Denon DP-75 - Wiring Diagram; Component Replacements and Safety Notes; Measurement Guidelines Notes

DP-75
WIRING DIAGRAM
sraracusscans
Sneaelesnigeite SRS po tne bin EEL SCTE a
1.8mv L8ms
3mvy : L3ms
1. Voltages and waveforms, except (N) are measured against
| | | | i (OD) a camiaaat ai ne ! |
Ov
ae
®)
Sy
it
©
9M
Hi
fe
|
5,
©:
-
-
VV
iE
p-P
a
fe
ground
(chassis).
© | 7 } f s i —~L Ov Eerste Seay SARTRE : o. 2, Use acircuit tester with input impedance of more than 100
v . i | 8 14.4ms |
:
10.6
ms
;
KQ/V
.
3, Waveforms combined by brackets have same time axis.
1.5ms
NOTES B:
KU-350 SERVO CONTROL UNIT i
IC 1:HO7438 1c 2:TATIZZBPC).
33,45,STOP MEMORY,
HC 3:TA7I22 BP(C) ae 1C4=FS-7805M TR9= 2SD468(C)
DIRECTION
DETECTOR
AMP
~~
IREVERSEBROT,
DET.
5V
REGULATOR
~v
SEL3036
y)
RS
470k
Fi8
470k
ines
ae eer
ae
eee
‘
CN
2129077006
POWER SW
3
RVRSI
>)
i
srroed
45H
O
0.
|
Zz
mae
ie
ay
eV
3
&
——
a)
0.6
ra
LIMITER
oO
sa
POWER
MEMORY
|_|
ROTATION
DET.
STROBO
FLASH
O
:
TR7
=
280
468(C)
IC
5=HD7438
(Otherwise:
H)
TR6:
2SD486(C)
|
s
:
4
{
ons
a,
“e
PS-147
POWER
SUPPLY
U
KU-35!
QUARTZ
SERVO
UNIT
_
_
ae
;
aa,
TRIB
=
2SC2023Z
TRI4,
15:
2SA879(C)-R
IC.
2=
HAI7902P
,
FORWARD
cs
vsoi
COMPARATOR
b5ia5
AM-MODULATOR
——~—t
W
ga
;
4
v
TA
7I22BP
FS-
7805M
:
E
-40v
7
fs
t
Bole:
et
¥
eee
ee:
Stalled:
200
ni}
3
|
ee
Cy
Ley
13}
14)
(sy
16
1s
x
;
GND
Vec
be.
+
{
®
ie
¢
SG3!
2OA
iN
ue
ra
8
1.6¥
|
i
eae
c
i.
i
v
Lty
+
:
Kr.
e
!
\Stalled
S
:
'
\
5
:
:
.
oem
!
\
I
\
,
33,45
SELECT.
REVERSE
REV.
|
oa
ie
Low
PROHIBIT
)
co
Fv
Fy
Fv
e
:
i
Voo
IN
out
IN
S
‘c
Sur
OUT
S
3
:
OUT
IN
iv
REVERSE
AM-MODULATOR
nN
SIOW
High
i
.
|
TR20:2SCI162(C)
A\trig2scz0z3z_A\rair:28a879(¢)-R
“RIG=2SA999(F)or
2SAIOIS(Y)
_
TRIO=2SAQGRA(F)
or
2SAI0I5(Y)
_
__TRI2?2SA999(F)
or
2SAIOIS(Y)
2228245
|
NOTES
A:
©
o
|
WARNING:
ELECTRIC
SHOCK!
Do
not
touch
turntable
chassis
1.
All
transistors
are
2SC2320(E})
or
(F),
or
equivalent
unless
and
oscilloscope
at
same
time
while
observing
NOTE
_
specified.
|
”
waveform
(N)
.
1C’S
TOP
VIEW
SHOWN
2.
All
diodes
are
1$2076
or
equivalent
unless
specified.
.
|
A
3.
The
parts
with
A\
marks
have
special
characteristics
important
~
28C2023Z
2scii62(c)
Le\
ifi
repli
h
6
os
i
to
safety.
Only
specified
parts
can
replace
them.
TR
“) NEN
SEL3036
LNSIRP-HL
4,
The
parts
with *
marks
must
be
replaced
with
only
specified
5SC2520(F)
:
-VO6E
parts,
as
they
are
temperature
compensating
devices.
2$D468(C)
*E)
ewe
pone
a
ia
th
J
5.
All
resisters
are
in
Ohms
and
%W,
and
capacitors
are
in
uF
Sa
ecicr-a
|
E
iti
ote
:
ian
4
i
unless
specified.
P
is
pF.
See
.
aaern
2SAl0I5(Y)
eg
am
es
6.
This
wiring
diagram
shows
basic circuit,
and
is
subject
to
Cc
—ec8
+
yf
s
Ed
wee
‘
8
= Ss
:
modification
for
improvement.