E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
1-15
A10 ALC P122–4 P122–28 P122–2, 27
A11 Mod Gen P132–4 P132–28 P132–2, 27
A12 Pulse Modulator J14–10 J14–9
A18 CPU P223–4 P223–23 P223–39 P223–40 P223–18 P223–2, 22
A21 Rear Panel P241–13, 14 P241–17, 18 P241–11, 12
A26 Microwave Interface P201–1 P201–2, 3, 4 P201–5, 6, 7, 8,
9, 10
P201–29 P201–13, 14,
15, 16, 17, 18
A23 Lowband Coupler/Detector J15–8
A27 40 GHz Doubler
(E8257D only)
J33–5 J33–19 J33–21 J33–7, 9
A29 20 GHz Doubler J32–5 J32–19 J32–21 J32–7, 9
A30 Mod Filter J31–5 J31–19 J31–21 J31–7, 9
A36 Quadraplier (E8257D only) J34–2 J34–5, 6, 7
AT1 Attenuator J13–1
A38 Low Band Switch Filter P142–4 P142–20 P142–2, 27
Table 1-6 E8257D/E8663D Power Supply vs. Assembly Matrix (2 of 3)
Motherboard test points: +5.2 Digital +3.4 Digital +2.6 Vdc –7 Vdc –6 Vdc +1.8 Vdc
A2 Display P11–44
A2DS1 Backlight P12–1
A3 Power Supply P231–21, 22,
25, 61, 62, 65,
P231–28, 29,
32, 35, 36, 68,
69, 72, 75, 76
P231–9, 10,
49, 50
A5 Sampler P22–3, 18
A6 Frac–N P32–3, 18
A7 Reference P42–3, 18
A8 Output P52–3, 18
A9 YIG Driver P111–64, 65,
129, 130
P111–60, 61,
62, 63, 125,
126, 127, 128
P11–57, 58, 59,
123, 124
P112–11,
12, 13, 14,
38
P112–19,
44
A10 ALC P121–64, 65,
129, 130
P121–60, 61,
62, 63, 125,
126, 127, 128
P121–57, 58,
59, 123, 124
A11 Mod Gen P131–64, 65,
129, 130
P131–60, 61,
62, 63, 125,
126, 127, 128
P131–57, 58,
59, 123, 124
A18 CPU P222–49, 50,
99,
100
P222–45, 46,
47, 48, 95, 96,
97, 98
P223–37 P223–17
A26 Microwave Interface P201–23 P201–24 P201–30,
33, 46
A36 Quadraplier (E8257D only) J34–24
Table 1-5 E8257D/E8663D Power Supply vs. Assembly Matrix (1 of 3)
Motherboard test points: +32 Vdc +15 Vdc +10 Vdc +8 Vdc +9 Vdc +5.2 Vdc
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