Electro-Voice 7600 - Checking the Short Circuit Current; Ordering Replacement Parts; Factory Service; Technical Assistance

Operating and Servicing Instructions for the Electro-Voice 7600 Power Amplifier
pear on the distortion
waveform). Then, rotate
slightly clockwise just
until the visible clipping
disappears and the spikes
in the distortion waveform
reduce to their pre-clip
level.
8. Repeat Step 7 for the posi¬
tive current limit pot R24.
You may have to slightly
re-adjust R23.
9. If R23 and R24 are pro¬
perly adjusted, the chan¬
nel should clip symmet¬
rically (@ 1 % THD) at ap¬
proximately 1000 watts as
shown in Figure 11.
10. Repeat Steps 3 through 9
for Channel 2.
11. Turn off the generator’s
output signal. If you have
concluded with the test
and alignment procedures,
disconnect the amplifier
from its power source and
re-install the top cover
with the eleven screws
previously removed.
9.6 Checking the Short
Circuit Current
With one channel operat¬
ing at full rated power into an 8 O
load, carefully short the output
terminals using the 12 inch jump¬
er cable while monitoring the ac
line current. The ac line current
draw under a short circuit condi¬
tion should be less than 3 amps
(typically 1.5 to 2 amps). If it
exceeds 3 amps, you need to re¬
adjust R23 and R24 by rotating
them slightly counter-clockwise,
both by approximately the same
amount, until the ac line current
is under 3 amps. Repeat this pro¬
cedure for Channel 2.
9.7 Ordering Replacement
Parts
To order replacement
parts, look up the ordering
number from the component parts
listing and call (405) 324-5311,
FAX (405) 324-8981, or write:
Electro-Voice
Replacement Parts Sales
600 Cecil Street
Buchanan, MI 49107
U.S.A.
9.8 Factory Service
If factory service is
required, ship the unit in its
original packing prepaid to:
Electro-Voice Customer
Service/Repair
600 Cecil Street
Buchanan, MI 49107
U.S.A.
Tel: (616) 695-6831
FAX: (616) 695-1304
Electro-Voice Customer
Service/Repair
8324 Doe Avenue
Visalia, CA 93219 U.S.A.
Tel: (209) 651-7777
FAX: (209) 651-0164
Enclose a note describing the pro¬
blem in as much detail as possible.
Include any additional helpful in¬
formation such as test conditions,
where used, how used, etc.
9.9 Technical Assistance
For applications assistance
or other technical information,
contact the Technical Services
Manager. You can call (616) 695-
6831, TWX 810-270-31353, FAX
(616) 695-1304, or write:
Electro-Voice
Technical Services Manager
600 Cecil Street
Buchanan, MI 49107
U.S.A
Electro-Voice • a Mark TV Company
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