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5-4
TVoubleshooting and Diagnostics
Table 5-3. Power Supply Voltages
HP 82718A
Test Point
Signal Name
Voltage
1
Battery voltage
3.3 to 4.2V, typical
2
Collector of Q3
0 to 4.1V, oscillating
3
Vpl
5.1 to 5.4V
4
Vref
1.2 ±0.5V
5
Vp2
5.2V typical
Table 5-4. The HP-75 TVirns On
1. Hirn the HP-75 off, and install the pod diagnostic ROM
2. Key in RUN 'p' (rtn].
The Pod self test runs
NOTE: You may wish to key in ' D ELAY n' , where nis the number of seconds delay before
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thf^oJlp PCA
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"Paf only, «.d a 'BAD' eppop message is tlisplayed, pepl.ce the entipe
If you are doing component-level repair, and a'BAD' error message is displayed refer to the tahlpct
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