GAI-Tronics PA250-001 Handmatig - Pagina 9
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Model PA250-001 250 Watt Central Amplifier
Some examples of resultant 8-ohm speaker combinations are as follows:
•
two 16-ohm speakers connected in parallel;
•
two 4-ohm speakers connected in series;
•
four 8-ohm speakers; two speakers connected in series, then each group of two connected in parallel.
25 V/70.7 V Line Output
For 25-volt output, connect the speaker line to the terminal strip connections marked C (-) and 25 V (+).
For 70.7-volt output, connect the speaker line to the terminal strip connections marked C (-) and
70.7 V (+).
Note: When using the 25-volt or 70.7-volt line outputs, set the amplifier's 25/70.7V L
switch to IN position.
Speaker Line
Output Voltage
Operation
This section describes the operation of the Model PA250-001 Amplifier.
1. Turn the front panel's master VOLUME control CCW for the initial system startup. Turn the front
panel ac power switch to ON.
2. Apply the proper audio signal level to the desired input connection.
3. Adjust the master VOLUME control to the desired speaker audio output level.
Note: The 600-ohm/Tel-Page's rear-mounted recessed gain control may require adjustment depending on
its initial setting, as applicable.
Maintenance
WARNING
Servicing should be performed by qualified service personnel only. Failure to follow instructions could
result in damage to equipment and/or injury to personnel.
The Model PA250-001 Amplifier contains two DCV bus fuses on each Output Power Amp PCBA, as
shown on Figure 2. Insure that replacement fuses are only UL-listed, 5A, 250V, Fast Blow, 0.25 x 1.25
inch.
CAUTION
1. Disconnect the ac power cord.
2. Remove the top cover screws.
f:\standard ioms - current release\42004 instr. manuals\42004-340e.doc
06/02
Corresponding Load Impedance
(ohm) for 250 W (Full Output)
25 V
70.7 V
Pub. 42004-340E
INE
2.5 ohm
20 ohm
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