Marantz 3800 - Page 48

ERR at Hean En i Z. ®
Model 3800 Preamplifier
Schematic Diagram
oe
PHONO
/
MIC
AMPLIFIER
eae
|
eo
DOLBY
NO
TO
R210
TO
R236
173VREG
C)
RTCHAN
=
RT
CHAN
{
Te
(09
(8)
(09)
*
RECORD
LEVEL
c
R310
J
58
1
oe
le
eS
oS
f
a7
Rast
WW
C215,
.03
R21,
22
+17.3V
REG
=
100K
25K
O
19
4B
Ss
MICROPHONE
=
R233.
tt7avreg
=o)
$601.2
2
=
J109
TAPE
REC-EQ
c201
ak
J108
|
too(1014
]
4.1125
4.
‘
saat
fT]
P505
PS04
/
100(100)
|
ofan
oe
—
7
$s
R201
150
se
C22:
1
7K
i
QO;
@®
4.7!
Sp239
Cy
@
25
b
ets
|
J60t
ag
O
=
0209
i
®
2N4250
O!
OF
1
4.5K
0207
R237
cee
$601.1
id
R557
1
(7p)
©
‘ene
sig
MPSHO4
22
.
150
I
EF
Co
O
DEFEAT
0!
5
5201S:
TUNER.
213)
41000
PF,
©2201
47.3
;
a
0
QO
Bla
5%
+03
REG
ee
as
KR
2
—
~
R213
R217
=
5B
88
O
!
oe
$201-4
AUX
§&
680
2.
C217
an
pti
t
25
R227,
91K
3600
PF,
5%
zi
EB
O
!
{
aE
Ea
7
R223
C219
L
|
ea
zow'
kee?
Ae
s601
[64(62)
107(106)
toaltosy
<
R603
=
;
2
=
p505
(64(62)
107(106)
104108)
>
159
was
O-~
TO
R604
d
RT
CHAN
@
'
p203
ee
[zatza
|
3102
;
4
seca
ify
14 6719.17 60
fii
14 5719 17 60
P217 (P214)
J15 (416)
et Se: eon, ak eet ie, Rasy scp ee ee,
O 318
O als
i 2 ::
”n
TAPE
1
3
$502
-
4F
be sais (OH Ele
2
:
-
eS
ee
TAPE
2
s
543
S
4415
3
Lt
L
220
PF
SG mz <4’
SCOPE z $501-2 ~ <{93(89) 94(90)85(86) |, J801 TIM E DELAY RELAY CIRCUIT eee
4417
RT
(RIB
(93/89)
94(90)
85(86)/
P5O7
TO
RT
CHAN
f
=
ae
ee
a
J420,
3422
Q)
@
@
1
J419
gs
3s
SOURCE
a)
(9)
28
Ss
1
©
2
FILTERS
Od
|
yu @ — cor Os
PREAMPL Hl 5KHZO =e 5
Gy! $202-2 (4) D @)
S
a
O5O
i
ai
ee
8501-3
“S|
oO
s
>
aa
TAFE
MONITOR
9
KHZ
DOLBY
al
TURNOVER
$202-3
$502-
4B
s
250nz
QD
|
= $202.5
R103, 2K BALANCE s3 GB
ge 7a $202-4
3s +17.3V REG
R108
R243
ry
(233
)
R267
J102
:
50K
@
10
P203
MAIN 12K c227| stor 2000PF R253
SPEAKER
SWITCHING
$2-1
=
ey
ac
=
ws
INPUTS
VOLUME
L\
0225
c
57.
R289
2
199
TBI
TO
RT
CHAN
‘
107
|
Js
41/25
;
03
T
75K
20K
R
R104
l
50K
=
=
9213
ats
SPEAKERS
|
ie
+
021
Paes me 2 ce Opa 2N42
5 180K Coat
a REMOTE 3 22/2
MAIN
SPEAKER
$2
_
2.7K
af
=
;
OUTPUTS
2
'
=
?
LOUDNESS
TB2 STEREO REVERSE © | $202-1 R3
R STEREO O | 12
RIGHTO SL! u201
tert O ~J F749 PC
$101-3
R295
E
MODE
100
REMOTE SPEAKER 1A 12 See 28
OUTPUTS F?
TB3
fi
03
an
pee
fe: -17.3V REG
Pins 1,(13) - 0.01V Pins 5, (9) ~0.01V [_ | |
Pins 2, (12) - 15.4V Pins 6,(8) -0.01V TIMES TEN AMPLIFIER FILTER AMPLIFIER
Pins 3, (11) 13.8V Pin7 -17.3V
R1 330, 1W Pins 4, (10) 13.8V Pin 14 17.3V
PHONES
J7
NOTES, UNLESS SPECIFIED:
VOLTAGE MEASUREMENTS GENERAL
1. All voltages are representative of those measured on a typical unit while maintaining a line input voltage of 120 VAC RESISTORS IN OHMS, 1/4W, 5%.
i +L
Poanleteretcycon
t
chess
sound,
CAPACITORS
IN
MFD,
10%.
POLARIZED
CAPACITORS
ARE
ELECTROLYTICS
7.
2. Unless otherwise noted, all DC voltage measurements obtained under the following conditions: THIS SCHEMATIC SHOWS LEFT CHANNEL ONLY.
A. No signal applied, input jack shorted.
B. All controls in mid-position.
C. MODE switch in STEREO.
D. TAPE MONITOR switch in SOURCE.
NUMBERS
IN
PARENTHESIS
ARE
FOR
RIGHT
CHANNEL.
LEFT
CHANNEL
REFERENCE
DESIGNATIONS
FOR
CAPACITORS,
RESISTORS
AND
SEMICON
RIGHT
CHANNEL
REFERENCE
DESIGNATIONS
FOR
THESE
PARTS
ARE
NEXT
HIGHER
EVE
3. All AC voltages are expressed in RMS and obtained under the following conditions: COMPONENT OR CIRCUIT COMMON TO BOTH CHINES
OIG e+e »-
A. 1mV input signal @ 1kHz applied to PHONO 1 input.
B.
PLAY
CAL
controls
adjusted
for
“0”
Dolby
level
on
the
Dolby
Level
Meter.
ALL
PUSHBUTTON
SWITCHES
EXCEPT
PHONO
1
ARE
SHOWN
IN
NORMALLY
OUT
POSITION
C. VOLUME control adjusted to obtain 1V signal output. _
S
Ries
eae
LJ.
SWITCHES
$201-1
THROUGH
$201-4
ARE
INTERLOCKING.
F. MODE switch in STEREO. > Y
G.
TAPE
MONITOR
switch
in
SOURCE.
hj)
ALL
ROTARY
SWITCHES
SHOWN
IN
FULL
CCW
POSITION
(
SEE
DETAIL
FOR
DOLBY
SWIT
/A\
Denotes
DC
voltage
obtained
under
conditions
as
described
in
NOTE
3
above.
10.
CAPACITOR
C565
WAS
22/25
IN
UNITS
3725
AND
LOWER.