Digital Equipment DECmpp 12000/Sx 100, Руководство по обслуживанию оборудования

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3.1 Voltage Measurements and Adjustments
3.1 Voltage Measurements and Adjustments
For all voltage measurements and adjustments:
• Use a digital voltmeter to measure the supplies.
• Measure the voltages at the points shown in Figure 3–1.
• Use an insulated tool to make any adjustment.
Note
Adjust voltages only if they measure outside the tolerances specified in
the following lists.
Follow these guidelines for adjusting the DPU power supplies:
• +5 V supply
Adjust only if it is outside the range of +4.95 V to +5.05 V.
Adjust to exactly 5.0 V.
• –5.2 V supply
Adjust only if it is outside the range of –5.25 V to –5.15 V.
Adjust to exactly –5.2 V.
• –12 V supply
Adjust only if it is outside the range of –12.15 V to –11.85 V.
Adjust to exactly –12 V.
• +12 V supply
Adjust only if it is outside the range of +11.85 V to +12.15 V.
Adjust to e12 V.
Figure 3–2 shows the power supply adjustment points and wiring for the
DECmpp 12000 DPU.
Figure 3–3 and Figure 3–4 show the supply adjustment points and wiring for
each of the power supplies used in the DECmpp 12000–LC DPU.
Checking and Adjusting DPU Power Supply 3–3