HP 8560A

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