NAD 3030 User manual

SERVICE MANUAL
NAD
3030
AMPLIFIER
CONTENTS
SPECIFICATION
PAGE
2
ALIGNMENT
PAGE
3,
4,5
INSIDE
VIEW
OF
UNIT
PAGE
6
PARTS
LOCATION
OF
PCB
PAGE
7
WIRING
DIAGRAM
PAGE
8
CIRCUIT
DIAGRAM
PAGE
9
PARTS
LIST
PAGE
10

SPECIFICATION
*
Measurements
identified
by
an
asterisk
are
taken
in
accordance
with
the
new
IHF
A-202
amplifier
measurement
standard.
Power Amplifier Section
*
Continuous
average
power
output
at
8
ohms
20—20K
Hz
both
channel
driven
Rated distortion, 20—20K Hz
* Clipping headroom at 8 ohms
Clipping power at 8 ohms
at 4 ohms
at 2 ohms
Dynamic headroom _at 8 ohms
Dynamic power at 8 ohms
at 4 ohms
at 2 ohms
* Reactive load rating
* Transient Overload Recovery Time
* Slew Factor
Slew Rate
Damping factor at 50 Hz (Ref. 8 ohms)
T.H.D, 20—20K Hz From 250 mW to 30 W
S.M.P.T.E. I.M.D. (60 Hz + 7KHz, 4:1) From 250mW to 30W
LH.F. ILM.D.(19KHz + 20KHz) at 30W
T.I.M. (15KHz Sine + 3.18KHz Square Wave) at 30W
Frequency Response, 20—20K HZ
Frequency Response Range + 3dB
Preamplifier Section
* Input Impedance Resistance/Capacitance
Input Sensitivity (1 KHz) * For] watt out
30 Watt out
Input Overload at 1KHz
20 Hz
20 KHz
THD (20—20K Hz) and IMD at + 30dB input level
RIAA Response Accuracy
Siqnal to Noise Ratio A—weighted
(a) with phono cartridge connected Ref 10mV
* Ref 5mV
(b) with short-circuit input Ref 10mV
High level input
* Inputimpedance Resistance/Capacitance
Input sensitivity * For 1 watt out
For 30 watt out
Siqnal to Noise Ratio, A—-Weighted
(a) with mute off * Ref 1 watt out
Ref 30 watt out
(b) with mute on Ref 1 watt out
* Maximum input signal
Rrequency Response, 20—20K Hz
Controls
Bass control, range at 50 Hz
Treble control, range at 10 KHz
Infrasonic filter | Turn over frequency
Slope (dB/octave)
High filter Turn over frequency
Slope (dB/octave)
Mate
Physical Specification
Dimensions WxHxD inch
cm
Net weight
Shipping weight
Power Consumption at 1 watt out
30 watt out
30W
< 0.09%
+ 1.2dB
40w
SOW
60W
+2.2dB
50W
60W
70W
+1.7dB
<< Ipsec.
> 50
15V/psec.
50
< 0.09%
< 0.09%
< 0.09%
<_ 0.09%
+0.5dB
5—45K Hz
47KQQ/47PF
0.5mV
2.5mV
190mV
19mV
1.9V
< 0.02%
+ 0.3dB
> 80dB
> 74dB
> 84dB
50K92/100PF
30mV
150mV
> 80dB
> 92dB
> 85dB
infinite
+ 0.5dB
+ 10dB
+ 10dB
20 Hz
12
7 KHz
6
—20dB
154x5.5x12
39 x 14x 30.5
20 Ibs/9 kg
22 Ibs/10 kg
30VA
200VA

ALIGNMENT
1.
IDLE
CURRENT
ALIGNMENT
ARWNo
¥
Numb WwW
*
5
Minutes
minimum
pre-heating
is
necessary
for
idle
current
alignment.
.
Set
the
volume
control
at
minimum
position.
.
Speaker
switch
should
be
set
at
off
position.
-
Connect
DC
voltmeter
across
R637
for
right
channel
and
across
R638
for
left
channel.
(see
fig.
1)
.
Record
the
reading
of
DC
voltmeter
and
refer
to
the
following
chart
to
find
the
appropriate
value
resistor
to
connect
in
parallel
with
R625
(right
channel),
or
R626
(left
channel)
on
the
bottom
side
(pattern
side)
of
PCB.
Important
notice:
The
power
switch
must
be
in
the
off
position
when
soldering
is
done.
Reading
of
DC
Voltmeter
Parallel
Resistor
Reading
of
DC
Voltmeter
Parallel
Resistor
0.4
to
0.8
mV
ik
ohm
3.1
to
4.0
mV
2k2
ohm
0.9
to
1.2mV
1k2
ohm
4.1
to
5.0
mV
2k7
ohm
1.3
to
2.0
mV
1k5
ohm
5.1
to
6.0
mV
3k3
ohm
2.1
to
2.4mV
1k8
ohm
6.1
to
7.0mV
3k9
ohm
2.5
to
3.0
mV
2k
ohm
7.1to
10mV
4k7
ohm
.
Read
the
DC
voltage
across
to
R637
(right
channel)
and
R638
(left
channel)
again.
_
If
the
DC
voltage
were
between
10
mV
and
20
mV,
then
the
alignment
is
completed.
_
If
the
DC
voltage
were
less
than
10
mV,
the
value
of
parallel
resistor
should
be
increased
until
the
DC
voltage
is
between
10
mV
and
20
mV.
_If
the
DC
voltage
were
more
than
20
mV,
the
value
of
parallel
resistor
should
be
reduced
until
the
DC
voltage
is
between
10
mV
and
20
mV.
2.
POWER
METER
ALIGNMENT
1.
Feed
a
IKHz
sine
wave
approx
150mV
RMS
to
both
channel’s
Aux
inputs.
2;
Connect
an
8
ohm
(+20%)
dumy
load
and
an
AC
voltmeter
and
oscilloscope
to
the
“main
speaker”
terminals
on
the
rear
panel.
_
Set
the
volume
control
at
maximum
position
and
other
controls
are
set
at
their
normal
positions.
.
Set
the
speaker
switch
to
“main”
position.
.
Adjust
the
input
signal
level
till
the
output
voltage
is
15.5
V
making
sure
that
no
clipping
of
the
waveform
is
occurring.
.
Adjust
VR
1
(for
right
channel)
and
VR
2
(for
left
channel)
for
a
meter
indication
of
30 W.
(or
0
dB).
(sec.
fig.
3)
In
cases
of
poor
mains
regulation
it
is
possible
that
slight
clipping
occurs
at
15.5
V
when
both
channels
are
driven
simultaneously.
If
this
is
the
case,
do
the
calibration
one
channel
at
a
time.

ALIGNMENT
3 DC OFFSET ALIGN MENT
1. 5 minutes minimum pre-heating is necessary for DC offset adjustment.
2. Set the volume control at minmum position.
3. Speaker switch should be set to “‘main” position.
4. Connect a DC milli-voltmeter to the “main speaker” terminals of each channel. The meter sensitivity should be set
for 100-300mV full scale deflection. The positive input of the meter should be connected to the red (+) speaker
terminal.
. If the readings are within + SOmV, then no adjustment is necessary.
6. If the reading is more than + 50mV then refer to Table I to find the appropriate value resistor to connect from point
A (right) to C (right) on the bottom side (pattern side) of PCB. (see fig. 1 )
B (left) to D (left)
7. If the reading is less than -SOmV then also refer to Table I to find the appropriate value resistor to connect from
point A (left) to E(left) one the bottom side (pattern side) of PCB. (see fig. 1 )
B (right) to F (right)
8. Use a piece of insulating sleeve on the resistor legs to avoid shorting to PC board tracks, and make sure the resistor
is not pressed against a sharp cut edge of a component leg.
* Important notice: The power button must be in the off position when soldering is done.
an
Table I
Reading of DC Milli Voltmeter *Resistor
50 to 60 mV 100k ohm OR 330k ohm
60 to 75 mV 82k ohm OR 270k ohm
75 to 90 mV 68k ohm OR 220k ohm
90 to 110 mV 56k ohm OR 180k ohm
110 to 135 mV 47k ohm OR 150k ohm
135 to 165 mV 39k ohm OR 120k ohm
165 to 200 mV 33k ohm OR 100k ohm
to mV ohm OR ohm
9. After having soldered in the resistor, repeat steps 1 through 5.
* If the feedback resistors of power amplifier (R 613, R614) are 10 kohm then select from colum A if 33 kohm then
select from colum B.

*
Ryy
(Right)
Ryo
(left)
For
Idle
Arrent
Alignment
Ry1
(Right)
Ry2
(left)
For
DC
OFFSET
Adjustment
(If
“+”
reading)
Ry3
(Right)
Ry4
(left)
For
DC
OFFSET
Adjustment
(If
“—”
reading)
ALIGNMENT
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Fig.
1
Patten
Side
View

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19-1056
BALANCE
Germany, Portugal, Spain, France, Argentina, South Africa
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SC : Denmark, Sweden, Finland, Norway
AS : Australia
BS : UK
IL : Italy
SI. HK : Singapore, Hong Kong
UL. LO. CSA: USA, Taiwan, Canada
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PARTS LIST
Tue AL al SSL 90—1057 High Level Pre-Amp Section
| ITEM PARTS NO DESCRIPTION Q’ TY | SYMBOL NO
ITEM PARTS NO DESCRIPTION QTY | SYMBOL NO
1 16-%C331J CARBON RES. 330 OHM 4W +—5% 2 R643, 644
2 16—4%C5R6J CARBON RES. 5.6 OHM 4W + — 5% 1 R701 16—%C224J CARBON RES. 220K OHM %W + — 5% 2 RS11, 512
3
16—%C100J
CARBON
RES..10
OHM
%4W
+
—
5%
2
R641,
642
16—%C392J
CARBON
RES.
3.9K
OHM
4W
+
—
5%
2
R521,
522
4 16—%C101J CARBON RES. 100 OHM 4%W + — 5% 5 R617, 620, 629, 630, 706 16—%C561J CARBON RES. 560 OHM %W + — 5% 2 R513, 514
| 5 16—%C102J) CARBON RES. 1K 4W+—5% 4 R601, 602, 703, 704 16—%C562J) CARBON RES. 5.6K OHM %W + — 5% 4 R515—516
6 16—%C103J CARBON RES. 10K %W + — 5% 3 R529, 530, 705 16—%4C821J CARBON RES. 820 OHM AW + — 5% 2 R519, 520
7 16—%C104J CARBON RES. 100K %W + — 5% 4 | R533, 534, 541, 542 17—0.63E107Y ELEC CAPA 100UF 6.3V + 50 — 10% 2 C509, 510
8 16—%4C152) CARBON RES. 1.5K OHM %W + — 5% 2. | R611, 612 17—2.5E476Y ELEC CAPA 4.7UF 25V +75 —10% — 4 C515, 506, 513, 514
9 16—%C153) CARBON RES. 15K OHM %4W + — 5% 4 R523—526 17—5D101K CER. CAPA 100PF + — 10% 50V 2 C507, 508
10 16—%C155J CARBON RES. 1.5M OHM %W + — 5% 2 R531, 532 17—5D102M CER. CAPA 1000PF + — 20% 50V 2 C515, 516
11 16—%C221J CARBON RES. 220 OHM %W + — 5% 4 R609, 610, 631, 632 17—5D220K CER. CAPA 22PF + — 10% 50V 2 C511, 512
12 16—4%4C222J CARBON RES. 2.2K 4W + — 5% 4 R607, 608, 621, 622 19-1057 P.C.B. 1
13 16—%C2733 CARBON RES. 27K %W + — 5% 4 R549, 550, 507, 508 29-4059 VOLUME CONTROL 100KB x 2 1
14 16—%C331J CARBON RES. 330 OHM %W + — 5% 4 R615—618 30—2096 TRANSISTOR BC556 2 Q503, 504
15 16—%C332) CARBON RES. 3.3K OHM %W + — 5% 1 R702 30-2101 TRANSISTOR 2SC1571G 2 Q501, 502
16 16—%4C3903 CARBON RES. 39 OHM %4W + — 5% 2 R539, 540
17 16—%C391J3 CARBON RES. 390 OHM 4W + — $% 2 R605, 606
18 16-%C392) CARBON RES. 3.9K OHM %W + — 5% 2 R535, 536
19 16—%C393J CARBON RES. 39K OHM %4W + — 5% 2 R603, 604 13-6004 PIN 3
20 16—%4C472) CARBON RES. 4.7K OHM %W + — 5% 8 R501—506, 623, 624 16—%C101J3 CARBON RES. 100 OHM %W + — 5% 2 R807, 808
21 16—%C474] CARBON RES. 470K OHM 4%W + — 5% 4 R551, 552, 547, 548 16—%C103J CARBON RES. 10K %W + — 5% 4 R809—812
23 16—%4C562J CARBON RES. 5.6K OHM %W + — 5% 6 R509, 510, 545, 546, 537, 538 16—%C104J CARBON RES. 100K OHM %W + — 5% 2 R805, 806
23 16—%C563) CARBON RES. 56K OHM %4W + — 5% ) R543, 544 16—%C123J CARBON RES. 12K %W + — 5% 2 R813, 814
24 16—%C681J) CARBON RES. 680 OHM %W + — 5% p) R625, 626 16—%C473J CARBON RES. 47K ‘AW + — 5% 2 R801, 802
25 16—%4C682J CARBON RES. 6.8K OHM %W + — 5% 2 R627, 628 16—%4C334J CARBON RES. 330K 4W + — 5% 2 R804, 803
26 16—%C822) CARBON RES. 8.2K OHM 4W + — 5% 2 R627, 628 17—1E106Y ELEC CAPA 10UF 10V + 50 — 10% 2 R803, 804
27
16—1002
0.47
OHM
+
—
5%
2W
MPC
70
4
R635—638
17—2.5E475Y
ELEC
CAPA
4.7UF
25V
+
75
—
10%
2
C801,
802
28 16—2A100K METAL OXIDE RES. 10 OHM 2W + — 10%- 2 R639, 640 19-1058 P. C. B. (METER DRIVER) 1
29 17—0.63E107Y ELEC CAPA 100UF 6.3V + 50 — 10% ye C621, 622 29—4023-1 SEMIFIXED RES. 20KB D
30 17-2.5E475Y ELEC CAPA 4.7UF 25V + 75 — 10% 6 C523, 524, 527, 528, 601, 602 30-1019 DIODE BAW62 4 D801—804
31 17—0.63E476Y ELEC CAPA 47UF 6.3V + 50 — 10% 2 C605, 606 30-2090 TRANSISTOR BC546 2 Q801, 802
32 17—2.5E476Y ELEC CAPA 47UF 25V + 50 — 10% 4 C707—710
33 17—3.5E107Y ELEC CAPA 100UF 35V + 50 — 10% 4 C623—626
34
17-3.5E108Y
ELEC
CAPA
1000UF
35V
+
50
—
10%
1.
|C703
16—%C1013
CARBON
RES.
100
OHM
“W
+
—
5%
4
R405,
406,
431,
432
35 17—3.5E476Y ELEC CAPA 47UF 35V +50 —10% 2 C611, 612 16—%4C102J3 CARBON 1K YW+— 5% 4 R425—428
36 17—3.5P688Y ELEC CAPA 6800UF 35V 2 C701, 702 16—%C105J CARBON -IM%W+ — 5% 2 R417, 418
37 17-5D101K CER. CAPA 100P + — 10% 50V 4 C613, 614, 617, 618 16—%4C106J CARBON . 10M %4W + — 5% 2 R411, 412
38 17-5D103M CER. CAPA 0.01UF + — 20% 50V > C704, 705 16—%C162J CARBON 1.6K YW + — 5% 2 R413, 414
39
17—-5D104M
CER.
CAPA
0.1UF
+
—
20%
50V
4.
|
C619,
620,
627,
628
16—%C221J
CARBON
.
220
OHM
%W
+
—
5%
2
R423,
424
40
17—5D201K
CER.
CAPA
200PF
+
—
10%
50V
2
C603,
604
16—%4C222J
CARBON
2.2K
YW
+
—
5%
2
R409,
410
41
17—-5D220K
CER.
CAPA
22PF
+
—
10%
SOV
2
C525,
526
16—%C331J
CARBON
.
330
OHM
%W
+
—
5%
2
R419,
420
42
17-5D470K
CER.
CAPA
47PF
+
—
10%
50V
2
C609,
610
16—%4C333J)
CARBON
33K
YW
+
—
5%
2
R429,
430
43
17-5D471K
CER
CAPA
470PF
+
—
10%
50V
°
2
C501,
502
16—%C334J)
CARBON
.
330K
%4W
+
—5%
2
R433,
434
44
17—5F103M
MYLAR
CAPA
0.01UF
50V
+
—20%
2
—°|C615,
616
16—%C392J
CARBON
3.9K
YW
+
—
5%
2
R407,
408
45 17-5F104J MYLAR 0.1UF 2 C623, 624 16—%4C474] CARBON . 470K %W + — 5% 2 R401, 402
46 17—5F152) MYLAR CAPA 0.0015UF S0V + — 5% ”) C521, 522 16—%C563) CARBON 56K 4W + — 5% 2 R403, 404
47 17-5F154K MYLAR CAPA 0.15UEF 50V + — 10% 2 -} C503, 504 16—%C820J3 CARBON RES. 82 OHM %4W + — 5% 2 R421, 422
48 17—-5F274K MYLAR CAPA 0.27UF 50V + — 10% 2 C533, 534 16—%C823J) CARBON RES. 82K OHM %4W + — 5% 2 R415, 416
49 17—-5F334K — MYLAR CAPA 0.33UF 50V + — 10% 2 C531, 532 17—0.63E476Y ELEC CAPA 47UF 6.3V + 50 — 10% 6 C413—-418
50 17—5F473J MYLAR CAPA 0.047UF 50V + — 5% 4 C517—520 17—25E475Y ELEC CAPA 4.7UF 25V + 75 — 10% 2 C421, 422
51 17-5F822J MYLAR CAPA 0.0082UF 50V + — 5% 2 C529, 530 17—2.5E106Y ELEC CAPA 10UF 25V + 50V — 10% 2 C401, 402
52 19-1056 P. C. B. (MAIN AMP) 1 | 17—5D100K CER. CAPA 10PF + — 10% 50V 2 C411, 412
53 29-1040 INDUCTOR 0.6 x 15T 3, L601, 602 17—5D101K CER? CAPA 100PF + — 10% 50V 2 C419, 420
54 29-4028. VOLUME CONTROL GM 70E—SOKB x 2 2 17-5D102M CER. CAPA 1000PF + — 20% 50V 4 C423—426
55 ~ 29-4045 VOLUME CONTROL VM10E-—250KW 1 17—5D500K CER. CAPA 50PF + — 10% 50V ) C403, 404
56 30-2115 TEANSISTOR 2N6552 4 Q607—610 17—5F1023 MYLAR CAPA 0.001 UF 50V + — 5% 2 C405, 406
57 30-1002 DIODE IN4002 a D703, 704 17—5F152J MYLAR CAPA 0.0015UF 50V + — 5% 4 C407—410
58 30-1016 ZENER DIODE 23V 0.5W a D707, 708 18—1004—8 CORE ASS’Y 2
59 30-1017-1 DIODE GI3B 4 D701—704 19-1062 P. C. B. (EQ) 2
60 30-1019 - DIODE BAW 62 6 D601, 602, 605—608 30—2084—3 TRANSISTOR BC549 5 Q403, 404
61 30-1024 VARISTOR SV04 2 D604, 603 30—2085—2 TRANSISTOR BC546B > Q401, 402
62 30—2004R TRANSISTOR 2N3055 2 Q613, 614 30—2090—2 TRANSISTOR BC546B 2 Q409, 410
63 30-2077 TRANSISTOR 2SC1384Q 1 Q701 30-2096 TRANSISTOR BC556A 4 Q405--408
64 30-2081 TRANSISTOR 2AS608E 6 Q601—604, 617, 618
65 30-2096 TRANSISTOR BC556 3 Q507, 508, 702
66 30-2101 TRANSISTOR 2SC 1571G 4 Q505, 506, 605, 606 12—2007 SPEAKER TERMINAL SOCKET 2
67 30—2114M TRANSISTOR MJ2955 mo Q615, 616 12-2008 PHONE JACK 1
68 30-2116 TRANSISTOR 2N6555 2 Q611, 612 12—2015 DIN JACK 1
69
30-1024
SELECTOR
SW.
SRZ—V044N
(12.5)
1
16—%C224J
CARBON
RES.
220K
+
—
5%
%W
p
R555,
556
70
31-1040)
PUSH
SW.
5
KEY
2U
1
16—%C154J
CARBON
RES.
150K
+
—
5%
%W
5
R553,
554
71 31-1051 ROTARY SW. SRZ—V043 (12.5) 1° 19-1047 PCB 1 :
- 72 16—-%4C183J CARBON RES. 18K OHM %W + — 5% 2 R545, 546 31—1025T PUSH SWITCH 2 KEY 1
73 16—%4C3333 CARBON RES. 33K OHM %W + — 5% 2 R613, 614 35-1013 POWER METER 2