Kenwood TS-950S Service Manual

Also see for TS-950S Digital: Instruction manual Instruction manual Instruction manual Instruction manual Service manual

TS-9505/SD CIRCUIT DESCRIPTIONPortname | Pin No. ;__Name Function ]0 | RemarksP6 port P60 97 PU16 Fluorescent display tube segment Ui6 drive output O | Upper meter segmentP61 98 PUI5 Fluorescent display tube segment U15 drive output O | "H" : ActiveP62 99 PU14 Fluorescent display tube segment U14 drive output ie;P63 100 PU13 Fluorescent display tube segment U13 drive output ie)P64 1 PU12 Fluorescent display tube segment U12 drive output | OP65 2 Putt Fluorescent display tube segment U11 drive output oOP66 5 PUIO Fluorescent display tube segment U10 drive output ie]P67 6 PUS Fluorescent display tube segment U9 drive output (e)P7 port P70 ie PUs Fluorescent display tube segment U8 drive output O | Upper meter segmentP71 8 PU? Fluorescent display tube segment U7 drive output O | “H': ActiveP72 9 PU6 Fluorescent display tube segment U6 drive output fe)P73 10 PUS Fluorescent display tube segment U5 drive output ie}P74 4 PU4 Fluorescent display tube segment U4 drive output ie]P75 12 PU3 Fluorescent display tube segment U3 drive output is)! P76 13 Pu2 Fluorescent display tube segment U2 drive output ie)| P77 14 Pui Fluorescent display tube segment U1 drive output is) ‘Control | DO~D7 24~33 | DO~D7 | CPU data bus VOport AO-A2 | 21~23 | AO~A2 | CPU address bus izNRES | 16 NRES | Reset input i 1 | “L": ResetNRD Ve NRO RD strobe | “Lt: ReadNWR 18 NWR WR strobe tl "UL: WriteNCS1 19 NCS1 Chip select 1 il "UL" : ActiveNCSO 20 NCSO Chip select 0 | "L': ActiveENO 51 ENO Output control 0 1 | “H'': Active€N1 52 EN1 Output contro! 1 i | “H': ActiveCKI 81 CKi Main CPU busy control flip-flop clock INCLI 82 NCLI Main CPU busy contro! flip-flop clear |COUT 83 DOUT Main CPU busy control flip-flop output {e)BIRO 76 DIRO Port I/O specification 0 i Fixed ‘'L"' levelDIR1 77 DIR1 Port 1/O specification 1 1! | Fixed "'L" level9) Latch : TC74HCS74AF (Display unit (C5)|Port name | Pin No. Name Function 0 RemarksQ port fele] 19 = Not used oOH Qt 18 LTM TX-M LED output O |] “H":LEDona2 7 LTA TX-A LED output O 7 "HH": LED onQ3 16 LTB TX-B LED output O | “H":LEDona4 15 LK1 Numeric keys 0 to 9 LED output O } “H":LEDonQ5 14 [LRM AX-M LED output O |} "H":LEDonQ6 i 13 LRA RX-A LED output O | "H':LEDonQ7 12 LRB RX-B LED output O | “H':;LEDon50FOR SERVICE MANUALSCONTACT:MAURITRON TECHNICAL SERVICESwww.Mmauritron.co.ukTEL: 01844 - 351694FAX: 01844 - 352554