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 Open secondary No. 7 of T101 . . . .
Check T101; replace if necessary.
19
No voltage at panel lamp test
socket.
Defective switch S106, S107, or
Rotate each selector switch knob
S108.
and reset to test position.
Check continuity through the
appropriate section of each
switch (fig. 42-44).
Adjust defective contact; replace
switch if necessary.
Replace defective resistor.
R104, R120, R121, or R122 open.
20
Signal voltage is zero (measured at
test socket).
Check T101; replace if necessary.
Open secondary 3 of T101 . . . . . . . . . . . .
Rotate each selector switch knob
Defective selector switch contact.
and reset to teat position.
Check continuity through the
appropriate section of each
switch (fig. 42-44).
Adjust defective contact; replace
switch if neceassary.
Check resistances; replace defec-
R104, R120, R121, or R122
Signal voltage is low or high
21
tive resistor.
changed value.
(measured l t test socket).
Replace V101.
V101 defective. . . . . . . . . . . . . . . . .
Plate voltage is zero (measured at
22
test socket).
Replace R108.
R103 open . . . . . . . . . . . . . . . . . . . . .
Check T101; replace if necessary.
Open secondary No. 6 of T101 . . . .
Rotate each selector switch knob
Defective selector switch contact.
and reset to test position.
Check continuity through the
appropriate section of each
switch fig. 42-44).
Adjust defective contact; replace
switch if necessary.
V101 defective. . . . . . . . . . . . . . . Replace V101.
Plate voltage is low (measured at
23
test socket).
Check T101; replace if necessary.
Open secondary No. 1 or 2 of
T101.
Check T101; replace if necessary.
Open secondary No. 5 of T101 . . . .
PIate voltage is high (measured at
24
test socket).
Replace V102.
V102 defective. . . . . . . . . . . . . . . .
Screen voltage is zero (measured
25
at test socket).
Check T101; replace if necessary.
Open secondary No. 5 of T101 . . . .
Replace defective resister.
R102, R133 (TV-7A/U, serial
numbers 11200), or R129 (-)
end open.
Rotate each selector switch knob
Defective selector switch contact.
and reset to test position.
Check continuity through the
appropriate section of each
switch (fig. 42-44).
Adjust defective contact; replace
switch if necessary.
24
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