Leaving the IN2/OUT1 MIDI cable connected to IN2, connect the other end of the cable successively to
OUT2, OUT3, and OUT4, and check that display items (4), (5), and (6) change from “-” to “0”.
(If there is a problem, refer to check 1.)
ê
This ends the MIDI test.
Action :
check 1 :
JACK BOARD Q110,Q111,Q112, IC101, 102, 103
JACK BOARD CN102 <=> MAIN BOARD CN4
MAIN BOARD IC11
8 : N.C.
9 : Keyboard test
Summary : Test keyboard and audio signal operation
Procedure : Press numeric key 9 to enter the keyboard test item.
ê
Press a desired key and check that the key number, on-velocity, and off-velocity are displayed correctly.
Check that the piano sound appropriate for each key is output.*
(If there is a problem, refer to check 1.)
ê
Apply pressure to a desired key, and check that aftertouch changes in the range 0 to over 6(See NOTE1).
(If there is a problem, refer to check 2.)
ê
This ends the keyboard test.
* If a VE series unit is installed in the A-70 and the OUTPUT jack is connected to an amp, a piano sound will
be heard.
Action :
check 1 :
KEYBOARD <=> MAIN BOARD CN2,3
MAIN BOARD IC1
check 2 :
KEYBOARD <=> AFT BOARD CN402
AFT BOARD CN401 <=> PANEL L BOARD CN703
PANEL L BOARD IC706, 707
PANEL L BOARD CN705 <=> MAIN BOARD CN11
MAIN BOARD IC7
9 : Audio signal output test
Summary : Check LINE-OUT (unbalanced L(MONO)) etc.
Supplementary explanations (functions) :
* Line out impedance : 1680 ohms
L(mono) impedance : 840 ohms
* If a plug is not inserted into LINE OUT R, the L and R channels will be mixed and output from LINE OUT L.
This is referred to as L(MONO).
Procedure : Turn off the power, and install the VE-GS1 into the A-70.
ê
Enter test mode, and press numeric key 9 to enter the keyboard test item.
ê
As shown in the following diagram, press the TRANSPOSE, MONO, or PORTAMENTO keys to
output a sine wave from LINE OUT.
The following table shows the values that should be detected. Check that the oscilloscope shows a
clean sine wave, and that the wave height value of each waveform is correct.
(If there is a problem, refer to check 1.)
17
Switch operation
TRANSPOSE MONO PORTAMENTO
output a sine output a sine output a sine
wawe from wawe from wawe from
LINE OUT and LINE OUT and LINE OUT and
PHONES OUT PHONES OUT PHONES OUT
L only L and R R only
`
press
`
press
`
press

Checking the output
Mute check
Procedure : Connect an amp to the line output.
Raise the amp and the INT slider volume of the A-70 to maximum.
ê
Check that when the A-70 power is turned on, there is no pop noise from the amp and the LCD is not
garbled.
(If there is a problem, refer to check 1.)
ê
Check for the same items when the power is turned off.
Headphone output check
Procedure : Turn off the power, and connect headphones and the VE-GS1 to the A-70.
ê
Enter test mode, and press numeric key 9 to enter the keyboard test item.
ê
Press the TRANSPOSE, MONO, and PORTAMENTO switches and check that sound is output from the
headphones as shown in the following table.
(If there is a problem, refer to check 2.)
ê
Continue with the volume check.
Press the MONO switch, and move the INT slider volume from top to bottom, and check that the sound
does not crackle or break.
(If there is a problem, refer to check 3.)
ê
Mono Stereo
Switch operation
TRANSPOSE MONO PORTAMENTO
VOUT
No Output
Vpp=2,5V
VOUT
No Output
Vpp=2,5V
VOUT VOUT VOUT
Vpp=1,25 Vpp=1,5V Vpp=1,25V
`
press
`
press
`
press
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A-70 Sept, 1997
This completes the audio output check.
Action :
check 1 :
VE-GS1 CONNECT RETRY
PANEL L <=> MAIN CN11 (CABLE)
PANEL L <=> JACK CN103 (CABLE)
MAIN IC17, IC15, IC16
PANEL L IC2
check 2 :
PANEL L <=> JACK CN103(CABLE)
MAIN Q3, Q4, Q5, Q6, Q7
MAIN DA5, DA6
PANEL L IC1
check 3 :
PANEL L VR701
SAVING AND LOADING USER DATA
You can send the contents of internal memory to a sequencer or MIDI
device that can record bulk data.
Data that has been recorded in this way can be received via MIDI IN2 at any time
* The contents of the internal memory are overwritten by any data that is received.
This procedure will save the following data to sequencer;
* Performance and Chain setting in the temporary area
* Manual mode settings
* System settings (except for controller assignments and User Name Maps)
* Controller assignment
* All performances and chains internal memory
* User Name Maps
First of all, you need to set device ID (EDIT:SYS,E01).
1. Change to the Edit mode, and use the menu or the shortcut to select
“Dev ID”
2. Use the CURSOR button to move the cursor to the right, and use DATA ENTRY to set the device ID (the
initial setting is “17”).
If you’re exchanging data between two A-70/EX units, they should both be set to the same device ID
This setting is saved automatically as a system setting.
Next, choose what you want to send and select the MIDI OUT to be used (UTILITY:BLK,U50).
3. Change the Utility mode, and use the menu or the shortcut to select
“Bulk Dump”
↑↑↑↑↑↑
abcde f
a Performance and Chain setting in the temporary area
b Manual mode settings
U50 Bulk Dump
TmpP&C TTOFF 000000
E01 Ctrl ch Dev ID
TT16 TT17
Switch operation
TRANSPOSE MONO PORTAMENTO
Heard from Heard from Heard from
only the right both sides in only the left
side in the the headphones side in the
headphones headphones
`
press
`
press
`
press
L
R
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c System settings (except for controller assignments and User Name Maps)
d Controller assignment
e All performances and chains internal memory
f User Name Maps
5. Use the corresponding MIDI OUTPUT switch to choose the MIDI OUT
6. Press [ENTER]. A confirmation message asking you if you want to sent the data appears Press [ENTER].
for “yes” or [EXIT] for “No”
INITIALIZING THE INTERNAL RAM
1. If the MANUAL button is held down while you turn the power on, the voice expansion board that is installed
will
automatically be detected, and internal RAM will be initialized for that expansion board.
If the CHAIN button is held down while you turn the power on, internal RAM will be initialized for the VE-RD1
regardless of whether or not a voice expansion board is present.
If the EDIT button is held down while you turn the power on, internal RAM will be initialized to the settings for
when an expansion board is not installed, regardless of whether a voice expansion board is present.
2. After turning on the power while holding down a button, press the ENTER button to execute the desired type
of initialization.
UPGRADING THE FLASH ROM SOFTWARE VERSION
The A-70 contains flash ROM, allowing the program version to be updated via MIDI.
Caution : If the power supply fails while flash ROM is being written into, the data in flash ROM will be
destroyed and it will be impossible to ever again rewrite it. If this occurs it will be necessary to
replace the ROM. Perform this operation in an environment where it is unlikely that the power to
the A-70 will be interrupted, or that other accidents could occur.
²Necessary items
A-70/EX software update disk SMF player (SB-55 etc. Anything that will playback SMF will do.)
Foot pedal (DP-6) x 2 (or two mono dummy (=open)plugs are also ok.) MIDI cable
* The software update disk contains the A-70 program converted into SMF data. Obtain the latest version from
the service center. The
filenames are as follows.
_00001.mid
_00002.mid
:
_00008.mid
_00008.mid will always exist, and _00001 - _00007.mid may or may not exist depending on the program size.
²Update procedure
0. As necessary, save the user memory to a sequencer. The contents of user memory will be lost during
the software update.
1. Connect pedals (or mono dummy (=open) plugs) to the HOLD and FS jacks of the A-70.
2. Connect the MIDI OUT of the SMF player to the MIDI *IN2* of the A-70.
3. Press both pedals (if you have inserted mono dummy plugs those connections will be sufficient), and
while holding down the OUT1 button turn on the power. The LCD will show as follows;
U50 Bulk Dump
Sure?
Software update completed block display area
Receive end address
Receive top address
Receive block display area
and the A-70 will enter software update mode.
4. Starting from the lowest-numbered filename, playback the files on the SMF player. (In the case of the
SB-55, playback will begin automatically from _00001.mid.)
During reception, the Receive Block / Top Address / End Address will indicate the current status.
* The Receive Block will indicate;
_00001.mid B1 (Block 1)
_00002.mid B2 (Block 2)
:
_00008.mid B8 (Block 8)
* The Receive Top/End Blocks will indicate;
_00001.mid FF0000-FFFFFF
_00002.mid FE0000-FFFFFF
:
_00008.mid F80000-FFFFFF
5. When each file has finished playing, pause the SMF player. (In the case of the SB-55, caution must be
used since the next file will begin to play.)
6. Check that the lower four digits of the Receive Top Address are 0000 and that the lower four digits of the
Receive End Address are FFFF. Then press the ENTER button of the A-70 to get a display like the
following.
Check sum display
After you confirm this by comparing the displayed value with the check sum printed on the disk label, press
the ENTER button and the software update will begin.
If the check sum is different, press the EXIT button to return to the display of step 3, and transmit the file
once again.
* When you press ENTER, the display will indicate
Erase -> Write -> CE9A-CE9A OK
During Erase or Write, be very careful to never let the power be interrupted. In the worst case, the A-70
may become incapable of starting up.
UPDATE [********]
B1 :CE9A UPDATE?
UPDATA [********]
UP :******-******
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PARTS LIST A-70 (100V/117V/230V/230VE/240VA)
SAFETY PRECAUTIONS :
The parts marked ! have
safety-related characteristics.
Use only listed parts for
replacement.
NOTE : The parts marked " #'' are new (Initial Parts).
The parts marked !have Safety - Related characteristics.
Use only listed parts for replacement.
<< EMI >> : Component for EMC.
When ordering any parts listed in the parts list,please specify the following items in the order sheet.
QTY PART NUMBER DESCRIPTION MODEL NUMBER
Ex. 10 22575241 Sharp Key C-20/50
15 2247017300 Knob (orange) DAC-15D
Failure to completely fill the above items with correct number and description will result in delayed or
even undelivered replacement.
CONSIDERATION ON PARTS ORDERING
CASING
# 7699508000 VARN+SILK. TOP CABINET A-70
# 7699509000 VARN+SILK. BOTTOM CABINET A-70
# 7699520000 VARN. RIGHT SIDE PANEL A-70
# 7699521000 VARN. LEFT SIDE PANEL A-70
# 7699519000 VARN. COVER F/EXPANSION BOARD
22205543 GUIDE F/4 POTENTIOMETERS
00788990 WHEEL CAP
# K2238119 SILKSCREENED PLEXIGLAS A-70
KNOB BUTTON
22485253 BLACK CAP F/POT.
K2478200 BUTTON GROUP 22X8+DIFF. -BLACK
K2478202 BUTTON GROUP (4) 22X8 -BLACK-
K2478203 BUTTON GROUP (4) 15X8 -BLACK-
K2478255 TRIANG. BUTTON (BLACK)
22488183 POWER SWITCH KNOB N.001-BLACK
SWITCH
1312975301 SWITCH EVQ-QSB 05K GR.160 on LB ; on RB
13129160 SWITCH SDDLB1-TV5 SW1 on PRIMARY B.
JACK, SOCKET
13449125 JACK SOCKET HLJ0520-01-110 JK115,116,119,120 on JB
13449126 JACK SOCKET HLJ0520-01-010 JK114,117,118 on JB
13429664RI DIN SOCKET MG/PR 5L JK107/113 on JB
DISPLAY UNIT
# 7699511000 LCD ASSY A-70
(Including LCD, PCB and WIRING)
NOTE : Replacement LCD Unit should be made on a unit basis. No replacements available for individual parts.
Replacement only be a unit.
BENDER UNIT
70564101 TURBOLESS PITCH BENDER PBH0201
23275893 WHEEL BW-A0000-327-893 W/CABLES
NOTE : Replacement BENDER Unit should be made on a unit basis. No replacements available for individual parts.
Replacement only be a unit.
KEYBOARD ASSY
# 7699510000 76-K.WEIGHTED KEYBOARD TP/8SAT
NOTE : For details, refer to KEYBOARD PARTS LIST (Pag.4)
PCB ASSY
# 7699502000 POWER SUPPLY PCB ASSY A-70
# 7699503000 RIGHT CONTROL PCB ASSY A-70
# 7699504000 LEFT CONTROL PCB ASSY A-70
# 7699505000 JACK SOCKET ASSY A-70
# 7699506000 PRIMARY ASSY 230/240V A-70
# 7699512000 PRIMARY ASSY 100/117V A-70
# 7699507000 BOUNCE-TO-AFTERTOUCH ASSY A-70
7695004000 RIGHT CONTACT BOARD W/RUBBER ASSY
7695005000 LEFT CONTACT BOARD W/RUBBER ASSY
# 7699501000 MAIN BOARD PCB ASSY A-70
NOTE : When you replace the MAIN BOARD or Lithium Battery, You must reperform bender adjustment. Refer to
[Bender Value Setting] item in the Test Mode.
IC
15229718RI I.C. 6N 137 Photo-Coupler IC101,102 on JB
00342723 I.C. MB90705 H Cpu FMC16 IC7 on MB
15169515 I.C. 74 HC 00 Quad 2-input NAND Gate IC201 on RB, IC709,710 on LB
15249111 I.C. TC7WU04 F (Flat) Triple Inverter IC4 on MB
00349690 I.C. UPD 65622GF-138-3B9 Custom IC IC12 on MB
00129278 I.C. SSC1080 FOB Custom IC IC1 on MB
00788356 I.C. M38881M2-058FP Sub CPU (IPC) IC11 on MB
J5259107 I.C. HM628128ALFP-7 (Flat) SRAM IC6,10 on MB
J5259110 I.C. HM62256LFP-7T (Flat) SRAM IC5,8 on MB
J5169108 I.C. TC 4052 Multip./Demultip. IC707,708 on LB
J5169107 I.C. SN 74LS32 NDS Quad 2-input OR Gate IC103 on JB
15189210 I.C. BA 5218F Dual Op. Amplifier IC13,15,16 on MB
15289710 I.C. UPD 63200GS D/A Converter IC17 on MB
15189250 I.C. M5218 AL Dual Op..Amplifier IC1,2,705,706 on LB
E
RCB = Right Contact Board MB = Main Board
LCB = Left Contact Board PSB = Power Sup. Board
JB = Jack Board RB = Right Control Board
PB = Primary Board LB = Left Control Board
AFTB = After Touch Board
20
A-70 Sept, 1997
7. When the software update is completed, the display will indicate
and the block number will appear in the software update completed block display area to indicate that block
1 has been updated.
8. Press ENTER to get a display like the following.
Now transmit the next file.
9. Repeat steps 4 through 8 until all of the files have been transmitted.
When the software has been updated for all blocks, all of the asterisks “*” will be gone from the software
update completed block display area, as in the following display.
After verifying this status, turn the power off.
²Adjustment following software update
A software update will cause the user memory of the A-70 to be lost.
Thus, the following adjustments will be necessary.
The necessary adjustments are;
Bender value setting.
Initialization of user memory.
Loading of user memory from card (as necessary).
1. Center calibration of the bender
Refer to the bender value setting (number 5) in the test items.
2. Initialization of user memory
Refer to the item for initialization of internal RAM.
As necessary, load data from a sequencer.
Refer to the items for saving and loading user memory.
UPDATA [12345678]
** :******-******
UPDATA [1*******]
** :******-******
UPDATE [1*******]
B1 :CE9A CE9A OK