Bose 1600-VI Specifications download pdf (Page 19)

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6.0 Troubleshooting

Problems/solutions

If you are having trouble or suspect a problem with the Bose

Model 1800-VI or 1600-VI

Professional Stereo Power Amplifier, try some simple troubleshooting before contacting an

authorized Bose Service Center.

(Usually an indication of a

power supply problem,

either in the power line

itself or the amplifier’s

power supply.)

(Usually signal-source,

bad cable or partial

output short circuit

related.)

Problem What to do

No sound, no power • Amplifier power off. Turn on.

• Linecord disconnected.

• Poor fit between the plug and AC receptacle. Try another receptacle.

• Power off at AC receptacle. Check with tester or lamp.

• Blown amplifier fuse. Replace fuse.

• Open thermal breaker in the power transformer. Allow amplifier to

cool and the breaker will reset itself.

Power on, low output • Input level controls set too low. Reset.

or no output • Check to see if problem is at the source. Move the input

connections to another amplifier you know is working.

• Be sure that there are no small strands of wire touching similar

strands coming from the other wire in the cable.

• Make sure the speakers are functioning correctly.

• If you are using bridged-mono mode, make sure the stereo/mono

switch is set correctly.

• Use a voltmeter to determine if the power line voltage is dropping

excessively when the amplifier is driven hard.

Playback mixed • Check or replace the connecting cables.

with hum • Make sure that each screw terminal connection is tight.

• Signal cables may have been routed too closely to AC cables,

power transformers, motors or other EMI inducing device.

• Connect another source to the power amplifier inputs. If the hum

stops, the problem lies with the original source component.

Distortion • Check input level controls. If set too low, the preceding piece of

equipment may not have sufficient output to overcome the loss.

• Check speaker connections and verify that all screw connections

are tight and that there are no stray strands of wire to cause

short circuits.

• Verify that the total load impedance presented to the amplifier

is within the limits described in this manual for the mode of

operation selected.

Unnatural sound • Check the EQ cards. Verify that the EQ card corresponds to the

model speaker being used and that the EQ card is installed in the

proper channel. Verify that the speakers are connected to the

same channel that the corresponding EQ card is installed in.

Care • Wipe the front panel and chassis with a soft, dry cloth.

• For stubborn spots, use a mild dish soap or detergent sparingly

applied to a soft cloth.

• Don’t use alcohol, ammonia, or other strong solvents.

(Usually caused by

excessive loss in the input

controls when the mixer/

equalizer/crossover does

not produce enough

output. Also caused by

over-driving that results in

output clipping, or current

limiting caused by

excessively low load

impedances.)

(Some parts of the

frequency band do not

sound balanced with the

rest of the band.)

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Bose 1600-VI Specifications Page 19

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