A l 7

C R T D R I V E R

I &E”lSlON

C O N N E C T O R )

D

S K 1 1 2 1

Figure 12-2. Al7 Test Connector

Table 12-3. TAM Tests versus Test Connectors

 

Manual Probe Troubleshooting Test

Measured Signal Lines

 

Revision

 

 

MS5

 

X-Deflection Amplifier

MS2, MS3

 

Constant

Current

Source

MS1

 

Focus Amplifier Bias

MS4

 

Intensity

Amplifier

Bias

MS6

 

Intensity

Input

 

MS7

 

Intensity

Offset

 

MS7

 

Blanking

Control

 

MS8

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 should also be lit.

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

5.Press (m), SOFT KEY #3, a), SOFT KEY #l . (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 A25202. Press SOFT KEY #1 and wait five seconds.

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

Display/Power Supply Section 12-5