(I) Unsolder the leads at the front of the unit.
(2) With the rear of the recciver towards the repairman, remove top covers 225 on the unit to be serviced and the adjacent unit at the left.
(3) Set the band switch control to the b.5-6.0 mc band.
(4) One end of each retaining spring IGS is hooked over the band switch arm nearest the front of the chassis.
Use long nose pliers and lift the ends of the two springs off the arrns (for the antenna unit only one spring must be
removed). Also lift coupling links 161 oner the ends of the
(5) Remove the tie strips on the top of the cans, front 229 and rear 227.
(6) Remove the screws fastening the bottom tie strips 227 and 228 to the unit to be removed.
(7) Remove .he mountinS screws at the front and rear of the unit
(8) Carefully lift the unit from the chassis.
b. To replace a unit, reverse the procedure givea above.
Do not tighten the screws fastening the unit until after the band switch sections have been reconnected and the band switch operated a few times. Ihis will allow the unit to reposition itself.
34. TROUBLE LOCATION AND REMEDY.
a. QUICK CHECK.—Most service men, given a faulty receiver to repair, will seek a clue which will result in a rapid location of the trouble. If the user can be questioned,
a helpful answer is often obtained.
A careful visual and mechanical inspection of the chassis and connections is generally one of the first steps
Pulling at the various parts, including resistors, capacitors, wires and solder connections, will often locate a faulty
Inspect parts and wiring for grounds or shorted connections and opcn circuits. Inspect resistors and coils for
charred surfaces or discolorations that indicate an excessive current condition. The odor of ovcrheated insulation often tells the story of overload carried By the conductor.
If nothing is disclosed by the visual and mechanical inspection of the chassis and connections, the tubes may
next be checked, since they are often the cause of the faulty operation. This may be done with n tube checker or
by replacement with known good tubes