Sansui TU-S77AMX User manual

www.SteamPoweredRadio.Com
I
I
DIGITAL SYNTHESIZER
TUNER
SANSUI
TU·S77AMX
------
--
----
1 -
••••••
' • •
-·
• - - - - .• 989 - ·- ,.
--
----------
--;.---·-
__
-
...
·-
·-
---·-
--
--
__
..
_"'
..
-.
-:-
-
-
-;-
;-
:;-
CAUTION
1. Parts identified by
the~symbol
on the schematic
diagram and the parts list are critical for safety.
Useonly replacement partsthat have critical charac-
teristics recommended by the manufacturer.
2.
Make leakage-current or resistance measurements
to
determine that exposed parts are acceptably in-
sulated from the supplycircuit before returningthe
appliance to the customer.
SANSUI ELECTRIC CO., LTD.
TU-S77AMX
•SPECI
Fl
CATIONS
FM
Section
Tuning range...................
88 to 108
MHz
Usable sensitivity
Mono
IHF .................. 10.8 dBf (1.9
µ.V
:
TlOO)
DIN ................. 0.
95
µ.V
50 dB quieting sensitivity
Mono
......................... 16
.2
dBf
Stereo ........................ 37.7 dBf
Signal
to
noise ratio at
85
dBf
Mono
..................
..
..... 90
dB
Stereo ........................ 84 dB
Distortion at
65
dBf
Mono
.........................
less
than 0.015% at 1,000 Hz
Stereo .....
....
...............
less
than 0.02% at 1,000 Hz
Alternate channel selectivity (at
400 kHz)
NARROW
..
................. 60 dB
Capture ratio ..................
1.0 dB
Image response ratio.......
100 dB
Spurious response ratio...
100 dB
Stereo separation ............
60 dB at 1,000
Hz
Frequency response
Stereo ........................ 20 to
15
,000 Hz
+0.2 dB, - 0.5 dB
Antenna input impedance
.....
..
...........................
300
ohms balanced
75
ohms unbalanced
AM
Section
Tuning range............
..
..... 530 to 1,600 kHz
Usable
se
nsitivity
Mono
......................... 48 dB/m
(251
µ.V
/m)
Signal to noise ratio at
80
dB/m
Mono
.........................
SO
dB
Image respon
se
ratio
....... 45 dB at 1,000 kHz
Others
Output
voltage and impedance
..................................
775
mV/2.2 kilohms
Power requirements ........
120V (60 Hz)
Power consumption ........
14W
Dimen
sions
.....................
430 mm (
16
-15/16•
)W
57
mm (2-1/4*)H
306 mm
(12-
1
/16*)0
Weight ............................
3.5 kg
(7
.7
lbs)
net
4.3 kg
(9
.5
lbs)
packed
• Design
and
specifiutionJ subject
to
change without notice for
im-
provemenls.

www.SteamPoweredRadio.Com
TU- S77AMX
1
CAUTION
1. The symbols, UL, CSA, SA, BS, UK , EU, AS and XX (EXPORT) on
the parts list and
the schematic diagram mean followings respectively.
UL....................... Manufactured for U.S.A market.
(Underwriters Laboratories approved rnodel.)
9SA .................... Manufactured for Canadian market.
SA....................... Manufactured for South African market.
BS, UK ............... Manufactured for United Kingdom marke
t.
EU ...................... Manufactured for European market.
AS....................... Manufactured for Australian market.
XX (EXPORT)
.. . .. Standard Version.
NON MARK
.... .... Common Parts.
2. Some printed circuit boards are not supplied as the assembled.
To separate these in this service manual, the stock No's are not in-
dicatedatthe ends
of the board names. However, the individual parts
on the circuit boards are provided by orders.
3. Since some
of capacitors and resistors are omitted from parts lists
in this service manual, refer
to the Common Parts List for capacitors
& resistors, which was issued on February 1983 .
4. Abbreviations in this service manual are as follows.
•Abbreviations List -
C.R. : Carbon Resistor
S.R. : Solid Resistor
Ce.A. : Cement Resistor
M.R. : Metal Film Resistor
F.R. : Fusing Resistor
N.1.R. : Non-Inflammable Resistor
A.R. : Array Resistor
C.C. : Ceramic Capacitor
C.T. : Ceramic Capacitor,
Temoerature Compensation
E.C. : Electrolytic Capacitor
E.L. : Low Leak Electrolytic
Capacitor
E.B. : Bi-Polar Electrolytic
Capacitor
E.B.L. : Low Leak Bi-Polar
Electrolytic Capacitor
Ta.C. : Tantalum Capacitor
F.C. : Film Capacitor
M.P. : Metalized Paper Capacitor
P.C. : Polystyrene Capacitor
G.C. : Gimmic Capacitor
A.C. : Array Capacitor
V.R. : Variable Resistor
S.V.R. : Semi Variable Resistor
SW. : Switch
Chip A. : Chip Resistor
Chip C. : Chip Capaci
tor
I
I

www.SteamPoweredRadio.Com
7~rr
300 □
~
"'
E
0 11
>
e
c'
0
CT
u
..
v'
,::
0
u
3
::;;
u.
V
~
.2I
<t
-
\,I
a:
Q,I
C,
,.,.,
~
o l
...
-
C
C:
0
~
u ,
+B ---o
(.)
~
0
u..
....I
u.. '
co
0:::
.
...
-'
,-
•
I IF Amp. I
!IF Amp .I
i IF Amp. Quadrolure DetectorI
FM F ronr- end
dlCI
-----,
r - ~(NAR ROW) l dlC2
u
"
<(
AM
Loop Antenno
[Prescoler
ILoop Fi lter I
IIC~ T C4OIIP
J 7µPCll63H 2
[J I I
➔ I
__ : dCF2 d;:_F_3_ ~
NARROWM f
t~-- d'i' ,-- dV R2 :
Ind. k~ -~ 1 I
C ) ;LD 10 : GAIN :
FM St re ngth
dO1
L6
FM+B-;jj
~ ~ L.OC AL
I nd .
s
LD II eVRi
S1 - 2
19 18
16
3 .
,c,
LAl245
+B~ I (WIDE~ __ J
- -- -
AM +B
AM Strength
Signal
, e
VR2
M ODE
0
s, -~
( Stop Signal )
+B
LOCKED
Ind .
s
LD1 3- 1a
~----- -----' IDECORDER I sFL,
MEM ORY
I Cl O Cl n MHz
I.U U U .O KHz
JUP 6 DownI
~6 ~6
,s1R,2
-
I TU NIN G I
0S2
dOe
STP2,1 DATA
AM IN
CKI
CK2
FM IN
MUTE
flC I
TC -9157 P
D0-1 STO
Do-2
Ml
\
AUTO
Ma
MA tfJAL
D own
Up AM FM
---e
I +B
+B
AM +B
•
slCI
TD63OIAP
FM
AM
>-
!~
i 7 7 7 Y Y 2 7 ~ 9 ~
t B sS4 - s511 sSJ
~
-
Mure
dVR3
d T2@
c:J
E
j13 I
IC 4
TC4O22
8 Counter 0 1v 1 de r
•
N

www.SteamPoweredRadio.Com
•
Composite
lnpui
)((
DB M : Double
Balanced
Mixer
* Swi tching Slgnol
•
W1
138KHz Square Waves)
I Bu ffer Amp.I
-
! Sub Detector I
r- --- - --- -, L- R
Beet
Conce l
+Pilot
R- L
+Pi lot
•
dVR l 02L
Wide
dVRI02RSeparation
Narr
ow
Seporot ion
L +RI Composi te J
8
-
IMatrix 8 Pi lot CancelI
'dVRI03R
Pilot
Cance I
I19KHz Phase Shifter ±45 ° I
*
AA
• W1
I9KHz 90•
w1 T T w1
IC II @ K: 1 2@ d l CI
2
IC II @ 1'1 IC
12 (]) 304KHz-
C
.9
-
V
Q,I
Vl
X
Q.
~
~
1,.1.,
N
I
,...
( Walsh Wove )
w1 =t52K(±)761<®38K
Logic Circuit
0 IC
II @ !Walsh Wove Gene rotor, etc )
N
?zt--- - ----- - ------- - ----- -~
21
IL.P.F 8 DC Amp I ISchmit! TriggerI
8
dlC9 61 I t - 1
4 19KHz
In- Phase
12 1 I I ~1
Detector
dLI03
ILoop FIit er l
s dlC10 sl I i .I
19KHz
4 Phase
12 1 I 1 _I
De te ctor I
19KHz Pilot Recover]
ST f\J'
MO
VCO (3BKHz X81]
;
~
0
0
dQ1 11
R- ch
+8
+B
d0 11
©
dQ113
AM +8 ( VCO Stop)
•
s,-,
,::;-. L- ch
-2, OUT PUT
fREcl
~
dVR5
(')

www.SteamPoweredRadio.Com
I
I
1-3. AM Stereo Section
450kHz
P LL Syncrono us
Carrier Generator
r----------,
I I
I I
I
I
I
I
I
I
I I
sv
5V
I
l_ ___________ J ! Loop Filter!
:
I Phase Sit1e, I IM ultipl ier l
,--------- , ,--------,
I ~-"Iv\,-~ I I I
I I I I
(USB+LSB) I r'Vl,.,._.-t (L+R) : I
eO1O8 t---t-r_ --_-_-,__,---,..-1
1"-t- --
1
L _____ _ .J
<Pi lol Conce ll)
<p
,----------7
( USB-LSB )
' ~~ IN\, -~ I
I I
: .-JVl~ -1 L-R)
">- ____ _ ....,.
! Muling Dri,er I
,------ --- ~
I eOII'
1
I , I
I
I
I
I
I I
~,, ,}r~ ,-j- "': ::,~ ~~~.-.:-' ----J
L _ _______ J
[i'}Ioi"J ,gnol ~
9V 9V
r--- ------ --- -----,
I BPF MAGNAVOX system :
I
:¾vll (\ 5Ht 112 e1Cll4 I
I 1 09 __) \__ I
I
,.__ ' __ __,
, - - ----- ----- 7
I
I
I
I
I
I
I
I
I
I
I
I
I
sv~ -.---.- --, I
BPF
TU - S77AMX
I
I
I
I
I
I
I
I
I
I
I
I
I
¥e vR (\ 5Hz
?/o_J L
.>-- ..- ➔ I (AM
Stereo ln di)
_____ _______ _ .J
BPF
t
2S-U
eVR JC
I I
., .
BPF
¥,vR ,r5 Ht
1 11 2 Jl
eVR 11 7
+B
( Pi 101 55Ht Conceit)
I
I
I
I
I
I
I
>-------< -- .... I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
L --------- ------ -~
1. MAGNAVOX system: Available for AM stereo systems developed by Magnavox Consumer Electronics Company.
2. KAHN -HAZELTINE syste m: Available for AM stereo systems developed by K ahn Communications Inc. and Hazeltine Corporation.
3.
MOTOROLA system: Available for AM ste r eo sy stems developed by Motorola In c.
4. HARRIS system: Available for AM stereo systems developed by Harr is Corporation.
4

www.SteamPoweredRadio.Com
TU - S77AMX
2. ADJUSTMENTS
2 -1 . FM Ad j ustm e nt ( See Top View on Page 13 and Parts Locat ion F-4372 on Page 8)
STEREO SG SCOPE GENESCOPE
AUOIO OSC
VTV M
1) FM IF & Reference Fr e qu en cy Adjustm ent
Nole: 1 . SELEC TOR .................. ..... . ........................... ...... FM
J . IF BAND ... ............... .. ........................................ WI DE
2. FM MODE ....................... ........... .. ..................... MONO
4 . RF MODE. .......................................................... DX
FEED SI GNA L
STE P SUB J ECT
TO
MEASURE OUTP UT AD J UST AD J UST FO R R
EMARKS
FROM
1.
Reference
No I nput
-Between
Po int @
rrc,
25 kHz • Short between
Frequency
Adj.
(Pin 24 of f!Cl ) & (F-4372) Point ® & Point
Ear th
© ( Pi n 36 & 42
Freq. Counter
of flC ll
2. IF Coi l Ad j.
98MHz ANT Input
ANT Between Poi nt @
IFT Coil
Max. DC Vo lt
20dBf (14.8dB), termianl (Pin 13
of dlC3 ) & (Front-end)
lkHz (100% MOD. ),
30011 Earth & dT1
FM
SSG
DC Vol t Me ter (F-4372)
IF Wide Gain Adj . Same
as above Same
as
Same as above -Read
the indication IF Band
above
on DC Volt Meter. .... NARROW
dVR2 Equal
DC Volts of
IF BAND
(F-4372) wide ba nd and ..... WI DE
narrow band.
) . Discriminator I
No I nput -Between TPl & TP2 dT2 G)
DC 0V±30mV
• Repeat procedures
Co il Adj . (Accross dR34, (
F-43 72) as stated in s ub jecl
In case
of
F-4372) 1 & 2.
using
DC Vo lt Mete r
~
Ge nescope 2
Output S0dB, IF Terminal Between Point © dT2 @ Steep lin
ea r ity of
Genescope (Front•end) (dC27) & Earth (F-4372) S
cu rve.
&
Ea rth
Make symmetrical
S cu rve.
Discriminator 1
No Input
-Between
TPl & TP2 dT2 G)
DC 0V±30mV • Repeat procedu res
Co il Adj.
(Accross dR34. (F-437
2)
as stated in subject
In case
of
F-4372) 1 & 2.
using Di
st
DC Vo lt Meter
meter 2 98MHz
ANT Input ANT
OUTPUT L -C H or
dT2 @ Min. THO
65dBf (59.BdB), t
ermina l R- CH
(F -4372)
lk Hz (IO0"lo MOD.) , 300 11
VTVM & SCOPE
FMSSG
4. LOCK ED Level Adi .
98MHz ANT I nput
Same as
• LOCKED L ED dVR4 6
ind icat or LED
S TEREO
35dBf (29.8dB), above (F-4372) l
ig ht up. ' . I
'If''
. c:J O c c::J ~
lkHz (100% MOD.).
,,
LOC•E"O
,,
FM SSC
I I
•Technical Hin t for FM adju st ment
There are two kind in ind ication of FM SSC output a ttenuator
1. Atte nuator with marking of 75 {} open .... .. ......... open indi cation
type.
• The
followi ng table shows relations among FM SG atten uator indi-
cati
on (dB), ava il ab le power ratio (dBi) and antenna terminal vol-
tage
(dBl µV ) in each indication typ e.
2. Attenuator with m
arking of 75 11 l oad or close.................... load
or close i
nd ication type.
FM
SG o utp ut level in this FM adjustment are de scribed as ope n lndi -
cation type.
To feed FM signal, a dummy antenna c ir cuit as Fig. 2-1 mu st be con-
nected between FM SG output and ANT terminal (30011 ) oi th e unit.
Fig . 2-1
5
P9
~
Dummy antenna
n ind ic ation typ e Ope
Load
indic
or close
at
ion type
FM SG
Available Antenna
Attenuator P
owe r Terminal
Indicati
on
Ratio Vo ltage
0 dB -0.8 dBf
- 6 dB/µV
66 dB 65.2
dBf 60 dB/µV
0 dB 5.2
dB( 0 dB/µV
60 dB 65.2 dBf
60 dB /µV
I
t
I
•

www.SteamPoweredRadio.Com
I
•
2) REC Calibration \eve\ Adjustment
STEP
l.
SU SJECT
Calibration Level
Adj.
FEED SIGNAL
FROM TO
98MHz ANT In put
65dB! (59.SdB),
MONO
lkHz (100% MOD. )
ANT
terminal
300{l
MEASURE OUTPUT
OUT PUT R or L-CH
VTYM & SCOPE
Same as
above
ADJUST
dVRS
(F-4372)
ADJUST FOR
Read the indication
on VTYM.
-4dB from the
above reading.
REMARKS
RK CAL SW.... OFF
REC CAL SW .... ON
3) FM STEREO Adjustment ( See Top View on Pa ge 13 and Parts Lo c ation F-4372 on Page 8 and F-4375 on Pag e 9)
Note: 1. Mode .. .. . .............. ..... ...... ............................ ...... STEREO
STEP SUBJECT
FEED SIGNAL
FROM
TO
MEASURE OUTPUT ADJUST
ADJUST FOR
REMARKS
l.
PLL VCO 1 98
MHz ANT Input
AN T Between dTPl & dTP~ dVR105
DC 0V±0.0SV
Free Running
65dBf (59.SdB)
terminal
(F-4375) (F-4375)
Fr equency Adj .
FM SSG . No. MOD. 3000
DC Volt Me t er
2 Same as
above
Same as Between dTP3 & Earth
dl10 1
304.000kHz
ab ove
(F-4375)
(F- 4375)
Frequency Co unt er
2. Pilot Offset
Adj , 1 Same as above
Same as
Be tween dTP2 & dTPS dVR104
DC 0V±0.1V
above
( near dVRt04)
(F-4375)
(F-4375)
DC Voll Me ter
2 98MHz ANT I nput
Same as
STE RE O Indicator
-
Confirm that
65dBf (59.B dB ), above
STEREO Indicato r
FM
SSG. Pilot
light up .
l
9kHz ( 9% MOD. ),
STEREO SG.
3.
19kHz Phase Coil
98MHz ANT Input
Same as
Between Point ®
dL10 3
Adj.
65dBf (59.SdB ),
above (
Rl 13) & Ea rth (F-4375)
~
In case of using FM SSG.
(F-4375) CHI
..... Wl s witch-
dual chan nel 1
kHz Sub channels CH1
of Dua l chan ne l
int signal
oscilloscope (100%
MOD. ) oscilloscope CH2 .. ... su -carrier
STE REO SG. Between cross•
c
ond uct or (JW8) &
Earth (F-4375)
CH2 of Dual chan nel
osci llo sc ope
ru
'-
Equal widths of
Wl Switching sig-
nal and s ub - carr ier.
19kH z Pha se Coi l
98MHz ANT Inp ut Same as
OUTPUT L-ch dL 103
Min . Indication on
Adj. 65
dBf (59 .BdB), FM
above VTYM & SCOPE (F-4375)
VTVM.
In case of using
SSG, Pilot
VTYM
19kH z (9"/o MOD.) ,
R
MOD E
1OkH
z+ Pilot
(1
00"/o MOD.) ,
STEREO SG.

www.SteamPoweredRadio.Com
TU-S77AMX
STEP
SUBJECT
FEED SI GNAL
FROM TO
MEASURE OUTPUT ADJUST
ADJUST FOR REMARKS
4. Birdie Noise 98MHz ANT Input ANT
OUT PUT dVRl00
Mi n. beat noise Bi rdie Noise is
Cancelling Adj
65dBf (59.BdB), terminal VTVM & SCOPE
(F-4375) level ~enerated by inter-
FM
SSC. PIiot
J00fl
erence from modu-
I9kHz (9% MOD.) rated side band of
STEREO SC. alte rn ate sta tion.
I 15kHz
7-8V, Be tween
Audio SG. Point©
(d R10 2)
through
47kohms
re sistor &
Earth
5. Pilot Cancelling I
98MHz ANT I nput ANT
Between dTPS dVR104 Min. 19kHz
Pilot 19kHz
Adf. 65
dBf (59.8dB), terminal (n
ea r dlC6) & Earth
(F-4375) signaI level ..... No Modulation
FM SSC.
J0Ofl SCOPE
2
98MHz ANT Input Same as
Same as above -Confirm that
65dBf (59.8dB), above 7
9kHz pilot signal
FM
SSC. Pilot i
ndi cated on
19kHz (9% MOO , ),
scope.
STEREO SG.
3
Same as above Same as Between Point ®
dll00 Min. 19kHz Pllot
above (dR146L) &
Ea rtli dVR103L signal level
Audio Spectrum (F-4375)
Analizer
or Scope
through 19kHz band
pass filter (B .P.F.)
I
4
Same as above Sa me as
Between Point ~
dVR103R Same as above
above
(dR146R) & Earl dVR106
Audio Spectrum
(F- 4375)
Analizer
or Scope
th rough 19kHz band
pass fi lt er (B.P.F.)
6.
Separa tion Adj. 1
98MHz ANT In put Same as
OUTPUT R-CH
-
Read the lndication IF
BAND ..... WIDE
(WIDE band) 65dBf (59.8dB), above VTVM &·
SCOPE on VTVM. Confirm R->L-CH
FM SSC. Pilot OUTPUT L-CH dVR102L
-34dB from the
19kHz (9%
MOO.)
R MODE lkHz+Pilo t VTVM &
SCOPE
(F-4375) indication above. t
(100% MOD.) ,
STEREO SG.
2 98MHz ANT In put
Same as OUTPUT L-CH -R
ea d the indication IF BAND ..... WIDE
65dBf (59.8dB), above VTVM &
SCOPE on VTVM Confrim L_.
R-CH
FM SSC. Pi l ot
OUTPUT R- CH dVR102R -34dB from the After this adjust-
19kHz (9% MOO.),
L
MODE lkHz+Pllot
VTVM & SCOPE
(F-4375) indication above. ment, perform
(100%
MOD.),
STEP4. Birdie Noise
STEREO SG.
Ca ncelling Adj.
7. Separation Adj. 1
98MHz ANT Input Same
as OU TPUT R-CH -
Read the indication IF BANO
(NARROW 65dBf (59.BdB), above VTVM & SCO
PE
on VTVM ..... NARROW
ba nd) FM
SSC , Pilot OUTPUT L-CH
dVRl0 l l -3 4dB from the Confirm
R-L-CH
19kHz (9% MOD .)
R MODE lkHz+Pilot VTVM &
SCOPE
(F-4375) indication above. I
(100% MOO.) ,
STEREO SG.
2 98MHz ANT I nput
Same as OUTPUT L-CH -
Read the indication IF BAND
65dBf (59.BdB), above VTVM &
SCOPE on VTVM ..... NARROW
FM SSC. Pilot
Co nfirm L->R-CH
19kHz (9%
MOD .), OUTPUT
R-CH dVR101R
-34dB from the After this adjust-
L MOOE
lkH z+Pilot
(100%
MOD.)
VTVM & SCOPE (F-43751 indication above. ment, perform
STEREO SG.
STEP4. Birdie Noise
Cancelling Adj.
8.
Muting Leve l Adj.
98MHz ANT Input Same as
Stereo indica tor dVR3 Stereo indicator
25dBf (19.BdBl. above OUTPUT L-CH
or
(F -43 72) turns ON or
FM SSC, Pilot
R-CH , Output Signal
19kHz (9% MOD .), VTVM & SCOPE
comes out
Lor R MODE
lkHz+Pilot
(100% MOD.).
STEREO SG .
9. Auto St op Level 98MHz ANT Input
Same as Digital Display
dVRl Turn the tuner to • Perform the auto-
Adj. 35dBf (29.8dB) above
(F-4372)
98MHz by using matic search
40dBf (34.8dB)
lkHx
the automatic tuning operation
(100%
MOO , ),
search tuning by depressing the
FM
SSC
operation.
TUNING button.
6

www.SteamPoweredRadio.Com
TU - S77AMX
2-2. AM Adjustment ( Se e Top View on Page 13 and P arts location F- 4372 on Pa ge 8)
1) AM IF Adjustment
GENES CO PE
AM SSG
Note: 1. SELECTOR......... .. ......... . ..... .................. ... ........ AM
2 . Conne ct AM loop ante nn a to AM antenna ter mina l
S TEP SUBJECT
FEED S IGNAL
FROM
TO
MEASURE OUTPUT ADJUST ADJUST FOR R EMARKS
1. IF
Coil Adj . Genescope Point (j)
Betw een Point ® eT3 Max , Waveform
Ou tput 60dB (eC8) (
eR 19) & Earth (F-4372)
I\
(F-4372) F-4372
2. 520
kH z
No Input -Be
twee n Point (D e
T1
1. lV:l::0 .2 V • Repeat procedur es
(
or 522 kHz ) (eR1, F-4372) & Ear
th
(F-437 2)
as stated in s ub ject
Tunin g Voltage Adj .
DC Vo lt Meter
2 & 3.
I
3. 1610 kH z
No In put -Sarne as above
eTCl 19 .7 V:1::0.2V
(
or 1611 kH z) (F-4372)
Tuning Vo lt age Atlj.
4. 600kHz 600kHz
(o r 603kHz ) ANT OUTPUT L-CH or
eT2 Max. Output
(or 603kHz )
ANT Input 30dB terminal R-
CH
(F-4372)
RF Adj . 400 Hz (30% MOD .), VTVM & SCOPE N
AM SSG
5. 1 400k Hz
1400kHz ( or Sam e as
OUTPUT L- CH or eTC2 Max. Output
(or 140 4k Hz } 14
04kH z} ANT lnpul above R- CH
(F-4372)
RF Adj , 30
dB 400H z (30% VTVM & SCOPE
MOD.) , AM SSG
6, LOCKED Level Adj. 1000 kH z ( or Same as
LO CKED LED eVR2 6 lnd f cator LED
STEREO
999kHz) ANT Input above
(F-4372) l ight up .
\1,111,. I ,\\II ,
C c:::J ' D ~ c::J "
S0dB 400Hz (30%
·,n,,•\.oc~ED'
11 \ •
MOD. ), AM SSG
I I
7. Auto Stop Level lOO0kHz (
or Same as Between Point
~ eVR1 1.lV±0.1V
Adj.
999kHz ) ANT Input above OW2 F-4372) & Earth (
F-4 372)
65dB 40 0Hz (30% DC Vo lt Met er
MOD. ), AM SSG
I 2)
AM STEREO Adjustment (See Top View on Pa ge 13 and Pa rt s loc a tion F-4367 on Page 11 and F-4535 on Pag e 1 2)
Nole: 1. MODE .......... ....... . .. ... .................... ........... STEREO Loop
Antenna AM Loop A nf enno
2. Thls adjustment needs AM St ereo SG
60cm
3. Se tti ng of AM Ste reo SG
•M ODE Frequency...... .. ................. ..... ........ 4 00Hz
• Main Cha nn el MOD ..... ... .. ....., .... ...... .. . ...... .. 30 % 0
STEP SUB JECT
FEED SIGNAL
FROM TO
MEA S UR E OUTPUT ADJUST ADJUST FOR
REMARK S
---
1. Muting Level & 1
No In pu t -Between Point G)
eVRl0l High Le ve l
VCO A dj.
(P in 1 of elC104) & F-4367
(DC8 . SV )
GND
c omes out
DC Vo lt Meter
---
2 No In put - Betw een Point @ eVR102 DC0mV:1::30mV •Repeat
pro ce dur es
(Pin 7 of elC104) & F-4367
as staterl in su bj e ct
Poin t ~ (eR134) 2 &
3.
DC Vo t Meter
3
No Input -Be
tween Point © eT101 450 kH z:1::S0Hz
(Pin 8 o( elC101 ) & F-4367
GND
Fre quency Counter
4
1000kHz ANT Inpu t ANT OUTPUT L- CH or eVR1 01
Mu ting point
40dB terminal R- CH
F-4367
R-.L
MOD E VTVM & SCOPE
AM Stereo SG
7

www.SteamPoweredRadio.Com
I
I
•
3. PARTS LOCATION & PARTS LIST
3-1. F-4372 FM , AM Tuner & Synthesizer Control Circuit Board (Stock No. 00783801)
Com pon en t side A B C
1
2
3
4 i
JP 18
TU-S77AMX
Parts Li si < F- •
Parts No.
•Transistor
d01
d02
d06
d07
d08
d09
d0 10
d011
d012
d013
d014
d0 15
d0 16
d017
d018
• FET
dFTl
dFT2
•I C
dl Cl
dlC2
dlC3
dlC4
•Diode
d02
dT3
dT4
dT5
dT9
dTlO
dT11
dT12
dT13
dT14
dT15
dT16
dT17
dT18
dT19
dT20
dT21
dT22
dC50
dC51
dC Fl

www.SteamPoweredRadio.Com
- S77AMX TU - S77AMX
Parts Li st < F-4372>
Parts No . Stock No . Description Parts No. Stock
No . Description Parts No. Stock No. Description
46725000 FM Frontend Pack dCF2 46867100 Ceramic Filter 109 46367201 2SA1048
(SFElO 7MM RED) 1010 4636730 1 2SC2458
• Tr ansistor
dCF3 46867100 Ceramic Filter
dOI
4639190 1 2SC2785 ISFE10. 7M M RED) •FET
d02
4639 1901 2SC2/Bb dCF4 46920000 Ce r amic Filter fFT1
0370300 1 2SK117-Y
d06
4636700 1
2SA1115
(SFEl O 7MXK -N) or 03 7 03002 2SK117-GR
d0 7
46367001
2SA 1·115
•IC
d08
4636710 1 2SC2603 d l1 46548900 Balun
IICl 4639 7 400
TC9157P
d09 46391901
2SC2785 dl2 46174400 Inductor 3 3µH flC2
0722 5 000
TD6 1 04P
d010
4 639200 1 2SA1 1 75
dl3
46175300 Inductor 1 OO µH flC3
036 0 4100 TC4011P
dOl 1 4639190 1
2SC2785 dl4 4 6174400 Induc t or 3.3 1,H fl C4
46530000
TC 4022BP
d0 12
46391907 2SC2785 dl5 46174400 Inductor 3. 3µ H
d
013 4639 1901 2SC2785
fXOl 07237700 Qua rt z Element
d014
4639 1 90 1 2SC2786 dT 1 46369500 FM IF Cod
NC -18C
d015
4639 1 90 1
2SC2785 dT2 46724600
FM IF Co il
d0 16 4639 1 90 1
2SC2785 •D iode
d0 17
4639 1901 2SC2785 dVRl 1 0352100 220 k!ll Bl S,V R
fDl 031 1 760 0 1
S2473T77
d01 8 46392001
2SA1 1 75 FM auto stop
or 460 86 000 1S I588TP-3
le ve l adj .
f02 03 11 7600
1S2473T77
•FET dVR2 1
0350400
330 0( B) S.V R., or
46086000
1S1588TP-3
dFTJ
46724700 2SK241-Y IF wide gain adj, f03 03117600
1S2473T77
or 4672470 1 2SK241 -GR dVR3 1 035 1 700 47 k!l (B) S.V. R. .•
or 46086000
1S1688TP-3
d FT2
46724700 2S K241-Y Muting level adj . fD4 03117600
1S24 73T77
or 46724 701 2SK241- GR dVR4 1035 1 300 70 kll( BI S V R , or 46086000
1S1 588T P -3
FM Strength
f0 5 03 11 7600
1S2473T77
•I C signal level adj . or
4608 6 000 1 S1588 TP -3
dlC1
03605400
,,PC1163H
dVR5 1035 1 300 1 0k l1( 8) S.V.R., fD6
03 1 17600
1S2473T77
dlC2
03605400 ,,P C1163 H Rec calibration
or 460860 00 1S1588TP-3
dlC3
46725900 HAI2412 -01
f07 03 117600 1S2473T77
dlC 4
07224800 TC4066BP 1
MR38
08922100
22 !'1 11 2W N I.A. or
46086000
1S1588TP-3
ID B 031 176 00 1 S2 4 73T77
•Diode •
Transistor
or46086 0 00 1S1588TP-3
dD2
03 1 17600
1S2473T7 7 e0 1
4636730 1 2SC2458
fD9 031 1 7600
1S2473T77
01 46086000 1S1 588 TP-3 or
46086000
1S1588TP-3
•FET fDl O
031 1 7600 · IS2473T77
dT3
03 1 17600
1 S2473T77 eFI 1 46393000
2SK192A-Y
or 46086000 1S1588TP-3
or 46086000
1 S1588 TP-3 or
4639300 1 2SK192A - GR
!0 11 03 1 17600 1S2473T77
dT 4
03117600 1S2473T77 or
46086000 1S I588TP -3
or 46086000 1S1588TP-3 •IC f012 03 1 17600
1 S2473T77
dl 5
03 11 7600
1S2473T77
e lC1 46724000 LA 1247
or 46086000 1S1588TP-3
or46086000
1Sl 588 TP-3 elC2
03607700 NJM4558D f013
03 1 17600 1 S2473T77
c1T 9
03 1 17 600 1S2473T77 or 46086000
1S I5 88TP-J
or 46086000
1S1588TP-3 •
Zener Diode
fD14 03117600 1 S2473T 77
dT10
03 1 17600
1 S2473T77
eDZ1
46 1 12900
052 9.1-X
or 46086000
1S 1588 TP-3
or
46086000 1 S1588T P-3 or 46 1 13000 052 9 1-X tD 15
03117600 1S24 73 T77
d
Tl 1
03117600
1 S2473T77 or 46086000
1S1588TP-3
or
46086000 1S1588TP-3 eC32 46693600 2200pF 50V F C fD16
03117600 1S2473T77
(I T12 0311
7600
1S2473Y77 or 460 860 00
1S1588TP-3
or
46086000
1S1588TP-3 e
TCl 46095600 Tnmmer 1017
03117600
1S2473T77
r ll 13
03 11 7600 1 S2473T7 7 Capacitor 20pF
or 460 8 6000 1S1588TP-3
or
46086000
1S1 588TP-3
eTC2 46095600
frrmrner !018 03117600 1S2473T77
d
T1 4 03 1 17600
1 S2473T77 Capacitor 20pF
or 46086000
1 S1588 TP -3
or 46086000
1S1 588rP -3 fD19
031 1 7600 1 S2473T77
dT 15
03117600
1 S2473T77 eCFl
46724400 Ceramic Filte, or
46086000
1S 1588TP-3
or
46086000 1S1588TP-3 eCF2 46578100 Ceramic Fi lter
dT16 03117600
IS2473T77 IC10 46151500
2200 µF 6. 3V E L
or 46086000 1S1 588TP-3 e ll 46724100 AM RF Coil IC14 08451700
l µF 50V E.B.
dT 17 03 1
17600
1S2473T77
eT2 46724200 AM RF COI i
or
46086000
1S1588TP-3 eT3 46724300 AM IF Co il fTCI 4 6095800 Trimmer
d
ll 8
03117600
1S 2473T77
e T4 09104600 Low Pass Filter Capacit
or 45pF
or
46086000 1S1 588 TP -3 or
46 1 63000
Tri mmer
d Tl9 03 1 17600
1 S2473T77
eVRl 1035 1 700 47k fl t8I S.V.R., Capaci
to r SOpF
or 46086000 1S1588TP-3 AM stop l ev el
dT
20 03117600 1 S2473T77 eV R2 1035 1 700 47k fl (B) S.V R., fEP1
46255 5 00
LITHI UM BATTERY
or 46086000
l S1588TP-3 AM strength signal CR2430
dT
2I
031 1 7600 1S2473T77
or 4608600 0 1S1
588TP -3 •
Transistor
oSl 46725300
Push SW, REC CAL,
dT22
031 1 7600 1S2473T77 101 46367301 2SC2458
RF BAND, IF BAN D,
or 46086000
IS1588TP -3 102
46367301 2SC2458
NO I SE CANCELL ER ,
!03
46367201 2SA1048
FM MO D E, TUNI NG
dC 50
46695300
0 0 I I1 ,F 50V F C 104
46367301 2SC2458
oS2 46 1 77200
Slide SW .,
dC
51
466 9 5300 0.0 I lµ F 50V F.C 105
46367301 2SC2458
AM STEP !XX)
106
46367301 2SC2458
dCFI
4 6920000
Ceramic Fi lter 107
46367301 2SC24 58
!SFE10 7MXK- NI
fQ8
46367201 2S/11048
8

www.SteamPoweredRadio.Com
3-2. F-4375 MPX
Circuit
Componen t side A
1
I
2
I 3
4
•
9
Board cs
tock No. 00787701)
0
N
"
B
TU - S77AMX
C
0
Ii
i, □ 0:
'"'"' C
-0
-0
Cl 44 ~1
0 ~ -<
@
~r
"'
C21
5 e-
----AN'-
0·1~1~
~ I!
AC 3V

www.SteamPoweredRadio.Com
TU-S77AMX
Parts li st
Parts No. Stock No . Description Parts No. Stock No. Descripti
on
•Transistor : dR3
08922500
47 1'! 1/2W N.I.R
d0101
46581/01 2SC1845 _ !', dRlOO 00 11 8000
22 1'! 1/4W F.R
d0102
46581601 2SA992 f dR101 00 118000 22 !l 1/4W F.R
d0103 46540801 2SC2878 .!,dR149 00118000
22 !1 1/4W FR
d0104 46540801 2SC2878 : dR190
00118000 22 0 114W F R
ct0 l
05
46540801 2SC2878 : dR203 00 118000 22 0 1 14 W FA .
d0106 46540801 2SC2878
d0 1 07
46581701 2SC1845 dLFlOO 46894900 L ow Pass Filter TF 10
d0108
46581701 2SC1845
d0 1 09
46581701 2SC1845 dLIOO 46723500
RF Coil
dOl 10 46581601 2SA992 dL 102 46174400 l11duc 1 01 3 3/lH
dOl 11 46392001 2SA1175 dLIOI 46723400 RF Coil
dO 112 46391901 2SC2785
dll03 4240720 1 FM MPX
Corl
dOl 13 46581701
2SCl846
dOl 14 46391901 2SC2785 dVRlOO 1 0342300 2 2k 0'6 I S. V R., Bee t Cancel
d0 11 b 46391901 2SC2785 dVR101 10343300 1
OOk f! {B) S.V R . Na rr ow
dO l 16 4639200 1 2SA1175 Sparat,on
<10117
46581701 2SC1845 dVR102 10342300
2 2k !11B ) S.V.R., W ,d e Separat,on
dVR103 10343100 47k
fl (BI S V R . Pi l ot Cancel
•
FET dVR1 04 10342700
1 Ok fl (B) S V.R , PIiot on Set
dFTlOO
46643700 2SK246-Y dVR105 10342700 10kf!IB) S.V. R, VCO Off Set
or 46643701 2SK2116 GR dVRI06 10342300
2. 2k0\B) S.V R , Pilot Cancel I
or 46643707 2SK246·BL dS2 07251 1
00 Slide SW FM de entacess
•I C
dlC& 16723700 N
JM14960 •I C
dlC6
46579100 M5219L flC5 03604100 TC401 1P
dlC7
46/23700 NJM1496D
dlC8
03607700 NJM45580 • Transistor
dlC9 46723700
NJM1496D !
mOl
03083901 2S0313Al
dlClO
46723700 NJM 1496D
dlCl I 46465500 MSM4030RS
•I C
cHCl 2
03604400
MSM4 520
f mlCl
46361500 L78N12
dlC
13
03607700 NJM4558D
! dlCll\ 46359400 L78N05 •Diode
'. dlCl 5
46361500 L78N12 :
mD6
03117600 1S37T77
01 46086000
IS1588TP·3
•Diode
dDIOO
03 11 7600 1S2473T77 46725200
2P OUTPUT Terminal Board, OUT
or 46086000
1S 15B8fP-3 PUT
dD IOI
03 117600 1S2473T77
(.H 46086000
1S1588TP-3 :
111R I 00179000
l0fl1WNIR
tmlo:?
03117600 IS 2473 T77
or
46086000 1S1588TP ·3 • Transistor
dD103
03117600
1S2473T77 sOI 46367201 2SA1 048
I
or 46086000
1S1588TP-3
s02 46367201 2SA1
048
ctD104
03117600 1S2473T77 s03 46367301 2SC2458
or
46086000
IS1588TP-3 s07 46367301 2SC2458
• Varactor Diode •IC
d0105
46087800 FCC66M stC1 46410100 TD6301AP
s1C2 46392500 B/16125
•Diode
dD106
03117600
1S2473T77
•D iode
or 46086000 1S1588TP-3
s02
03111600 IS2473T77
c.ir 4608fl000 1S 1588TP·3
dCI08
08451700 lµF 50V E.8
dG 110
08451100
22 1t F 16V EB .
sPL 1 46526400 FL. Display Tube FG78H8GR
dC119 46694200
3900pF 50V F C
dC122
08451700
lµF 50V LB.
sP.1 6 46049600 lOk f!x 10 1 i8 W A.R
rJCl30 08451
/00 lµF 50V F B sR 17
46049600 lOkflX 10 1 18 W A.R
dCl3 1 08451700 1 µ. F 60V EB sR l8 46045900
10k{l x8 l/8W AR
<JC 135
07 1 46600 lOOOpF lOOV PC

www.SteamPoweredRadio.Com
I
I
I
I
•
TU- S77AMX
3-3. F-4377 Power Supply Circuit Board (Sto ck N o. 00 760401)
Compone
nt Side
4377 FIXED
PART S(p)
51
Cl DL ,...1i.. Rl
1 2 LJ -.NV--
/ ll I t~ o2
H ✓ o •
CD
c2 o, POWER SUPPLY lm) c,
! + ) cs ttt c
9
--<~
t m 4 5
CG -H--- '< L&J t- ~
-o- o I C2 ~
a + ., c:::::J ·t + ' , n
LJ -M J J ~ 4-
C5 : ~ t$! m~,. i 1(1) ...!!!!.!...__ 02 f• A'" '
JP(ii)..... " "I. LI'-+-": + l' + Sl. □ sp 10 ae
I I T T f - - CJ C4
J l 3 4 5 6 I C3 I 2 3 4 5 -H--- -H-
Parts Li st
Parts No . Stock No . Description Parts No. Stock No. Description
•IC •Zener Diode
..! .mlC2
46361200 L78N06
.: rnlC3
46361800 L78N24
mDZl 46107500 052 6.2-X
or 46101600 052 6.2-Y
or
46101700
052 6.2-Z
•Diode
i rnDl 07193300
UB-152LFF mC5
46280900 0.22µF 50V FC
r mD2
46273600 0B810-B
! rn03
03 1 17700 10E-2 J,
pC1 46425800
O.OlµF 400V C.C.
! mD4 03117700 10E-2
'rnD6 03111600 1S2473 b pSl
46413900 Push SW.. POWER
or 03111800 1S1588
3-4. F-4374 Preset
Memory Circuit Board
Co mp onent Side
Parts
Li si
Parts No . Stock
No . Description Parts No. Stock
No . Description
• LED
sL08 07250900 TLG-123A
sLDl
07250900
TLG -123A or
46470300 SEL2410E
or 46470300 SEL2410E
sLD2
07250900
TLG-123A
sS4 46708100 Push SW ., PRESET STATI ON 1
or 46470300 SEL2410E sS5
46708100 Push SW, PRESET STATI ON 2
sLD3
07250900 TLG-123A sS6
46708100 Push SW., PRESET STATI ON 3
or 46470300
SEL2410E sS7
46708100 Push SW.. PRESET STATI ON 4
sLD4
07250900 TLG-123A s58
46708100 Push SW ., PRESET STAT IO N 5
or
46470300 SEL2410E sS9
46708100 Push SW., PRESET STATI ON 6
sLD5
07250900 TLG-123A
sS IO 46708100 Push SW ., PRESET STATI ON 7
or
46470300 SEL2410E
sS 11 46708100 Push SW., PRESET STATION 8
sLD6
07250900
TLG-123A
sS 13 46708100 Push SW ., FM/AM
or
46470300
SEL2410E
sLD7
07250900 TLG-123A
or
46470300
SEL24 IOE
3-5. F-4376 RF , IF & STEREO Indicator Circuit Board
Component Side
"' ~
C,
"'
c,.;;6"6
437 6 l Parts No.
Sto ck No . Description
I• ••
•
•• ·I
GJ
w GJ sLD13
46 176900 TLS-123
l C ,ov
, 0 1 1t.1 l {)1'1 ,
or 46470200 SEL2210S
r--r-r
35 ;E,1
'" '
sl0 14
46176900 TLS123 Ci QtflO..,.CJ ... , or
46470200
SEL2210S
Parts Lisi sLD15
07251000 TLY-123
sLD16
07251000 TLY-123
Parts No . Sto ck No . Description
sLDl 7 07250900 TLG -1 23A
• LED
or 46470300
SEL2410E
sL D18 07250900 TLG -123A
sLDlO 07251000
TLY-123 or
46470300
SEL2410E
sLDl 1
46176900 TLS -123
or 46470200 SEL2210S
slD19
07250900
TLG-123A
sLD12 46176900 TLS-123 or
46470300 SEL2410E
or
46470200
SEL2210S
10

www.SteamPoweredRadio.Com
TU- S77AMX
3-6. f-4367 AM Stereo Circuit Board (S tock No. 00 784201)
Top View (Component side) with Bottom Side Pattern
Point
Point © Point
@!
Po i nt @
Top View with Top Si de Pattern
Part s li st <F -43 67>
Parts No. Stock No. Description
•T ransistor
e0 1 01
46208401 2SC2839
e0 1 02
0729970 1 2SC2603
or 46392101 2SC2785
eQ 1 03
03067401 2SC 1 845
e0104 03067401
2SC 1845
e0105
07299701 2SC2603
or 46392101 2SC2785
e0106 07299701 2SC2603
or 46392101 2SC2785
e0 1 07 0729970 1
2SC2 6 03
or 46392101 2SC2785
e0 1 08
0729970 1 2S C2603
or 463921
01
2SC2785
e0109
07299701 2SC2603
or 46392101 2SC2785
eOl 10 07299701 2SC2603
or 46392101 2SC2785
e01 11 461 18801 2SC2878
e01 12 461 18801
2SC 2878
eOl 13 07299701 2SC2603
or 46392101 2SC2785
e0 1 14 07299601 2SA1115
or 46392201 2S A1175
e01 17 07299701 2SC2603
or 46392101 2SC2785
•IC
elC101 46723700 NJM1
4960
elC102 46723700 NJM
14 960
e1Cl03 46147700 M5218L
elC104
46147700 M5218L
elC105
46147700 M5218L
elC1
09 46359400
L78N05
1 1
~
I
Parts No. Stock No. Description
elC1 10 46860000 TC401 6BP
or 46863900 M4016BP
•Diode
eD101 46868000 1S2473
eD102 46868000 1S2473
eD1
03 46868000 1S2473
eD104 46868000 1S2473
eD105 46868000 1S2473
eD106 46868000 1S2473
eD107 46868000 1S2473
eDl 15 46932400 Voltage V.C. Dione KV 1226X
•Diode
eO l 16 46868000 1S2473 I
eD1 I7 46868000 1S2473
eDl 18 46868000 1S2473
eD122
46868000 1S2473
eD 123 46868000 1S2473
eCl 12
46649900 0. 01 /.l F 100V FC
eC l 13 46932500 l 20pF 50V CC
eCl 16 46867300
6,8 /.l F 50V EB .
eC121
46936300
0 33µF 50V E B L
el l OI 46894600
h iductor 120µH
eTI0 1 469 17900 AM RF Coil
eVR 1 01 46634300 l OK S.V.R
eVR102
46634300 10K S V R
eVR103
46634300 10K S.V R

www.SteamPoweredRadio.Com
I
I
I
I
3-7. F-4535 AM Stereo Method Detection Circuit Board (Stock No. ooao190 1)
Pomt •J
Component Side
Point g
Poin t I
Parts
li st
Parts
No . Stock No . Description
•Transistor
e0121 07299701 2SC2603
or 46392101 2SC2785
e0122 07299701 2SC2603
or 46392101 2SC2785
e0123 07299701 2SC2603
or 4639210 1 2SC2785
e0124 07299701 2SC2603
or 46392101 2SC2785
e0 125 07299701 2SC2603
or 46392101 2SC2785
e0126 07299701 2SC2603
or 4639210 1 2SC2785
eOl27 07299701 2SC2603
or 463921
01 2SC2785
•
IC
elCl 13
46147700 M5218L
elCl 14 46147700 M5218L
elCl15 46147700 M5218L
elCl 16 46147700 M5218L
elCl 17 46147700 M52 1 8L
•Diode
eD 124 46078000 1S5133
eD 125 46078000 1SS133
e0126 46078000 15S133
e0127 46078000 1SS133
eD128 46078000 1SS133
e0 129 46078000 1SS133
e0 130 46078000 1SS133
e0 131 46078000 1SS133
3-8. F-4373 Tuning SW. Circuit Board
Component Side
Po1n1 k
Parts N o.
eD 132
e0 133
e0134
e0135
e0 136
e0137
eD 138
e0139
eD 1 40
eC 156
eC157
eC159
eC160
eC161
eC162
eC163
eC164
eC165
eC166
eC1
71
eC 173
eVR109
eVRl 10
eVRl 11
eVR 112
eVR113
eVRl 14
eVR1 16
eVR l 16
eVR 117
Parts Li st
Parts No.
• LED
sLD9
sSl
sS2
sS3
sS12
Sto ck No.
46078000
46078000
46078000
46078000
46078000
46078000
46078000
46078000
46078000
46692700
46692700
46284600
46284600
46692700
46692700
46692500
46692500
46692100
466921
00
00304300
46936100
46839600
46839600
46839500
46839500
46839400
46839400
46839400
46839500
46840000
Stock No.
46176900
or 46470200
46708100
46708100
46708100
46708100
TU-S77AMX
Description
1SS 133
1$S133
1SS133
1SS133
1SS133
1S5133
1SS133
1SS1
33
1SS133
0.22µF
50V FC
0.22µF
50V F.C.
0.47µF
63V FC
0.47µF 63V F.C.
0.
22µF 50V F.C.
0 22µF
50V FC
0.18µF
50V F.C.
0.18µF 50V F.C .
0.12
µF 50V F.C,
0.
12µF 50V F.C.
1OµF
16V E.B.
0.15µF
50V E.BL
10K S.V .R.
10K SVR .
4.
7K S.V.R
4.
7K S. V.R
22KS .VR
2.2K S.V.R,
2.
2K S.V A.
4. 7K S. V.R .
220K S.V.R
Description
TLS-123
SEL2210S
Push SW., UP
Push SW ., DOWN
Push SW , MEMORY
Push SW.. RESET SCAN
12

www.SteamPoweredRadio.Com
TU- S77AMX
4. OTHER PARTS
4-1. Front View
4-2.
Top View
,,
r,
I I
I
I
I
I.
10 - - - -
Parts Li st < Front View>
Parts
No . Stock No.
1 47326 1 00
2 47301000
3 46708 1 00
4 47300300
5
46725300
6
47324600
/1:,,_7
46413900
13
~ ~ J z.-,----"ll OK ~ K
eT2, / ,--,
a>-._.' _r- eT C1 ·~
en ---- - ,; ~ - dv iy
-:: qi " TP1~ ' Q ::::= :~~• IF
TP5~ Q Tfl2\ , i7 ti .r, dV ~2 /4:~ FT
~ 01 JVR106:---\ ...\ dT1
-. --. ~ jVR103l ~ \_ dlC6r, J!.~\' ---< ,' ., .
p4 __! jVFl1O 3~ / ~ \
VR1
\
dl 1 03- dJ2 dT2a I .,-d VR3
I : ~ VR ~ · )O~
t. l F- 4636 I ✓ /
a ~ ~\ ~d V ➔ 102L I Q flCl
Q \ Lct vR 1 01 L : I
dVR102R F-:'372 Cl
- ··- ·· -- F- 4375 dVR101fl ____ J
-®
- dVR6
Parts Li st < To View>
Description Parts
No . Stock No . Description
Front Panel
Ass'y
/!', 1
38004700
Power Supply Cord
Bonnet (XX, UL, CSA)
Push
SW, FM/ AM, MEMORY, 2 47 1 63600
AC Cord Cover
DOWN-, UP. PRESET STATION,
;t , 3 15015501 P
ower Transformer (XX)
PRESET SCAN J., 4 46364900
AC OUTLET IXX. UL. CSA)
Knob,
REC CAL, RF MODE. IF 5 46725200
2P OUTPUT Terminal
BAND, TUNING,
FM MODE. 6 07193200 Antenna Holder
NO I SE CANCELLER 7 46725100
Antenna Terminal
Push
SW ., REC CAL, RF MODE. 8 22301510
Ground Termi na l
IF BAND, TUNING, FM MODE, 9
47326600
Si de Panel R Ass'y
NO I SE CANCELLER
10
47300410 Joint Shaft
Knob,
POWER
11
47326400 Side Panel L Ass·y
Push
SW ., POWER
I
I

www.SteamPoweredRadio.Com
I
I
TU - S77 AMX TU - S77 AMX
A B C F G
SCHEMATIC DIAGRAM 5-1.
RF, IF & Control Section
•De s ig n and spec1hcab ons subject to cha n ge without notice for improvement.
·La present,on et les spec1f1cat1on s s ont suscept1bles d 'f tre mod1hees sans preav,s par sui tes d'amef1orat1ons eventue ll es .
•Anderungen, di e de m techmschen Fortsch n tt d1eoen. ble 1ben vorbehalten.
-------------------------------- -- --- -- _ -- - -- - -- _ ----- _ -- - - -::=::=ri
- (d) : DZI (S) - _ - - - - - 1! - • ~{l '" '·""
51
!ii
6
"" '""" •11
... o 80-.-!Wl -o I
~F-.:~~..,. -1 ,I
I
I
I
SC2
'I
I
AC)V
VT
SYMBOL OF FUNCTIOI
(d) FM
(e) AM
( f ) OSC CONTROL
( o) SELECTOR
( s) Rf INDICATOR
SttlTCH(S
S1· t REC. CALL I Off
t o,
51 · 2 : RF IQ)£
I OFT
' o, SI l .
JF BAND 'ttl O[
N llRR OW
$1· • .
HOfSf
I Off
CA1rtSU.Elt
l. ON
$1• $ ,,
....
ST£R£0/ M UTE (If
MON O/ NU T[ Of"F
St· 6 TU
NI NG I MI TO
2 .WANU Al
::~ ; : ~N ] lU \ Nii
1S3 : M( h'OR Y
,54,.11 STAfl ON 1~8
1S12 : PRESET SCA N
CAPAttTOIIS
,6 Ctr(ll'fll(
& ~IJl!Jffflt
• F"lt m lMyto rl
8P 81·PON r [lt Clf olyht
i\ 11 '"J,IF, UIHtH Ol~1MhOltd P pf
R[SIS10RS
0 Hon·l,.IIOllll'l'IOl>lt TJ l)t
Alt lll Ohl'fl1, 1/ 4 'tt tr s,: 5¼ lo lt r11 nn
1,1t, IH 1 01 11er .. ,u 11 01,4 ~. 10,M wn
[o,t. D.C. 1/0 1! 091 tllD W~ lht IIOftllftCIII
Volll Ill Vo l ll 01 IIO I~ 1 g~ ol
ThtV010 gtpo ~i nd1 <0 lts
t~• Vo l1 a91 111 Sl t l~ $1 91\0l 1 '"'11 1 10 11
101 TI..S11X,TU·WJ'Ni
lAl l\J'S77 1r11 X
H
2SC930 2SC2839
2SA992 2SA 1048
2SCl845 2SAll15
2SC2878 2SC2458
1i 2SC2603
,, .if
25D313AL l <
1
-~ ~lm
o< • m
2SK248·Bl l C 1
mm:g~ •wPCll63H
2SK117 -Y
2SK246·Y
C] ~;~;;~
D.' M5219L
2SK~:
5
2A - GR \
2SK241
GR
2SK192AY
2SK24l •Y
li§
~ · .,
•
HA12412-01 TC40t8
LAl245 M5219L
MSM
4030RS TC4068BP
MSM
4520 NJ M 1498D
NJM t498D lA1247
NJM4558D TC9147P
TC4011P
TC4022BP
TC9157P
TD8301AP
.. ,..- Sht• l...llf:
~-
L78N05 0B810 B
L78ND6fl
L78N12
L78N15 •. • ·
L78N24 1
~ ' .
m KV1226
'" ~
,..,
, ..
J ■ 1ffl
U8 -152LFF Jf
1 1
Al u
wgmJ~
11 11 0526 . 22
""" t~
1S168TP·3 ~
1S2473T77
10E·2 SEL2210S
A .1. ~t2~m
~t TLS 123
FM Line & L- ch (FM) Signal Line
~
R-ch (FMI Signal Line
---------- - -• AM Line & L- ch (AMI Signal Line
---·-•- R-ch (AM) Signal Line
1
2
3
4
5
14

www.SteamPoweredRadio.Com
TU- S7 7 AMX TU- S77 AMX
A B C D E F ______ _._ ___ __ __ _ G H
5-2. MPX Section
(2) f r.~7 -B - - - . .
I ' ,t,. .,CIS DECODER
+21v l
I L7 8NJ 2
,t,., 1(14
I
I
I
I
I
L78N051F=t--.:W. ,;;_ ..- -- -,- ----= ~1-+ _....,__~ __ __J
!_
I
I
I '
I
I
I
<1010 s .10 6,I03, I0 4
' 2SC2878(A,B)
I
I
I
d0Q1, 107,106 ,I09,l l:\l l7
2SCl 8 45(E,Fl
dOI0 2, ll0
2SA992(E,Fl
I I IIOlll,116
2SAll75 (J,H,F,E)
I
I
I
I
I
I
I,
I
I
I
d0112,114 ,ll 5
2SC2785(J,H,F,El
dOIOO,IO l, I03 ,1 04 ,I06
1S2473, 1S1588
I' FM (d)
dRIIO 680
dRI II 680
IF
C2 N.o.A'ROW
dRl38 IM
dRl391..lt.t
.----&._,._ 1•..._•,.. 2_21_v,_,_,_ __ OK• M 52 19 L
~
V
rf--
'
'
d
H~Y._ ;
d0116 ~
2
092'V
TPJ
VCC
I CONYER
i
~ -
ij ~I "~ l I ' I
4- -- +--
sLO.,,15,16 TL YI 23
•IDll-14 TLSl23
•LOIi-~ TLGl23A
_____ _ _ FC~ =-J =-i '
,--- ~_-_-_-_-_-_- __-:_-_- _ --_-- POWER~UPPLY~m:cor-c '-"
30
_4 ..c.. kH-,,J - r= , · ~ --_ -- _-- - 1, - - ~ ---- -~ J
,t1iSoftly Port
ll'it
(ll!IIJ rti: a"ff''"''po,1, reC0ll'!l!ltrdtd
Lfl, KI ,K1 + V bJ i•e M(l"1Jrac1~1t1
15
" "' "' - ~-+-+-<~+- - -0~"'-. · ,1 I
! I
l I
lt--~"--'--'-'l ll - 'FIXEDPARTS(p)7
I
I
I
I
I
I
I
I
I
I
I
·Design and spec: 1hcat 1ons sub1ect to change without notice f Of' improvement.
·La presention et les
sPQC ,h ca lt ons soot susce ptibt e.s d'~tre m och hees sa ns pre3vis par suites 1J1u1"' h o,11111n1 •vcmlu"llo
•Anderungen, dte dem t echnt~heo For tschntt d.e nP.n , bfe1ben vorbehalten.
Sw 11CH 6 U1 1n1
<IS2(L,RI ht df tt,IGCUI
dYR K>O
d'IRIOIL,R
dV R J02L,R
dVRt03l,R
dVAt06
dVRl()<e
dVAI05
CA PACITORS
811d 1 8to1 CANO. l Ad1 i.s l
NAffJtOW, S(PA Adpnt
WIO(, SlPA Adjt.111
I9k HJ P11o r CANCEL Adtvi1
19tHJ
0C A"'I) DC OHS[T A41ust
'V(O LP Mlp o<: ()ffS(T ACIJ11U
Art in µF, Un l en Olllf1• 1u Hold p:pf
• 8.cr,,er LO}er
.0. ~fOffltC
0 P<il)Styr t nt
9 FllffllM tlod
t> Mtroliztd Pope ,
8.P Bi·Po1t r £1ec1101111c
RESISTOAS
Alt in ohm1, 114 llii(I I IS. :t:54 /. To~l(lftet
Unltu 011\IOfi H Ni>lfd t'kQ, M wn
0 F'1111r.o lyl)t
'J Non-11\t•oml'l'lablt type
Enh DC v~,. it101 n 1h, nom1ao1
Valu,e ,n Volls al no it1P111 st~nol
Tt.t 'l'Ol to gt POltflllleSllt<:I 1nd , co1n
!ht ~l)l toq t- i1 11t1eo $111'101 r ectp 1 1on
I 01 JU·S77X, TU S607G
IAJ TU·S77AMX
Composite, Sub Channel &
L- ch Signal Li ne
Sub Channel &
R- ch Signal Line
HA 1 2412 01 lf40I6
LA 1245 M~21 IL
MSM 403011, II 40ll60P
MS M 4~20 NJMl496D
NJM14%IJ IA1i4/
NJ M 4M11.H> HU141J•
TC4011P
TC 4 02'11P
TC91 ti7P
T0630lAJ'
h t 113.Jil,, l1at
L7BN0b ouu,oe
I /8 N<l6 I,
l/BN 12
l 10N1b
L7BN14 \\ \\
2
c. n , .
lu KV1226
K trfa.-
JC IO
'""''
UO 1b2LH
11 l t
A1 U
,rni~rn
1S1588 tn
1S158TP-3 ~
1S2473T77
10E-2 SE L2210S
~
SEL2410E
.J. TLG 123 A
t TLS- 123
w
•
1
2 I
3
I
4
5

www.SteamPoweredRadio.Com
TU - S77AMX
A B C D
5-3. AM Stereo Section •Design
and spec1hcat1ons subteet to change w ithout notice for improveme nt.
•La presention et les spectficahons soot suscept1bles d'etre modlftees sans prt?av1s par suites cfamehorations eventuelles
•Andef'ungen, die dem technischen Fortschritt d1enen, bleiben vorbehalten.
I
I
I
I
I 1
I
I
I
I
I
I
:n
)>
(')
s:
~
r
►
5·
s:
(I)
!20
(/)
r
co·
(')
:,
~
e!.
►
!::
:,
s:
(I)
(/)
co · 2
:,
I
!!!.
r
5'
(I)
3
4
5