Upper Transmit Bank - Pin 6 Vias (3) - GE LOGIQ E9 Service Manual

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PROPRIETARY TO GE

5180483-100, R

Visual Inspection of Board (cont'd)

Troubleshooting Step 2 - Upper and Lower Transmit Bank (cont'd)

With a calibrated ohm meter, measure from the pin 6 via of each transmit transformer to ground.

1.) Place the negative lead of the meter on board ground.

2.) Place the positive lead of the meter on the pin 6 via of the transmit transformer.

A good transmit channel should read close to zero ohms. Typically five ohms or less, with a calibrated

A defective transmit channel will have a significantly higher reading. Typically in the mega-ohms or the

reading simply will not settle to a distinct level.

Repeat steps for each transmit transformer on each GTX board until the defective channel is identified

Figure 7-197 Upper Transmit Bank - Pin 6 Vias (3)

Chapter 7 Diagnostics/Troubleshooting

Troubleshooting