Description Of Components - Kenwood TK-250 Service Manual

) DESCRIPTION OF COMPONENTS
J
TX-RX UNIT: TX-RX section (X57-4440-10) A/3
TK-250
)
Ref. No.
Parts No.
Description
NJU7201U50
Voltage Regulator 5V
MC3372V
IF system
MB1512PFV-G-BND
Phase locked loop system
NJMI458M
Current detector (APC) M67755HA(K,M) M67755LA(K2,M2)
RF Power amp,
DTC144EE
DC switch DTA114YE DC switch
DTA123JE
DC switch
2SJ243
DC switch 2SC4617 (S) DC switch
2SB1119(S)
DC switch
2SC4617 (S) Ripple filter 2SK208(O) Buffer amp,
DTC143EE PLL unlock detector
2SC4215 (Y) IFamp,
2SA 1832(GR) PLL unlock detector
2SC5090
RF buffer amp, 2SC5066(O) RF buffer amp.
SGM2014M
Mixer
2SC4226(R24) RF amp. TX driver
2SB1119 (S) DC amp.
2SK1215(E) RF amp.
DTA123JE
DC switch DTC144EE DC switch
2SC4617 (S) Temprature protection
D1F20
Reverse polarity protection
1SS368
Current steering
1SS368
Current steering
HVU350
Varactor tuning
HVU350
Varactor tuning
HVU350
Varactor tuning
MI809 RF switch 1SS312 RF switch HSM88AS
Overload protection
TX-RX UNIT: Control section (X57-4440-10) 8/3
Ref. No.
Parts No.
Description
TA75W01 FU Buffer amp., Suming amp. TC7S66FU Audio mute switch NJU7201U50 Voltage Regulator 5V NJU7201 U50 Voltage Regulator 5V TA75W01 FU Active filter M62363FP
D/AConverter (Adjustment)
TA75W558FU Active filter, Limitter MC33172D
Audio amp., Active filter
TC74VHC573FS Address latch TA75W01 FU Buffer amp., DC shift TA75W01 FU Active filter, Audio amp. HN58C257T-20E2PROM XRU4094BCFV or BU4094BCFV
Shift registor
TA75W01 FU Active filter, Audio amp.
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