Troubleshooting - GE MASTR II Maintenance Manual

- -
METER
POSITION
GE TEST SET
A
(MOD-1)
B
(MOD-2)
c
(MULT-I)
D
(liULT-2)
F
(MULT-3)
G
(AMPL-1)
"D"
(AMPL-1 DRIVE)
"C"
(AMPL-1
CONTROL VOLT-
AGE)
"F"
(DRIVER
CURRENT)
"G"
(PA CURRENT)
STEP I - QUICK CHECKS
PROBABLE DEFECTIVE
STAGE
HIGH METER LOW METER ZERO METER
READING READING
READING
EXCITER
Q102, 10- Ql02, CVlOl, ICO.M, QlOl, UlOl, LlOl,
Volt
LlOl, 10-Volt Ql02,
CRlOl,
10-Volt
regulator regulator regulator or Channel
Selector switch ground,
Ql04, 10- Ql03, Ll02, Ql03, Ll02, CV102, Ll03,
Volt Ll03, CV102, CV103, CR104, Ql04
regulator CV103, Ql04
QlOS, Ql06 Ql05, Ql06 C,Jl05, Ql06, TlOl
TlOl
Ql07, Tl04 TlOl, Tl02, TlOl, Tl02, Tl03, Ql07,
Tl03, Ql07 Tl04
Ql08, Tl06 Tl04, Tl05, Tl04, Tl05, Ql08, Tl06
Ql08
Ql09, Cl46, Tl06, Tl07,
Tl06,
Tl07, T108, Ql09,
Rl44
TlOB, Ql09, Ll04,
Ll07
Ll08
POWER AMPLIFIER
Low OUtput No output from Exciter,
from Exciter CR201
Q217 Q217 No Exciter output,
Q217, Q21l, CR20l
Q205 Q205, Low Q205, Q204, Check
Output from Pos, 0 &
c
Q204
Q206, Q207 Q201, Q205, Q204, Q205, Q206-Q209
Q208, Q209 Q206-Q209 ANTENNA SWITCH K20l
STEP 3
CHECK AUDIO AC VOLTAGES
~OUIPII'E'<T REQUIRE<:
e
~UDIO DSCIL~:'.TOP
e f,C '.'1 ;:,;.
STEP 4
AUDIO 8 OSC WAVEFORMS
'OQUifi,\UJT 'lt.:CUIREO
e
AUGtO JSCtLLA!OR
• IJS~ Ill USC0~f
/
/
r----
h.~3
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---------------~--------
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AMPL~ I
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BUFFER
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;;1
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P-P CHECK
TE~~!~t7 R~~' ~~LTAGES •••••"~'"l",c,",cocc,,c,~;c,":-.,=D,,:?o,c,,c,Nc,--c,c-1
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MOD
AMPL~3
0104
- - - - - - - - - - - -
LBI4898
------~-------~
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-c?~ 1?~~"'1'
- - - - - - _____ .!.,.....__ _ _ _ _ _ ,,
' 0 2', t,•,HZ -----+~
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2~-50 MHZ - - - - - - - - - - - - - - - - - - - - - -
BUFFER
0105
MULT-I
TRIPLER
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MULT-3
DOUBLER
0108
AMPL-1
QI09
AMPL-1
0204
DRIVER
0205
PA
0206-0209
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1-----< ~~~3
RC- ~50?
TROUBLESHOOTING PROCEDURE
25--50 MHz, 100-WATT TRANSMITTER
Issue 1 11