NAD 214 User manual

SERVICE MANUAL
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SERVICE SAFETY PRECAUTIONS (UL)
1. Use exact replacement parts for critical locations marked ANG
2. Return lead dress to original position and re-install protective covers.
3. Before returning to customer, test for shock hazard; use either mothod A or B:
A. Leakage test “cold”:
1. Unpiug the AC cord; turn power switch ON.
2. Connect one lead of High Voltage Insulation Tester to both prongs of the AC plug.
3. Touch other lead to all exposed metal parts. :
4. Impedance measurement must be 0.3-5.0 Megohms.
B. Leakage test, “live” :
1. Plug unit directly into the AC outlet: do not use isolation transformer.
2. Connect one lead of the Leakage Current Tester to earth ground.
3. Touch other jead to all exposed metal parts.
4, Leakage measurement must be less than 0.5 milliamps.
214/216 ©
STEREO POWER
AMPLIFIER

TABLE OF CONTENTS
SPECIFICATIONS
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ALIGNMENT
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NOTE:
The
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given
after
an
item
number,
refers
to
the
part
number
for
the
model
216
only.

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SPECIFICATIONS
Specifications are measured in accordance with EIA Standard RS-490 (IHF T-202) for amplifiers.
STEREO MODE 214
Continuous Power Output... 8 ohms 80W
(20H2/1kHz/20kHz at rated THD) 4 ohms 120W
Clipping Power at 0.1%THD..........0.. 8 ohms 95W
(1kHz) 4 ohms 150W
Rated THD (with 8OKHZ LPF)...........ccccccccseceeeeeeeeeteeeceeeeeeeners 0.03%
20H2/1kHz/20kHz at rated power
Soft Clipping THD, 1KHZ........... ec ccecssseeensennteeeeeeeeeeeeeeeeeeees 10%
Output Reduction 1dB
Signal/Noise Ratio, 1KHZ.......... ee ref. 1W 96.5dB
(A-weighted, 220 ohm load) ref. 8 ohms rated power 115.5dB
Frequency ReSponse............... cece eee eeeeee 20Hz 0~-0.3dB
20kHz -0.2~-0.8dB
Input Sensitivity, 1KHZ...... eee eeseseeeestneeeeeeeeeees 895+30mV
(Rated output into 8 ohms)
Channel Separation.............00..ceceeeeeeees 1kHz 75dB
10kHz 58dB
DAMPING FaCtOlesiecscccsteccassesencestonvsccusiattereeeeagates st qadvusei on vecteaed 200
(at 50Hz/8 ohms)
Dynamic Powe?l............. cece eeeeeeeeeeeeees 8 ohms 110W
4 ohms 180W
2 ohms 250W
BRIDGE MODE
Continuous Power Output........000 8 ohms 240W
(20H2/1kHz/20kHz at rated THD
with 80kHz LPF)
Input Sensitivity.........000 ene eeeeeeeeeeneeeeeeeeeaa es 775+40mV
(Rated output into 8 ohms)
PHYSICAL
Dimensions (Width x Height x Depth)... 435 x 128 x 370mm
Gross Weight seis cerca ehhh ees ethers at 12.5kg (27.5ibs)
Power consumption at 120, 220 or 240VAC, 50/60Hz............ 384VA
216
125W
200W
150W
250W
0.03%
10%
1dB
96.5dB
117.5dB
0~0.3dB
-0.2~-0.8dB
1120+40mV
75dB
58dB
200
170W
280W
400W
400W
1000450mV
435 x 146 x 370mm
15.5kg (34. 1Ibs)
540VA

WARNING: TO PREVENT FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPLIANCE
TO RAIN OR MOISTURE.
FRONT PANEL
Stereo Power Ampiifier 216
sort snoat
POWER CLIPPING MODE
POWER Switch
POWER Indicator
SOFT CLIPPING Indicator
BRIDGE MODE Indicator
ROMs
The lightning flash with arrowhead symbol, within an equilateral
triangle, is intended to alert the user to the presence of
uninsulated "dangerous voltage" within the product's enclo-
The exclamation point within an equilateral triangle is intended
to alert the user of the presence of important operating and
maintenance (servicing) instructions in the literature
sure,
that
may
be
of
sufficient
magnitude
to
constitute
a
risk
accompanying
the
appliance.
of electric shock to persons.
REAR PANEL
‘wra0a$ woo
‘Or aMOMO) | OFF (aTERED)
1. BRIDGE MODE Switch
2. INPUT Jacks
3. SOFT CLIPPING Switch
4. SPEAKER OUTPUT Terminals
5. AC POWER CORD
‘ete!

LED
MAINS
SPEAKER
RIGHT CHANNEL
POWER SUPPLY
PCB LAYOUT
LEFT CHANNEL
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EXPLODED VIEW PARTS LIST
ITEM NO. PART NUMBER DESCRIPTION QTY.
1 N14619601-1 Fascia 214 |
1A N14620601-1 Fascia 216 1
2 N14023250-1 Subfascia 214 1
2A N14023350-1 Subfascia 216 |
3 N14023270-1 Base Plate 1
4 N14023290-1 Subchassis 1
5 N14023300-0 Access Cover 2
6 *AH N14023260-1 Rear Panel 214 AH 1
6 *C N14023320-1 Rear Panel 214C 1
6 A*‘AH N14023360-0 Rear Panel 216 AH |
6 A*C N14023370-1 Rear Panel 216C 1
7 N14023280-0 Top Cover 214 1
7A N14023380-0 Top Cover 216 {
8 N41519991-0 Bezel 1
9 N41520011-0 Clear LED Lens 3
10 N2437640B-0 Power Button 1
11 N16600600-0 Shrinkage Tube ID=38.i1mm 0.07m 1
12 N16600710-0 Sleeve Tube ID=10mm 0.3m 1
13 *C N21038004-0 Speaker Terminal with Plug C 1
13 *AH N21038104-0 Speaker Terminal without Plug AH 1
14 A*AH N41520022-0 UL Box Backplate Pantone 420 Grey AH 1
15 A*AH N41520031-0 UL Box Saddle AH 1
16 A*AH N41519981-0 UL Box Cover AH 1
17 N41519951-0 PCB Support (LCBS) 4
18 N17110821-2 214/216 Amp PCB without components 1
19 N31003191-0 Silicon Sheet 8
20 N41321671-0 Transistor Clamp 8
21 N41321661-0 Thermal Mounting Clip 2
22 N54000841-0 Main Heatsink 214 2
22 A N54000871-0 Main Heatsink 216 2
23 N54000831 -0 Heatsink Power Amplifier 4
24. N54000851 -0 Heatsink Regulator 2
25 N54000821-1 Heatsink Power Supply 214 1
25 A N54000901-0 Heatsink Power Supply 216 1
26 *AH N70093100-1 AC Cord 18AWGx2 UL/CSA SPT-2 AH ZN 1
26 *B N70095100-0 AC Cord ASTA BS1363 with 5A Fuse B A 1
26 *BI N70091 190-1 AC Cord SAA AS31112 Bi ZN 1
26 *C N700931 10-0 AC Cord SEMKO C maN 1
27 N41519461-0 Strain Relief Bushing 1
28 N89100055-0 Thermal Breaker UP 7290C 2
29 N18062102-0 Transformer TI-61233with Accessory 214 ZN 1
29 A N18062105-0 Transformer TI-61242with Accessory 216 A 1
30 N41322151-0 Transformer Bracket 1
31 N41519411-0 Cushion 130x10x1.0mm 1
32 N41520331-0 Transformer Bushing 1
33 28368075-0 Nut M8x0.75mm 214 1
34 29078070-2000 Bolt Hexagon Head M8x0.75mm -70mm 214 1
34 A N41321891-0 Bolt + Nut Hexagon Head BSW i8TPI -3.5" 216 {
35 28428015-0 Spring Washer M8 1
ITEM NO. — PART NUMBER DESCRIPTION QTY.
36 41321971-0 Flat Washer M8x22x1.5mm 1
37 28153042-0 Screw M3x4mm 2
38 29004006-3010 Screw M4x0.5x6mm__ with Flat Washer 6
39 29084012-3400 Screw Hexagon Socket Head 4x12mm_ Blk 8
40 29542606-0000 . Screw BT _ 2.6x6mm 8
41 29543006-0000 Screw _B-Tite 3x6mm_Yel.Zn 17
42 29543006-3000 Screw _B-Tite 3x6mm_Bik.Zn 6
43 29443008-3000 Screw S-Tite 3x8mm_ Bik 2
44 29503008-3000 Screw Tapping 3x8mm 8
45 29543008-3000 Screw _B- Tite 3x8mm_—Bik.Zn 11
46 29543010-3000 Screw _B-Tite 3x10mm__Bik.Zn 12
47 29543510-0000 Screw _B-Tite 3.5x10mm_ = Yel.Zn 1
48 29503516-3100 Screw _B- Tite 3.5x16mm 22
49 28423367-0 Metal Washer ID=3.3mm OD=6.7mm 4
50 A N18080110-0 Ferrite Core 33RH15.5x28.5x7.3 216 1
51 N41519371-1 Rubber Foot 4

EXPLODED VIEW

WIRING DIAGRAM
Channel =
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Speaker
Soldered
Power Supply
to Tab on
Subchassis
=
RY | e601
Cl
{| te
Ga
\
Pe Hen
° GANS |] vP303
‘
—
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2
Legend:
Blu - Blue
Bik - Black
Brn - Brown
Grn - Green
Gry - Grey
Org
-
Orange
ee
a
Red - Red
Vio - Violet
Wht - White Power
Note: All PCBs are shown copper side.
Transformer
‘Mains Mains
AH Version C Version &
ene ae =

SCHEMATIC DIAGRAM
214 POWER AMPLIFIER
MUTE,
CLIPPING
Q317, 0329, Q331, Q333, 0335, ond THI01
‘are mounted on the left-hand Moin Heatsink.
0325 ond Q327 ore mounted on small heatsinks.
alien or ur tere tection
MAINS SWITCH
A rs:
10K
R382
0318, Q330, 0332. 0334, 0336, ond TH102 ;
are mounted on the right-hand Moin Heotsink
0326 ond 0328 ore mounted on smoti heotsinks,
1. All resistors ore carbon film types,
0.25 watts, 5% tolerance, unless otherwise specified.
R = ohms MF = metal film resistor
K = kilo ohms FP = flameproof resistor
M = mega olims FUSIBLE = fusible resistor
CERAMIC = ceromic cose resistor
2. All copacitors are in microforads.
n = nanoforads P = picofarads
3. Color abbreviations:
RED = red ORG = orange
BLK = block GRN = green
BRN = brown GRY = gray
T-61233
|
|
wor
e
O_St
|
Pacer
Canter
g
XC
‘Supply Top
PCB
| oo
, SE AH Versi
|
ia
ersion
aes
PE
ON
EE
ry
eg
pe
ee
ts
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face
Sp
RR
SE
os LEFT CHANNEL
POWER AMPLIFIER
bs:
+/-55V REGULATOR MAIN POWER SUPPLY
* A eas A “tere
R205 ‘R201 Input
oS pp Bel incon tw FUSBLE a“
+5
EH
C204 202 :
}4700/63 }4700/63
Center |
Ec
C208 c203 |
4700/63 4700/83
-5y |
2$86h1 oa a 184003 yas |
zs
Sn
ae
a
|
Wide thes __ 1 |
onip |
i |
Tr |
im RIGHT CHANNEL
| POWER AMPLIFIER
1402
eee oS tt
T |
i SPEAKER TERMINALS |
Notes:
9
TA7317P
2SA1386
2SC3519
2SA1837
28C4793
Fen
2SA1478
2SB631
28C3423
2SC3788
2SD600K
Fee
284970
2801815
2S8€2240
2S8C2878
om
2SA1370
2S8C3467

Q317, 0329, 331, 0333, 0335, 0901, 0903, 9905, 0907, ond THIO1 |
R303, ‘ore mounted on the lefthond Mon Heatsink.
== wk: PO, 0325 and 0327 are mounted on small neatsinks. |
| we a
305
| iyi VY 8 {)
Ws 22, Ly omnes
R30 an A | gM 2scie8
23334
ws R33 33 A
= (r) ms 0.25 |
FP
nos 9 ode
ME Ix iv
931
AMPLIFIER 1 ae ped
216 POWER a ce
we |
. ro 319 ae
( |~ A
Agzr P
2 (Vv A
eth) wis r)
282240 ass
Roi “aS sas A ts01
0307 a AX swso1
&%
2549;
‘A%4
ie
61242
REO
R313, S 317 ce
wk asi 2 To
|
758979
P)
RMS
asaia7e
|
Bone
Cente
Bx
ct
op
cit 15308 | RS sir 0.25W FP (y" er
am
al
UN
1g
O62
hs
Rape *, |
R341.
R301 R317, ane 120: ySst4,
| nc oe ae ee “a
aig c3o7 NFS: _ FP C35 R387 R385 AH Version
cy
2209
is
on
BEE
oo
LE
ing
eB
ns
ane
sp2o1
|
APSO
1
wri
|
MF
Ix
|
——
wr
+
iy
tt
A331
wis LEFT CHANNEL |
POWER AMPLIFIER
+VLg GNDE -MUg 0/P,
eek ee ere tek Nae ee A a ee ce = S9 a ed Teal
3 as amas Sa eee
we x03 [1
iran | Maite eee oor rear 2
ea
3
dst
aes
Sack
set
ee
Ses
i
os
a
Aa
ea
ee
[IG
ee
Sen
Pa
ee
a
ee
rt
ee
a
203 sail
MAIN POWER SUPPLY ~ |
+/-67V REGULATOR
Tronate
jh
re
ee
.
=
wt
CLep Pcs | | |
| re Hs | |
| 7
:
|
|
ee
|
: a Oa
CON
rae ES arate my
~~ gage” Ra
82 ON mmm OFF IW MF 1%
6) 5) 4
Vj2]3 bee
or
HE
by
EI
poh
OsW
MF
tx
|
R240: ee R241
22K
226
;
| |
1/100}
0212
0211
ANG148
1N4148
7
4 i
INPUT, MUTE, we : hen == =|
a
1
SOFT CLIPPING ofa
and DC || SERVO “1
1
des ee at ee ees.
. ON th Went Laan fee ag Co ee Cae ope GNOFY -' oype
RIGHT
CHANNEL
a0
ui
a
cno
—w.
|
POWER AMPLIFIER Rial
10/100 |
L
10/100
Ae Sy
A
“or 1%
" ‘ | Notes:
470.
328
| 1. All resistors ore carbon film types,
A a 0.25 watts, 5% tolerance, unless otherwise specified.
5K6 7/10 R = ohms MF = metol film resistor
WAN . K = kilo ohms FP = flomeproof resistor
M = mega ohms FUSIBLE = fusible resistor
K oF CERAMIC = ceramic cose resistor
10K ay F ¥ .
R384 ” 2. All capacitors ore in microforads.
3. Color abbreviations:
|
|
|
TD | n = nonofarods p = picofarads
|
|
|
RED = red ORG = oronge
0318, 0330, 0332, 0334. 0336, 0902, 0904, 0906, 0908, ond THI02
tie are mounted on the right-hond Noin Heatsink. BLK = black GRN = green
ore * 0326 ond 0328 ore mounted on small heatsinks. BRN = brown GRY = groy