Tage Charts - Icom IC-H12 Maintenance Manual

SECT I ON
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T RANS I STO RS VO LTAGE CHA RT
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Q I O I
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0 1 03
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9
VO LTAGE CHA RTS
T RANSMIT
BA. C O L LECTOR EM ITTE R
E o r
G ATE D R A I N SOU RC E
0
0 0
0 0
0 0
0 0
0 0
0. 0
0 . -
0
0. -
.-t
.0
.:: . I
o
_ .
I . I
4 .0
-LO
0.9
-l .
0
0 .
-l .6
G
I .
G
0
•
REC E IVE
BASE COLLECTOR
or or or
DRAIN
G N D
0 . 7 5 1 .2
0
1 .8 5 . 6
0 0 5 . 9
G N D 0.7 0.8
1 .4 2.9
4 .9 4.8
0
0/0 . 6 0.3/0
0 . 3 4.8
4 .9 4 . 2 4.8
0 4.8 8 .4
.4 7.8
5.6
4 .0 0 8.4
0 3 . 7 1 . 5/0
G 1D
0 .6/0 0/7 . 8
7 .4
.4 7 .4 7.2/()
8.4
G D 0.5 7 . 5
G N D
0.6 0 . 5
4 .9 0
4 .0
0 0
3 . 4.8 1 .2
0 0
_ .o
0
_ .o
o
4 .0 0
0
__
_
G>ID
0 0
-
0
0
I .
0. 0 4 .0
0.6 0.9
1 . 5
3 . 1
GND -
0.6 0.7
3 . 2
1 .4
I
I .
I . 1 .6 4.8
I
0 . 8
1 .4 4 . 7
G D 0.6 0.8
0 . 8 0
0
D
0.6 0
-
0.5
0 8.4
0 .4 0 8 .4
D
0 8.4
4 .9
4.5 0
9 1
-
Me asuring instrument is a 50KD. / V multime ter.
EM ITTER REM ARKS
o r
SOURCE
GND RF Amp
1 .2 RF Amp
0 . 9 s t Mixer
I
GND t st I F Amp
0.8 ! st I F Amp
4 .9 T/R Switch
GND
TfR
Switch Locked/Unlocked
GND T/R Switch
I
4.9 T/R Switch
4.2 T/R Switch
8.4 T/R Swi tch
0 T/R Switch
1---
2 . 8/3 .4
Noise D e tector
SQ L C LO SE D / S Q L O P E N E D
G N D Squelch Con t rol
0/7 .2 Squelch Control
-1 - S .4---r T/R -S�i tch
1 . 7 Regulator
GND Regulator
G N D
4.9 Indicator Control
0 Indicator Cont rol
4 .9 T/R Switch
0 Mic Amp
Mic Amp
0 __J_ Mi� A112P
GN D Limite r
0 Low P-;; s s F
0.8 F M
vco�
Buffer Amp
0 .9
Level Converter
I . I
I M ultiplier
I .
0 . 8 M ultiplier
�
GND Buffer Amp
ui(;piiec
GND T/R Swi tch
0 Buffer Amp
D river
0
GND Powe r Amp
4.9 Lock F ailure Mute
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