Kenwood TM-V708A Service Manual page 18

TM-V708A
Ref No. Application/Function
Q905 Power switch
Q906 Power switch
Q907 Power switch
Q908 Power switch
Q909 Power switch
Q910 AVR
Q911 AVR
Q912 Power switch
Q913 Power switch
Q914 Power switch
D1 Reference oscillation
circuit modulation
D2 Reference oscillation
circuit modulation
D3 LD waveform rectification
D4 Step-down
D5 Quick charge
D6 OR circuit
D7 LO switch
D9 LO switch
D11 Signal switch
D12 Drive circuit bias
D13 Drive circuit bias
D14 ANT switch
D15 ANT switch
D16 ANT switch
D17 ANT switch
D18 Transmission output detection VHF
D19 Transmission output detection VHF
D102 AGC
D200 RF switch
D201 RF switch
D202 Helical tuning
D203 Filter tuning
D204 RF switch
D205 Helical tuning
D206 Helical tuning
D207 RF switch
D208 RF switch
D209 RF switch
D210 Over-voltage prevention
D211 Over-voltage prevention
D213 Voltage OR
D214 Voltage OR
D216 Band pass tuning
D217 OR circuit
D300 Reference oscillation
circuit modulation
D301 Reference oscillation
circuit modulation
D302 LD waveform rectification
D303 Step-down
D304 Quick charge
18
COMPONENTS DESCRIPTION
Operation/Condition/
Compatibility
R8V, R8U
RM43, RM80
RS14, RM30
R8UA, RM22
RS43, RM14
PB
PB
SB
PB
SB
A band
A band
A band
Charge pump
A band VCO ripple filter
RM14/RM22
LO Doubling circuit switch
LO Doubling circuit switch
VHF TX
VHF TX
VHF TX
VHF TX
VHF TX
VHF
SUB UHF
VHF
SUB UHF
VHF
VHF
VHF
SUB UHF
VHF
VHF
RM14/RS14
RM14/RS14
VHF filter
RM22
B band
B band
B band
Charge pump
B band VCO ripple filter
Ref No. Application/Function
D305 RF switch
D306 RF switch
D307 RF switch
D309 RF switch
D310 RF switch
D312 UHF Drive circuit bias
D313 Over-voltage prevention
D314 TX RF switch
D315 Over-voltage prevention
D316 ANT switch
D317 Transmission output detection UHF
D318 Transmission output detection UHF
D500 RF switch
D502 RF switch
D503 RF switch
D505 RF switch
D507 RF switch
D509 RF switch
D510 RF switch
D602 Reverse flow prevention
D605 Reverse flow prevention
D700 Bias
D701 Bias
D702 Over-voltage prevention
D703 Over-voltage prevention
D800 Reverse flow prevention
D801 Reverse flow prevention
D803 Voltage drop
D900 Voltage OR
D902 Power supply reference voltage PB
D903 Over-voltage detection
D904 Reverse connection prevention DC IN
D905 Reverse connection prevention DC IN
TH1 Temperature detection
PANEL UNIT (X54-3290-00)
Ref No. Application/Function
IC1 Serial transmission buffer
IC2 Serial transmission buffer
IC3 AVR with reset function
IC4 Control microcomputer
IC5 ROM
Q1 Power switch
Q2-4,6,
Dimmer
7,9,10
D1 Reverse flow prevention
D2 Reset circuit
D3-23 Over-voltage prevention
(Surge elimination)
D24-30 Key illumination
Operation/Condition/
Compatibility
UHF LO
UHF TX
UHF LO
UHF LO
UHF LO
UHF
UHF TX
UHF TX
SUB VHF
UHF
UHF
SUB UHF
UHF
UHF
Reset switch detection
M5C
PR9
PR1
PKD
PKD
MIC 8V
T8A
PB
Operation/Condition/
Compatibility