Kenwood TH-25A Service Manual

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TH-25A/AT/ETERMINAL FUNCTIONS/BC-9 (BATTERY CHARGER)Gonnector |Terminal |Terminal FunctionNo. No. NameTX-RX UNIT (A/3) — CONTROL UNITCN1 ! 1 E Ground,2 8 Not used.3 Ss PTT SW signal. “L : TX, “H": RX.4 SDO Tone signal match/mismatchidentification signal.5 / ET Tone enable.6 EP PLL enable.7 cP Clock signal.8 DP PLL, tone serial data9 UL PLL unlock signal.10 TO1 1750Hz tone signal. TH-25E11 MuU2 Muie signal. “"H” : Mute.12 MU1 Mute signal. ‘’H” : Mute., 13 BP ! Beep signal.: 14 5M : 5V power supply for w-com and mic| 45 SV | SAVE signal output“LE: Save, “H" : Normal.16 BC Battery voitage check signal17 TX Transmit/receive switching signal.“UTD TX, CH" AX18 5M S-meter signal.i 19 SC Busy signal.20 LOW High/Low power switching signal.TX-RX UNIT (A/3) — TSU-6OohWN=78g)EhDPcPTOPTTSDOTone enable.Tone serial dataClock signal.Tone outputNat used.Tone signal match/mismatch = éidentitication signal. +Not used. ,5V power supply.Audio signal input.Ground.X-RX UNIT (A/3) — TX-RX UNIT (C/3)W2INOUSBwWN=5TDTMFMICSP—5MPTT External standby tineX-RX UNIT (A/3) — TX-RX UNIT (B/3)5V power supply for transmit.OTMF signal. TFH-25ATSignal line trom microphone! Signal line to built in speaker.Ground.! 5V power supply for z-com and mic.OASWN-A2QFAlsasB| AF volume input line.| Ground.| AF amplifier input tine.Squelch volume input line.W3TX-RX UNIT (C/3)wn=,aKMFsP5TMic mute signal. TH-25ATGround.Audio outputSV power supply for transmit.TH-25ATOTMF signal. TH-25ATBC-9 EXTERNAL VIEWBC-9 PARTS LIST x > New PartsRef. No. NewParts | Parts No. DescriptionA02-0814-03E23-0494-04E23-0606 04J19- 1426-03|Case {Charge adapter]» TerminalTerminalTerminal holder,eulbedZSSNDILNVY51