GE Mastr II Maintenance Manual page 13

STEP I • QUICK CHECKS
- -
METER
PROBABLE DEFECTIVE STAGE
POSITION HIGH METER LOW METER
ZERO METER
GE TEST SET READING READING
READING
EXCITER
A Ql02, 10- QI02, CVlOl, ICOM, QlOl, UlOl, LlOl,
(MOD-I) Volt LlOl, 10-Volt Ql02, CRlOl, 10-Volt
regulator regulator regulator or Channel
Selector switch ground.
B
Ql04,
10- Ql03, Ll02, Ql03, Ll02, CVI02, Ll03,
(MOD-2) Volt Ll03, CV102, CV103, CR104, Ql04
regulator CV103, Ql04
c
Ql05, Ql06 Ql05, Ql06 Ql05, Ql06,
TlOl
(MULT-I) TlOl
D Ql07, Tl04 TlOl, Tl02, TlOl, Tl02, Tl03, QI07,
(MULT-2) T103, Ql07 Tl04
F
QlOS, Tl06 Tl04, Tl05, Tl04, Tl05, QIOB, Tl06
(MULT-3) QlOB
STEP 3
CHECK AUDIO AC VOLTAGES
EQUIPMENT REOUIREC
G Ql09, Cl46, Tl06, Tl07, Tl06, Tl07, TIOS, Ql09,
(AMPL-l) Rl44 TIOB, Ql09, Ll04, Ll07
• AJDIO OSCILLATOR
• AC VTVM
LlOS
POWER AMPLIFIER
"D'' Low Output No output from Exciter,
(AMPL-1 DRIVE from Exciter CR201
STEP 4
"C" Q210 Q210 No Exciter output,
(AMPL-1 POWER Q2IO, Q204, CR201
AUDIO
a
OSC WAVEFORMS
EOJIPMON I REQJIRED
CONTROL VOLT-
• t\UDIO oJS:'LLATOR
AG~) • 0551L~os:u~E
"F" Q202 Q202, Low Q202, Q201, Check
(OOIVER Output from Pos,D&C
CURRENT) Q20l
"G" Q203 Q20l, Q202, Q203, Q202, Q20l,
(PA CURRENT) Q203 Q210
1 - - 8 . 3 3 16.67MHi
--+--------- --------
~:-]---''
l_
(~~~ _j---- --
~~T lougl~z:m~~~~~oR ~----_c:~~-'-''-'-::.:_ ___ _
OUTPUT QC 1.0\' R"'S
~CfE- A~ RMS OR PEAK
READI~G VOLT METER
WILL HOM-' 112 TC II~
oJf Pl;.A~- TC'- PEAK
READINGS
SCOPE
SETTING
IOOMV P-P
46 MV RMS
1.1 V P-P
0.36V RMS
FREOUEN~>
D VIOUl
1-41
BUFFER
0101
MOD
AMPL-1
0102
MOD
AMPL-2
0103
STEP 2
CHECK
TE~~!~~~ R~~~~~~LTAGES •--~)>~~~~ ~---'---''-"---
• G ~ TEST MOOEL 4EX3~'1
"
• 2·~',000 01-llot-PER-VOLT METER
Nl)-[ A~c DC RF:AOINGt. TAKEN WITH
~HE TRAI>:SMITTER KEYED
~-~·8-417MHZ
MOD
AMPL-3
0104
BUFFER
0105
- - -
6-Z~~I('
';MHZ
--------4---
MULT-I
TRIPLER
0106
TYPIC,\L MULT 2 'lE-"'DING AT ,
POS D ShC·~LD BE
0.56V
~-~
I
~' ___ ____j
MULT-2
DOUBLER
0107
V-DC
T fPIC4L M"JLT 3 READING AT
p )$. F SHGULD BE
0.45V
l_ ______
_ j
-~~~-25MKZ------o~------
MULT-3
DOUBLER
OIOB
TYPICAL MIPl-1 READIN~ AT
POS. G SHOULD BE
0.3V (3E-50MHZ)
I 0.5V (25-36 Mill)
r~
AMPL-1
0109
qr~
V-DC
IYPICAL
Ar~PL-1 RE~'JINGS
AT
POS. 0 ~HGUI D "
~~
_'\OMHZ I0.5VI25MHZ)TO
C.45V {30 MHl)
3C-~6MHZ
0.6V 130MHZITO
'0.5V 136MHL}:::-
36-42 M~Z
0.5V 136MHZITO
~QMHZ
0.4V 142MHZI
, 0.65V142MIIZITO
[ 0.5V ISO MHZI
25-50 ~HZ - - - - - - - - - - - -
AMPL-1
0201
'\ICLTAGf ~VCLTACE READI~3
X 15
AMP--I
J205-3
DRIVER
0202
{PelS HJN C:
- - - - - - -
PA
0203
l
rA :uRRENT
J205~£ (+i
J205-5(-)
(P::JSIT 0~ G)
V-DC
LBI-4732
J201
'"
TROUBLESHOOTING PROCEDURE
25-50 MHz, 50-WATT STATION TRANSMITTER
INTERMITTENT & CONTINUOUS DUTY
Issue l
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