Kenwood TK-250 Service Manual page 32

TK-250
DESCRIPTION OF COMPONENTS
Ref. No.
Parts No.
Description
TC7S32FU
Address decoder TA75W01FU Active filter TC7S04FU Address decoder TC35305F DTMF decoder
PCD3312CT
TONE (DTMF) encoder
XL24C01AF or BR24C01AF
E2PROM
78312AGF3553BE
Microprocesser
TA7368F
Audio power amp.
TA75W01FU
Buffer amp.
2SJ243 DC switch 2SK1824 Audio mute switch
DTC144EE DC switch
2SA 1586 (Y, GR)
Audio mute switch
DTC144EE DC switch
DTC144EE DC switch
DTC144EE DC switch 2SA 1362 (GR) DC switch
2SC4215 (Y) Clock frequency shift
2SK1588
Audio mute switch DTA144EE
DC switch
2SK879(Y)
MIC AMP level control
DA221
Voltage clamp
DA221
Voltage clamp
DA221
MIC AMP detection
TX-RX UNIT: Display section (X57-4440-10) C/3
Ref. No.
Parts No.
Description 75308BGK739BE9
Microprocesser (display)
S-8054ALB-LM- T1
Reset Switch
B30-2019-05
Red, green (LED)
830-2047-05
LCD back light
VCO UNIT (X58-4130-10)
Ref. No.
Parts No.
Description
UMG2 DC switch DTC144EE DC switch 2SC5090
RF buffer amp.
2SC4226 (R24) VCO oscillator 2SC4226 (R24) VCO oscillator 1SV228
VCO voltage contrpl
1T363A
VCO voltage control
1T363A
VCO voltage control
MA360
TX modulation
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