(2) Measure the dc voltage listed in
e. Voltage Supply Limits Sensing Cir-
the chart below with an ME-26B/U
c u i t Test.
(1) Perform the alignment procedure
to isolate the faulty part.
for the voltage supply limits
+dc voltage to
Circuit junction
ground (Volts)
(2) If the circuit does not adjust pro-
15.7
P7801-K
perly. Prooceed to f below.
12
P7801-L
(9) If the circuit does adjust properly,
9.5
Q7801 emitter
trouble Isolation In assembly A7800
9.1
CR7801 and R7806
1.95
P7801-M
is complete.
(3) R e m o v e the test signal and set the
f. Voltage Supply Limits Sensing Cir-
T S - 1 7 7 7 / V R M - 1 ON-OFF switch
cuit Isolation.
S7901 to OFF.
(1) Adjust the 721A for an output volt-
(4) Replace the faulty part.
age of +12 volts dc and apply it to
(5) Repeat e above
the test probe.
63