ENSONIQ ASR-10 Wartungshandbuch PDF herunterladen (Seite 15)

Important

between the two connectors are defective. If you have an ASR that has a problem communicating with its

keypad/display board, you may want to verify continuity between the connectors on the digital board.

Turn off the power and unplug the 20-pin ribbon cable from the ASR digital board at J7 and the ASR 24-pin

display cable from the digital board at Jl. Using an ohmmeter, verify continuity between the following points

on the digital board:

(20~Din

connector)

J 1

(24-Din

connector)

Pin 1

Pin 9

Pin3 to Pin 10

Pin 5

Pin 11

TROUBLESHOOTING

Often the faulty module in an ASR can be determined through normal use. Sometimes, it is difficult to

isolate the problem. The following flowcharts can help you diagnose units that appear dead (no display).

When troubleshooting an ASR, always disconnect any expansion devices that may be present (such as the

SCSI Interface or OEX-6sr Output Expander). This will prevent a faulty expander from complicating your

troubleshooting. Remember, when you take out the SCSI board, connect the analog board to the digital

board via a 34 pin ribbon cable to J6 on the digital board and

on the analog board.

The following pages include troubleshooting information:

Pao,e

Problem

AC Line Voltages

Power Supply Voltage Check Points

ASR with Incorrect Analog Power Supply Voltages (flow chart)

ASR with Incorrect Digital Power Supply Voltages (flow chart)

Display Self-test Chart

ASR with No LEDs Lit (flow chart)

ASR with All LEDs Lit, No Display (flow chart)

ASR Foot Switch and Patch Select Inputs

ASR-88 Keyboard

ASR Service Manual

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ENSONIQ ASR-10 Wartungshandbuch Seite 15