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ATI Technologies M100 Manual de operação e manutenção

NOTE

Output transformers blocking RF and interrupting ground loops MUST be properly

loaded in order to provide flat response and minimum overshoot. Always be sure that the

output sees a 600 ohm load across pins 2 and 3. An occasional double load (300 ohms) is

better than no load.

REMOTE GAIN TRIM CONTROL

A 10 Kohm linear potentiometer can be connected across a single conductor shielded

cable with a standard RCA type phono plug at the M100 end. Connect the arm and one

end of the pot together and to the shield, connect the other end of the pot to the center

conductor. Decreasing resistance will cause decreasing gain to a limit of approximately -

15 dB change. If you use a pot of lower value than 10 K, you will be unable to achieve

full gain at maximum resistance. The maximum length you can run the remote gain

control cable is somewhere between three feet and mile.

MAINTENANCE

There is no routine maintenance required by your ULTIMIKE amplifier. If you have a

problem while using the M100, eliminate by substituting the microphone, cables,

connectors, load, and AC power and switch positions as possible causes before attacking

the M100.

DISASSEMBLY

1. Remove AC power.

2. Remove nine Philips head screws.

3. Pull off switch protector bracket.

4. Unlock both XLR connector PC board mounted center inserts from their cover

mounted outer shells using an .090 wide screwdriver placed into an access hole

located above the three terminals in each insert. Give each 1/8 turn CCW to

unlock; slot is horizontal when locked. DO NOT FORCE.

5. With your thumbs on the connector inserts and your fingertips on the sides of the

cover, gently slide the cover forward until the connector shells clear the inserts.

Lift the cover clear and pull the line cord grommet clear of the cover.

6. Reassembly is the reverse of the above. Don't forget the grommet.

ADJUSTMENTS

Avoid the temptation to diddle the internal trimpots R27 and R40 just to see what affects

they cause. Both are sharp null type settings, which are greatly degraded by even slight

misadjustment. Replacement of any semiconductor in the unit should not require pot

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