Crown OC-150A - OC-150 Calibration and Testing

QC-150 TEST
1, Input affset an panel meters,
t
1
- Apply power Co unit, with n0 input meters should read zero
d
Calibration
- ApplZy 1263 VAC to hp #1 in~xui. (both charnels)
{Use true rms peak equivalent AC meter witk variac ta obtain 120 VAC
calibrating source.) Set range switch to 140 V, meter switch to "VU";
adjust R17 for 120V reading on panel mewrs.
Set meter switch to "'P and turn '%old-time" ccantrals ts full CW,
Remove sLenal from fnput (#2 above).
Meter reading should hold at-
120 V
for 10 - 15 seconds,
Switch range switch to 14 V, turn "hold-time'% controls ta full CCW and feed
in a 10 Volt signal to Amp 111 input.
(Use the output
from an amplifier
to obtain a I0 V signal)
Meters should read 2 10 V,
Switch range awfteh to L4 V, feed iw a 1 volt siwal,
X~ters should
read 2 L V,
Feed in a 7.8 V
1KHz signal to Amp if2 input. Take output from stereo
headphone jacks and feed to an external AC rm.
Switch headphone attenuator
switch tu ''max", VoT&mneter ~IaouLd read 7,8 V. (Odb og.1 +I0 W scale)
Switch to middle position*
Voltmeter should read 2 1,2 V
$-17db).
Switch to 'hin'"po%itis.stm addtmetea should read%. 62 V I-22db).