42 E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
A3 Power Supply J232–B1–3, C4–6,
D1–3
J236–B1–3, D1–3
A5 Sampler P22–20, 5 P22–14, 29
A6 Frac N P32–20, 5 P32–14, 29
A7 Reference P42–20, 5 P42–14, 29
A8 Lowband Output P52–20, 5 P52–14, 29
A9 YIG Driver P112–17, 18,
42
a
P112–3, 28 P111–64, 65, 129,
130
A10 ALC P122–2, 27 P122–64, 65, 129,
130
A11 Mod Gen P132–2, 27 P132–64, 65, 129,
130
A13 I/Q Multiplexer P152–2, 27 P151–64, 65, 129,
130
A14 Baseband Generator P162–2, 27 P161–64, 65, 129,
130
A18 CPU P223–18 P223–2, 22 P222–49, 50, 99,
100
A21 Rear Panel P241–11, 12
A23 Lowband Coupler/Det J15–12
A26 Microwave Interface P201–13, 14, 15,
16,
17, 18
P201–23
A27 40 GHz Doubler J36–7, 9
A29 20 GHz Doubler J32–7, 9
A30 20 GHz Mod Filter J31–7, 9
A35 20 GHz I/Q Modulator J34–5,
6
b
J34–7
b
J34–28
b
A37 45 GHz Upconverter J35–7,
8
J35–1, 2, 3,
11
J35–16
A38 Low Band Switch Filter P142–2, 27 P141–64, 65, 129,
130
AT1 Attenuator J13–2
a. Originates on YTO Driver
b. 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
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