Generac Power Systems TXP User Manual

Page 43

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RESULTS: 1.) Tests Good.............................................. Go to

Paragraph

’’C”

2.) Tests Bad.............................................Replace

Rotor

C.) Inspect Brushes and Slip Rings. Replace Brushes if cracked, broken

or less than 5-/16 inch long. If Slip Rings aire dirty or tarnished,

clean with fine sandpaper. DO NOT USE EMERY

CLOTH.

Then repeat Test "A”.

RESULTS: 1.) Tests Good............................................Continue Tests in "Diagnostic Flow

Chart", Section 3

2.) Tests Bad.......................................... Replace Rotor Assembly

TEST 40 -

FIELD BOOST

Pin No. 4

White

Receptacle

Field Boost:

From PCB Pin No. 2, to

White Receptacle Pin No. 4,

to Brushes & Slip Rings,
To Rotor Windings.

A,) Unplug the Ignition Module

from its receptacle to prevent the

engine from starting. At the rear

of the control panel (on the panel

floor), disconnect the white conn

ector plug from its receptacle.

Set the VOM to "+DC" and to a scale

that will permit

volts to be

read. Connect the Positive (+) test

probe to white receptacle Pin #4

and the COMMON test probe to Ground.

Crank the engine. Meter should indi

cate about 9 - 1 2 volts DC. Reconn

ect the white connector plug before

proceeding.

RESULTS: 1.) Checks Good...............................Continue|with "Diagnostic Flow

Charts", Section 3

2.) Checks Bad............................. Go to Paragraph "B"

B.) Unplug the connector plug from the Printed Circuit Board and from

the white.receptacle. Set VOM to "+DC" and to "Rxl" scale. Zero the

meter. Connect one meter test probe to printed circuit board connect

or plug (Pin #2). Connect the second test probe to white receptacle

connector plug (Pin #4). Meter needle should swing all the way upscale

to "zero

RESULTS; 1.) Wire #4 checks good..............................................Replace Printed Circuit

Board

2.) Wire #4 checks Bad............Repair/replace Wire #4

RESULTS: 1.) Checks Good, but checked Bad

in Paragraph "A"..........................................

2.) Checks Bad.

Check Wire #4, between the

.Printed Circuit Board and

white receptacle

.Replace Printed Circuit

Board

4.22

Issued 6-78