Panasonic RX-CT900 - Schematic Diagrams; Operation Circuit Schematic

RX-CT900
RX-CT900
SCHEMATIC DIAGRAM (for operation circuit) (Parts list on page 22~28.)
Notes:
1. S1-1~S1-7: Record/Playback switch in “PLAYBACK” position. 35. VR1: FM VCO adjustment VR.
(P...PLAYBACK, R...RECORD) 36. VR101: Deck 1 playback gain adjustment VR (Lch).
AL
OPERATION
SWITCH
CIRCUIT
2.
S2-1~S2-3:
Function
select
switch
in
“TAPE”
position.
37.
VR102:
Deck
2
playback
gain
adjustment
VR
(Lch).
(T... TAPE, R... TUNER, A...[CD/AUX) 38. VR103: Record level adjustment VR (Lch).
3.
S3:
Editing/FM
mode/Beat
proof
switch.
39.
VR111:
Graphic
equalizer
control
(100
Hz)/XBS
level
control
Oe
oe
ee
ved
Sais
air
iwie
Sani
S3-1;
Editing
mode
switch
in
“MIC”
position
VR
(Lch).
ema
(Men
2
(Mem
6)
(Mem
51
(Adina
isteep)
(ner)
(Royer)
blay
ssid
:
(M...MIC,
N...NORMAL
SPEED,
40.
VR112:
Graphic
equalizer
control
VR
(330
Hz,
Leh).
ey
oye
Bela
1
H...HIGH
SPEED)
41.
VR113:
Graphic
equalizer
control
VR
(1
kHz,
Lch).
rye
Pagan]
so]
$3-2;
FM
mode/Beat
proof
switch
in
42.
VR114:
Graphic
equalizer
control
VR
(3.3
kHz,
Lch).
Men
As
{on
Time)
i
com
“STEREO/!’
position.
43.
VR115:
Graphic
equalizer
control
VR
(10
kHz,
Lch).
cal
at
al
ryoissidara
ian
(S/I...STEREO/I,
S/HE...STEREO/#1,
M/
44.
VR116:
Volume
control
VR
(Lch).
oa
i
ae
J
HEL...
MONO/HED
45.
VR201:
Deck
1
playback
gain
adjustment
VR
(Rch).
(disploy)
|
sMemory)
|
(M.scon
4
4.
S4:
Deck
1
tape
select
switch
in
“NORMAL”
position.
46.
VR202:
Deck
2
playback
gain
adjustment
VR
(Rech).
oy
oS
ial
avenge
sara
(N...NORMAL,
Cr...[METAL]/CrO2)
47.
VR203:
Record
level
adjustment
VR
(Reh).
,
a
‘
D410
5.
S5-1~S5-2:
Deck
2
tape
select
switch
in
“NORMAL”
position.
48.
VR211:
Graphic
equalizer
control
(100
Hz)/XBS
level
control
:
t
4
h
cae
OPERATION
(N...NORMAL,
Cr...
[METAL]/CrOz)
VR
(Reh).
ee
6.
S6:
Dolby
NR
switch
in
“OFF”
position.
49.
VR212:
Graphic
equalizer
control
VR
(330
Hz,
Reh).
Dat
fo
.
7.
S7-1,S7-2:
XBS
switch
in
“OFF”
position.
50.
VR213:
Graphic
equalizer
control
VR
(1
kHz,
Reh).
as
AC
CONNECTION
INO.
8.
S8:
Mic
switch.
51.
VR214:
Graphic
equalizer
control
VR
(3.3
kHz,
Rh).
Baeergn
“i
Sv
eyolssiaaTa
ae
:
9.
SO:
Deck
1
play
switch.
52.
VR215:
Graphic
equalizer
control
VR
(10
kHz,
Rh).
RESET
--
OV
avorsstssra
Te.
al
pags
i
cr4oz
10.
S10:
Deck
1
motor
switch.
53.
VR216:
Volume
control
VR
(Reh).
\
se
ae
Q
CD
stanay
i
14:
S11:
Deck
2
motor
switch.
54.
VR302:
Record
bias
(CrOz)
adjustment
VR.
[ea
eRe
as
Dicey
TO
romen
our
12.
$12:
AC/DC
select
switch
in
“AC”
position.
55.
VR303:
Record
bias
(Normal)
adjustment
VR.
1C402
Rr
be
4)
—
13.
S401:
Station
memory
switch
(8).
56.
VR304:
Balance
control
VR.
4
TT
@)
rato
14.
S402:
Station
memory
switch
(4).
57.
VR501:
Tape
speed
adjustment
VR.
s
PA
©)
earrery
15.
S403:
MW
switch.
58.
DC
voltage
measurements
are
taken
with
electronics
voltmeter.
2
agv
a8
ao-386
©)
~
se
Bhuain
16.
S404:
Station
memory
switch
(7).
The
negative
terminal
of
the
battery
provides
negative
meter
3
aos
VR
UP
|
cesaoe)
17.
S405:
Station
memory
switch
(3).
connection
point.
8
qaio
3308
OY
**
18.
S406:
LW
switch.
No
mark...PLAYBACK,[
]...RECORD,(
)...AM,<
>...-M
3s
TO)
V8
own
19.
$407:
Station
memory
switch
(6).
<
»...HIGH
SPEED
eae
20.
S408:
Station
memory
switch
(2).
59.
Battery
Currect:
Vol.min.............
200
mA
(Tape
Playback)
Ors
21.
$409:
FM2
switch.
Wolo
(aie
«hoes
as
haceiGipel
eee
hier
ces
1450
mA
(Radio)
one
22.
S410:
Station
memory
switch
(5).
1500
mA
(Tape
Playback)
23.
S411:
Station
memory
switch
(1).
Measurement
instruction
24.
$412:
FM1
switch.
Radio:
FM
60
dB,
30%
Mo)
25.
S413:
Adjust
switch.
Tape:
315
Hz,0dB
oe
i
26.
S414:
Tuning/Time
set
switch
(—).
60.
The
mark
(MM)
shows
test
point
e.g.
=test
point
1.
Fa
27.
S415:
Sleep
switch.
61.
Important
safety
notice.
Ge
28.
S416:
Tuning/Time
set
switch
(+).
Components
identified
by
A\
mark
have
special
characteristics
srenes
i
29.
S417:
Display
switch.
important
for
safety.
@isione
1,
ain
30.
S418:
Timer
switch.
When
repiacing
any
of
these
components,
use
oniy
manufacturer's
1c401 e —4) ctock CIRCUIT 31. $419: On-time switch. specified parts.
Gite sees 32. $420: Memory switch.
wuTe $3. S421: Operation switch.
GND : 34. $422: Memory scan switch.
h
\ ew stereo R406!
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®This schematic diagram may be modified at any time with the development of new technology.
cc: FM SIGNAL LINE mm): AM SIGNAL LINE E>: FM OSC SIGNAL LINE
E
| i
|
iStesoacors
Zp:
AMOSC
SIGNAL
LINE
sa:
PLAYBACK
SIGNAL
LINE
Sangriy
eer
ee
singe
con
i:
MIC
SIGNAL
LINE
10:
RECORD
SIGNAL
LINE
>:
MAIN
SIGNAL
LINE
expe:
+B
LINE
F
L040! (LDBU93974AZ)