Power Supply - Kenwood TK-2402(V) Service Manual

7. Power Supply

There are fi ve 5V power supplies and three 3.3V power
supplies: 50M, 50V, 50C, 50R, 50T, 33M, 33MS and 33B.
50M and 33M are always output while the power is on.
33MS is always output, but turns off when the power is
turned off, to prevent malfunction of the MCU.
50C is a common 5V and is output when SAVE is not set
to ON.
50R is 5V for reception and output during reception.
50T is 5V for transmission and output during transmis-
sion.
50V is 5V for the SP/MIC connector.
33B is 3.3V for the baseband IC (IC705).
BATT
G
TK-2402(V)/2402/2406/2407
CIRCUIT DESCRIPTION
F600
2.5A
F601
1A
SB
IC702
MCU
50TC
BATT
50RC
INT
VCC
RESET
33MSC
Fig. 9 Power Supply
IC703
AVR
IC603
AVR
IC602
AVR
IC601
AVR
IC600 IC604
DET AVR
IC605
DET
+B
33B
50V
SB
50C
50M
Q601
50T
50T SW
Q602
50R
50R SW
33M
Q606
33MS
33MS SW
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