SERVICE DATA CHART
The following service data chart indicates various troubles by their symptoms and gives the specific remedy
necessary.
Indication
Cause
Remedy
Defective Radiotrons
Poor antenna system
Run-down batteries
Line-up condensers put of adjustment
Defective parts in receiver
Defective loudspeaker
Test and replace any defective Radiotrons
Install antenna as suggested in Part I
Check voltage of all batteries including any
eliminator if used. Unless the voltages are within
the limits given in Part III, Section 2, batteries
should be replaced. If it is the storage battery it
should be charged until gassing lasts for 1 hour.
If a trickle charger is being used possibly the rate
is not sufficiently high for the service the
receiver is giving. The remedy is to increase the
charging rate
Adjust line-up condensers as described in R-44 and
46 Service Notes
Check by means of continuity test and make any
replacement necessary
Check by using- another loudspeaker known to be
in good operating condition and make any
replacement necessary
Defective Radiotrons
Defective interstage A.F. transformer, output
choke, output condenser or other parts
Receiver oscillation
Test and replace any defective Radiotron
Check parts by means of continuity test and make
any replacement necessary
Should the Radiolas oscillate, all signals will be
weak, distorted and accompanied by a whistle.
See section on "Oscillation" for remedies
8
No Reproduction
Defective Radiotrons
Defective Operating Switch
Defective Volume Control
Wrong battery connections
Run-down batteries
Defective local-distant switch
Defective parts in receiver
Defective loudspeaker
Replace defective Radiotrons
Replace defective operating switch
Replace defective volume control
Connect battery correctly. Complete instructions are
given in R-21 or
22
Instruction Book
Replace "B" and "C" batteries if low. Charge
storage battery if necessary.
Replace defective local-distant switch.
Check by means of continuity tests and make any
replacement necessary
Repair any defect in loudspeaker
Low Volume
Distorted
Reproduction
