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2. T o in it ia liz e th e u nit
T his d evic e e m plo ys a m ic ro pro ce sso r to p erfo rm v a rio us
fu nctio ns a nd o pera tio ns. If in te rfe re nce g enera te d b y a n e xte rn al
p ow er s u pply , r a dio w ave , o r o th er e le ctr ic a l s o urc e r e su lt s in
accid ent w hic h c a use s th e s p ecif ie d o pera tio ns a nd fu nctio ns to
o pera te a bnorm all y .
T o p erfo rm a r e su lt , p le ase fo llo w th e p ro ce dure b elo w .
1.S et th e u nit to th e s ta ndby m ode
2.P re ss a nd h old d ow n th e M EM ORY b u tto n, th en p re ss th e
D IS PLA Y b u tto n.
3.T he s e gm ents o f th e F .L .tu be lig ht o n a nd th e u nit is s e t to th e
te st m ode.
4 .'C le ar' is d is p la ye d w hen th e p ow er s w it c h is p re sse d in th e
s ta te o f th e te st m ode a nd th e m em ory is c le are d.
1. R epla cin g th e fu se
T his s ym bol lo ca te d n ear th e fu se s in dic a te s th at t h e
fu se u se d is fa st o pera tin g ty p e. F or c o ntin u ed p ro te ctio n a gain st
fir e h aza rd , r e pla ce w it h s a m e ty p e fu se . F or fu se r a tin g r e fe r to
th e m ark in g a dja ce nt to th e s ym bol.
C e s ym bole in diq ue q ue le fu sib le u tlis e e st a r a pid e.
P our u ne p ro te ctio n p erm anente , n 'u ntilis e r q ue fu sib le s d e
m em e ty p e. C e d arn ie r e st la q u le p re se nt s ym bol e st
a ppse .
C IR C UIT N O . P A R T N O . D ESC R IP TIO N
F901 252075 2.5 A -S E-E AK,F use
F M
Tunin g R ange:
87.9 0 - 1 07.9 0 M Hz, 2 00 k H z s te ps ( U .S . & C anadia n m odels )8 7.5 0 - 1 08.0 0 M Hz, 5 0 k H z s te ps ( O hte r a r ea m odels )
U sa ble S ensit iv it y :
M ono : 1 2.8 d B f 1 .2 µ V , 7 5 O hm s IH F Ste r eo: 1 9.2 d B f 2 .5 µ V , 7 5 O hm s IH F
50dB Q uie tin g S ensit iv it y :
M ono : 1 8.0 d B f 2 .2 µ V , 7 5 O hm s Ste r eo: 3 8.0 d B f 2 2 µ V , 7 5 O hm s
Captu r e R atio : 1 .5 d B
Im age R eje ctio n R atio : 8 5 d B
IF R eje ctio n R atio : 9 0 d B
S ig nal- to -N ois e R atio : M ono: 7 3 d B IH F
Ste r eo: 6 6 d B IH F
Sele ctiv it y : 5 0 d B D IN ( ± 300 k H z, 4 0 k H z d ev .)
A M S uppr essio n R atio : 5 0 d B
Tota l H ar m onic D is to rtio n : M ono: 0 .5 %
S te r eo: 0 .8 %
F requency R esp onse : 3 0 - 1 5,0 00 H z ( ± 1.5 d B )
Ste r eo S epara tio n : 4 0 d B a t 1 k H z
30 d B a t 7 0 - D 1 0,0 00 H z
O utp ut L eve l : 0 .5 V ( U .S .& C anadia n m odels )
0 .7 5 V ( O th er a r ea m odels )
M utin g L eve l : 1 7.2 d B f 2 .0 µ V , 7 5 O hm s
AM
Tunin g R ange :
5 30 - 1 ,7 10 k H z, 1 0 k H z s te ps
U sa ble S ensit iv it y : 3 0 µ V
Im ag e R eje ctio n R atio : 3 0 d B
IF R eje ctio n R atio : 4 0 d B
S ig na l- to -N ois e R atio : 4 0 d B
Tota l H arm on ic D is to rtio n : 0 .8 %
O utp ut L eve l: 0 .1 5 V
G enera l
P ow er S up ply :
A C 1 20 V , 6 0 H z
AC 2 30 -2 40 V , 5 0 H z
Pow er C onsu m ptio n : 9 W
D im ensio ns ( W x H x D ) :
2 05 x 7 6 x 2 79 m m
8-1 /1 6" x 3 " x 1 1"
Weig ht : 1 .7 k g , 3 .7 lb s.
A M r e ce ptio n is a va il a b le o nly o n t h e U .S . a nd C an adia n m odels .
S pe cif ic a tio ns a nd e xte r nal a p pea ra n ce a r e s u bje ct to c h ange w it h out n o tic e a s a r e su lt o f p r o duct im pr ovem ent.
S PEC IF IC ATIO NS
SER VIC E P R O CED URES
T-4 05T X
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BLOCK DIAGRAM
FMANTENNA
TA N K
CIRCUIT TR1
RF AMP TR2
MIXERIFT
Q101.Q102
FM IF AMP L101.L102
FM IF
TRANSFORMER
Q103
FM IF SYSTEM/MPX AND AM RADIO SYSTEM
LA1837L103
L.P.F
Q105
MUTE
SWITCH
Q107
GATE
CIRCUIT
Q106
MUTE
SWITCH
L104
L.P.F TR3
BUFFER TR4
FM LOCAL
OSCILLATOR
Q174
FM+B
SWITCH
Q701
PLL SYNCHESIZER
AND CONTROLLER
LM7001 Q702.Q703
L.P.F
X701
7.2MHz
RESONATORQ901
REGLATOR
Q902
REGLATORT901
NPT-1102
P902
X751
4.19MHz
RESONATOR Q753
RESET
Q752
F L TUBE
10-BT-167GK Q754
BUFFER49 SYS
OUT
46 SYS IN RI
IN/OUT
DIDIGT
SEGMENT
41 DATA
40 CLK
39 PLL
23 SD 22 STEREO
24 SIG 17
34
35
27 28
12V
5.6V
-VP
F L TUBERight
Left
19 MUTE
54312 15118 FM
9
10
7 1921 19
17
16
18 20 30 15
14 11
7 6
MUTE OUT
STEREO
SIGNAL
AUTO/MONO
R101
FM MUTE
LEVEL TUNED
CIRCUIT
T-405TX
