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3 - Troubleshooting
32
Continued from
sheet 7
Q302 base
-5V
?
Check C330, R333,
R346, and Q302
No
Q307 collector to
emitte
r
4V?
Check Q302, Q307,
R324 and R326
No
Q303 base >1.2V
(meas. from +Out)
?
Check +Rail and
Out
p
ut Sta
g
e
Yes
Yes
>1V across R323
?
Check Q301, Q305
circuits
No
No
Yes
Check C331, C333,
C339 and Q306
circuits
Yes
Figure 3-1 Sheet 8. No Output Voltage (continued)