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TroubleshootingTechnical specifications
651A
Power output 75 watts (into 8Ω)
THD (unweighted) <0.002% @ 1kHz, 80% of rated power
<0.03% 20Hz - 20kHz, 80% of rated
power
<0.02% 20Hz - 20kHz @ 10W
Frequency response (-1dB) 5Hz - 50kHz
S/N ratio (ref 1W) >92dB (unweighted)
Input impedances 47kohms
Power Amp damping factor >100
Max. power consumption 600W
Standby power consumption <1W @ rated mains
Bass/Treble controls Shelving, ultimate boost/cut
+/- 7.5dB @ 20Hz and 20kHz
USB input USB Audio 1.0
16 bit 32kHz, 44.1kHz, 48kHz.
Dimensions (H x W x D) 120 x 430 x 350mm
(4.7 x 16.9 x 13.8”)
Weight 8.4kg (18.5lbs)
There is no power
Ensure the AC power cord is connected securely.
Ensure the plug is fully inserted into the wall socket and is switched on.
Check the unit is switched on at the rear panel.
Check fuse in the mains plug or adaptor.
There is no sound
Make sure the unit is not in Standby mode.
Check that the source component is properly connected.
Check that your speakers are properly connected.
Check that the correct speaker outputs are switched on (‘Speaker A/B’
button on the remote control).
If source LED is flashing, turn ‘Mute’ off.
There is no sound on one channel
Ensure that balance control is in the correct position.
Check speaker connections.
Check interconnects.
There is a loud buzz or hum
Check turntable or tone arm for ground and connection lead fault.
Ensure no interconnects are loose or defective.
Ensure that your tape deck or turntable is not too close to the amplifier.
Unable to make tape recordings
Check that ‘Rec Out’ has been connected correctly.
There is weak bass or diffused stereo imaging
Ensure that speakers are not wired out of phase.
The sound is distorted
Check that the volume or tone controls are not set too high.
Protection LED flashing
See section on CAP5 protection system.
The remote handset will not function
Check that the batteries have not expired.
Ensure that nothing is blocking the remote sensor.
In the event that the above solutions do not remedy your problem, please
consult our frequently asked questions (FAQ) section on our website:
www.cambridge-audio.com/sts/faqs
For all servicing, in or out of warranty, please contact your dealer.
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