Table 9-1. TAM Tests Versus Test Connectors

Connector

Manual Probe Troubleshooting Test

Measured Signal Lines

A2Jll

ADC/MUX Test

MSl, MS3 through MS6, MS8

 

DAC Test

MS2, MS7, OS1

A2J201

10 Volt Reference Test

MS4

 

Switch Drive Test

MS8

 

Buffered X & Y DAC Outputs

MS2, MS7

 

X Line Gen Test

MS6

 

Y Line Gen Test

MS1

 

Intensity

Offset Output

MS3

A2J202

Revision

 

MS1

 

X, Y, & Z Output Offset

MS3, MS4, MS7

 

X

Output

Amplifier

MS3

 

Y

Output

Amplifier

MS7

 

Blanking

Test

MS8

 

Focus DAC Test

MS2

Blank Display

Use the following procedure if the instrument’s .display is blank. This procedure substitutes an HP-IB printer for the display.

1.Connect the printer to the HP 8560A and set the printer’s address to the value required by the TAM. This is usually 1.

2.All of the power-supply indicator LEDs along the edge of the A2 Controller assembly should be lit.

3.The rear-panel CRT +llO VDC ON indicator might not be lit, even if +llO V is present.

4.Connect the TAM’s probe cable to A2Jll.

5.Press (-1, SOFT KEY 83 , [DOWN), SOFT KEY #I . (The top soft key is #l.)

6.The yellow LED next to A2Jll should blink approximately ten times. If the LED fails to blink correctly, troubleshoot the digital section of the A2 Controller assembly.

7.Move the probe cable to A2J202. Press SOFT KEY #I and wait five seconds.

8.Press SOFT KEY #4 . The results should be sent to the printer.

9.Move the probe cable to A2J201, press SOFT KEY Xl and wait five seconds.

9-2 Controller Section