Nikko NT-850 User manual

AM / FM STEREO TUNER
NT-SSC
.. _.. ...,
1111
TYPE AND VOLTAGE
W-TVPE
120V AC
UL and CSA type
E ·TYPE
NK standard type
2201240V AC
N-TYPE
DEMKO and SEMKO type
NIKKO
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II
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9® 11
NIKKO
NT-B!!IO
8
1
'/
a0
...
2
o
(W- TYPE)
(W- TYPE)
1. POWER SWITCH
2. OUTPUT LEVEL CONTROL
3. IF BAND SWITCH
4. HI-BLEND SWITCH
5. MUL TlPATH SWITCH
6. MUTING SWITCH
7. TUNING KNOB
8. SELECTOR SWITCH
9. TUNING METER
10. SIGNAL STRENGTH METER
11. STEREO INDICATOR
12. ANTENNA TERMINALS
13. AM LOQPSTICK ANTENNA
14. DE-EMPHASIS SWITCH
15. MULTIPATH TERMINALS
(OSCilLOSCOPE JACKS)
16. OUTPUT TERMINALS
17. AC POWER SUPPLY CORD
III
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..8thrul1
.. ..... 11
12 thru 16
IV
1.
2.
3.
4.
5.
6.
7.
8.
9.
CONTENTS
SPECiFiCATIONS ,
DISASSEMBLY
.................•........ , .....•.•.... , •..... " , •......... 2
SCHEMATIC
DIAGRAM 3,4
TUNER CIRCUIT BOARD (BOTTOM VIEWI 5,6
PARTS LOCATION , , .....•......••...... , •................. 7
PARTS LIST ....................•.....•.•....••.•... , •.......•..
DIAL CORD INSTALLATION ..........•.......•...... , •...... , •..
ALIGNMENT .....................•.. " •.. , ....•......•.•.... , •....
SEMICONDUCTOR DATA
TRANSISTORS . ................•................•............................... 17
FIELD EFFECT TRANSISTORS ..........•........•.... . .............•.......... ,7
DIODES, LEOS . ................•......•........................•.....•••........ '7
ZENER DIODES ...........•....•.•....•.•••...•••.....•.••...••••....•.•........ 17
INTEGRATED CiRCUiTS 18, 19
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SPECIFICATIONS
NOM. LIMIT NOM.
LIMIT
UNIT (NOR.) (NOR.) (NARROW) (NARROW)
FM
TUNER SECTION
Usable Sensitivity ...... ............... dBf (pV) ... 9.31 (1.6) .... 15.3 (3.2) ... 9.31 (1.6) ·
... 15.3 (3.2)
50 dB Quieting Sensitivity ...............
dBf (pV) ...
11.2 (2.0) . ... 20.2 15.6) ... 11.212.0) ·
... 20.2 (5.6)
Hum and Noise MONO
dB@65dBf. 70 65 70 65
STEREO.
dB@65dBf.
70 65 70 ·.65
T. H. Distonion MONO
".
0.08 .0.3 0.1
·.. 0.5
STEREO(L"'-R)
".
0.12 0.3 0.2.
·.0.5
Capture Ratio .dB l.5 ........•..... 3 2 ......••....... 4
Alternate Channel Selectivity ........•.... dB 60 .....•........ 50 80 .....••....... 70
Spurious
Response Ratio dB 100 80 100 ....••....... 80
Image
Response Ratio (98 MHz)
AM Suppression Ratio .
85
70 85 .....•........ 70
60 ....••.••..... 40 65 ....•••....... 40
IF Response Ratio (98 MHz)
dB
...
dB
dB .....
80 .....•..•..... 70 ... 80 ·
..••....... 70
(1 kHz) STEREO dB 55 ....••........ 40 45
Separation (100 Hz) STEREO dB 45 ....•......... 35 ... 35 ·
..•........ 25
·
..••.•..... 30
(10 kHz) STEREO dB 40 ....• ,30 30 .....•........ 20
MHz
87.4-109 .. 87.9-108.5 87.4-109
STEREO dB 22 22 ±5 .
FM Receiving Frequency
....•..•.....
Volts . . . .. 10.8 . .. 1 ..
O.B
87.9-108.5
22 ±5
.. 50
4.5 ±0.5
22
65
4.5 .
........... 50 .
4.5 .4.5 ±0.3 ..
dB 65 STEREO. Subcarrier Product Ratio
Separation. Hi·Blend
(1 kHz)
Meter Sensitivity
@65dBf
Output Level
Antenna Impedance .......•......•..............
300 ohms balanced & 75 ohms coaxial
UNIT NOM.
LIMIT
AM TUNER SECTION
Usable Sensitivity Loopstick antenna . pV!m 300 ......••..••..••...•..••.•.•..... 1000
Signal·to·Noise Ratio dB
45 ............•.......•......•........ 35
Image Rejection (1000 kHz) dB .75 .....•......••..••.••.•••.•••.•..... 60
IF Rejection
IHF Selectivity
(1000 kHz)
(t 10 kHz)
........•.... dB
dB .
60 .....•......••......•......••....... 40
40
.............•......•............... ~
AM Receiving Frequency kHz-kHz .. 520 -1650 .......•......•........ 525 -1635
Output Level mV 400 ............•.......•........ 400 ±3dB
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DISASSEMBLY
Note: Three digit numbers circled in this chapter ( 0) are
represented by a ( *)in the parts listing.
Cabinet Cover Removal
Remove seven tapping screws from
the top and both sides
of the metal cover as shown in Photo 1.
Bottom Plate Removal
Remove eight tapping screws from the bottom of the unit
and lift away.
Front Panel Removal
1. Using hexagonal wrench, remove TUNING knob
from the front of the unit.
Photo 1
2. Remove SELECTOR knob and OUTPUT LEVEL
knob from the front of the unit by pulling them
forward.
3. Remove two nuts (1, 2) (Photo 2).
Remove two tapping screws (1,2) (Photo 3).
4.
•
Lift front panel away from the unit.
To reassemble, reverse the procedure. )
000 ~
"---i---i
Meters Removal
1. Disconnect cables to meters.
Lamps Removal
1. Pull lamps out from the bottom of the REFLEX PLT
(light guide acrylic resin plate).
Power Transformer Removal
1. Disconnect all the power transformer cables.
2. Remove two tapping screws (3, 4) (photo 3).
3. Lift the power transformer up and out of chassis.
To reassemble, reverse the procedure.
Photo 3
Photo 2
Remove
two tapping screws (5,6) (Photo 3).
Remove the meters
by lifting the meter bracket up
and
out of the front plate.
To reassemble, reverse the procedure.
To reassemble, reverse the procedure.
•
•
2.
3.
2
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SCHEMATIC DIAGRAM
S-"ETE
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POWER
FM DE_EMPHASIS
6ANO
MUTING
MULTIPATH
HI-BLEND
SELECTOR
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"'OHS, UNL~SSOTH~AWISE SPECIFIEO;
I. RESISTANCE VA,AUES ARE ('I O .... S,
K· 1,000. "·',000,000
2CAPACITANCE VALUES 1 0 AND ABOVE
ARE IN of OR pF IP· of, '" ·~FI. LESS
THAN 1.0 ARE IN ~f
ELECTAOl Hie CAPACITANCE VALUES
ARE IN uf/WV 1M· ~FI
J. I ,INDICATES VOLTAGES MEASUREO
WITH NO SIGNAL APPLIED.
CIRCUIT
AND SPECI~ICATIONS ARE sue
JECT TO CHANGE WITHOUT NOTICE_
34
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CER"M,e CAPACITOR
POLYESTER
FILM CAPACITOR
f'Ol YSTVRENE nu .. CAPACITOR
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9" 301
" 32'
C313 "319
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4
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SCHEMATIC DIAGRAM
P'OlYSTYRENE "'LM CAPACITOR
3
f!OHS UNL~SSOTH~AWIS~ SPECIFI~O,
IRESISTANce VARUES ARE , .. DH'15.
K-UlOO, 1.1-1.000,000
lCAPACITANCE VAlUES 1.0 AND ABOVE
ARE
IN of OR uP IP, pf, M 'uFI, LESS
THAN Ia ARE IN uP
HECTAOl Hie C....... CIT ....... CE VAlliES
ARE IN uF/WV 1M· uFI
J. I I ,NDICATESVOLTAGES MEA5UAEO
WITH NO SIGNAL .....PLIEO
CIRC\lIT AND SPECIFICATIONS ARE sua
JECTTO CHANGE WITHOUT "OTleL
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POWER
FM DE_EMPHAS'S
BAND
MUTING
MUlTWA,TH
HI·BlEND
SELECTOR L4
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© CERA""CCAPACIIOR
@POL veSTER FilM CAPACITOR
®
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TUNER CIRCUIT BOARD (BOTTOM VIEW) (W-TYPE)
:
bb
0001 Jl
•..
u
>ailING MUl Tll'ATH lll-kL/ID I~ _
SWlTCfl SWlTOl SWlreM _TeM
5
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TUNER CIRCUIT BOARD (BOTTOM VIEW) (W-TYPE)
r ....
SELECTCIll
SWITCH
,1
IoIlJTl~O MUL TlPATH HI-Bl[ND If UNO
SwITC" SWITCH SW,TCH ''O',TCH
5
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PARTS LOCATION
'OJ
. "" '" ..
.-...,::
I
Photo 4
Photo 6
•
..'
226 259
Photo 7
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PARTS LIST
The KEY NUMBER I , I m"ked with. I *l on p.n, Iii! .. I ... to
numbefOol th, .. d'giu with. ( 0)· (Photo 1 - 81
Numbe,.l, in Iii. indic.t. the Qu.nlhy of. pOrts uWI in one tvP<.
M·CAP,
S-CAP:
T-CAP:
8p·CAp:
poIv .. '" film c._itor
PoIV"V"'" IiIm eo_i,or
Ton,.l~m ol..,,,oIVlio oa_i,or
Bip<>af oi..,trolVtic c._it",
3 ..... TR:
FET:
"
VR:
POT:
RES:
MORES,
CEMRES
NF:
e·CAp
E-CAP;
T,on,i"",
Field eff"", lron""o<
Int.~ .. tod ei'OJil
Volume con"ol (Vorl.bl. , .. ,,'orl
PoteM;""""" ISomili,od .. "obi. , .. i""")
C.,bon tilm ti<ed ''''stor
Mel., o.i ... film fixe<! "I"'",
Cemented wirewoond fixed , .. i"",
Nonll,"'obl,
Celomic capac;to,
Aluminium ol.."r"ly,;c <.pac;,,,,
E-CAP. T-CAP 000 Bp_CAp .. I .... 11 •10 uFI.,. in 111 ~F. 1101 V_
4. A ... mblie. on<! pa,,, Of •• ubj.." to cholll. without notiu.
5. Paf" Ofdefin<;! prooodu,.,
Incl~de in onv o,<!o,
o. 1'0'1 numbe"
b. Pa,t dffi:fiplion
c. Model n~mbe"
IAnv of tho oboYelockin<;l hom on o,d., mov deloV mipment of thO! orde,.)
CA61NET ASSEMBLY
*101
'"
PNl NT-850 _ff"'" p.".1
7883610
*102
'"
OlAl WINDOW GLASS 7802210
*103
mBUTTON GUIDE
(21
7401210
.,~
'"
BUTTON GUIDE 12B
N_
'"
mPTS
3¢. 6 - SC'ow
814306S
H.
m SN9<I>-n~t
892249S
'" m
w9¢- WOmOf
8931D9S
.. "
'"
",NOB R15Gl_32 (,~ningl
1841060
.. "
'"
KNOB R15Gl_19D (o~tpytle.eil
7851540
*110
'"
KNOB RI5Gl-220 I,"ec,orl
7B51610
0111
".
PUSHBUnON (IF bond, hi·blond,
m~ltiPO,h, m~ling) 1851560
*112
'"
PUSHBUTTON M12·335O (po,..';
7B50620
*113
'"
COV _metol C<>'lor 1820710
'" mpTS
3¢. 6 BlK _ SCfew
814306'11
'"
."
TFTS4\>. 10 8lK _ SCfOW 887410'11
'" ."
'1144> BlK_w"M'
893104'11
'"
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BTM Pl T - bottom pl.le 7324630
n.
...
PTS 34>.6 -!C'ow 814312'5
n,
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FOOT 234>.12
7401080
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PTS34>.12-!Crow
814300S
PACKING MATERIALS &ACCESSORIES
CHASSIS ASSEM8l Y
TYPE'
'"
SYMBOL
Hi
PART
DESCRIPTION"
" " j;;:f "
""
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FRONT ANGLE
7226220
""
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pTS 3¢. 6 - screw B14306S
"'"
IBACK PLATE ASSEM8l YI
'"
'"
1'15 3¢. 6 _ <O,.w 814306S
ITUNER CIRCUIT BOARD)
""
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pTS 3<>.8 - SCfew B\4306S
."',
'"
EARTH lUG 41' 4400080
"'.
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TWII)3¢_wosh ..
893403U
""
'"
TUNER PC8 HOLDER 7031140
".
mPTS
34>.6 _.Cfew
8143065
'"
m pMS 3<>.6 - SCfOW 810306S
'" mSPACER 765 1152210
*213.
, ..
PUSHBUTTON SWITCH SOG TV·3 (POW .. I 4040800
213b
."
PUSHBUTTON SWITCH SOG 21' TV·3IPOweri
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mPMS3<>.
6_.crew
8103065
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, ..
C·CAPO.0047uF AC12SV 239472C
,,~
C·CAPO.0047uF AC250V 239472E
*216
R2_R3
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VR V16l4G3N25KC IOKotlm. 2
4320730
*211
'"
DIAL SHAFT &FLYWHEEL 1152320
".
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SN9¢- nut 892249S
".
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TW (!l9¢ - w .. h .. 893409S
,'"
'"
W9¢ _w •• h.,
893109S
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".
PUllEY 9¢ 7400700
no
".
PUllEY SHAFT 4l
1120980
no
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PUllEY BRAC"'ET (AI 7031580
no
'"
PUllEY BRACKET (01 7031590
n,
".
pMS 3¢. 6 _ SCf.'"
814300S
*226
'"
DIAL OlUM 50\> 7401020
no
'"
SPRING IJI 7440290
*228
'"
DIAL CORD
.~'"
no
'"
NEEDLE -di.1 p<>nl0' 1860540
''''
'"
SIDE PLATE (l)
7226190
'"
'"
SIDE PLATE IR) 7226200
m
".
PTS 3¢ •6 - SCf.W
B14300S
*233
'"
DIAL SCALE
1883630
'" mPTS
31:> _6 _ "'row
814300S
'"
'"
BLIND PLATE
1280290
'" '"
METER HOLD PLATE 7226210
'"
'"
METER PANEL 7883640
n.
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DIAL BLIND III (ABS , .. i~)
7401290
'"
'"
DIAL BLIND IR) lA8S ( .. i~)
1401300
".
...
PTS 34>.6 - SC,"",
814306S
'"
... PTS 3¢ _8 - scrow BI430BS
*242
'"
METER C-85C h~mng) 4581960
'243
'"
METER C·85C 1';91'011 4581970
*244
'"
METER BRACKET
1031170
'"
mPTS
31:>_ 6 _ "'f.W
814300S
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METER REFLEX PLATE 7031240
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m
pMS34>.12_""0,,,
8103125
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m IN 34> - ~ut 892013S
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TW 31:>- wom~,
893404U
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REFLEX PlT locrvlic ro.in)_
light lI'Jide plale 7B7(l330
'"
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lAMP BV 0_31'0 300mm
5808120
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LAMP 8V 0.3A 200mm 5/108140
PART
'0.
7226170
7226180
9825240
91341)640
9640550
., .. ,'"
960186E
960213F
960198K
961004A
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9600010
4581360
962003C
962003E
DESCRIPTION"
CARTON BOX
STYROL PAD
POll SACK - (pol~.thyl."" clothl
POll SACK 113 _lp04yethyle". clothl
INSTRUCTION MANUAL e
INSTRUCTION MANUAL F
INSTRUCTION
MANUAL K
WARRANTY CARD IN)
POLISHING CLOTH
SILICA GEL - dfvef
a_MATCH ANTIEX) - FM .nt.nn.
PIN PLUG CORD RED
PIN PLUG CORD
YEl
SIDE ANGLE (l)
SIDE ANGLE (RI
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TYPE'
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SVMBOL
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PART ORDERING PROCEDURE ..•
. ,ndudit in ony ........:
~ Patt numbo<.
••
Pat'dn<;,iPl",n. 0Model numbo<.
CI<nv of ,t. _lacking from on .... cIt< moy cloIov "'_' of ,h., o<dt'.1
TYPE' TYPE'
'"
SYMBOL mPART
'"
SYMBOL
Hi
.m
DE$CR'PTION- DE$CR'PTlQN-
NO. NO.
NO. NO NO
NO.
~"'i
i:;;
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lAMP 8V O.v. :zoo...m
""' .. ,TUNER CIRCUIT BOARD
'"
", PT$ 3f. 12_1CftW 814312$
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", I'MS 3f. 12 - .,.ow
810312$
."
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FM FRONT END FB621U
4110010
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... TW]f-._
."."',
.""
n
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BALUN COIL lSI 1210420
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", IN3f_nut 8920135
.""
,,-~
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TETRA PVSH SWSUE42 (IF -. ""'t"",
{LEO CIRCUIT BOARDI <nUI"poth.
"'obI .....1_ ~ I>UOhbun ...
,~
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Pl/SHRIVET3.3.5
7401110
... "do ......
., ...
, ..
POWER TRANSFORMER T·1-275 llOV 1102750
...
,
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STl,IOSCREW 71(11)00
"'"
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POWER TR .... NSFORMER T·I·279 230V 1102710
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"", RDTRY
$W SRZ·VOI bel""" .... 1 - .QtIOlV
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", P.T. STOP PLATE "'".,
.wndl 81>. 3POt 405S01'O
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", PMS"x 15_OC'OW 8'0415$
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, ..
T·LUG 2L"'P
442241W
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.. ,T'LUG 2L·$P
44225IW
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,. ,
PMS 3f x10 _OC'.w ,'03,OS
IFM I·F SECTION1
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IN 3f -nul
892013S
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,. ,
TW 01 3f _ 1'1"".'
893404U
ClDl
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C·C .... P 0.022uF
BO. -20'4 SOV
"
2312232
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RES 2.2Mohm \0% Y,W 3252251<
CI02
", C·CAP
0.022uF BO. -20% SOV
"
2312232
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", C·CAP O.022uF
BO. -20% SOV
"
2312232
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", C·CAP O.022uF
BO. -20'4 SOV
'C
2312232
,,'"
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C.CAP O.022uF
BO. -ZOllo SOV
'C
2312232
"00
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CCAP 0.022uF
BO. -2O'Jl. SOV
'C
2312232
Cl07
0U'01 ....
BAC'" PLATE ASSEMBLY "
..
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C.C .... PO.022uF
110. -ZOllo SOV
'C
2312232
" ..
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C.CAP 0.022uF 110. _2O'Jl. SOV
'C
2312232
CIlO
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C.CAP O.022uF 110. ~2O'Jl. SOV
'C
2312232
"""
, ..
lAC'" PLATE ASSl::MBLY Wu
9512710
CllI
OU'of ....
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lAC'" PLATE ASSEMBLY Eu ",,..
Cll2
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110. -20'% 50V
'C
2312232
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9512810
CIl3
"c.CAP O.022uF
110. -2Ollo 50V
'C
2312232
Cll4
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110. -20'% SOY
'C
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110. ~2Ollo 50V
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BAC'" PLATE NT 8SOW
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CI17
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o.047uF
110. -20'% SOV
'C
2314732
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--, lAC'" P'U.TE NT-8SON
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BO. _20'% SOV
,C
2314732
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.... "
C119
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CCAP 0.047uF 110. ~2O'Jl. 50V
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2314732
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-" PLUG CORD CEE·2T
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E.cAP 18R47uF 21122SQ
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C121 "E-eAI'SOAO.47uF 211SOSO
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2113130
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SR"'N'"
,,-
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CCAP 33(IpF
10l' SOY SL
23233''''
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CORD SToPf'ER SR 6W., 7400740
C'24
"
CCAP O.022uF 110. -2Ollo SOY
'C
2312232
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110. -2Ollo SOY
'C
2312232
"".
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CORD BRAC"'ET (EHI
"'- ""
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25R4.1uF 2"3150
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CI27
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Ill. _2Oll. SOV
'c
2312232
.",
", US PIN TERMINAL
21'. 2 4440470
CllS OUIOI .....
""
...
PMS3fx8-oc,_ 810308S
om
", E·C
.... PSORO.47uF 21 \5050
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... IN3f-ny,
992013S
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BO. -20% SOY
"231223Z
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TW II) 3f- 1'1"""
993403U C131 Oy, of
y~
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E .... RTH TERMIN .... L 4581580
Cln Oy, of y~
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PMS~.6_"'rlw 8103065
Cl33
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C.CAP 0.041uF BO. _20% SOY
"
23\4732
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IN3f_
n
u'
11920'3S
,,~
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C.CAP 10pF
'K
SOV SL 232'001<
'"
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TWIII3f-w ........ 8$3403U
C135
0..101" ..
·314
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AM B .... RANT _ .... 1.1 I"""""e~ On'""""
''''''''
,,~
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E.(: .... P10R41uF
2111250
·315
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ANTENNA SToPPER
C137
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CCAP O.022uF
BO. -20'% SOV
"
23"23Z
".
'"
'MS",20-oc,_ 8104205
CllS
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CCAP O.041yF Ill. -2O'lo SOY
"
23'4132
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IN4._"", 892014S
""
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CCAP 0.041yF
BO. _~ SOY
"
23'413Z
".
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TW 411 .. _ wahef
"""'"
C140
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C.(:AP O.041yF
BO.-~5OV
"
23'413Z
·319
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ANTENNA SUPPORTER C141
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CCAPo.041yF 8O._~SOY
"
23'4732
.".
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ANTENNA BLAC"'O III
"""' ..
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n-S3f.8_oc ... 8l4308S
CF102
·m
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CORD STOPP'ER SR-3P'"
""''''''
-CFIOS
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CERAMIC FILTER "'MFC97 M"
.. "
'm
'"
ANTENNA TERMINAL
.. """
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'"
P"IS 3f xII -"",ow
"""'"
"'"
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DIODE V01212
"'.""
.",
,SLIDE SWITCH
$l·13 (FM ~l
.. ,.. ..
" ..
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OIOOE VOl212
.... ,,,
no ,
PMS3fxll-.,_
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!CIOI
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ICHA1l211
,,-
1I01
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"'"
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INDUCTOR lSuH W1210850
,,~
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INDUCTOR 2.2uH 2Ollo 1210840
LEO CIRCUIT 80ARD
0101
'"
'"
2SC161511, MI
,,-
OlD2
'"
'"
2SC1815 ll, MI 5150825
.. ,
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LEO PC8
Q''''
'"
'"
2$C1615 IL. 1.11
5150825
·402
'''''
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LEO TlR1Q9
"""''''
,,~
'"
'"
2SCl61Sl1, MI 5150825
.'"
,
'"
LED SPACER 7103100
9
www.hifiengine.com

10
P... RT ORDERING PROCEDURE
···Irod .... "'..,., ..... ~ P .. I......- .
••
P .. I ....... -"
_number.
lo'ny 01 me _1Id:. ... tr""'.., ..... ""'y ~ ""_I 01 _ ...... 1
,"'.
TYP"E"
'"
SYMBOL mP...
RT
'"
SYMBOL
",
PART
DESCRIPTtOH" DESCRIPTION
••
'o.
...
.... ....
...
H,
... .
~ .. Z
,.,
0'"
'"
"
2SC9oIS <0 lP. OJ
SI!i077$ C210
0..'01 ....
0'"
'"
"2SC94S ©
IP. 01 SI!i077S
C211
'"
E·CAP 2SA3.3uF
2113130
0107
'"
"2SC167S
IL. "II S1S082S
""
'"
M·CAPO.0047~F
"'"
."
222~72K
0108
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"2SC94S
~ IP. 01 51!i077S C213
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M·CAPO.OluF
""
."
222103K
0'"
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"2SC945
IP. 01 51!'>077S C214
'"
E·CAP !iOAO.47~F
211!i050
C21S
'"
E·CAP !iOAO,47~F
211!iOOO
Al0l
'"
RESHoI>m
'"
..
328470J C216
'"
C-CAP O.OI~F
100. -0%
"'"
"231103Z Rl02
'"
RES 560 ohm
'"
,.
328561J C211
'"
C·CAP 68pF
10% !iOV SL
232680K
"m
'"
RES 3.9 Kohm Sll. lIoW
328392J
"'"
'" RES IKollm 5ll.
lIoW
328102J CF201
'"
CERAMIC fiLTER SFZ455A 1280310
""
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RES 3JO oIlm
'" ,.
32833IJ
",.
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RES 47 ohm
'" ,.
".,,'"
0""
'"
DIOOE 152076 !iOl019S
Rl07
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RES 560 ohm
'" ,.
32856IJ
0""
'"
DIOOE INIO
""""'''
",.
'"
RES 4.1 Kohm
'" ,.
3~7U
",.,
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DIOOE 1"'60
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" ..
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RES 470 ohm
'" ,.
328471J
RHO
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RES 330 ohm
'" ,.
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0""
'"
2SC16751L. IllI
"'0'"
Rill
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RESS_6 Kohm
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328562J
0,..
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TR 2SC9oI$ <0 CP. a) $I!i077S
R1I2
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AES 5.6 Kohm
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RI1J
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SR19R 8470 ohm -1>0, ..... _ ..
..... ,
""
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RES 68 K""""
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,.
"""" Rl14
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RES 820oI>m
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:n6821J
,,..
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RES 12K""""
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,.
328123J
R115
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RES 1Kohm 5ll.
lIoW 328102J
"'"
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AES 1Kohm
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,.
328102J
A116
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RES68Kohm 5ll. 1IoW 328683J '''''
'"
RES l000hm
'"
,.
328101J
A117
'" RES 18 Kohm 5ll.
1IoW
328183J
"""
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RES 220 ohm "
,.
328221J
R118
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RES22 Kohm 5ll. %1'1'
328223J ",. Out 0' "Ie
Rlla
'"
RES 100 ohm 5ll. %1'1'
328101J R207
'"
RES l!iO Kohm
'"
,.
328154J
"'"
'"
AESS.6 Kohm 5ll.
:OW
328562J
,"'.
'"
RES 47 Kohm
'"
,.
328473J
R121
'"
RES5.6Kohm 5ll. %W 328562J
''''' '"
RES 68 Kohm
'"
,. 328683J
R122
'"
RES 56 Kohm 5ll. %1'1' 328563J A210
'"
RES 39 K""'"
'"
.. 328393J
""
'"
RES 5.6 Kohm 5ll. IIW 328562J
R211
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RES 33 Kohm
'"
,.
328333J
R124
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RES 10 Kohm
'" ,.
328103J
A212
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RES I K""'"
'"
,.
328102J
""
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RES 5.6 K""'"
'" ,.
328562J
R213 Oul o. USIl
""
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RES 1.8Kohm
'" ,.
328182J
A21~
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RES 5.6 K""'"
'"
,.
328562J
R127
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RES 150 ohm
'" ,.
3281$IJ
R215
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RES 100 Kohm 5'Ao
,.
328104J
""
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RES 10 Ko/vn
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328103J
R216
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RES 10Ko/vn
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,. "''''''
""
Oulol_
R211
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R ES ~ 1'0 o/vn
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,.
328411J
"'"
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RES22Kohm
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,.
".", ..
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RES 5.6 Ko/vn
'"
,.
""""
R131
'"
RES 2.2 Ko/vn
'"
,.
,"".
R21~
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RES ~.7 Kohm
'"
,.
3184nJ
""
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RES 10 Kohm 5ll. %W 328103J
""
'"
HYR KV$f l.o.7SNF 8SO Kohm_
"'"
'"
AIll OSC COil REO
,,-
pot .... " ...... , ..
.""" ..
.,..
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AM I·F TRAHSFOR"IER 1280160
""
Qu, ot~ ..
.""
'"
AM DET COIL _ AM d1lCrmorYl ...
R135
'"
AES 100 Kohm
'"
,.
328104J "
.... , .........
,,,,,,,.,
""
'"
AES3.3Kohm
'"
,.
328332J
R137
'"
AES 5.6 Kohm
'"
,.
328562J
A138
'"
RES 15 Kohm
'"
..
328153J
R139
'"
AES 2.2 Kollm
'"
,.
328222J
(MPX SECTION)
Al~O
'"
AES 3.9 Kohm
'"
,.
328392J
Al~1
'"
RES ISO ohm
'"
,.
3281S1J '''''
'"
E·CAP 2SR3.3~F 2113130
R142 Out
0''''''
"'"
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E-CAP 16Rl00uF
2112300
A143
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RES 1Kollm
'"
,. 328102J
"'"
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T -CAP 3SOO.22\1F 2S2402"1
""
'"
RES 68 Kohm
'" ,.
""""
"'"
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T -CAP 2503.3uF 252313"1
AI4S
'"
RES 68 Kohm
'" ,.
'''''''' "'"
'"
T-CAP 2S01.SuF 252311"1
" ..
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RES 611 Kohm
'" ,.
''''''''
""
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E-CAP 16Rlo..F 2112'200
"'"
'"
E·CAP 16R10uf 2112200
TlOl
'"
fill I·F TRANSfORMER 1240180
"""
'"
$-CAP ~1OpF 5'll. SOY 223471Y
""
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flol DEl (I) SHYI719 SlOG PINK -
"'" '"
CCA.I' SIOp1' 5'll. SOY SL 232S1lJ
Fill disa""","10< " ........ tNt
".,,'"
" ..
, ..
1Iol--CAPQ.0012\1f 5'Ao SOY ml22J
"'"
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fM DEl I2l SNYI720S1OG BlUE_
""
, ..
M-CAPQ.OOI2uF 5'll. SOY
222122J
FIoI disa ..... rYlO< " ... ,.........
,~"'"
""
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CCAP SIOpF 5'll. SOY Sl 23251lJ
"'" '"
E-CAI'I11A10uf
2112200
""
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E-eAP 16Rlo..f 2112200
"'" '"
M·CAPQ.Ol!i<>F Sll. SOY 222153J
CAM SECTION)
"'"
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M-CAPO.Ol!i<>F Sll. SOY 2221511
""
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T·CAP 3S00,47~f
2S2405111
C201
'"
C·CAP 18pF 10% SOY SL 232180K "'"
'"
T·CAP 3S00.47uf 2S2405M
'''''
'"
C-CAP 0.047uF 90. _20%
"'"
,.
231473Z
"'"
'"
E·CAP 25R3.3~F 2113130
0"
'"
C·CAP 0.022\1F 90.
-20%
"'"
,.
231223:1;
"'"
'"
E·CAP 25Fl3.3~F 211313Q
'''''
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E·CAP!'>OR l~f
2115100
C321
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M·CAPO.0041~F 10%
"'"
2224721<
OM'
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CCAP O.OI~F 100. -O'll.
"'"
2311roZ
""
Qu, of .....
"'"
'"
5-CAP 36OI>F
'"
223361Y
""
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E-CAP 25R4.1~f 2113150
"'"
'"
CCAP O.022uf 80. -2O'll.SOY
,.
2312232
,,~
0U'0I ....
"'"
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E-cAP 16R33uF 211223Q
""
Ou,oI ....
"'"
'"
E-eAP SOR1~F 2115100
""
'"
M-CAPD.047~F
"" "'"
22247JlC
www.hifiengine.com

PART ORDERING PAOCEDURE· 1""ludo in ony 0<<10" A_ Pm numbe<. B. Port <Io""ipti"". C_ Modol numOO'.
IAny of 'he ~bov. locking from on o'c/o' m~y <fol~v .hipment 01 'hot o<do'.)
TYPE-
'"
SYMBOL HI PART
DESCRIPTION~
"
'0.
,»
'0.
j'::;;;:
0301
'" DIODE
lS2076 50101%
0302
'"
DIODE lS2076
501019$
"'"'
'"
ZENER DIODE AD5_6EB 5020425
0""
'"
DIODE lS2076 501019S
IC301
'"
ICliA1196 510043S
0301
'"
'" "CO" ~ 1'. 01
5150775
0302
'"
TA 2SC945 (1'.01 5150775
0'"'
'"
TA 25C945 (I'. 01 5150775
"'''
'"
TA 2SC945 (1',01 515077$
R301
'"
'"
47 ohm .-
,W
328470J
R302
'" '"
10 Kohm
.-
'W
328103J
A303
'" '"
5.6 Kohm .-
,W
328562J
""
'"
'"
100 Kohm 5%
,W
32BI04J
R305
'"
'"
1.8 Kohm .-
,W
328182J
"'"
'"
'"
5_6 Kohm
.-
,W
328562J
"'I'
'"
'"
lKoI1m .-
'W
328102J
R308
'"
""
18 Kohm
.-
'W
328183J
''''
'"
AES 100 Kohm 5% %W 328104J
R310
'"
SR19R Bl0 Kohm ~ potentiometor 4300510
R311
'"
RES 6900hm S% 'l.W 328681J
R312
'"
RES 27 Kohm
5% %W
328273J
R313
'"
RES 27 Kohm S% %W 328273J
R314
'"
AES 6_8 Kohm 5% %W 32S6B2J
R315
'"
RES 6.8 KOOm 5% %W 328682J
R316 ,, RES 47 Kohm 5% %W 328473.J
R317 ,,
RES 47 Kohm
5% '4W
328473.J
R318 ,, RES 330 ohm 5% '4W 328331.J
A319 ,, RES 330 ohm 5% '4W 328331.J
R320 ,,
RES 3,3 Kohm
5% YOW 328332J
R321 ,,
RES 3.3 Kohm 5% '4W 328332J
R322 ,,
RES 10 Kohm
5% YOW
328103J
'm
,,
RES 10 Kohm
5% \;W 328103J
R324 ,,
RES 4.7 Kohm 5% \;W 328472J
An5
,,
RES 4.7 Kohm 5% \;W 328472j
R326 ,, RES 220 Kohm 5% \;W 328224J
R327 ,,
RES 220 Kohm 5% \;W 328224J
R328 ,,
RES 47 KOOm 5% \;W 328473J
""
'"
RES 47 Kohm 5% \;W 328473.J
""
'"
RES 4.7 Kohm 5% 'I.W 328412.J
'D'
'"
RES 4,7Kohm
5% 'I.W 328472J
DIAL CORD INSTALLATION
1.5 TURNS
3TURNS
,',
, ,
,,
II'
DIAL SHAFT
DIAL POINTER Figure 1
TYPE-
'"
SYMBOL HI PAAT
DESCRIPTfON"
'o. 'o. ?~?
'o.
M
'D'
'"
RES 1,2 Kohm
5% l>W 328122J
""
'"
RES 1.2 Kohm 5% l>W 328122J
,,, ..
'"
HIIR KIISF HH5NF 850 Kohm-
POtentiomet.r
..,"'" ..
R335
'"
RES 330 ohm 5% l>W 328331J
R336
'"
HIIR KIISF HHSNF 8150 Kohm-
POl<ntiomotor
..,""'"
R337
'"
RES 3300hm
.-
'W
328331J
R338
'"
RES 6.8 Kohm .-
,W
328682J
R339
'"
Out of u~
,~O
'"
Out of u~
" .. ,
'"
RES 56 KOOm
.-
,W
328563J
,~,
'"
RES 47 Kohm .-
'W
32B473J
lREGURATOR SECTION1
COO,
'"
C·CAP O.OluFl00, -<l'Il. 50011 238103P
, .. ,
'"
E·CAP 25R2200uF 2123.420
, .. ,
'"
E·CAP 16Rl00uF 2112300
,~
'"
E-CAp 16Rl000uF 21 I 2400
, .. ,
'"
E·CAP 16Rl00uF 2112300
"'"
'"
E-CAP 35R22uF
21\4220
,"I'
'"
E·CAI' 35Rl00uF
2114300
"'"
'"
C·CAP 0.022uF 80, -20% 50V "2312232
"'"
'" E-CAP 35R10uF 2114200
C810
'"
C·CAP O,OluF 100. -<l'Il. 500V 2381031'
C8ll
'"
C·CAP O,OluF 100. -<l'Il. 50011
2381031'
"'"
'"
DIODE lSHlB5 560032S
0'"
'"
DIODE lS1885 560032S
"'"
'"
DIODE lS1885 5600nS
""
'"
ZENEA DIODE XZ137 502()J7S
0'"
'" '"
25023510) 5130565
"'I'
'"
'"
2SC1627 10. "5110175
, .. ,
'"
RES 820 ohm .-
'W
328821j
, .. ,
'"
M().RE5 220 ohm
'W
360221 F
, .. ,
'"
MO·RES 10 ohm
'W
360100F
,~
'"
RES 15 Kohm
'W
n8153J
"
>-
0
~
>-
"
'"
>- >- ::> I
"'
0
"'
'"
'"
'"
0
~
0
>-
~ Z
'"
w
U0
>-
~
Z
w0
0
"' >-
I ~
"'
'"
"'8
@~
"
>-
~
'"
~
1. Turn the FM front end shaft to the left until the rotor
of the variable capacitor is completely out of the
stator.
locate the deficit part on the dial drum in line
with the FM front end shaft on vertical as shown in
Figure 1.
2. String the dial drum and pulleys in the direction of
arrows. (In circled number ardeLl
3. Turn the FM front end shaft to the right until the rotor
of the variable capacitor is fully rotated in the stator.
Fix the dial
pointer to the string at areading of
87 MHz on the dial scale.
11
www.hifiengine.com

ALIGNMENT
Test Equipment
Allow a minimum of 10 minutes warm-up for test equipment and the tuner to be tested.
Maintain rated line voltage.
FM Stereo/Mono Signal Generator
Vacuum Tube Voltmeter (VTVM)
Oscilloscope
Distortion Meter
Frequency
Counter
AM Sweep Generator
FM Section Alignment
Connect test equipment as shown in Figure 2.
Connect FM Stereo/Mono signal generator through standard dummy antenna to FM antenna terminals of the tuner.
Connect VTVM, oscilloscope and
distortion meter to OUTPUT terminals of the tuner with shielded cable.
Note: Adjust FM signal generator output level so that the waveform on the oscilloscope is uniform.
V. T.V,M.
FM STEREO/MONO SIGNAL GENERATOR
:"."
• • OSCllLO
oil P..:: _ SCOPE
i.~ ,. _._ ••
••••
r--~~. - ._- ..
• •- •. _G._.
from
OUT
PUT
.,11I
........... _ ... /
SHIELDED CA8LE
r--~~¥t--l
,.
STANDARD DUMMY ANTENNA
•• • •
®.~~
.@ • • (iI
• • • •
Figure 2TEST EQUIPMENT DISTORTION METER
12
www.hifiengine.com

FM IF Alignment (Photo 8)
1. Set FM signal generator for 98 MHz.
2. Adjust the generator to ±75 kHz deviation at 1000 Hz.
J. Switch:
a. IF BAND to "NORMAL" position.
b. HI-BLEND
to "OFF" position.
c. MULTIPATH
to "OFF" position.
d. MUTING
to "OFF" position.
4. Tune the unit for outside of the FM bandwIdth, then adjust n02 until Ml (Center-of-the Channel Tuning Meter)
indicates mid-scale.
5. Tune the unit for 98 MHz modulated signal, then adjust nOJ for minimum distortion.
6. Tune
the unit for outside the FM bandwidth again. If Ml does not indicate mid-scale, repeat steps 4and 5.
7. Tune the unit for 98 MHz modulated signal, then adjust nOJ for minimum distortion.
Attenuate generator
output level until M2 (Signal·Strength Meter) indicates a"one (1)" meter reading.
8. Adjust
"IF" transformer located in FM front end (Red Core) until M2 indicates maximum deflection.
9. Attenuate generator
output for 60 dB. Adjust R1JJ until M2 indicates a "four and ahalf (4%)" meter reading.
10. Set
IF BAND switch to "NARROW" position.
11. Turn
Rl1J fully counterclockwise. Attenuate generator output level until M2 indicates a"one (1)" meter reading.
Adjust
nOl until M2 indicates maximum deflection.
12. Set
IF BAND switch to "NORMAL" position.
1
J. Attenuate generator output level until M2 indicates a"one (1 J" meter reading.
14. Set
IF BAND switch to "NARROW" position.
15. Adjust
Rl1J until M2 indicates a"one and ahalf (1¥.»" meter reading.
nOI R310 TP T204 T202 R334 R336
TCA AMI TeR,
1FT AM2 TeRz Teo RI13 T101 n02 R133 Tl03
Photo 8. TUNER CIRCUIT BOARD
13
www.hifiengine.com

14
FM Frequency Coverage and FM Tracking Alignment
These adjustments are factory preset and normally need no further adjustment.
However, if necessary proceed as follows:
1. Adjust FM signal generator to t75 kHz deviation at 1000 Hz.
2. Turn the tuning knob
fully counterclockwise. If the dial pointer is not located on 87 MHz position of the dial scale,
reset the dial pointer to this position.
STEP
GENERATOR DIAL ADJUSTMENT POINT OSCILLOSCOPE VTVM &M2
1 88 MHz 88 MHz LO (Photo
81
Maximum waveform Maximum deflection
2108 MHz 108 MHz TCO (Photo
81
Maximum waveform Maximum deflection
LA (Photo
81
388 MHz
88MHz
LR, (Photo 81
Maximum waveform Maximum deflection
LR, (Photo 8)
TCA (Photo 8}
4108 MHz 108 MHz TCRI(Photo 8} Maximum waveform Maximum deflection
TCR2(Photo 8)
3. Repeat adjustment
of steps 1and 2 two or three times.
4. Repeat adjustment
of steps 3and 4once or twice.
5. Repeat adjustment
of steps 1and 2once or twice.
FM MPX
and Stereo Separation Alignment (Photo 8)
1. Set FM signal generator for 108 MHz unmodulated signal.
2.
Set IF BAND switch to "NORMAL" position.
3. Connect frequency counter
to test point "TP".
4. Attenuate generator output for 60 dB.
5. Tune the unit for 108 MHz unmodulated signal, then adjust R310 for 76.2 to 76.5 kHz for correct VCO.
6. Adjust generator
to t67.5 kHz deviation at 1000 Hz and to t7.5 kHz deviation for 19 kHz pilot signal.
7. Tune the unit for 108 MHz modulated signal. then adjust R334 for maximum separation.
8.
Set IF BAND switch to "NARROW" position and adjust R336 for maximum separation.
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