Kenwood TM-201A Service Manual page 25

(1-13/321 x 022.5mm (29/327
Weight: 1009
Cable length: 1.5m
APPLICATION
TM-201A : 2 m transceiver
TM-401A : 70 cm transceiver
CIRCUIT DESCRIPTION
in the switch unit, a diece matrix is constructed with 02 - 04
1n order to convert 5 keys into 2 3-bit cord. The output of the
matrix is fed to the main unit after it is turned over and
amplified by the inverter Q1
In the LCD unit, the LCD display data is reshaped in wave
form by the Schmit inverter Qi02 and fed to Q101. The LCD
cata is a serial data of 3-bit and 32 bits are transfered at a
time. The Q101 has a latch storing data is changed. The LCD
display employs a static illumination system
[Re a
MR ie H
Mee Jou L
uP H L
DOWN 4 H
AB u #H |
Key matrix signal
Fig. 19 MSM5829GS (Control Ass'y IC3)
S s uate a n s acess nec wala SEGMENT OUT Nowe 7
aaa
G e e
\
RO;a je jets]
e|
tte
ARARAARAABRRAE Pomrtereteth
o tit{tlt
. oe HLM| HTH
=O)
=
a]
TApetefe
—
2 Tet
PELs
oT]
=
3 te] #
Teter
ure
"Cl
L2)~
= 7]
THI]Lt;LtlH
aa =e Eee) ATH) U4
ca = S T= 8 Ce iCeCERC)
sea
i
IT
a Teyepere
Tam| J @ lel H{[HIN|H[H] HR
21 MSM5829GS function table
Note: 1. H: Display state, The phase of this output is opposite to that of
the COM pin output.
L: Nondisplay state. The phase of this output is the same as
2. BYRBO is "
Gisplay). When BURBO pin is forced to logic "H, 0 is displayed
at the least significant digit,
3. When BURBO is forced to logic ""L, only the least significant
igit blanks.
4. When RBI is set to logic "L", the leading zeros are suppressed,
l.e., the continuous zeros, if any, at the most significant digit
own are blanked.
TM-201A