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ステレオシステム Panasonic RX-CT900のPDF サービスマニュアルをオンラインで閲覧またはダウンロードできます。Panasonic RX-CT900 26 ページ。 Portable stereo component system
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RX-CT900
Ml PLAYBACK GAIN ALIGNMENT
EQUIPMENT
TEST TAPE
CONNECTION
ELECTRONIC
COUNTER
ADJUSTMENT
(Refer to Fig. 6.)
REMARKS
DECK 1 (Lch)...VR101
:
iy
QZZCFM
TP13 ee
(Reh)...VR201
1. Playback mode.
(315 Hz, 0 dB)
DECK 2 (Lch)...VR102
(Reh)... VR202
2. Adjust VR, for —11 dBV +0.5 dBV.
BGEEY..Rch
li BIAS OSCILLATION ALIGNMENT
EQUIPMENT
TEST POSITION
CONNECTION
ADJUSTMENT
REMARKS
ELECTRONIC
(Refer to Fig. 6.)
COUNTER
m@ RECORD/PLAYBACK LEVEL ALIGNMENT
EQUIPMENT
TEST TAPE
Ce Fecuic
ADJUSTMENT
REMARKS
eOUNTER
(Refer to Fig. 6.)
1. Insert test tape QZZCSZ in DECK 1 anda
blank tape.in DECK 2.
2. Set the unit to the dubbing mode at normal
*
speed.
QZZCFM
- (315 Hz, 0 dB)
Leh... VR103
Reh...VR203
. Short-circuit
[GX with solder.
. Inserttest tape QZZCSZ in DECK 1 anda
blank tape in DECK 2.
3. Set the unit to the dubbing mode at normal
speed.
4. Adjust VR103 and VR203, for AC
17 mV +0.5 mV.
@ TAPE SPEED ADJUSTMENT
EQUIPMENT CONNECTION
ELECTRONIC COUNTER
RADIUS MENT
peMani
If it doesn't repeat steps 1_and 2 above.
_ Editing is started by means of the Synchro-Start function.
8. Check be sure that the measured speed is at least 1.63 times faster than normal speed.
m@ ALIGNMENT POINT
Please refer to Circuit Board and Wiring Connection Diagram for test point locations.
— ep
—*
To Measuring
—e
Instrument
7
R=320
oa
:
Fig. 2
Fig. 3
TEST TAPE
VR501
(Shown in Fig..9.)
QZZCWAT
(3 kHz)
To Headphones
Fig. 1
~19-
RX-CT900
FM ANT
FM ANT
MWANT
SOMHz
IOGMHz
600kHz
459kHz
AM IFT
MW ANT
1400kHz
[es]
[et]
[Le-r]
[73 |
cT2
FM VCO
FM 2nd
FM
I19kHz+50Hz 1O.7MHz
10.7MHz
Ist
Mw OSC
520k Hz
LWANT
27 OkHz
MW OSC
I7IOkHz
De} Cre] [ee] [ee]. [ers]
Fig. 5
Electronic
Headphones jack volt meter
Ss
|
Playback "=e
=
mode
Electronic
volt meter
Fig. 7
Oscilloscope
MECHANISM CONTROL P.C.B.
Tape Speed
ay
Fig. 9
Recore
(Erde)
[vR302]
[vR303]
[vrio3}
[vr2os)_—[vrio!
FUNCTION OF IC TERMINALS
IC401 (UPD75306G073): MICROCOMPUTER
Rec bias
oscillator
Keep these cords short.
Fig. 8
BASIC
INTERVAL
TIMER
INTBT
110 /P13—e| TIMER/EVEN
Ptoo/rad~—|
COUNTER KY
INTTO
ae
[at
KS
INTW
LCD
ERIAL
S1/SBI/PLUD
CLOCKED
$0/$B0/PC2 +
$
=
SEK /P01 =—e} INTERFACE
INTCSt
into P10 }
INTI/PLIO—
intope I] interrupt
;
t 7] CONTROL
INTa EOD ——
KRO/
-KR7/P73 9
BIT SEQ. ae),
BUFFERUG6)
PROGRAM
COUNTER (13)
PROGRAM
MEMORY
(ROM)
6016x 8BITS
sie
OECODE
ANO
CONTROL
ean 'ae
ports Ka) P30- P33
DATA
MEMORY
(RAM)
512x 4BITS
[ 24),
$0~ $23
4 / BPO
ico
fe» %
ixt24
PLC /P22
SYSTEM CLOCK
Stee | CLOCK
[GENERATOR | STAND BY
CONTROL]
O'VIDERT
sug [main | CONTROL
OOOO
XTl
XT2 XI X2
cpu
CLOCK
Voo
VSS
RESET
| Port 2] PIO-PI3
PORT2 K @ ) P20- P23
pibveha
P63/KR3
P62/KR2
P6I/KRI
P6O/KRO
x2
iis porto Ka] POO - POS
=,
=,
P3i/SYNC
P3O/LCDCL
P23 /BUZ
~$31/8P7
PLI/INTI
P10/INTO
P03/S1/S81
"LLER
:
aaves [4 como-coms
K 3] Veco - Vec2
© BIAS
© LCDCL/P30
© SYNC / P31
Lco—-|
~20-