0
a. Equipment setup is shown in Fig. 6-4.
3. Adjust High Voltage Power Supply
b. Turn the POWER switch to ON position, then connect
a. Test equipment setup is given in step 2.
a calibrated voltmeter between pin K on the Vertical Ampli-
b. Turn the POWER switch to OFF position. Remove the
fier ond Blanking circuit board, and chassis ground (see Fig.
CRT base socket, then remove the plastic CRT base socket
6-5).
cover. Replace the base socket on the CRT.
c. If the voltage is not within tolerance, adjust the -10
Volts adjustment R968, for a meter reading of -10 volts.
2. Check +10 Volt and + 150 Volt Power
Supplies
NOTE
The high voltage supply must be operating before
the + 150 volt supply will regulate. If the high
voltage supply is not operating, a substitution
may be made by connecting a 30 volt battery
between the + 150 volt supply and the high volt-
age 175 V supply as follows:
Connect the + lead of the battery to pin AQ
on the power supply board. Connect the - lead
of the battery to pin Al.
a. Equipment setup is given in step 1.
b. Connect the voltmeter between pin L of the Vertical
Amplifier and Blanking circuit board and chassis ground
[see Fig. 6-5). Check the +10 volt supply. Must read
between +9.7 and +10.3 volts (10 V 3%).
c. Connect the voltmeter between pin M, of the Vertical
Amplifier and Blanking circuit board, and ground. Check
the +150 volt supply. Must read between +145.5 and
+154.4 volts (+150V 3%).
