Adapter Circuitry

TM11-6130-381-14

resistors R6103 and R6104. This is applied to

applied to potentiometer R6154, differential

terminal 3 of amplifier A6101 through the filter,

comparator A6104 controls the operation of Q6109

which consists of resistor R6105 and capacitor

and relay K6103, and relay K6103 controls the

application of the battery B clipped sine wave

C6105. The positive terminal of battery A is

connected to potentiometer R6109 through pin 5 of

power supply to UJT multivibrator Q1607 of the

J6001. Resistors R6108, R6109, and R6110 form a

battery B charging current control circuit.

e. Input Frequency Compensating Circuit. A

voltage divider network that supplies a portion of

frequency detecting circuit, which controls the

the battery voltage to the wiper arm of poten-

operation of relay K6102, automatically adjusts the

tiometer R6109. This voltage is filtered by resistor

R6111 and capacitor C6131 and applied to terminal

time constants in the UJT emitter circuits of both

charging current control circuits for 60 Hz input

4 of amplifier A6101. Potentiometer R6109 is set

power frequency. The time constants of the UJT

so that the sensing circuitry will detect when the

circuits are preset for 400 Hz operation. The

battery is charged to 8.1 ±. 1 volts. When the

resistor-capacitor (rc) network, R6130 and C6117

voltage picked off by R6109 exceeds the reference

a n d transistor Q6102, f o r m s the frequency

voltage at R6104 (indicating that the battery

detecting circuit. When the input line frequency is

voltage has reached its fully charged state), the

400 Hz, the voltage output of the rc network is not

output of differential comparator A6101 (pin 7)

becomes positive, and causes transistor Q6101 to

great enough to exceed the threshold voltage of the

base-emitter circuit of Q6102 in series with diode

conduct. Capacitor C6133 and resistor R6106 filter

the voltage applied to transistor Q6101 to prevent

CR6117. Transistor Q6102 does not conduct. The

transient voltage from triggering Q6101. Capacitor

coil of relay K6102 is connected in the collector

C6101 filters transient voltages from Q6101 when

circuit of Q6102. When the input line frequency is

relay K6101 contacts are switched. The latching

60 Hz, the voltage output of the rc network ex-

coil of relay K6101 is connected in the collector

ceeds the threshold voltage and Q6102 conduts.

The detected current is amplified in the collector

circuit of Q6101 so that, when current flows in

Q6101, the latching coil is energized. When relay

circuit of Q6102 and energizes relay K6102.

K6101 is energized, the sine wave power supply to

Capacitor C6132 filters and smooths the current

UJT multivibrator Q6104 is interrupted (terminals

through the relay coil. When relay K6102 is

energized, relay K6102 contacts place capacitor --

3 and 5 of K6101 ). This prevents the multivibrator

circuit from producing an output to turn on gates

C6115 in parallel with C6114 (battery A control

of Q6001 and Q6002 in the battery charging

circuit) and capacitor C6122 in parallel with C6121

voltage circuit. This action removes the charging

(battery B control circuit). This added capacitance

voltage from battery A; when the gates are shut

adjusts t h e t i m e c o n s t a n t s i n t h e U J T

off, no rectification for battery charging takes

multivibrator emitter circuits for 60 Hz operation.

f. Output Filtering Circuit. Electromagnetic

place. A second set of contacts of relay K6101

controls the operation of the battery A CHARGE

interference filters are provided at the channel A

and channel B output connectors J6001 and J6002,

ON and OFF indicator lights, When relay K6101

is energized, the ac voltage at terminal 6 of relay

respectively. Filters FL6003, FL6004, FL6007, and

K6101 is disconnected from the CHARGE ON

FL6008 filter the channel A change and sense

indicator light and applied to the CHARGE OFF

circuits while filters FL6005, FL6006, FL6009, and

FL6010 similarly filter the channel B circuits.

indicator light. RESET (A) switch S6003 controls

the resetting of relay K6101 once it is energized by

4-3 Adapter Circuitry

the sensing of a fully charged battery. When the

a. Mounted in the cover of the battery charger

RESET (A) switch is momentarily held in its down

case is a 230 vac conversion assembly which is

position, the reset coil of relay K6101 is energized,

basically an adapter. This assembly provides a

the relay K6101 is reset so that the clipped sine

female mating connector J6301 for the three-prong

wave power supply is again connected to the UJT

male power plug P6001 and is wired to binding

multivibrator circuit. This condition brings the

posts E6301, E6302, and E6303 (fig. 4-5 and

battery charging currrent control circuit back into

FO-1). The adapter provides connection of the

operation. At the same time, the CHARGE OFF

battery charger to any source of 115- or 230-voIt ac

indicator light extinguishes, and the CHARGE

power requiring binding post connections.

ON indicator light illuminates. Operation of the

b. The 230 vac conversion assembly serves as

charging voltage-sensing and cutoff circuit for

the power cable storage spool and power plug

battery B is the same as for battery A. The

storage receptacle whenever the battery charger is

battery B current has its own power supply circuit,

not in use.

which consists of CR6120 through CR6123 and

associated circuitry. The battery B voltage is

4-6