Yaesu FT-840, Service Manual

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Unit
Parts Layout
Gote
Source
Drain
2 S K 1 60 ( K6)
( 0 1 001 )
2 S K 1 577 ( P 1 )
( 01 006, 1 01 2 )
Collector
Base Emitter
2SC28 1 2 ( L6)
0 1 003, 1 005, 1 0 1 3 ,
1 0 1 4, 1 0 1 7, 1 0 1 8,
1 0 1 9, 1 025, 1 027'
1 028, 1 042, 1 057,
1 058, 1 064, 1 065
2SC271 4Y (JY)
( 0 1 02 1 , 1 022)
Gote 2 Gote 1
Drain Source
3SK 1 3 1 (V12)
( 0 1 007, 1 008, 1 009, 1 01 0,
1 023, 1 055)
i
I\'
Emitter
Collector
Besa
2SC2053
( 0 1 0 1 6 )
FT-840 Technical Supplement
Collector
Base Emitter
2SC4047 (ZY)
0 1 002, 1 03 1 , 1 032,
1 037' 1 038, 1 044,
1 045, 1 046, 1 047,
1 048, 1 052, 1 053,
1 054, 1 059, 1 06 1 ,
1 063, 1 066, 1 067,
1 069
""''-�
'-.._'-.._Pin 4
Pin 1
M5223F P
<
o
1 004, 1 035, 1 041 )
M52 1 8A F P
( 0 1 0 1 5, 1 040, 1 043, 1 049)
Source
Dre in Gate
2S K302Y (TY)
( 0 1 0 1 1 , 1 020, 1 029, 1 056)
.J�_
Pin 7
J.J.
PC1 037H
( 0 1 024)
T C4W66F
( 0 1 026, 1 050)
'-....Pin9
Pin 1
T 062783F
( 0 1 030, 1 034)
B
Obverse View of Component S ide
Cothode 1,2
Anode 1
Anode 2
HSM2838 (A6)
0 1 052, 1059, 1 06 1 ,
1 062, 1 064, 1 065,
1066, 1 079, 1 080,
1 081 , 1 084, 1088,
1 1 22
Anode 1
Anode 4
Cothode 1
Cathode 4
HSB88WSTR
(0 1 055)
Anode 1,Cothode 2
Cothode 1
Anode 2
1 SS 226 ( C 3 )
( 0 1 075)
D
2