Eico HF-85 Instruction Manual Download Page 7 | Manualshive

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Summary of Contents for HF-85

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Page 2: ...ependent bass and treble tone control circuits In each channel Each tone control circuitcortsistsofa feedback amplifier palr 30db of feed back driving true variable crossover feedback tone cmtrol stage Bass and treble controls do not Interact with each other or affect the level Bass controls In both channels and treble controls in both channels are concen tric Controls may be operated indivIduoMy ...

Page 3: ... Input in db down from lOmv input level For high level inputs value given is equivalent noise input in db down from 0 5V input level I m Distortion 60 and 7000 cps at 4 1 IM Dl V RMS OUT 0 52 0 5 V 0 03 l OV 0 04 2 0V 0 07 3 0 V 0 11 4 0V 0 17 5 0 V Harmonic Distortion 2 20 OOOcps 0 1 at 3V RMS out 0 15 at 5V RMS out Tone Control Range At lOkc 15db boost 15db cut ot 50cps li b boost 15db cut Equal...

Page 4: ...emplate is level with the top of the amplifier mounting shelf 2 Use an awlornallto pierce the centers of the four extreme outers holes For mounting the control plate to transfer their locations to the con sole panel beneath 3 Trace out the rectangular cut out with an awl or nail ond then pierce the centers of the Four 1 2 holes one in each corner of the cutout 4 Remove the panel template 5 Drill t...

Page 5: ...istors Rj ccm be determined from the desired loading resistance R bythls formula _ 100 000 x R 100 000 R orthi5table forR 50K 5 u eRs lOOKfi for R 33KQ use Rj 50KG for R 25Ka use R 33Kfl NOTE All ceromic cartridge manufacturers hove de veloped simple networks which when connected to the out puts of their cartridges result in a characteristic identical to that of magnetic cartridges By interposing ...

Page 6: ...ct ar d its level control to maximum In the case of the EICO HF12 HF20 or HF32 integrated ampl1fiers a more direct connection to the power amplifier sections may be made by connecting to the TAPE OUT jacksof these units set ting the LEVEL control and LOUDNESS control if any to maximum In the case of the EICO HF52 integrated amplifier connect to the ELECTRONIC CROSS OVER OUTPUT jack and snip the co...

Page 7: ...of level bass and treble in both channels for different records program material cmd de sires os to listening level SELECTOR Switch The SELECTOR switch selects corre sponding pairs of Inputs to both channels The progron source being fed to any of these poirs of inputs may be either stereophonic or monophonic The M OE switch takes care of setting up the preamplifier according to the type of the pro...

Page 8: ...FEEDBACK PAIR AMPL CH 2 BAKENDALL TONE CONTROLS CH 2 CH 2 TAPE OUT PREAMP OUT CH 2 FIG 2C STEREO NORMAL CH l HIGH CH 1 LEVEL INPUTS TAPE OUT CH I LOW LEVEL INPUTS CH 2 LOW LEVEL INPUTS CH 2 HIGH CH 2 LEVEL INPUTS TAPE OUT PREAMP OUT CH 1 PREAMP OUT CH 2 FIG 2D STEREO AVERSE CH 1 HIGH CH 1 LEVEL INPUTS TAPE OUT PREAMP OUT CH 1 CH 2 TAPE OUT FIG 2E MONOPHONIC TUNER AUX 7 ...

Page 9: ...hin reason until a more satisfactory balance is achieved leaving the bass control for the more favored channel at the Oor flat position If the discrepancy is great turn down the bass in the more favored channel as well os turning up the bass In the less favored channel In order not to use excessive bass boost in the less fovored channel Note that excessive boost in the less favored channel will us...

Page 10: ... o r II 8sic 88 g c ll s s r s nun J 8 3 E c M c S I O J g p d b i l Mil o B 1 z S c 2 p 2 2 J O I 8 g a Z o 2 g H ni il g J o I S __ 2 U S C c 3 1 1 1 o i 1 5 5 I o S t i c o S I lz S m llgl is 1 3 J 1 J 5 j J S S 2 Z 2 z slaSiB S 5 S E ill iUi 2 8 2 1 S t ill s J Jj2 5 p J5 I s 8 g 2 8 J 5 i 2 o ijol a 8 S I t I S a J s illi pi I i I 5 a 8 8 O e 1111 5 a 8 I I E 6 p a s o S p o JI 2 J 21 I e g I...

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Page 12: ...i I 3iSg S S S I 5 1 5 1 Jit g g a 2 go I u 8 J i g g o 8 2 ag oE l S K 2 i 5 9 3 i B o il J Jllllffl W OT 8ii j7 5 Jj3t 2 ip 2 S ia 8 I 0 o90 Pci ll ilfli f i I l s S S2 I r2i sTEO i 0 N tJ 2 o O _ Q D O I littSiisJitl si S j 4 bI l l ti l l I 5 Sjljjopll a g v 2 2 3o t 2u E Ei i i pgrl ljl8 1 V 5 i 8 J Is liililflih I 1 S 3j plia l I i 5j3 2 o i l g i 5 2s S 6 S 3 S 8 3 fl 5 g 9ile Sgitp ofe 0 2...

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Page 15: ...BAKELITE INSULATOR Fig 3 ...

Page 16: ...7C jack strips J5 6 7 as shown on the input bracket Use four 6 32 screws four ...

Page 17: ...R45 ...

Page 18: ...3 g 8 c 0 9 S p Ilf 111 II 8 J i fsl V ae 0 3 111 5 o tj c _ i o yv o o I il Sc U J 2 o 8 2 j 2 o c i I S i J 1 w V I jS s si SS lai a 52 7 i5 s i g E 3 g E oTi f o Q 5fi p g v a Si I f j 5 iS f 8 o S w 2 5 8 g wS D S 2 s f el J 1 s s u sa g I 20j c Sg OR ji2 Ip Ov PQ a P g M _g_Q oX Q 8 Oia o 2 o _ 21 i w 2 i it o S d S I sl 2 5 o 3 8 1 J I S J i 8 i 5 s 1 I t cO rt cXwji o c X _sf 2 E iS c 8 a s...

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Page 20: ...2 i r O V n S N S Si r si 1 5 S N S S s ji X s s 13 iJ IS si S i J j 11 Jl 8 a st 5 1 iij i o s as Si s s I 5 3 1 q p TJ 6 J S o i 5 I 2 6 1 E S 8 ii n 25 i 5 5 42 8 x 8 t I 9 2 2 1 cr M 8 Si 4 i s 2s v s X j 1 5i 2 is Ig 8 5 o S 111 ll i I s i u eJ a o j2 1 ocT 0 1 2 J ci 2 w g iC iZti gC iC STS O S 3 TJ 8 3 S rf 8 S 8 5 0 O 3 Jj X S 5 S2 g J g Uf o c I I 0 0 Z J g c C U o 2 o i 8 o 5 2 o 0 i J i...

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Page 22: ...V 0 I c o U u u Xg 1 XgS fc S ci ri i Oill o 2 si 2 s S 2 ti ...

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Page 24: ...l l to Oh i 2v i CN E w o 2u 8 t3 Us s 5 i 2 5 a tj sS se I s 2 2 8 gf 0 12 U CDC 000 2 rs 5 Ii E S x S j ll sig X I I fi 5 f S v S n I I E I B j I I 5 8 I tJ E l S 3 a4 fsji y C s ai J 1 f I ll S V X o G v u il ju w oS E 0 Si 3 J2 JL 1 3 x 1 5 2 lS 3 l 2 1 i 0 0 ffS J u9A w m l s d rt la 2 i S3 y s 2 G E 2 i 4 5 f I li 5 s 1 1 7 v q ir 2 i ajJ a I li GS N N lie S 5 J X ...

Page 25: ...16C ...

Page 26: ...CO 1 5 ic sg S O eo 0 tt E C J 2 CO o U s S i s J J O 8Z S i 3 38 p u g 0 in 8 o f 9 s o B S a 7 _if S C o e U N o 3 S 1 SI u 2 4 0 P u 2 1 e e Z jU t3 vS S _ u 7 ojA d 8 0 p lo 5 s I u t I i I g u o S N N is 11 i p coL i O CN 6 9 iis ii I Su 1 1 U P9 p g s S l 1 It o si U lq 7 S Ji 22 5 9 1 i O T3 S Sn i E s e S s 8 s ds II i i Z3 I 5 VIP tegs o 5 A T J sg N R 7 2 ia O E J i I I is 5 7 x w 1 E 7 ...

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Page 28: ... 3 sTlJ c s S E o p H g S J Ii1 o e 8 o i S i l 4 S N Ji ii si Jf S i S 5 n i _g r T o 1 15 S ss n 81 S r4 O 1 O 8 i 1 3 8 J 8 gu 1 Ii Ii S 2 u S IJ J ii l l Ii I 3 ia sl i 4 K S l St l 3 ll ii 1 Si l V i 1 1 s li i 3 i S r s ga is ij sj S as vN i e g ii So g 3 g 1s jji s 3 ii 8 1 m IK 111 U ii h pif 3 i 4 a i 5 jt a i 3 i 5 Jis I oclf o li3 i a 1 4 Eg iFsi i iS s i fi 1 6 c i t E S ...

Page 29: ...Side Bracket Tinner ...

Page 30: ...s c J 2 8 p i i i ft I 8 il I g HI 8 S p o 2 4l s I a S s O 2 s gsl l l g S lU ij o g I I HlHi 8 W 0 o ji i 6 _g Z p p i p O I 2 1 II S g j i i S g s c P 0 III i l t I l 8 pj g 2 1 4 11 i l 2 g 3 8 ll J s 3 2 p a s c 2 0 1 2 S i 9 E g i 8E 2 2 8 23 i 22 d S f I B g 2 SI i Hn gl S I i o 1 i 3 S o f2 e S c c a1l8 2 8 l i o 2 8 I t If Ein I a H B 8 8 8 I I 11 5 4 I 3 M 5 i U itl lB I 1 g 5 8 si i E i...

Page 31: ...g s 5 g 3vRS s i a I l Tj e 8 s S C tt 9 o o c Q o eI 3 I J I 0 o c n js SoS S Sl o g 3 2 IllOlii 1 if a s 5 11 5 2 S j 8 1 1 j f l I 2 a j s j S g S 2 I g 1 xig 5 S g 9 i Q 2 8 3 8 S Hi sl S o S 6 0 S lll 8 11 2 S c 8 o a a 5 5 2 J 8 5 5 g 2 2 lifl pi fS pi s s L 6 j 5 b J 2 1 8 8 I iljllli 8 5 2 5 I 8 g o i 1 lllill S I j a 2 s S 2 I 22c ...

Page 32: ...CAPACITOR COLOR COOES RESISTOR COLOR CODES ...

Page 33: ... zation is provided in both channels for the tope speed selected with the TAPE switch on the front panel One position Is for 7 1 2 Ips tapes and the other for 3 3 4 ips tq es These equalizations are the industry standard for pre recorded stereophonic and monophonic topes The remainder of the procedure is the same os Listening to Phonograph described obove listening TO AMONOPHONIC source CONNECT ED...

Page 34: ...rator In addition use a precision iOO I attenuator to permit obtaining a level of 0 004 volt fed Into MAG PHONO from on audio generotoroutpu t of 0 4 volts which con easily be measured on the lowest AC volts range of your VTVM also improves signal to hum from generator Use Q high Input Impedance VTVM for all AC signal vol tage measurements a VTVM or 20 OOOfVv VOM for DC volts measurements If the t...

Page 35: ...s both at LOUDNESS switch to OUT BASS 1 2 aid TREBLE 2controls oil otO NotethotattheMONOPHONIC PHONO A L frw that at the other positions of the MOD wIteh due to loues in the mixing network Inserted at this itlon This accountsfbrthe o iparantsensitivity In the chartof 004v 4t w In at l kcfor3vout dthe PHONO position instead of 0015 5tnv for 3v out on phono that een be expected at the other MODE ons...

Page 36: ...r Replace DC voltage at V6 cathode pin 7 is incorrect as specified below a No voltage Defective V6 C27A shorted intemaliy or externally Open R58 Connection to center tap of high voltage winding of Tl is open Replace Replace or repair Replace Repair b Low voltage C27A O K bot C27B or C shorted C27 open or rto connection Excessive current drain in amplifier Replace Replace or repair Repair e High vo...

Page 37: ... 7 8 9 10 SECTION AMPL 1 AMPL 2 NORMAL REVERSE TUNER AUX PHONO A 8 9 8 9 8 9 8 9 8 9 NC B 2 3 4 10 7 9 7 9 2 3 4 9 10 7 2 3 2 3 4 7 3 4 7 9 NC P r c l p o Po l lon AUXA d CH CHECK o o ECC83 12 7 ECC03 I2 006 CCCeS l2AX7 ECCS3 12AX7 01 0 0 St sSa r r 5 prsamf TAreouT M r TrI ST ...

Page 38: ...50 219 20 53 ro 48Ka 1 3W a1D bluo gray aratga rilvar 3 221 22 rti 2 2Mfl I 2W 4I0 rad d gracn llyaf 2 225 24 per dual 5 MKa and 50K I I 227 28 roi aaOKa 1 2W 10 orange eron9a yallow llvaf 2 231 32 59 rai 220Ka 1 2W 10 rad rad yallew ll af 3 237 38 rat 33Kfl 1 2W 10 a iga aranga eranga Ilvaf 2 239 40 47 48 rai 470Ka 1 2W 10 allcw y alal yallew ll ar 4 243 44 pat dual IMO llnaor I 245 44 pat dual 5...

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