Keysight Technologies E8257D - Page 41

E8257D/67D, E8663D PSG Signal Generators Service Guide 41
Troubleshooting
Troubleshooting Assembly–Level Problems
Table 1-8 E8267D Power Supply vs. Assembly Matrix (1 of 5)
Motherboard Test Points:
LED
+32 VDC –24 VREF
LED
+15 VDC +15 VAF
LED
+10 VDC
LED
+8 VDC
A3 Power Supply J231–A4–6 J231–B1–3,
D1–3
J232–A4–6
J233–B1–3,
D1–3
A6 Frac N P32–7 P32–6, 21
A7 Reference P42–7 P42–6, 21
A8 Lowband Output P52–7 P52–6, 21
A9 YIG Driver P112–6 P112–5, 30 P112–15, 16, 40
A10 ALC P122–4 P122–28
A11 Mod Gen P132–4 P132–28
A13 I/Q Multiplexer P152–4 P152–28
A14 Baseband Generator P162–4 P162–28
A18 CPU P223–4 P223–23 P223–39 P223–40
A21 Rear Panel P241–13, 14 P241–17, 18
A23 Lowband Coupler/Det J15–8
A26 Microwave Interface
P201–1 1 P201–2, 3, 4
P201–5, 6, 7, 8,
9, 10
P201–29
a
A27 40 GHz Doubler J36–5 J36–19 J36–21
A29 20 GHz Doubler J32–5 J32–19 J32–21
A30 20 GHz Mod Filter J31–5 J31–19 J31–21
A35 20 GHz I/Q Modulator J34–8
a
J34–3
a
A37 45 GHz Upconverter J35–10
A38 Low Band Switch Filter P142–4 P142–20
AT1 Attenuator J13–1
a. Originates on microwave interface.
Table 1-9 E8267D Power Supply vs. Assembly Matrix (2 of 5)
Motherboard Test Points: +8 VA
LED
+9 VDC
LED
+5.2 VDC
+5.2 VAF
LED
+5.2D
+5.2 VDF
A1 Keyboard P1–12
A2 Display P11–44
A2DS1 Backlight P12–1