Sony MHC-D7 - Page 51

HCD-H881/H881D
1
6-16. SCHEMATIC DIAGRAM — AUDIO SECTION —
2 3
HP1O1
6 7
8
10
_
+2
1c614
1C611
e
IC
BLOCK
DIAGRAM
©
WAVEFORMS
-
AUDIO
SECTION
eavece
|
{
AUDIO
BOARD
]
os
HEAD
#PC4S70C~1
ae
PB
AMP
[B+]7.8
IC602
PC1330HA
eine
>
a
ne,
A
‘
2
+
i
C313
:
gd
ae
Ce
'
22
H
rN
C31tb
Ag
tév
L-CH
$30p77
1208
=
nit
ays
[PB
Leve
c]
H
z
i
R312
he
We
=>
t
B
BECK
A
H
i
rf
\
RVAIT
=
>
H
R414
130k
2.2k
PB
LEVEL
R
COMPARATOR
R-CH
|
~6.8
H
‘
8)
-—_0O-—_)
($)
2
$
=
§
€
$
F
B
=
:
vu
a
=
a
a
HRPE101
1c601
1C601
RECORB/PLAYBACK/
APCAS70C-1
RAO!
Ba:
Aap
:
ERASE
HEAD
220
EE
D
Pe
!
'
-cH!
tO)
EeChhity
e
Tit)
stcear
|
SR PB
LEVEL
L
eae
aie
S
H
H
a
'
‘
me
RRS
§30¢
Ls
1
4
cal
EM
AGS
Bar
1
'
6.
3¥-
'
i
@)
$800
Rage
oon
ceoz
|
Ry4p!
[PB
LEVEL
R]
ae
t
Cy
eS
i
E
R-CH
|
T°
Vann
+
TOK
tv
oa
ss
re
Y
i
2
H
ee
—
7.8
'
!
C405
‘an
H
'
1C601
22u
16
)
'
'
PPCAS7OC-|
'
I
B=]l__.
'
'
Wy
-7.8
F
'
'
A608
Pu
ua
1C602
Ba}
7-8
'
!
1¢g02
!
'
#PCT330HA
©
REC/PB
'
'
SWITCH
it
H
H
Hl
H
i
Hl
'
Hl
H
H
'
!
G
BECK
B
!
'
'
H
i
i
ot
C331
'
'
"20
H
H
Mr
'
H
(N
R609
22k
27-8
bas
AaB
Note
:
'
'
Yaa
;
'
'
i
LL
cae
I
-
All
capacitors
are
in
F
unless
otherwise
noted.
pF:
yw
wp
F
'
'
|
Tea
50WV
or
less
are
not
indicated
except
for
electrolytics
and
H
H
'
fm
H
tantalums.
'
'
=
432
+
All
resistors
are
in
Q
and
%4W
or
less
unless
otherwise
'
;
L434
specified.
'
'
t
<a
lb
Spa
!
:
.
H
a
623
pel
2k
:
:
B+
Line
;
BIAS
ON/OFF 431
P
i
'
SWITCH
aie
120p
.
:B-
Line
'
'
2981387
.
,
I
'
:
-7.8.(1)
.
C_]
:
adjustment
for
repair.
H
'
ear
,
.
H
i
%
+
Voltage
and
waveforms
are
dc
with
respect
to
ground
under
'
;
Sesh
tev
no-signal
conditions.
t
!
1
H
'
no
mark
:
PLAY
(TC)
H
g
ae
“ei
'
'
10K
¢
)
:
REC
'
'
S
Chee
*.
.
'
+
m:
+
Voltages
are
taken
with
a
VOM
(
Input
impedance
10M
©
).
J
'
§
l
Voltage
variations
may
be
noted
due
to
normal
production
'
'
dy
'
i
tolerances.
:
: t
xX
it
-
Waveforms
are
taken
with
a
oscilloscope.
'
i
Ea]
Voltage
variations
may
be
noted
due
to
normal
production
'
H
-7.8
i
tolerances.
H
H
I
+
Circled
numbers
refer
to
waveforms.
'
'
\
i
+
Signal
path.
K
'
ac
H
'
>>
:
PB(DECKA)
Xn
et
[>
:PB(DECKB)
l
(>:
REC
(
DECK
B)
l
lL
Bre
ese
Se
es
Of
=
CN602