in the STANDBY position voltage is applied to all
2-19. Control Panel
circuits except the chart drive motor and the pen-
lifter solenoid; in the POWER ON position, volt-
a. The control panel, in addition to the measur-
age is applied to all circuits.
ing circuit, contains control circuits for the appli-
cation and checking of primary power to the
c. Neon indicator lamp 1201 indicates when
power supply chassis, and the speaker used for
switch S201 is in either STANDBY or POWER
monitoring the input signal.
ON position. Meter M201 is a synchronous reed-
type panel mounted frequency meter indicating
b. Overload circuit breakers magnetic type,
the powerline frequency from 48 to 62 cycles
K201 and K202, rated at 4 amperes, are provided
when switch S201 is operated in either position.
in series with each of the primary 110-volt ac
leads. Application of power is controlled by a
Meter M202 is an iron vane-type panel mounted
ac voltmeter with a range of 0 to 150 volts to
f o u r - p o l e , double-throw switch S201. In the
POWER OFF position no voltage is applied, and
indicate line voltage.