Agilent Technologies 53147A Assembly Level Service Manual page 83

Chapter 2 Service
Troubleshooting the Instrument
Table 2-3 lists A4 Power Supply's input and output voltages, the
corresponding wire color for each input and output, and the tolerances
specified for these voltages.
Table 2-3. A4 Power Supply Inputs and Outputs
Input/Output Voltage
AC-input (neutral) 0 VAC*
AC-input (line in)
85 - 264 VAC*
–15.0 VDC @ 0.7 A max.
0.0 VDC (ground for –15 VDC) TB2, pin 2
N/A (unused)
N/A (unused)
+15.0 VDC @ 2 A max.
0.0 VDC (ground for +15 VDC) TB2, pin 6
+5.0 VDC @ 5A max.
0.0 VDC (ground for +5 VDC)
* AC-input values are referenced to chassis ground.
Adjusting the +5 VDC Output
The +5 VDC output of the power supply is adjustable. If this voltage is
found to be outside of the tolerance range listed in Table 2-3, it can be
adjusted using R23, which is visible on the top surface of the power supply's
circuit board. When adjusting the +5 VDC output, use a nonmetallic or
insulated adjustment tool.
Assembly Level Service Guide
Connector and Pin Designation Wire Color Tolerance
TB1, pin N
TB1, pin L
TB2, pin 1
TB2, pin position 3 (no pin)
TB2, pin 4
TB2, pin 5
TB2, pin 7
TB2, pin 8
blue —
brown —
lavender ±3%
brown —
N/A —
blue ±5%
brown —
red ±1%
black —
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