Tektronix RSA3408B, Service Manual

Page: 206 / 250

Troubleshooting
5- 78
RSA3408B Analyzer Service Manual
J410
A70 DC power board
J302 J300
Test points (from left to right)
Upper: TP216 TP222 TP208 TP204 TP202 TP220
Lower: TP214 TP210 TP212 TP218 TP200 TP206
Power indicator LEDs
Figure 5- 39: A70 DC power supply board
Table 5- 7: Test point voltages on A70
Test point Normal voltage Low limit High limit
TP216 +3.3 V +3.14 V +3.46 V
TP222 --6.6 V --6.93 V --6.27 V
TP208 +6.6 V +6.27 V +6.93 V
TP204 +9 V +8.55 V +9.45 V
TP202 +15 V +14.25 V +15.75 V
TP220 --6.6 V --6.93 V --6.27 V
TP214 +5 V +4.75 V +5.25 V
TP210 +6.6 V +6.27 V +6.93 V
TP212 +5 V +4.75 V +5.25 V
TP218 --15 V --15.75 V --14.25 V
TP200 +20 V +19 V +21 V
TP206 +6.6 V +6.27 V +6.93 V
Symptoms and Faulty Modules
Fault symptoms can help you identify faulty boards or modules. Fault symptoms
and suspected boards or modules are listed in Table 5--8.