Teledyne Power Supply, 40 instruction manual Troubleshooting Chart, Symptom

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Check these voltages prior to using the troubleshooting chart.

TP-6 is one lead of R27 and should be 2.00 VDC. The flow signals sent by flowmeters on channels 1 - 4 can be accessed by test points on one lead of C7 thru 10 respectively in the left rear of the main PC board. These do not have test point numbers, but their positions are screen printed on the PC board.

4.2 Troubleshooting Chart:

SYMPTOM:

Display has no indication regardless of the position of the Channel Selector

 

switch and all TP voltages are 0.0 VDC.

ACTION:

Ensure the unit is plugged into an operating source of AC power of the proper

 

voltage for the unit. Remove the fuse from the back of the unit. Replace it with

 

a 0.5 Amp 250 volt fuse if it has failed.

SYMPTOM:

TP-2 is 0, but TP-3 is correct.

ACTION:

The positive voltage regulator (U1) has failed; replace it.

SYMPTOM:

TP-3 is 0, but TP-2 is correct.

ACTION:

The negative voltage regulator (U2) has failed replace it.

SYMPTOM:

All Correction factors are approximately 0 or out of range.

ACTION:

Check TP-6 (one end or R27). If this is not 2.00 VDC replace U3 (AD580

 

voltage reference).

SYMPTOM:

Correction factors not displayed when CORRECTION FACTOR switch

 

depressed or the factors are displayed regardless of the postion of the

 

CORRECTION FACTOR switch.

ACTION:

The analog switch (U6) has failed; replace it.

SYMPTOM:

The decimal point is stuck in either the flow position or in the position used by

 

the correction factor.

ACTION:

The decimal point analog switch (U8) has failed; replace it.

SYMPTOM:

TP-3 and TP-2 are both low but non-zero.

ACTION:

Check to see if the power supply source selector switch (S2) is in the proper

 

position for the AC supply being used.

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Contents Teledyne Hastings Manual Print History Table of Contents Page Specifications FeaturesGeneral Information Page Power Requirements Installation and OperationReceiving Inspection Output Voltage Electrical ConnectionCorrection Factor Switch OperationDisplay Channel SelectionFuse Rear Terminal BoardCalibration and Adjustments Display AdjustmentRange Change Front of PanelChannel Switch Selection Decimal Position Correction FactorPage Calculation of Correction Factors For Mass Units Troubleshooting Test PointsTroubleshooting Chart SymptomWarranty Repair Policy WarrantyNon-Warranty Repair Policy

40, Power Supply specifications

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