3. AM ALIGNMENT PROCEDURE (~ 3.1 AM IF Alignment ( ) 1. Connect a sweep generator to the J 153 and an alignment scope to the test point B. 2. Rotate each core of I F transformer L153 for maximum height and flat top symmetrical response. 3.2 AM Frequency Rangeand Tracking Alignment 1. Set AM signal generator to 515 kHz. Turn the tuning capacitor fully closed (place the tuning pointer at the low end) and adjust the oscillator coil L152 for maximum audio output. 2. Set the signal generator to 1650 kHz. Placethe tuning pointer in the high frequency end and adjust the oscillator trimmer on the oscillator tuning capacitor for maximum audio output. 3. Repeat steps 1 and 2 until no further adjustment is necessary. 4. Set the generator to 600 kHz and tune the receiver to the same frequency anq adjust a slug core of AM ferrite rod antenna and RF coil L151 for maximum output. 5. Set the generator to 1400 kHz and tune the receiver to the samefrequency and adjust both trimming capacitors of antenna and RF tuned circuit for maximum output. 6. Repeat steps 4 and 5 until no further adjustment is necessary. Note: During tracking alignment reduce the signal generator output as necessaryto avoid AGC action. 3.3 AM Signal Strength Meter Alignment Set an AM signal generator to 1000 kHz at 5k1-N, and adjust R178 so that the signal strength meter may read 90% of the full scale. , 1 3 4. FM ALIGNMENT PROCEDURE 1. ,Connect an FM signal generator to the FM ANTENNA terminals and an oscilloscope and an audio distortion analyzer to the TAPE OUTPUT jacks on the rear panel. 2. Set the FM SG to 87 MHz and provide about 3 to 5J.1.V.Placethe tuning pointer at the low frequency end by rotating the tuning knob and adjust the core of oscillator coil L104 to obtain maximum audio output. 3. Set the FM SG to 109 MHz and provide about 3 to 5J.1.Voutput. Rotate the tuning knob and place the tuning pointer at the high frequency end and adjust the trimming capacitor C106 for maximum output. 4. Repeat steps 2 and 3 until no further adjustment is necessary. 5. Set the FM SG to 90 MHz and tune the receiver to the same frequency. Decreasesignal generator output until the audio output level decreases with the decreasing generator output. Adjust the antenna coil L101, RF coils L102 and L103 and I F transformer L 105 for minimum audio distortion. 6. Set the FM SG to 106 MHz and tune the receiver to the same frequency. Adjust the trim- ming capacitor C102, C104 and C105 for minimum distortion. 7. Repeat steps 5 and 6 until no further adjustment is necessary. 8. Adjust the secondary core (upper) of discriminator transformer L201 so that the center tun- ing meter pointer indicates its center at no signal applied. Set the FM SG to 98 MHz and increase its output level I kJ.l.Vand tune the receiver to the samefrequency so that the center tuning meter pointer indicates its center. Adjust the primary core (lower) of L201 for minimum distortion. 9. Set the FM SG to 98 MHz at 1000 kJ.l.V,and adjust R374 so that the signal strength meter may read 90% ofthe full scale. 5. STEREO SEPARATION ALIGNMENT 1. Set the FM SG to provide I kj.LVat 98 MHz. Tune the receiver to the samefrequency so that the center tuning meter pointer indicates its center. 2. Turn the FM SG modulation off (with the pilot signal turned off), connect a frequency counter to test point J310, and adjust R311 so that the frequency counter may precisely read 19 kHz. 3. Modulate the FM SG with stereo composite signal consisting only of subchannel signal (of course a pilot signal must be included). 4. Adjust the trimming resistor R301 for maximum and same separation in both channels. 6. MUTING CIRCUIT ALIGNMENT 1. Connect a VTVM across the resistor R363 and adjust the resistor R363 until the meter reads 0.75V DC at no signal. 2. Set the FM SG to provide I kJ1Vat 98 MHz and tune the receiver to the same frequency correctly. 3. Turn on MUTI NG push switch. Shift the FM signal generator frequency to plus and minus and note both plus and minus shifted frequencies at which undesirable audio side responses are muted out. Adjust the R363 so that the same shifted frequencies mute the undesirable side response. 4. Adjust R362 for proper frequency shift at which the muting circuit operates. 7. DOLBY FM TAPE OUTPUT SETTING 1. Set the modulation of FM SG to 400 Hz, 50% (±37.5 kHz Dev.) 2. Set the FM SG to provide 1 kJ1V at 98 MHz. Tune the receiver to the same frequency so that the center tuning meter pointer indicates its center. 3. Turn on DOLBY FM push switch. Set the semifixed resistors RC01 and RC02 so that the output of the TAPE OUTPUT terminals Rand L become 580 mVat VTVM. 8. AUDIO ADJUSTMENT 1. Voltage adjustment Connect a DC voltmeter between pin terminal 804 and 805, and adjust the trimming resistor R806 for 35V DC. 2. Main Amplifier DC off--set alignment Connect a DC voltmeter with 0.5 or 1 V range between the speakerterminals and adjust the trimming resistor R707 for "zero" DC output on the meter. Repeat the same procedure for the other channel. Note: During this alignment no load should be connected to the speakerterminals. 3. Idle-current adjustment Connect a VTVM between pin terminals 708 and 710. Next, adjust the trimming resistor R719 so the VTVM reads10mV DC. Repeat the sameprocedure for the other channel. 4. Check DC off-set voltage aligned in the procedure 2 and if any DC output is observed on the DC voltmeter, adjust the R707 again for "zero" output. 5. Phono-amplifier adjustment Connect an oscilloscope to the TAPE OUT jacks and an audio signal generator to the PHONO jacks. Placethe selector switch in the PHONO position. Increase1 kHz audio signal gradually until a slight clipping on top of the sine-wave is observed on the oscilloscope. Adjust the trimming resistor R408 for equal clipping level. For the other channel adjust R409. 4 : Figure 1. Dial Stringing 5 COO3 - J314 < J305 < II J304 .1303 J316 306 J205 (:r- J:OS J "JSP6 J210 :...-....J --,-- J:;02 -~h P200 J309 P300 J310 J~ J~9 T I J317 J318 J320 J319 J1'3 J321 J307 J31lI. TP r I r--- t-----< J308 J322 I i JI60 JI" J158: -- I ,.-J I I JU04 1 .-- G I PUOI ---. r-- IJUOI I I PIOO 0-1--""- JU02 01 FM { 0-1- § ~ [~JI02 !. ~ l ~JIC1 7L 0- JUQ3 -r' ;108 ~09 D- 0008 O~ 1I -r CU02n I JI" J!~'!50 ,.J ).J1S2 JI56 IRU04 J~ )- IJ\5.5 157 MUTING t;'" ~ lEVECC- 1 I JU07 I JUO' cOO2- AM >-Z<1_ ::;; - J~ , J~ J" J210 ROO - , ~ ~ , , :--J. , : , - ••• , J309 J301 J302 J31.5 f-I I •........• ~ P300 J314 >- J310 ~-v@ ~D~ I @ ~ 7 , (j]) '-------" 8 @ ® SOOI~3 Jjp4 J<:Q9 r J203 J3U r J317 J305 I J318 3061 I J320 J319 J313 "21 J307 J30. "03 J316 ~H 1 - -- - J308 C0CJ2.~r-"1T'- 9JF-- I [0 iJ J207 J '06 >-- J007 1 JIOO 'l' ryJ2O' JI05 J202 LOO3 '- JI60 JI03-- JI6' J'58: -- PI50 1 I JJ02 JlO' JI53 Jr5r JI01 ;108 JI09 ).,'52 r-- I PIOO IIItl I - I I I ;..... :...-- n J Lc" II ~U - - -- !~-Ol)r~ ~406 J404 >-- I~ 7 ).,.v. P400 ,j, ~ ~~"-' Pore PHONO J405 I ® .£1) ~ AMP_ 02 -- I 5001-2 9 ~ JC08 JC~02 >-.-- tl JCOI ---® @- JCOJI ~\~ i ,j, r;z""' 19 < I flU l I ~ FOOl --J,. r--------;! RE J027, ,'T1iNd T FOO3 t~?N~CN..Y~ lGN c( : ,J, ~ .J J803 J802 JSOl J804 I J808 J807 J809 J810i P900 POWER SUPPLY I J8C16 I T20 __ RTOt JT2r I PTOI I [ ~tn RT02 .JT22 .•.•u I Q ? I STOI-S SOURCE + TAPE 'T17 JTl9 ,~ -- JTI6 ON .2 STOI-3 STO"O ~F I + + MUTING MONO 5101-2 ST + ..:JNO : REMOTE SPEAKER JOJ5 ...., SPOKE J(" r-- --0 L ~-o 1--0 - -0 " ----'- r {] L {] rD JOl3 MOOS - J703 J704 J,2.!.8 J714 J705 ()~, .- J701 J706 L J708 J702 L.:::. J71Q ()HOO2 P700 I MAIN AMP J711 J712 r~ J713 JOlT J709 "-----,..---- J~ --< ).1713 J705()~ - 70J J706 L .J1'02 J708 P700 ~ I MAIN AMPJ710 -000 wz -177 N:'l:'2.T:l3 1tT~.T05 ril(076319C H'I0000312 2SA763(4,'l 11I'1-13 .. -::..~. ""2." I-IT30e7~3e 1'I02OOO22! HT30904~IO HTI073,310 HK(:64919A HI(O~919A lSC87~E IS247'2 2SC94'Q 2547330 2S04I~ p.Q." 2S8~49P,O,R Figure 3. Schematic Diagram 9 ". JI04 elZ4 OluF J106 I I FUll I '00 I I ~ '122 QI",F Rl06,. RIIO '2' C1l6 OluF --------, ""03 HT30~3~18 2SC~3~8 ,, CI19 rw' C,~ ~~~F >6V II I 20PF --~ I Rloa 21K RIO? TIe1l7 41'1( O''JF I R/~l :I -- -----., CIOI I,I II ~I03 CI03 cr09 rOOt( ~PF , I ClIO I roooPF III RIOI I ~61( •... ---- r;o~---:~~~~;'>A - IFM FRONT END ~2S,~19Y C',. IL,a, I IL J102 Figure 9. FM Front End (P100) Schematic Diagram ,~ Figure 10. FM Front End (PlOD) Component Locations 14 I j - , J'61-,I I I I I _...J ~,~~ HHOO00212 31027 1-41 ~3 . I ~4 HTI04942A 25A494Y, G ";!~2 HT313272A 25CI3275,T MI'I HCIOOO~06 jJPC30C L r-P150- I AM Tl,NER II I I ,",,7 Figure 11. AM Tuner (P150) Schematic Diagram Figure 12. AM Tuner (P150) Component Locations 15 e-) I =t:::1IIII Figure 13. FM IF (P200) Schematic Diagram Figure 14. FM IF (P200) Component Locations r--- I I _-.J r------------------------------ P200 .Uor .••.••lor ""'. Hl'O_11'.2'8,/IV.11"1, 11"'. 1111I.1/' ••••'6.11'.J10.1 ••,.II~.n'./2e,n'l ••,.to. lJ', 111 --, IFM IF AMP HT308291C (25C829C) HT30~44tB(lSC644S) HDIOOOrO~ IIN60) H0200110~ (ISI~'~) HOlOOO]OZ (20A90M) I I l)IV H204 - ~"'206 H207 'U1II4 Allll~ I'UloffillOl "Ih~nl Ill). ~~'; ~~ .,v CllO Hl,e '1'0' ,101 "IJO 820 IVol I ~,)' ]lll .v _ "0 ~ " •.•••..•..• '11 ~02'" 1'0 44'" lI~rl J2'O, czoe 1'". n A14' r It..... Ill!!) It (IH UK/PI I t 0161 •• ,'0 _ ... . CUt t'O t,O "0 .,. 01" ~~ T .•. :~e' &J en r -~=-- IU~lC:-- HF2003CIC ••30 •••••'" '03"_3" I 2Sk30T HT)08Z810 a,. 25C8285 Figure 15. FM MPX (P300) Schematic Diagram 17 Figure 16. FM MPX (P300) Component Locations . JC04 I ,:C05 JC08 I .IC06 I Jcor CC03 ,.' .•. 2~\I ce04 '.F I CC02 2'" I ~~\.He02 14 OV RC04 J L ....:.a~ _ peol DOLBY FM OUT r----~Ol Heoz HBI3272A I 2SC1327S,T I RC03..' JCOI Figure 17. Dolby FM Assembly (peDl) Schematic Diagram Figure 18. Dolby FM Assembly (PCD1) Component locations J40~ I :.J Coil01 ,PF l't407. 408 HD2DOOl21 IS- 2473C v. H403. 404 HT313442A 2SCI344D,E r ~=.4-;;;- I HT313441E 2SCI344E I I JOO' P400 LP~O~P _ J402I I J403 Figure 19. Phono Amplifier (P400) Schematic Diagram Figure 20. Phono Amplifier (P400) Component locations I; 19 no, .)1'0. J710 J711 'H35 '0 ';712 C710 .ljoiF J113 IPoe 6.81( 7V ~704 R705 II( 100 t.:::.J H7'04 P700 MAIN AMP, R1'03 • OK cro, 133" ,"vC102 ;01" I '" + I _ro, IJ702 r I I I Jro, Figure 21. Main Amplifier (P700) Schematic Diagram G .~ -F06 J:!P8:; ~oV'~ J:~t:· J710 .1711 J1l2.. G' ~.!j! G 1!1~,' G ~. '. ". ~.: Figure 22. Main Amplifier (P700) Component Locations 20 J002 --- JOO' .:sIO I JOO' J~ ~a06,.. coO< .• 22"F >ov H804 H803 7.0\1 3~ cv II I .1803 r------ H808 Q8Cl HeOI r- - -, 10 44 :)v ~J'O'!r' ~ri V/i ca:c I I at ••'.. I, Figure 23. Power Supply (P800) Schematic Diagram Figure 24. Power Supply (P800) Component Locations ,, 21 r W - ---, "CO., (0. I HTI01212A ZSA 121S, T I I I I I I I I I I I -----~ Figure 25. Pre Tone Amplifier (PEOn Schematic Diagram Figure 26. Pre Tone Amplifier (PEOn Component locations Q--------------.., PHO I .~(U \._. "\U,, ••, .• 'I..T(. "A'" .(-.;IT1[ I FILTER. SP. ,..eo. , ,10(1'.' 1••0' - J '''0'·. poo··, .•••'1 Figure 27. Filter (PH01) Schematic Diagram RH16 --'#N-. RH15 .~. JH13 JH18 JH12 JH16 0000 SHOl-5 ·,'~:': · ~.. : • lit • . Figure 28. Filter (PH01) Component Locations Figure 29. Monitor (PT01) Schematic Diagram 23 8Hl>e ~2-A\lU:J Figure 30. Monitor (PT01) Component Locations ) 'I: -.~ ' JZOg...J-MZ05- PZOI DIAL LAMP ) PYOI FU"CTtOJt LAMP r--,~Mm ";10'-;1;;- ,;;;;;-, l,,~~,}~~J ,l "'~~7t7t~'~~~~'''g~~~J L"..' ",..",..",..",., "'W "~, ",.. j (IOl...... ,.•• _0 .u. ra~I' rUCII'1 --------- Figure 31. Dial Lamp (PZ01) Schematic Diagram Figure 32. Dial Lamp (PZ01) Component Locations Figure 34. Function Lamps Assembly (PY01) Component Locations Figure 33. Function lamps Assembly (PY01) Schematic Diagram ---- ~

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