Remedying Problems With The Amplifier - Porsche 996 TT Repair Manual

Remedying problems with the amplifier

Work instruction
1 Check amplifier connections
for damage and then connect a
functional amplifier.
Interference noises still
present?
2 Are the interference noises still
present?
3 Are the interference noises still
present?
4 Repair cable connections. Are
the interference noises still
present?
5
7. Localise the battery
connection (+) of the
Remedying problems with the amplifier
einordnung
Yes
Replace amplifier
' End
Replace loudspeaker
' End
1. Check the audio cables between the
radio and the amplifier for free
points, short circuits and high
resistance.
2. Check all cable connections for bent
or loose connections, corrosion or
other damage.
' Step 4
3. Localise the ground connection for
the amplifier.
4. Disconnect the ground lead on the
amplifier side.
5. Re−connect the ground connection
at an appropriate point.
6. Measure the functionality of the
ground connection with a
multimeter beween the negative
terminal of the battery and the
relevant ground point (potential
difference).
' Step 5
' End
No
If the interference
noises only come from
one loudspeaker, insert
a functional loudspeaker
' Step 2
Lay the cable supply
lines again, making sure
that there is adequate
clearance to other
cables and electrical
components; if
necessary, reconnect the
loudspeaker connection.
Also, twist the
loudspeaker leads
together to minimise the
interference noises
' Step 3
' End
No: ' End
=> Interference noises
1723