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F-33

F-33

 

 

TROUBLESHOOTING & REPAIR

INPUT BOARD FUNCTION TEST(CONTINUED)

TABLE F.4 – INPUT BOARD VOLTAGE CHECKS

 

 

 

 

LEAD

EXPECTED

 

TEST POINTS

 

NUMBERS

VOLTAGE

COMMENTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

READINGS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLUG J61 PIN 8 (H1D)

 

 

 

J61

SAME AS

Present when Input

TO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INPUT

Switch SW1 is closed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLUG J61 PIN 6 (612)

#612

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOLTAGE

If not, check input lines and line

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

switch and wiring.

 

 

 

 

H1D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This is the Coil Voltage for the

PLUG J60 PIN 3 (238)

 

 

 

J60

 

Pre-Charge Relay. Normally this

TO

#238 #604

 

13 – 15 VDC

DC Voltage will be present 6 sec-

PLUG J60 PIN 4 (604)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

onds after Input Switch SW1 is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

activated. This 13 - 15 VDC will

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

remain for approximately 6 sec-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

onds and then be removed. The

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay is controlled by the Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Board. See the Wiring Diagram.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J61

 

This is Pre-Charge Voltage and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

will normally be present 6 sec-

PLUG J61 PIN 10 (T3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

onds after activating Input Switch

TO

 

T1

A LITTLE LESS

SW1. The Pre-Charge Voltage

PLUG J61 PIN 2 (T1)

 

THAN INPUT

should remain for approximately 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOLTAGE

seconds and then be removed. It

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

should start at zero and ramp up

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to 170 - 200 V.A.C. If zero volts -

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

check input board resistors, and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T3

 

check for a shorted main input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

rectifier.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J60

 

This is the DC Coil Voltage for the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control Relay. Normally this DC

PLUG J60 PIN 3 (238)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13 – 15 VDC

Voltage will be present approxi-

TO

#238

 

 

mately 12 seconds after Input

PLUG J60 PIN 5 (232)

 

 

Switch SW1 is activated. The

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay is controlled by the Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PC Board. See the Wiring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Diagram. Voltage will not be

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

applied if capacitor precharge is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

#232

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

incorrect.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER WAVE 455M/MSTT

Page 79
Image 79
Lincoln Electric SVM173-A service manual Input Board Function Test, Voltage

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