This section contains information required by maintenance personnel
to understand the equipment and trouble shooting data to quickly and
efficiently locate the cause of an equipment malfunction or performance
deterioration. Information in this section includes: equipment block theory,
detail theory, and a trouble shooting table. Part location illustrations
Before attempting to test or service the recorder-reproducer, maint-
enance personnel should be thoroughly familiar with the basic principles
of the operating controls. Repair procedures are contained in section 5.
TROUBLE SHOOTING DATA.
Trouble shooting data for this equipment is contained in table 4-1.
this data enables the technician to quickly isolate a fault to a circuit
or component part. Transistor and terminal voltages are provided on the
schematic diagram to aid in trouble shooting.
REMOVAL OF CHASSIS
To gain access to all parts, the chassis must be removed from the case.
Remove the chassis from the case as follows:
a. Disengage two luggage catches, raise hinged top cover to the
90-degree position, and slide top cover toward the rear to separate the
b. Remove five screws, flat washers, and lock washers from the top
c. Invert the recorder on a felt or rubber pad and remove the four
rubber feet from the bottom of the case.
d. Lift the case from the chassis, tilting it toward the speaker,
then disconnect the speaker leads.
e . To replace the chassis in the case, reverse the above procedure.
Be sure to reconnect the speaker leads before replacing the chassis in
The tape recorder can both record and play back at tape speeds