Keysight E8257D/67D - Page 30

E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
1-16
A38 Low Band Switch Filter P141–64, 65,
129, 130
P141–60, 61,
62, 63, 125,
126, 127, 128
P141–57, 58,
59, 123, 124
P141–57,
55, 56, 117,
120, 121
AT1 Attenuator J13–2
Table 1-7 E8257D/E8663D Power Supply vs. Assembly Matrix (3 of 3)
Motherboard
test points: –15 Vdc –5.2 Vdc –3 Vdc +3.5 Vdc +6.5 Vdc +12 Vdc
+15 Vdc st
by
Fan
Voltage
A2 Display P11–43
A3 Power Supply P231–12,
13, 52, 53
P231–80
A5 Sampler P22–2, 17 P22–4, 19
A6 Frac–N P32–2, 17 P32–4, 19
A7 Reference P42–2, 17 P42–4, 19
A8 Output P52–2, 17 P52–4, 19
A9 YIG Driver P112–4, 29 P112–1, 2,
26, 27
A10 ALC P122–3 P122–1,
26
A11 Mod Gen P132–3 P132–1,
26
A12 Pulse Modulator J14–7 P201–31,
32
A18 CPU P223–3 P223–1 P223–21
A21 Rear Panel P241–15,
16
P241–9,
10
P241–5, 6,
7, 8
A23 Lowband
Coupler/Detector
J15–10
A26 Microwave Interface P201–11,
12
P201–31,
32
A27 40 GHz Doubler
(E8257D only)
J33–4 J33–8
A29 20 GHz Doubler J32–4 J32–8 J32–1, 3
A30 Mod Filter J31–4 J31–8 J31–1, 3
A36 Quadraplier
(E8257D only)
J34–3 J34–17 J34–11, 12,
13, 14, 15
J34–8, 9
A38 Low Band Switch
Filter
P142–3 P142–26
B1 Fan Fan+ P252–2
P252–2
Fan– P252–1
P252–1
Table 1-6 E8257D/E8663D Power Supply vs. Assembly Matrix (2 of 3) (Continued)
Motherboard test points: +5.2 Digital +3.4 Digital +2.6 Vdc –7 Vdc –6 Vdc +1.8 Vdc