Ensoniq asr service manual
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Extracted text from ensoniq asr service manual (Ocr-read)
Page 2
Table of Contents
TABLE OF CONTENTS
IMPORTANT THINGS TO KNOW
Known Areas of Concern .........................................
Avoid Damage from ESD (Electrostatic Discharge) ..... l
SIlVflVIS ...................................... 1
What SW5 to Use .............................................................................................................
What Changed? ............................................
How to Tell Which Rev Board You Have
THE DISK DRIVE
Transporting a unit... .
What disks to use .................................................................................................................. 3
Testing the Disk Drive .................... 3
UNIT SOUNDS DISTORTED... 4
FUSES .............................................................................. 5
The 20-pin Keyboard/KPC Simulator Ribbon Cable 5
Customer Thinks the Unit is Broken , 5
MECHANICAL ISSUES .................................... 6
ASR Case (Avoid Stripping Screws). 6
High - retention Force Connectors (Repair Technicians Label) ........................................... 6
OEX-6sr Connector on ASR Keyboard and ASR-88 Caution! Important!
HOW THE ASR WORKS. ........
Keyboard and Rack Similarities
Communications Path ...................................................
TROUBLESHOOTING
CHECKING THE POWER SUPPLY .............................................................................. 12
Analog Board Regulator Voltages ....................................
POWER SUPPLY VOLTAGE CHECK POINTS
Fuse Ratings .............................................................
TESTING THE POWER SUPPLY UNLOADED
CHECKJNG THE DISPLAY .....................................
DISPLAY SELF-TEST MODE ......................................................................................... 16
Using Self-Test Mode to Diagnose the Keypad/Display Board ............................................ 16
Troubleshooting an ASR-10 With No LEDS Lit .................................................................. 17
Troubleshooting anASR-lO With All LEDS Lit, No Display
KEYBOARD AND FOOTSWITCH INPUTS ..............................
The ASR-10 Keyboard and the KPC Simulator Board.
ASR-10 Footswitch and Patch Select Inputs ..........................
ASR-88 KEYBOARD ................ 20
Key Response Problems ..... ..
Pressure Response Problems ................................................................................................. 22
ERROR MESSAGES .................................
ASR-10/88 SOFTWARE NOTES...
ASR TEST PROCEDURE ................................................................................................. 35
1. Power Up and Load in Sounds ..................... H
2. Keyboard Test (ASR-10/88 Keyboard Only) ................................................................... 35
ASR Service Manual