BH1760 Printed Circuit Board Assembly

55-4920-244-14

(12) Replace capacitors with broken

a. Removal.

or damaged leads and any capacitor which shows

(1) Remove deck assembly (para.

excessive leakage or shorted condition. Replace

4-32).

capacitor if capacity shown on tester is below

(2) On printed circuit board assem-

rated value.

bly (49) locate terminal designators adjacent to

solder terminals and make sure connecting wire

(13) Replace transformer if any wind-

attached to solder terminals is marked with a cor-

ing is open, shorted to another winding, or

responding number or letter. Identify and tag

shorted to the case.

any unmarked wires.

(3) Unsolder all connecting wiring

4-18. BH1760 Printed Circuit Board Assembly

from printed circuit board assembly.

(4) Remove attaching screws (50)

and spacers (53) and remove printed circuit

The circuit board assembly contains ad-

board assembly from deck (128).

justable potentiometers used for adjusting the in-

sulation check circuit and precision resistors used

b. Disassembly. No disassembly of the

in the insulation check circuit and other circuits

printed circuit board assembly is required. Indi-

in the tester.

vidual components can be tested in place by con-

Figure 4-8. Deck Assembly (sheet 1 of 4).

4-16