Kenwood TK-620 Service Manual Supplement

VHF LOW BAND SYNTHESIZED |
SERVICE MANUAL
©1989-3 PRINTED IN JAPAN
B51-8000-00 (QO) 1125
SUPPLEMENT
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SRO MMAR IEE A NIN AL ATER EAR TORR I TAIES SOM NL SS LENE QT EEL SELON I STE EI EE
CONTENTS
EINE AL cocce seca cicsca tease ci ctatnsies aa eaneseieesnacetaciedncsedieeetiseastneecodeaeatecterteeeat 2
DISASSEMBLY FOR REPAIR nic. cccccscscccsiscccccsccccsaseccscccesnsssevsesesscaviencssenteees 2
CIRGUIT DESCRIPTION ovcasveseisctveccactesicccsescstesesscedsteeseveseeceuenciniesteciecivvaseesds 4
SEMICONDUCTOR DATA. .......c:cccccessersoesesersssecsnesnacsnnsensensensecnenssansssssseesees 6
DESCRIPTION OF COMPONENTS ...........::ccccsssccesensesseeeecsseensesenersuseseseseese 6
PPPS ESE sasceccins secpacuncacsannadancnianvarnannaccanadencassxestuansaucasocesusesanasanncesvaxtsbeetes 7
DISASSEMBLY oecckctscsessenssccveatecdwidndoccocscedsedsontacsateveavedddvestestedeedeuceeiw takes 12
PPC IRIING aies sess ccaiestesasdce du ceseiatn ive anvauentestel piieledtexsinsdctaletecassestenceseenr: 13
PDIUSTIVIENY i Sotiscidisccatecseutiecsdcanitsvantscutaatacedsdausdedsdasansce. cathinecvanedeecossesees 14.
TERMINAL FUNCTIONS csesssdcssied stecesactccsadassSncencccensstucenteeaseavoncvasessonsenents 20
SGHEMATIC DIAGRAM wscscscscesisisiscecsccctssccewcesssuccveserenesiisavicieteeaseasiaecaciere 21
BLOCK DIAGRAM siscciscsscscicscscsssnceaticesitatescnssinniianaiieenticeeieenstomne 25
PC BOARD VIEWS
PLN AICUINET (4G-S24 OAD euctcoucepsbataasaversarsuesecetesensexiasassaenant aentadesesedins 27
DRIVE UNIT (X45 3 260K) sicscsrecwecsnecutsesswedsaduaisiavsnctsacedlavendesssvecseunecias 28
SPECIFICATIONS iosiscepecpecssb cctoshacdecitesevasAiereeeeteeease BACK COVER