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M250

Amplifier                            Instructions for Use  Page 3 of 8

Issue 4:  May 2002

GENERAL ADVICE

INSTALLATION  PRECAUTIONS  and  USER  INFORMATION

Your new M250 power amplifier is designed and built to provide trouble-free performance, but
as with all electronic devices it is necessary to observe a few precautions:

Heed all warnings shown on the back of the product.

Only connect the M250 amplifier to a mains outlet having the same voltage as marked at the
back of the unit.

Always ensure that when disconnecting and reconnecting your audio equipment the mains
supply is switched off.

Position the mains lead and signal interconnects where they are not likely to be walked on or
trapped by items placed on them.

Do not use near water, or place water-filled containers on the amplifier, for example, flower
vases or potted plants.  

If water does spill into the player, immediately pull out the mains plug

from the wall socket and inform your dealer, who should then check the unit before further
use.  Entry of liquid into the amplifier is dangerous, and may cause electric shock or fire
hazard.

Do not place the unit near heat sources such as radiators, direct sunlight or other equipment.
The case of this amplifier can run at high temperatures - operate the unit in a well ventilated
area, and do not touch the side heatsink fins after periods of use at high output power.

Do not remove covers or try to gain access to the inside.  There are no internal user adjust-
ments.  Refer all service work to an authorised Musical Fidelity agent.

NOTE: Unauthorised opening of the equipment will invalidate any warranty claims.

There are fuses inside the M250 Amplifier.  In the unlikely event that one blows, refer the unit to
your audio dealer.  Do NOT try to replace the fuse yourself as this will invalidate the warranty.

Dust regularly with a soft duster or soft brush, but be careful when using cleaning or polishing
agents - they may harm the surface finish.

The electronics in modern hi-fi equipment is complex and may, therefore, be adversely affected
or damaged by lightning.  For protection of your audio system during electrical storms, remove
the mains plugs and disconnect any aerial lead.

If after-sales service is required, to help your dealer identify the M250 please quote the serial
number located on the rear panel of the unit.

RADIO  FREQUENCY  INTERFERENCE  (R.F.I)

This product has been tested to ensure that its operation is not adversely affected by normal
background levels of R.F.I., and that it does not itself generate excessive amounts of interfer-
ence.  However, if a problem persists, please contact your Musical Fidelity agent.

Содержание M250

Страница 1: ...cal Fidelity M250 monobloc power amplifier Used properly and carefully it should give you many years of outstanding musical reproduction Dust regularly with a soft duster or soft brush but be careful when using cleaning or polishing agents they may harm the surface finish If you have any questions about your audio system please consult your dealer who is there to help and advise ...

Страница 2: ... which is marked with the letter E or coloured green or green and yellow or by the earth symbol The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black If connecting to a BS1363 plug a 13 amp fuse must be used WARNING The...

Страница 3: ... at high temperatures operate the unit in a well ventilated area and do not touch the side heatsink fins after periods of use at high output power Do not remove covers or try to gain access to the inside There are no internal user adjust ments Refer all service work to an authorised Musical Fidelity agent NOTE Unauthorised opening of the equipment will invalidate any warranty claims There are fuse...

Страница 4: ...Y CI RCUM STAN CES N O USER SERVI CEABLE CO M PO NEN TS I NSI DE REFER SERVI CI NG TO Q UALI FI ED EN G I N EER LINE INPUT LOOP OUTPUT O N O FF TRIGGER IN TRIGGER OUT 3 4 5 6 Front panel layout 1 OPERATE indicator LED blue 2 Power status button see page 6 3 POWER on indicator LED orange Back panel layout 3 Speaker output see page 5 4 Speaker output see page 5 5 Power switch 6 IEC type mains inlet ...

Страница 5: ...olume control on your preampli fier to minimum and switch on its power All input output and power connections should be made with the mains power switched OFF INPUT CONNECTIONS As the M250 is a mono power amplifier two are required for stereo operation and further units can be used for multi channel surround systems or bi amplification etc The M250 can be used with a preamplifier or any audio line...

Страница 6: ...o input signal present when mains power is applied to the M250 it will turn on immediately with the OPERATE LED lit Trigger Mode The M250 responds to a trigger on con trol voltage of between 5 and 12 volts posi tive or negative received via the 3 5mm TRIGGER IN socket on the rear panel The first trigger pulse received after apply ing mains power will turn the amplifier on and cancel the audio sens...

Страница 7: ... the case of the M250 power amplifier yourself as this will invalidate the guarantee Problem Possible Cause Remedy No power when MAINS Mains plug not inserted Plug in securely POWER switch is operated fully into rear socket No sound Tape monitor function has Switch off tape monitor been selected on the pre at the pre amplifier amplifier Wrong connections between Check audio input lead pre amplifie...

Страница 8: ...31K Ohm Input sensitivity for full power output into 8 Ohms 1 42 Volts Signal noise ratio reference full power output 115dB A weighted Input 1 RCA connector Outputs 1 amplifier channel via 2 pairs of speaker binding posts 1 RCA loop output socket Power requirements 100 115 230V AC 50 60Hz factory preset 1000 Watts maximum into 8 Ohms load 70 Watts idle Dimensions 192 mm 7 6 inches wide 125 mm 4 9 ...

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