Kenwood TS-950S Service Manual

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CIRCUIT DESCRIPTION6) SUB CPU : HD643180X0FS6 (Display unit IC1}TS-950S/SDPort name | Pin No. Name Function 10 RemarksA port PAO 54 LFSK | FSK mode LED | © | "H': LED onPAI 55 LLSB LSB mode LED ie) | “H' LED onPA2 56 LUSB | USB mode LED | O | "H":LED onPAS 57 {| _LFM__| FM mode LED O | “H": LED onRXS | 58 | EDT _|_ Sub CPU serial data input ;CKS | 59 FCK Sub CPU serial clock input re |i; PAS 60 LAM AM mode LED O | "H": LED onPAT 61 LCW | CW mode LED } 0 [ “H" LED onEport | PEO 23| PEI 24{ PE2 25 BSY VS-2 busy input i "H'' : VS-2 busyPE3 28 TR TX/RX input | "HTX, “LY RXControl |PCO~PC7 6~14_ | AOQ~A7 | CPU low-order address bus ie)port PDO~PD7 15~22 A8~A15 | CPU high-order address bus oOPFO-PF7 | 30~37 DO~D7 | CUP data bus VO ‘NMI 4 NMI! Interrupt input for subtone synthesis i |INTO-INT2 | 2~4 | INTO-INT2 | Not used [1 | Fixed at "H" levelL RTS 45 i TN2 1750 Hz tone control output © | TONE ON, f=1750 Hz, TX: 'H"'iMPO,MP1| 72,73 |MPO,MP1| CPU mode setting input | | MPO: "L", MP1: ""H" fixedBUSPQ | 79 | BUSPQ | Not used io. | Fixed “H" level| wait | 77 | WAIT | Notused | | Fixed 'H" level| EX'tai, X'tal 74,75 i Ex'tal.X'tal_ | Crystal connection pin | $ f=11.5 MHz7) Gate array : MB622180PF (Display unit !C2)Portname | Pin No. Name Function vi) RemarksPO port Poo 34 Pal Fiuorescent display tube segment a1 drive output © | For TX VFO displayPO1 35 Pb1 Fluorescent display tube segment b1 drive output O | 7 segments (upper right)Po2 36 Pel Fluorescent display tube segment ci drive output 0 | "H" : ActivePO3 37 Pdl Fluorescent display tube segment d1 drive output ie)Po4 38 Pel Fluorescent display tube segment e1 drive output ie}Pos 39 Pf Fluorescent display tube segment f1 drive output °POS 4) Pg1 Fluorescent display tube segment g1 drive output ie)P07 42 Phi Fluorescent display tube segment h1 drive output 0 |Pi port P10 43 Paz Fluorescent display tube segment aZ drive output © |} For sub VFO displayPil 44 Pb2 Fluorescent display tube segment 62 drive output O | 7 segments {yellow}P12 45 i Pc2 Fluorescent display tube segment c2 drive output © | °H": ActiveP13 46 Pd2 Fluorescent display tube segment d2 drive output is)P14 47 Pe2 Fluorescent display tube segment e2 drive output ie)PiS 48 Pf2 Fluorescent display tube segment f2 drive output is)P16 49 Pg2 Fluorescent display tube segment g2 drive output ie)P17 50 Ph2 Fluorescent display tube segment h2 drive output ie}P2 port P20 55 Pa3 Fluorescent display tube segment a3 drive output © | For main VFO displayP21 56 Pb3 Fluorescent display tube segment b3 drive output O | 7 segments (Center)P22 57 Pc3 Fluorescent display tube segment c3 drive output O | "H": ActiveP23 58 Pd3 Fluorescent display tube segment d3 drive output ie)P24 59 Pe3 Fluorescent display tube segment e3 drive output ie)P25 60 Pf3 Fluorescent display tube segment f3 drive output ie)P26 61 Pg3 Fluorescent display tube segment g3 drive output fo)P27 62 Ph3 Fluorescent display tube segment h3 drive output ie)47