Kenwood TK-885 Service Manual

Also see for TK-885: Instruction manual Service manual

57TK-885 TERMINAL FUNCTIONCN7 (TX-RX Unit) ←→ CN502 (Control Unit)Pin No. Name Function1 W/N Wide/Narrow switch. H : wide2 T/R TX/RX switch. H : Receive3 MO Modulation signal.4 TO Low speed data signal.5 BEEP Beep.6 8R NC (8V)7 PSW Power switch.8 DEO Receive signal to control unit.9 MM MIC mute. H : MIC mute10 AFO Receive signal from control unit.11 OE Output enable.12 MI External MIC.13 AHK Hook signal. H : Off hook14 IGN Ignition signal.15 SB 13.6V.16 SB 13.6V.17 8C 8V.18 KEY TX signal.19 CK Shift register clock.20 DT PLL/Shift register/DA converter data.21 RSSI RSSI signal.22 LD PLL unlock detection.23 ES Shift register enable.24 EP PLL enable signal.25 EN DA converter enable signal.26 APTT No function.27 CP PLL clock.28 DTC No function.29 TXD Serial data30 RXD Serial data.31 OE Serial data.32 FSW Foot switch signal.33 E Ground.CN101 (VCO) ←→ TX-RX UnitPin No. Name Function1 ST Switched transmit input. H : Transmit2 HT RF output.3 E Ground.4 9CL 9V input.5 8CL 8V input.6 MD Modulation input.7 CV Control voltage input.CN501 (Control Unit)Pin No. Name Function1 E Ground.2 5C Logic power (5V).3 CS Chip selector signal. L : Option4 CK Serial clock signal.5 SID Serial data input.6 (NC) Unused terminal.7 (NC) Unused terminal.8 LED(A) LED anode terminal.9 LED(K) LED cathode terminal.10 NC Unused terminal.J501 (Control Unit)Pin No. Name Function1 BLC MIC key backlight control.2 PSB 13.6V.3 E Ground.4 PTT/TXD PTT.5 ME MIC ground.6 MIC MIC signal input.7 HOOK/RXD Hook detection8 CM MIC data detection.64