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Technics SL-HD501 - Page 21

Technics SL-HD501
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SL-HD301
/
SL-HD501
SCHEMATIC
DIAGRAM-4
pe
POSITIVE
VOLTAGE
LINE
D478
MA111TX
R478
2.2K
hae
i
¥
War
5V
(OV)
2
al
is}
HOLD
@)
LED
PLAY
(=)
LED
stop
(=)
WEY
pasy
eek
4
avaay
|
sack
(jE
GATE
(a)
OV
(2.7V)
SUBQ
(at
Vy
SVRST
-
STR2
(W)
Ss
e
g
D
oO
a
NM
te
F=4.19MHz
5V
AV
a9
B
|
1
(0.2V)
OV
(id)
MDATA
SPEED
R498,
,
4.7K
(is)
TEST
KEY?
Gd<¥__]
eee
(16)
Vss
1C403
KEY1
(17)
OSCc1
LC66358C4K97
KEYO
SYSTEM
CONTROL
PLAY
V.
Ge)
ov
ze
G3)
V
Vv
5’
Gi)
5'
R470,
10K
S'
R480,
10K
ee
x401
(4.19MH2)
R440
1K
D410
MA11TX
Pp
Q401,403
2SC4081STX
INTERFACE
R423
4.7K
Q402
DTC143EUT106
INTERFACE
Cty)
Too
ton
MATT
TX
q
D
ov
1.5V
fA
CH)
Q411
DTC143EUT106
SWITCHING
21

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