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STAR*TECH JOURNAL
July
1997
BOCRilLH
llanufacturlng
Corporation
Ed Glapinski, Quality Control Manager, Rock-Ola Mfg Corp., Torrance, California
TROUBLESHOOTING THE SveERSoNtc COMPUTER
AND KEveoARo/D1sPLAV
Our service center has had several
inquiries about how to determine if
the SyberSonic Computer or key-
board/display is bad in the event that
the display does not show data.
[TROUBLESHOOTING TtP]
MODEL
All Rock-Ola Jukeboxes with
SyberSonic Electronics
her, the amplifier is hot even with
logic power off.)
4. Reapply power by returning
the power cut off switch to it's
middle position. This sends a
command via the RS-485 port
from the computer to mute the
amplifier. The amplifier menu
LED's should tum off and the
mechanism will "home" itself.
POWER CUI OFF SWITCH
SYMPTOM
Keyboard/Display has power but
is inoperative. (Keyboard Power
Led is on.) Mechanism goes
through power up process and
"finds" home.
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WARNING
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PROBLEM
How to tell if keyboard or com-
puter is bad.
Statuallevel LED
-a-~_... ..
+12 .......
.... -+-1...---1
1
Feature
LED
5. Activate the amplifier menu
again.
6. Press and release the power cut
off switch. This will cause the
machine's power to reset which
will "home" the mechanism and
should also extinguish the ampli-
fier menu LED's
* If the amplifier menu LED's
tum off, the computer is good
and the keyboard or keyboard
cable should be changed.
* If the menu LED's stay on, the
communication port is defective
and the computer needs to be
replaced.
THEORY
Any time power is reset, a mute
signal is sent to the amplifier.
Any time the amp receives a
mute signal, the menu LED's will
turn off .
nication is working correctly and
that the problem must lie in the
external RS-485 communication.
The keyboard and amplifier
communicate via the same data