Technics RS-DV250 Service Manual

FW901
OPERATION CIRCUIT
E
1
2
3
4
5
6
7
8
D907
SML79455C
(
)
Q901
DTA143EUT106
LED DRIVE
D905
SML79455C
(
)
Q902
DTC143EUT106
LED DRIVE
S907
( )
S906
( )
S905
(
DOLBY NR
)
S904
(
REC PAUSE
)
S903
(
TAPE EDIT
)
S901
(
OPEN
)
S900
(
)
S915
(
OPEN
)
S909
(
)
S910
(
)
S912
(
DECK 1/2
)
S911
(
REV MODE
)
S914
(
COUNTER
RESET
)
S913
(
COUNTER
DISPLAY
)
R911
2.2K
R910
1.8K
R909
1.5K
R908
1.2K
R925
1K
R924
820
R905
2.2K
R904
1.8K
R903
1.5K
R902
1.2K
R901
1K
R906
3.3K
R900
820
R915
680
R914
330
R916
330
Q904
DTC143EUT106
LED DRIVE
Q903
DTC143EUT106
LED DRIVE
R917
680
D904
MA111TX
IC202
MC14066BFEL
SIGNAL CONT.
8 9 10 11 12 13
7 6 5 4 3 2 1
14
MAIN CIRCUIT
A
A
B
C
D
E
F
G
Q108
DTC143EUT106
SWITCHING
R126
22K
R234
100
C216
16V10
C215
16V10
R233
100
R226
47K
R208
47K
R225
47K
R207
47K
:POSITIVE VOLTAGE LINE
5V
5V
0V
5V
0V
0V
STOP :0V
5V
4.2V
0V
0V
0V
2.6V
0V
4.7V 8.3V
(0V)
9.6V4.7V 4.7V 4.7V
8.3V
(0V)
8.3V (0V)
(5V) 0V
9.6V
:PLAYBACK SIGNAL LINE

Technics RS-DV250 Specifications

General

Brand	Technics
Model	RS-DV250
Category	Cassette Player
Language	English