Panasonic RX-DT505 - Page 17

7 RX-DT505 RX-DT505
m SCHEMATIC DIAGRAM etunerico cIRUIT (Pars list on pages 67~73,)
1 2 3 4 5 6 7 8 9 10
A | TUNER CIRCUIT
aig
Qig
Q4
ey uae nat et 2SC33IIRTA
A
MUTING
OPTICAL PICKUP
3
So
Q18
Q20 ro)
RVTDTAI43XST
=
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SWITCHING
5
“ous
(ST
/
MONO)
cs2
el O18 (1) —
RVITA7358FT
it
FM
FRONT
END
©
MUTE
B
ty uch our
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— @ Ben Oe CIRCUIT(CS22)
R447 »(5. k en Saige ds b may 8} TUNER +8 | (Page 28)
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ai
oS
FM
IF
AMP
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reg
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RVTDTAI43XST
TELESCOPIC aelq! I: ic2 > POWER SUPPLY
ANTENNA so TABIZ2AFET ia
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I
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CPI
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a
(1)
TUNE
TRACKING
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hs
(2)
Ravio
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oe
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() 4.9V
Cc
ee
COIL
pao CNS Tofconnectoni;) 2 Pt
cis S/M CIRCUIT (CSI2)
R20
R
2
eax
RIOOGF
e
(Page
28)
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83x
cod
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PLL
CL
se
<2.1V>
03
|
38
abe
a
2SCI674LTA
ares
a8
3
Ia
e56
‘9
BUFFER
AMP
(8)
Pui
ce
=>
,
(FM
OSC)
ESELE
my rys
pa Q13,14 i ad Fa
2SC33IIRTA
Qi,
12
“ivy
Ql
esiy>
LW/
MW
SELECT
2SAIZO9ORTA (5.2v)
LW/MW SELECT
D
<5.1V QI2 <5.1v>
(5.2¥) (5.2V)
=a
6
Be ZX
=
Qs
RVTDTAI43XST
SWITCHING
(LW :ON)
ree r29
470 479.-~=« MAIGSTA
E
C69
M3300P
PLL
FREQUENCY
07.8
gs
SYNTHESIZER
¢23.—R2I : o> 3 =
S0VI
5.6K
2SC3311RTA
3
|
E
H FM/LW/ MW on
LOOP FILTER os 5
<a >
= e
Q9,10 3
2S8C331IRTA
OOK
tosw;
2
OC-DC CONVERTER
F
Notes:
<for
Tuner
circuit>
©CD
voltage
measurements
are
taken
with
electronics
voltmeter.
=>
:
FM
Signal
Line
emma
|
FM
OSC
Signal
Line
®No switches or VRs. The negative terminal of the battery provides negative meter connection point.
i
LW/MW
OSC
Signal
Line
aaa):
FM/LW/MW
Vcap
Control
Signal
Line
<for CD circuit> (__ )...LW/MW < >...FM ((__ ))...CD
eS701
:
Rest
switch.
‘
CD
Signal
Line
eVR701 : Best eye adjustment VR. eThis schematic diagram may be modified at any time with the development of new technology.
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