Keysight E8257D/67D - Self-Tests 16 Xx for the A14 Baseband Generator (Option 601;602)

E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
1-56
Self–Tests 16xx for the A14 Baseband Generator (Option 601/602)
1600 Host <–> BBG Comm
• If the +3.4 VD, +2.6 VD, and +1.9 VD supply voltages are good on the A31 Motherboard, replace the A14 Baseband
Generator.
• If the +3.4 VD or +2.6 VD supply voltages are bad on the A31 Motherboard, check the origin of the supply.
— If the supply voltage is good at the origin, replace the A31 Motherboard.
— If the supply voltage is bad at the origin, troubleshoot the A19 Power Supply.
Power Supply Voltage
(Vdc)
A31 Motherboard
Connector Pins
Minimum
(Vdc)
Maximum
(Vdc)
Origin
+32 P162 – 4 +31.04 +32.96 Main Supply
+15 P162 – 28 +14.55 +15.45 Main Supply
–15 P162 – 3 –15.45 –14.55 Main Supply
–5.2 V2 P162 – 1, 26 –5.36 –5.04 A31 Motherboard
+5.2 P162 – 5, 27 +5.04 +5.36 Main Supply
+5.2 D P161 – 64, 65, 129, 130 +5.04 +5.36 Main Supply
+3.4 VD P161 – 60, 61, 62, 63, 125,
126, 127, 128
+3.30 +3.50 Main Supply
+2.6 VD P161 – 57, 58, 59, 123, 124 +2.52 +2.68 Main Supply
+1.95 VD P161 – 52, 118 +1.89 +2.01 A31 Motherboard
+1.8 VD P161 – 55, 56, 120, 121, 122 +1.75 +1.85 A31 Motherboard