NOTE: TAG AND DISCONNECT ELECTRICAL LEADS AS NECESSARY.
NOTE: REMOVE WASHER AND PREFORMED PACKING FROM HEADER AFTER REMOVAL OF BUSHING.
Table 5-1. Modules Point-to-Point Test- Continued
At Input Error Amplifier Module (White)
AC signal going to receiver coil.
AC signal connects input amplifier.
Output of X control DC voltage (variable-1.25 to 0
volts depending on position of X control.
11 & 12
Output of input amplifier and is AC and DC
Output ofinput amplifier,two voltages AC and DC-
DC voltage, same as that at pin no. 3
Input to the A1 amplifier AC signal.
A3 Output Amplifier Module (Yellow with Black Stripe)
R Control feedback voltage AC signal.
DC end AC voltages.
-6.3 Volts regulated DC.
AC Feed back loop. It determines gain of output
10 Volts unregulated DC or whatever battery
Input voltage from battery.
Output to output amplifier. The signel will be lower
Output to earphone AC signal.
than that at pins 1 and 2 AC signal.
Regulated 6.2 volts DC.
Unregulated 10 volts DC same as battery voltage
safety diode which preventa damage in case
Pins 1 and 2 have an AC and DC voltage. DC
batteries are installed improperly.
voltage should be equal to that of DC voltage at
DC output to X control -1.26 volts approximately.
pin 3. Pin 5 and 10 is where phase detecting is
Regulatad -6.3 volts DC.
At Variometer Module (Black)
10 volts unregulated DC actual 9.6 (You have a loss
because voltage has passed thru the protective
Approximately AC ground (.25 OHMS) one side of
2 & 10
One of the outputs from oscillator (in phase) 250 to
90 degrees Out of phase signal used for phase
Output (90 degrees out of phase) AC signal 126 to
6.2 volts DC regulated.
175 millivolts (voltages taken at a null
One side of phase adjusting resistor in variometer.
Other side of phase adjusting resistor in variometer
end return path to ground.