IN CASE OF TROUBLE
SYMPTOM PROBABLE CAUSE & CURE
No sound from one or both speakers
A) Check for blown or missing. fuses in speakers & at (3)
of model 777.
B) insure that all cable connections are correct & secure to
(2), (5), (6), of 777 & (12), (13), (15), (16), (17) of 776.
C) insure that 776 batteries are fully charged. Refer to
operating instructions.
Low volume sound from one or both
speakers.
Check for blown fuses at (4) of model 777. These
protection fuses are wired in the feedback loop - if the
fuse blows some sound will be audible.
Hum or crackling from one or both
speakers. This is usually caused by a faulty
ground connection of a shielded
interconnecting cable.
A) Insure that there are no faulty interconnect cables.
problem
B) Insure that all interconnect cable plugs are secure
(PUSHED IN) to (12), (13), (15), (16), (17), of 776 & (6) of
777.
C) Attach all available chassis grounding wires from
turntable, tuner, tape deck, etc. to (18) of 776. Use banana
plug supplied.
D) Long cable runs including speaker wire can act as
antennas causing R.F.I. problems. if the above remedies do
not work then ferrite rings must be installed on the
offending cable. These rings will remove the R.F.I. without
affecting sound re production. Contact your audio dealer
or the factory for further information.
Radio frequency pick-up audible from one
or both speakers.
The Mission 776/777 amplifiers have been designed to
reject most R.F. interference. However, R.F.I. can be a
problem depending on where you live & the quality of
associated equipment used with the 776 or 777 amplifiers.
Music reproduction sounds hollow, certain
instruments lack definition.
Speaker POSITIVE & NEGATIVE terminals are reversed
causing frequency cancellation. Insure that the speakers
are connected properly: red (+) terminal of 777 LEFT
channel goes to red (+) terminal of LEFT speaker & black
(-) terminal of 777 LEFT channel goes to black (-) terminal
of LEFT speaker. Repeat for the RIGHT channel.
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