Technics SL-HD505, Service Manual

Page: 22 / 35

R498
4.7K
L406
C
A
R420
4.7K
A
B
25 26 27 28 29 30 31 32 33 34 35 36
CLKSPD CS REQ DTI DTO NC CLK DISPLED CLOSE OPEN CLOSE
SW
OPEN SW
24
23
22
21
20
19
18
17
16
15
14
13 /MLD
MDATA
TEST
V
SS
OSC1
NC
NC
OSC2
/RST
MCLK
CHKMODE
CLKCNT 37
38
39
40
41
42
43
44
45
46
47
48
REST SW
STAT
V
DD
CDUNIT
MODEL
NC
NC
KEY0
KEY1
KEY2
SPEED
STR0
1 2 3 4 5 6 7 8 9 10 11 12
STR1 STR2
SVRST
SUBQ
GA
TE
NC
SQCK
BLKCK
DQSY
LED
STOP
LED
PLA
Y
HOLD
IC403
LC66358C4K97
SYSTEM CONTROL
10K
4.7K
4.7K
4.7K
4.7K
4.7K
F E H G
I
R416
10K
A
B
C
R415
1M
R403
1K
3 1
X401
(4.19MHz)
2
R433
4.7K
Q413
DTC143EUT106
LED DRIVE
Q411
DTC143EUT106
SWITCHING
Q414
2SB956RTX
LED DRIVE
R421
10K
R422
68
D403
MA28TATX
Q412
DTA143XUT106
LED DRIVE
R423
4.7K
R439
100
R470 10K
R410 10K
R409 10K
B A D
H
R406
10K
Q401,403
2SC4081STX
INTERFACE
C403
6.3V100
D
C
E
B
F
A
F
R405
10K
R407
22K
R440
1K
R458
1K
R428
10K
Q401
Q403
D409
MA111TX
D410
MA111TX
B
C
D
R427
4.7K
Q402
DTC143EUT106
INTERFACE
D411
MA111TX
4.7K
4.7K
R480 10K
D420
MA728TX
C
A
D
R479
2.7K
R478
2.2K
R474
3.9K
D478
MA111TX
R475
2.7K
R476
2.7K
R477
2.7K
5V
3.4V
7.8V
C402 0.1
SCHEMATIC DIAGRAM 4
L409
1 H
5V
3.4V
7.8V
0V
3.4V
5V
5V
5V
5V
5V
0V (5V)
0V
5V 0V 5V 5V 5V
1.9V 0.5V 1.6V 2.2V
2V
1.5V
3.4V
0V
2.4V
2.5V
4.9V
3.4V
5V
0V 4.8V 3.4V 0V 4.8V 0V 5V 0V 5V 5V
(2.7V)
(4.2V)
(5V) (0V)
1.6V
0.5V
0.7V
0.3V
0.5V
0.5V
0V
15.5V
14.9V
0V
14.8V
0V
1.5V
0V
5V
5V
3V
P P
F=4.19MHz
4.2V
P P
F=4.19MHz
PLAY
0V
5V
T 20ms.
PLAY
3.3V
0V
T 13.3ms.
5V
0V
T 20ms.
PLAY
0V
5V
F=75Hz
PLAY
0V
5V
T 26.6ms.
:POSITIVE VOLTAGE LINE
SL-
SL- SL-
SL-HD50
HD50 HD50
HD505
5 5
5
22