Block Diagram - Kenwood TM-481A Service Manual

TM-481A
TX-RX UNIT (X57-8130-24 B/2): Display section
MIC
MICKEY
8C
GND
PTT/TXD
ME
MIC
RXD
CM
SP
SPOUT ENCA
SPGND
ENCB
S901
W02-3704-05
ENCODER
LCD
DISPLAY
BL
Q902
RT1N141U-T111
BRI
Q904
UMG3N
40

BLOCK DIAGRAM

VR901
R31-0662-05
VARIABLE RESISTOR
MR CALL
VFO
MHz REV FUNC
KI3 KI2 KI1
KI1
KI2
KS1
KI3
KS2
IC901
COM0~3
PT6554LQ
SEG0~31
LCD DRIVER
DI
5C
BL
D903~D905
8C
B30-2337-05
KEY BACKLIGHT
SW SW
Q901
RT1P141U-T111
D906~D911
B30-2337-05
8C
LCD ILLUMINATION
SW SW
Q903
2SB1132(Q,R)
TX-RX UNIT (X57-8130-24 A/2): TX-RX section
16.8MHz
TCXOMOD
POWER
L77-1944-05
VOL
KS1
KS2
DO
CE
CL
SPGND
SPGND
SPOUT
SPOUT
8C
RXD
PTT/TXD
VOL
MICKEY
5C
CM
ENCA
ENCB
DI
DO
CE
2SC4919-S
CL
BRI
DA2S101
POWER
MIC
ME
GND
IC1
MB15A02PFV2E1
PLLE
DT
PLL IC
CK
UL
8C
Q1
5C
2SA1832(GR)F
CHARGE
Q2
TCXO
PUMP
2SC4738(GR)F
16.8MHz
X1
CV
LOOP
5C
FILTER
D/A
IC705(5/8)
CONV.
M62363FP-F
5C
RIPPLE
8C
FILTER
Q8
KTC4075E(Y,GR)
D8
DA2S101
VCOMOD
IC705(6/8)
D/A
M62363FP-F
CONV.
TCXOMOD
IC706(3/4) BUFFER
BA10324AFV
AMP
D/A
IC705(3/8)
M62363FP-F CONV.
IC706(1/4)
SUM
BA10324AFV AMP
DTMO,
TONE
Q701
IC704
IC703
D708
NJM2100V-ZB NJM12904RB1
SPLATTER
MIC
MUTE
SW AMP FILTER
MICMT
5C 8C
AGC
D709
1SS372F
IC705(4/8)
M62363FP-F
D/A
BRI
CONV.
5C
Q3
2SC4649(N,P)
Fin
AMP
Q4
MCH3914
5C
RX
VCO
8CL
SW
TX
VCO
8CL VCOMO
VCO oscillation
RX: 350.050~4
TX: 400.000~4
D
HSB
N
SQIN
DET
5C
8C
5C
BSHIFT
TX/RX
8C
SPM
AMPSW
NARROW
WIDE
MICMT
8TC
8RC
SBC
INT
RESET
POWER
UL
ENCA
ENCB