Marantz 3800 - Page 49

DOLBY NOISE REDUCTION |
u501 MODEL 3800 EXPORT ONLY
-17.3VREG C) as NE545B
von Loe} ae + 220V VERSION SHOWN
cst =
LEVEL
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{98
7
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tl
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535
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pso7 {98 | [ 133 | 701
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PF -47 dB -19 4B + A705
2
ENCODE/DECODE
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'
0035 VI BOTTOM VIEW RED/WHT
sop 553,510 | | (,0035 V) (.086 v) aaMniTace ; ( ) : TO P208
=
Bn da 6 2 15 413 noes : fl 400 Hz TONE Pin 1 -7.1V : iop209
vow + indy 7 | OSCILLATOR rine wen
16 =Lso1 TRAP) ——10/ Bel? | Pin 3 -6.9V TO P510
36 MH +) 16 r fee | 150K | Pin 4 -7.1V
}
C515
\
Pin
5
-6.6V
[ Poa I Pin 6 -7.1V ea
[ 51113000 PF \ Pin 7 -8.0V TOSESY
] 3900 PF 5% ' Pin 8 - 6.0V
] 5% =
{ = Pin 9 -17.3V
Pin 10 - 6.0V
R513 < F506 |(138) b Pin 11 — 5.0V
am
S
3701
((135)
|
Pin
12
~16.6V
] — Pin 13 ~ 16.6V
| = Pin 14 -16.6V
=a Pin 15 - 16.6V
| glee |_| Pin 16 ov
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| RRISS
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en : 4002 TONE (—- Y- -L- -[- -C
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| = RO DOOD DOOD U503 MODEL 3800 EXPORT ONLY
|
3
Sen
Be
NE543B
100V VERSION SHOWN
TO RT CHAN
TO RT CHAN
C545, 10/16
200
2N5210
U503 :
NE545B
DECODE
RED
{ BOTTOM VIEW ) FO Ee0?
REDMWHT
TO P208
Pin 1 -9.8V
14 ‘
Pin
2
10.0v
TO
P209
Pin3 no connection
Pin 4 -17.5V TO P510
DOLBY LEVEL BRS aay
METER CIRCUIT Pin 6 10.0V
| | Pin 7 9.3V .
Pin 8 10.9V : TO.R511
Pind ov
C561
C551 C555 Pin 10 10.9V
5600 PF
0.33 0.1 .027,5% a matt ay
R547 Pin 12 .63V
820 Pin 13 .63V
Pin 14 .53V
Rsa9 Pin 15 .53V
ale
10K
Pin
16
17.3V
7
= =e
Ble =
s al TURNOVER i - ro
ee 012 OO OGD
=|= $202-5 [4 HIBVREG — -17.3V REG
s\s |_| BOOST ~¢—— CUT O O 23
BASS
25
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47K
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281 C285 2
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$502
+ 03 = .03
<f» Pin ~15.8V
ery Pin 2 ov DETAIL FOR DOLBY SW
Pin 3 ov
|| PMSHIAG, Pin 4 ~17.3V
Pin 5 no connection
ia Pin 6 ov
P203 (P204) Pin 7 17.3V
J102 (4103) eae oe Pin 8 ~ 0.56V
RII5 56PF
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9.1K 10K '
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TURNOVER ! El !
4KHz OQ _O ! 1
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TONE AMPLIFIER 1 : 1
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S102
S103
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I +17.3V REG |
1 |
| wi |
t Ac LINE 295 |
120V 60H: 100/25 I
SISTORS
AND
SEMICONDUCTORS
ARE
ODD
NUMBERS.
es
|
\RE NEXT HIGHER EVEN NUMBERS. Cash ere aiaian RC 4194
1
24.VAC
4
c296
|
' f RED 100/25 i
2 c292 '
IRMALLY OUT POSITION. ' a7oi4e AVIVREG |
\
R312
15/100
\
| [29.9 R313 R314 !
715K, 43K = 1
eee NUNREG +1% + 2% |
TAIL
FOR
DOLBY
SWITCH
).
|
POWER
SUPPLY
CIRCUIT
Figure 3-9 Schematic Diagram
3-17