Audioaccess PX-603, Preliminary Service Manual

Page: 39 / 68

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[TITLE]
MARCH 9, 2000
[PART NUMBER]
Audioaccess Trouble Shooting Page 9
PX-612 RELATED
Problem Encountered Find the problem component solution
PX-612 LED indicator
light always stays RED.
Amp is in protect mode. Check AC line voltage.
Check that speakers are not shorted
and that the impedance is correct.
Check for DC offset for sources or
Preamp.
Check for overheating. Requires 110VAC constant.
No lower than 4 Ohms per channel.
Change or repair source.
Change or repair Preamp.
Ventilate cabinet.
PX-612 LED indicator
light always stays Yellow.
IE: unit does not come out
of stand-by. Check input signal from Preamp.
Check continuity of cabling feeding
amp. Feed a direct signal to Amplifier such as
from a CD player to see if it turns on
and off with signal sensing.
Change or repair defective cable.
PX-612 LED indicator
light always stays Green.
IE: Amp is always ON Is there a cable system attached to
the Audioaccess controller?
Is there a local system sharing
sources with the system? Some
receivers short the input to ground
when in the stand-by condition. Disconnect cable. If the problem goes
away then use a ground loop isolator in
line with the cable input feed.
Disconnect wiring feeding the local
system. If problem goes away use an in
line (RCA style) ground loop isolator to
bring the signal to the local system.
MULTI SYSTEM RELATED
Problem Encountered Find the problem component solution
Subsequent units in multi
system (other than
system 1) always jump
back to FM after another
source key has been
pressed. PX-connect or MRX-connect
sequence was not performed
correctly. After running the connect sequence be
sure to press the “ALL OFF” button on
front panels from the highest system
number to the lowest system number.
Subsequent units in multi
system do not respond to
any commands other than
front panel. Check Data bus connection.
Check keypad connections.
Check bus fuse on back panel.
Voltage between pins 1 & 4 should
be between 8 to 13 VDC.
Connect with correct polarity while not
connecting the RED (or power) wire
between systems.
Make sure keypads are correctly
connected for polarity.
Change fuse w/ 1.5 amp slo-blo