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ENSONIQ ASR-10 Service Manual
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Checking the Display
ALL LEDS LIT,
NO DISPLAY
z
Are the power supply
voltages correct?
YES
*
TROUBLESHOOTING AN ASR-10
WITH ALL LEDS LIT, NO DISPLAY
Force the unit into self-test mode
Jumper the negative (left) side
Cl9 to
Din
13 of
U20.
NO
Repair and
retest.
Reulace
the
KevboardXPC
imulator board (see Section
Figure
13
-
All
LEDs
Lit, No Displav
18
ASR Service Manual
21
23
Table of Contents
Default Chapter
2
Default Chapter
2
Table of Contents
2
Important Things to Know
5
Known Areas of Concern
5
Avoid Damage from ESD (Electrostatic Discharge)
5
Simms
5
What Simms to Use
5
Figure 1 - Note the Single Jumper above the Simm Slots
6
How to Tell Which Rev Board You Have
6
What Changed
6
Figure 3 - Rear View of Panasonic Disk Drive
7
Testing the Disk Drive
7
Transporting a Unit
7
What Disks to Use
7
Figure 4 - Correct Sony 420-L Jumper Settings
8
Unit Sounds Distorted
8
Customer Thinks the Unit Is Broken
9
Fuses
9
ASR Case (Avoid Stripping Screws)
10
Figure 5 - Correct Tool for Removing Cables
10
High - Retention Force Connectors (Repair Technicians Label)
10
Mechanical Issues
10
Figure 6 - ASR Block Diagram
11
How the Asr Works
11
OEX-6Sr Connector on ASR Keyboard and ASR-88 Caution! Important
11
Communications Path
13
Keyboard and Rack Similarites
13
Figure 7 - Communications Path
14
Troubleshooting
15
Analog Board Regulator Voltages
16
Checking the Power Supply
16
Fuse Ratings
17
Power Supply Voltage Check Points
17
Testing the Power Supply Unloaded
18
Checking the Display
20
Display Self-Test Mode
20
Using Self-Test Mode to Diagnose the Keypad/Display Board
20
Troubleshooting an ASR-10 with no LEDS Lit 1
21
The ASR-10 Keyboard and the KPC Simulator Board
23
Asr-88 Keyboard
24
Key Response Problems
24
Pressure Response Problems
26
Error Messages
27
Figure 14 - ROM and Disk Compatibility
29
3 Headphone Check
39
Keyboard Test
39
4 MIDI Test
39
Asr Test Procedure
39
1 Power up and Load in Sounds
39
6 Disk Check
41
7 Sampling Check
41
8 OEX-6Sr Check
42
Section a - Replacing the Digital Board
45
Figure 1 7 - ASR-10 Digital Board
46
Section B - Replacing the Analog Board
46
Section C - Replacing the Power Supply Board
47
Section D - Replacing the Keypad/Display Board
48
Section E - Replacing the Keyboard (ASR-10)
49
Figure 21- ASR-88 Bracket Locations
50
Section E - Replacing the Keyboard (ASR-88)
50
Section F - Replacing the Digital Jack Board
51
Section G - Replacing the Analog Jack Board
51
Section H - Replacing the Disk Drive
52
Section I - Replacing the Transformer
52
Section J - Replacing the Line Filter
53
Figure 22 - SCSI Board Mounting
54
Section K - Installing and Removing the SCSI Board
54
Section L - Replacing the Digital I/O Option Board
55
Figure 23 - Installing a DI-10 Board into an ASR-10 Keyboard Unit
56
Section M - Replacing the O.S. Eproms
57
Section N - Replacing the Wheel Assembly
58
Figure 24 - ASR-1OR Exploded View
59
Replacing Asr Rack Modules
60
Section a - Replacing the Rack Digital Board
60
Section B - Replacing the Rack Analog Board
61
Section C - Replacing the Rack Power Supply Board
62
Section D - Replacing the Rack Keypad/Display Board
63
Section E - Replacing the Rack KPC Simulator Board
64
Section F - Replacing the Rack Digital Jack Board
64
Section G - Replacing the Rack Analog Jack Board
64
Section H - Replacing the Rack Disk Drive
65
Section I - Replacing the Rack Transformer
66
Section J - Replacing the Rack Line Filter
66
Section K - Replacing the Rack S C S I Board
67
Section L - Replacing the Rack Digital I./O Option Board
67
Figure 25 - Top Side of the ASR-10 Rack PCB Mounting Bracket
68
Figure 26 - Installing a DI-10 Board into an ASR-10 Rack Unit
68
Section M - Replacing the Rack O.S. Eproms
69
Section N - Replacing the Rack OEX-6Sr Board
69
Section 0 - Replacing the P C B Mounting Bracket
70
Figure 27 - SIMM Layout
71
Figure 28 - Board Differences
72
Figure 29 - SIMM Access on the New Rev Board
74
30 - These Are the Only Configurations that will Work Properly
75
Figure
75
Figure 33 SIMM Socket Components
76
Figure 34 - Removing Simms
77
Figure 36 - a Properly Installed SIMM
77
Digital I/O Information
80
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ENSONIQ ASR-10 Specifications
General
Brand
ENSONIQ
Model
ASR-10
Category
Recording Equipment
Language
English
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