44 E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
A37 45 GHz Upconverter J35–11
A38 Low Band Switch Filter P141–60, 61, 62,
63, 125, 126,
127, 128
P141–57, 58,
59, 123, 124
P142–3
a. Originates on YTO driver
b. Originates on Microwave Interface
Table 1-11 E8267D Power Supply vs. Assembly Matrix (4 of 5)
Motherboard Test Points:
LED
–5.2V
LED
–5.2 V2
a
+1.8 VDC
+12 VDC
LED
+15 VSTBY
Fan Voltage
A2 Display P11–43
A3 Power Supply J235–E4, 5
A5 Sampler P22–4, 19
A6 Frac N P32–4, 19
A7 Reference P42–4, 19
A8 Lowband Output P52–4, 19
A9 YIG Driver
P112–1, 2,
26, 27
b
A10 ALC P122–1, 26
A11 Mod Gen P132–1, 26
A13 I/Q Multiplexer P152–1 P152–26
A14 Baseband Generator P162–1 P162–26
A18 CPU P223–1 P223–21
A21 Rear Panel P241–9, 10 P241–5, 6, 7, 8
A26 Microwave Interface P201–31, 32
A27 40 GHz Doubler J36–8
A29 20 GHz Doubler
J32–8
J32–1, 3
c
A30 20 GHz Mod Filter
J31–8
J31–1, 3
c
A35 20 GHz I/Q Modulator
J34–9
c
A38 LB Switch Filter
P142–26 P141–51, 55,
56, 117, 120,
121
Table 1-10 E8267D Power Supply vs. Assembly Matrix (3 of 5)
Motherboard Test Points:
LED
+3.4D
LED
+2.6VD
LED
–7 VDC
LED
–6 VDC
LED
–15 VDC
–15 VAF
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