Blank Display; Al7 Test Connector; Tam Tests Versus Test Connectors . . . . , - HP 8560A Service Manual

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.
Press (m),
SOFT KEY #3, a), SOFT KEY #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 #4
A l 7
C R T D R I V E R
Figure 12-2. Al7 Test Connector
Table 12-3. TAM Tests versus Test Connectors
Probe Troubleshooting Test
Revision
X-Deflection Amplifier
Constant Current Source
Focus Amplifier Bias
Intensity Amplifier Bias
Intensity Input
Intensity Offset
Blanking Control
SOFT KEY
. The results should be sent to the printer.
C O N N E C T O R )
Measured Signal Lines
MS5
MS2, MS3
MS1
MS4
MS6
MS7
MS7
MS8
(The top soft key is #l.)
Display/Power Supply Section 12-5
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