Kenwood TR-7400A - BLOCK DIAGRAM

BLOCK DIAGRA!
RX UNlT (X55-1150-10)
r- ----------- - --------------- --------
I
I
I
I
L ,,-,---,-----------, +--<&--,
RXA LR - TS SMI s1 S2 S3 TI0
PLL
r-----------b sau VRA
I VCO UNlT (X50-1370-10) '
I I
TX UNIT (~56-1230-10) TXB
SELECTOR
I
ZSC458 2SC458
BURST
a V
T-----~---- -1
- - - - - - - -.(b
I I I
T'
I
I I114171919151
I
-
POWER SW
TLR-313x6
J L--------,-
DISPLAY UNIT (X54-1210- 10) 13.8V
DISPLAY UNIT (X54- 121 0- 10)
r---------- 1
I
I
DEC. DRIVER
I
SN7447AN X 3
-t 600
SWITCH BOARD
(BCD 400-799)
I I
VCO UNlT (X50-
r------
- - - - - - - - - - - - - - - - - - - - - -
I ~lvl~-N(1/537- 1/936) pw MC74416X3 zsc460 BUFF AMP
I
2SC460 ZSC460
I A ! I
I
TX OFFSET LOGIC
P.D MC4044P
l OkHz
A I
' 1
2.56MHz 160 kHz
I
, REFOSC,l/2 1/16 1/16 1~15%
UNIT T
I TD3400 H TD3493 TD3493 2~~733
(~50-1380-10) 22% - - - - - - - - - - - - - - - - - - - - - -- - -