Sanyo VHR-279E Service Manual page 24

VHR-279E VHR-289E
VHR-269SP VHR-279SP
VHR-249EX VHR-279EV
BLOCK DIAGRAMS,CIRCUIT DIAGRAMS &
PRINTED WIRING BOARDS
TABLE OF CONTENTS
Page
1. OVERALL WIRING & BLOCK DIAGRAMS
OVERALL WIRING) edeacniesctuscsvecveceevecoies sesssehanelavk. Gane ceecaceotcavaglotas uevevasne ievassuauueees chance tel ivabsaay sui squisecesseseieseccesegses 1
AUDIO CIRCUIT: ets cia teat echactesivcaciewessectsotanjeahdcussvastacetssnonsavenasticsonsiangtbedectcadesanaenseusecyeates cnbeed cayeesordteetasetsectigese 3
SYSTEM CONTROL & SERVO CIRCUIT oo... ceeeetecceeereceneeseceesenaesaneneeeaes S E E R eae Car eo ne 4
VIDEO CIRCUIT os cisccssssspevsctantuach acta as tosevsestenvece cde Seueede ebscktasocsvetevacdsdesvassecesteeagehlnauscdusiscacetesetancedadtdesansvcbenddenccestsaa 7
DECODER INTERFACE (VHR-269SP AND VHR-279SP) ......... cee eeeeeecececseseseesenesesenaseneseenseeseeseessessesenensenens 10
2. CIRCUIT DIAGRAMS & PRINTED WIRING BOARDS (P.W.B.)
CP-1 BOARD (PW-A) POWER SUPPLY ...........c:essscseccssessesecstesneesesecsessessassassacseasecssssessessusesessssasonsesasevessesaess 11
GPH1 Pi Wi Ba vississdcscbedseiesscshecbetealacestuaeasdatedoslabincshccstevuaciavealescansdaadesceseedsscededenstesnlavaa ssi scaddancddansdssaudeandbatadaunesceng 13
iC301 SYSTEM CONTROL, TIMER, TUNING CONTROL, OSC & SERVO MPU PIN FUNCTIONS ..........004 16
SERVO CIRCUIT WAVEFORMS ......... ec ceseeeecseseeseecesseseeteesecsccaeessesessessusnessusensssesecaesanesesecseneseaneseasseseetananenenaes 16
CP-1 BOARD (SY-A) SYSTEM CONTROL, TIMER, TUNER, OSC & SERVO.......cesssesesssstseesessnssseseeeseseeees 17
CP-1 BOARD (VA-A) VIDEO & AUDIO wun... eeeceeeeceseeesesesecasssusssssassucssssessusesseesesssseeasseneeneeeasaneneneeneeaeenee ns 19
VIDEO CIRCUIT WAVEFORMS .........cccccessscescssessesscecceseceecseeeceneceseessssnssusaseaessasnesecsesressestesesesoeesauenseeessesateness 21
CP-1 BOARD (AD-A) AUDIO(EXPECT VHR-269SP AND VHR-279SP) ......ccccsesessssseseseeseseesessssreseerseesesseses 22
CP-1 BOARD (AD-A) AUDIO(VHR-269SP AND VHR-279SP) .......ccccssscssssserssseeseseesesesseseneeseesseneesseeesneansnees 24
CP-1 BOARD (TM-A) DISPLAY (FLD) & KEY SCAN uu... ecccecssescssssnsstsssesseseneeserseseeesenenscneseenessessssasssaaseenenss 25
TM-1 BOARD SWITCH (VHR-289E ONLY) .0....:ccscecsseeeseseessecetsesesecssessesessecessssseusseesseaecsessseaeseasennensansrensenes 25
TM-2 BOARD SWITCH (VHR-289E ONLY) 0.0... cescssssssesssessessecsssecsecesessesesseceussersusenensesecauenesseseecsensessenseneeaes 25
A7001 DISPLAY (FLD) GRID/ANODE ASSIGNMENT DRAWING. & TABLE. ..........:.:ccsscsssesseseessteneesessersesnees 26
TM-1 P.W.B. (VHR-289E ONLY) 00... eee eeeeceeeeceseessesecausseessesaceucrsseesseseasaneaeeseeaseesenesseresseeeassenessaessenarentenes 27
TM-2 P.W.B. (VHR-289E ONLY) ..... cc eeceeesesseesssestsseseeseseneesecssrssscsessueaesssncsuceesneneseesaseeseseeaecseseassesseseesssneeeseneess 27
CP-1 BOARD (MC-A) MECHANISM SENSOR ....... ce sesccsssssssseseseeserseseceessesersenseasssesesensesenseseusnereaneneenessneeaes 28
CP-1 BOARD (TC-A) VPS/PDC (VHR-279E, VHR-289E AND VHR-279 EV) .......scccscssssssssssseseecessenseeeeeeees 28
TB, PR Weis iisiacsecceck Soccscdscs desvonc aden bexcaunecata veces lescnculeedvsdcanatedateueeoutanadveesosacasaash aauadaadg laatsddaalasasavasnsedueiondadbtsp ie 29
TB-1 BOARD TERMINAL(EXPECT VHR-269SP AND VHR-279SP) ........ccccscesccsscsssceseeseesssensessseesesesneneeeenens 31
TB-1 BOARD TERMINAL AND DECODER INTERFACE(VHR-269SP AND VHR-279SP) ........ccscseeeeeeeees 33
SE2L/E2,E,SE2/SP2,SP,EX3,EV3 91N
REFERENCE No.SM5310003