Tam Tests Versus Test Connectors; Blank Display - HP 8560A Service Manual

Connector
ADC/MUX Test
DAC Test
10 Volt Reference Test
Switch Drive Test
Buffered X & Y DAC Outputs
X Line Gen Test
Y Line Gen Test
Intensity Offset Output
A2J202 Revision
X, Y, & Z Output Offset
X Output Amplifier
Y Output Amplifier
Blanking Test
Focus DAC Test

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.
Press (-1, SOFT
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.
9-2 Controller Section
Table 9-1. TAM Tests Versus Test Connectors
Probe Troubleshooting Test
.
KEY 83 , [DOWN), SOFT KEY #I . (The top soft key is #l.)
Measured Signal Lines
MS2, MS7, OS1
MS4
MS8
MS2, MS7
MS6
MS1
MS3
MS1
MS3, MS4, MS7
MS3
MS7
MS8
MS2