POSITION RANGE ADJ. R5870
mid-range
LR5804
slug above winding
LR5812
slug above winding
HP PEAKING
mid-scale
Plug R unit into the oscilloscope through flexible plug-in extension and
quickly check the transistorized supplies. (Typical readings)
Check points
Knobs at preset location
unless otherwise speoified
Collector of V6837
to ground
COLLECTOR SOURCE VOLTS
full left (ccw)
full right (ow)
-22 v
-8.8 v
Floating chassis to
collector of V6857
PULSE VOLTS VARIABLE
full left (ocw)
full right (cw)
-4.2 v
-10.8 v
Floating chassis to
collector of V6877
-10.4 v
1.
CHECK DC OUTPUT LEVEL
Measure between, pin 1 and ground, then between pin 3 and ground of the
16-pin amphenol plug (65-70 v).
2.
CHECK MICROPHONICS
Rap lightly with the palm of the hand on top of the plug-in to check
microphonics.
3.
ADJUST POSITION RANGE ADJ. (R5807)
With the front panel POSITION control centered, adjust R5807 to
position the trace on the "Vertical-System Electrical Center".
4.
SET GAIN ADJUST (R5885)
Connect
200
mv of CALIBRATOR signal to SCOPE INPUT. Depress PUSH TO
CONNECT SCOPE INPUT TO THIS TERMINAL and adjust R5885 for
2
cm of
vertical deflection.
5.
CHECK COLLECTOR SOURCE VOLTS FOR TRACKING
Connect voltmeter from C_ to ground and check COLLECTOR SOURCE VOLTS
control for tracking with front panel indication from 1_ to 1£ volts
on both -PNP and +NPN.
6.
SET PULSE VOLTS ADJ.
(R6859)
Connect vertically-calibrated test scope to JB and observe amplitude
of pulses generated by the mercury pulser. Adjust R6859 for 10 volts
of signal output. Notes BIAS VOLTS must be set for 0 volts across
C5802 to insure accuracy of this adjustment.
R-3
January, 195>9
