Chapter 2 Service
Troubleshooting the Instrument
Assembly Level Service Guide
2-29
2
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.
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.
Table 2-3. A4 Power Supply Inputs and Outputs
Input/Output Voltage
Connector and Pin Designation
Wire Color
Tolerance
AC-input (neutral) 0 VAC*
TB1, pin N
blue
—
AC-input (line in)
85 - 264 VAC*
TB1, pin L
brown
—
–15.0 VDC @ 0.7 A max.
TB2, pin 1
lavender
±3%
0.0 VDC (ground for –15 VDC)
TB2, pin 2
brown
—
N/A (unused)
TB2, pin position 3 (no pin)
N/A
—
N/A (unused)
TB2, pin 4
+15.0 VDC @ 2 A max.
TB2, pin 5
blue
±5%
0.0 VDC (ground for +15 VDC)
TB2, pin 6
brown
—
+5.0 VDC @ 5A max.
TB2, pin 7
red
±1%
0.0 VDC (ground for +5 VDC)
TB2, pin 8
black
—
* AC-input values are referenced to chassis ground.
Summary of Contents for 53147A
Page 6: ...Contents vi Assembly Level Service Guide ...
Page 13: ...1 Performance Tests Verifying Specifications ...
Page 55: ...2 Service ...
Page 88: ...Chapter 2 Service Troubleshooting the Instrument 2 34 Assembly Level Service Guide 2 ...
Page 89: ...3 Replacing Assemblies Disassembly and Reassembly ...
Page 104: ...Chapter 3 Replacing Assemblies Removing the Power Supply 3 16 Assembly Level Service Guide 3 ...
Page 105: ...4 Replaceable Parts ...
Page 116: ...Chapter 4 Replaceable Parts Parts Identification 4 12 Assembly Level Service Guide 4 ...
Page 117: ...5 Backdating ...
Page 119: ...6 Specifications ...
Page 125: ...A Rack Mounting the Instrument ...
Page 134: ...Index Index 4 Assembly Level Service Guide Index ...