Kenwood TKR-850 Service Manual

Also see for TKR-850: Brochure & specs Function reference Instruction manual Instruction manual Programming reference

TKR-85046Final Unit (X45-374X-XX)Connector Terminal Terminal I/O Terminal functionNo. No. NameCN1 DRV I TX driver input signal (Coaxial)CN3 1 TMP O High temperature detector signaloutput for fan actionTo X57 2 BUP O Main DC/BACKUP status output(A/2) 3 PDT O RF power down signal outputTX-RX 4 FAS I Fan control signal inputunit 5 PC I TX power control signal input6 8T I 8V input during transmission7 NC – Reserved8 GND – GroundCN4 FAB O Power supply output for cooling fanFAG O Fan groundCN5 1 E – Ground2 B O Power supply output3 B O Power supply outputCN6 1 Main DC I Power supply input (from Main DCterminal)CN7 1 BACKUP I Power supply input (from BACKUPterminal)CN8 1 GND – GroundDisplay Unit (X54-3330-21) (A/2)Connector Terminal Terminal I/O Terminal functionNo. No. NameCN501 1 HK I Hook detection input/RXD input2 MIC I MIC signal inputTo X54 3 MIG – MIC ground(B/2) 4 PTT I/O PTT input/TXD outputdisplay 5 GND – Groundunit 6 NC – No connection7 SB O Power supply output after power switch8 NC – No connection9 GND – Ground10 5M O Common 5V output11 VLI I Volume control input for AF signalCN502 1 MIG – MIC ground2 MIC O MIC signal outputTo X57 3 VLI O Volume control output for AF signal(B/2) 4 5C I Common 5V inputTX-RX 5 K4 I KEY input 4unit 6 K5 I KEY input 5control 7 K2 O KEY output 2section 8 K3 O KEY output 39 K1 O KEY output 110 HK/RXD O Hook detection output/RXD output11 SOE I Output enable for shift register12 PTT/TXD I/O PTT output/TXD inputConnector Terminal Terminal I/O Terminal functionNo. No. Name13 STB1 I Strobe data for shift register14 CLK I Clock data input15 DAT I Serial data input16 PSW O Power switch output17 GND – Ground18 NC – No connection19 SB I Power supply input after power switch20 SB I Power supply input after power switchDisplay Unit (X54-3330-21) (B/2)Connector Terminal Terminal I/O Terminal functionNo. No. NameCN601 1 VLI O Volume control output for AF signal2 5M I Common 5V inputTo X54 3 GND – Ground(A/2) 4 NC – No connectiondisplay 5 SB I Power supply input after power switchunit 6 NC – No connection7 GND – Ground8 PTT I/O PTT output/TXD input9 MIG – MIC ground10 MIC O MIC signal output11 HK O Hook detection output/RXD outputJ601 1 NC – No connection(Mic jack) 2 SB O Power supply output after power switch3 GND – Ground4 PTT/TXD I/O PTT input/TXD output5 MIG – MIC ground6 MIC I MIC signal input7 HK/RXD I Hook detection input/RXD input8 NC – No connectionTX-RX Unit (X57-696X-XX) (A/2) : TX-RX SectionConnector Terminal Terminal I/O Terminal functionNo. No. NameCN1 – – O Use for RX helical BPF tuning (Coaxial)CN2 – – I Use for RX MCF tuningCN3 – – O Use for RX frequency adjustment(Coaxial)CN4 – – O Use for RX MCF tuningCN14 1 NC – No connection2 DET O Detection signal outputTo X57 3 NC – No connection(B/2) 4 GND – Groundcontrol 5 ASQ O Squelch signal outputsection 6 RSSI O RSSI signal outputof TX-RX 7 SC O Squelch control signal outputunit 8 DP I Data input for PLL9 CP I Clock input for PLLTERMINAL FUNCTION