TEST PROCEDURES

TM 9-4910-736-14&P

h. Securing Trimmer Potentiometers. Secure trimmer potentiometers into

positions adjusted to, by applying a drop (minimum amount) of Clyptol to

the base of each trimmer.

3-8. TEST PROCEDURES.

Perform the following test procedures:

Coil High Voltage Test Circuits.

Proceed as follows:

(1)

If not already done, set FUNCTION switch to COIL and connect

BAT LEADS to 12 V dc supply.

(2)

Set COIL CURRENT control to extreme counterclockwise position.

Connect the TEST LEADS to a known good ignition coil.

(Observe

(3)

polarity; red boot to + terminal and other lead to - .)

(4)

Connect COIL PICK-UP to high voltage output of coil and connect

the black lead of the COIL PICK-UP to ground.

WARNING

When PUSH TO TEST switch is depressed DO NOT touch leads

or coil. HIGH VOLTAGE is present in this procedure.

Observe WARNING, depress PUSH TO TEST switch, and rotate COIL

(5)

CURRENT control until the meter indicates 20 to 25 KV.

(6)

Release PUSH TO TEST switch.

The meter indication should drop

to zero.

Set the COIL CURRENT control to the extreme counterclockwise

(7)

position.

(8)

Observe polarity and connect TEST LEADS to test coil (one that is

known to flashover). Connect the COIL PICK-UP to the high voltage

output of the test coil and the COIL PICK-UF black lead to ground.

When PUSH TO TEST switch is depressed DO NOT touch leads

or coil. HIGH VOLTAGE is present in this procedure.

(9) Observe WARNING, depress PUSH TO TEST switch and adjust COIL

CURRENT control until flashover occurs as evidenced by the red

COIL FLASHOVER light coming on either steadily or intermittently.

(10)

Release the PUSH TO TEST switch.

(11)

Set the COIL CURRENT control to extreme counterclockwise position.

(12)

Set the FUNCTION switch to OFF.

(13)

Disconnect all leads.

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