NAD 5240 User manual

_
MANUAL
i)
5220
COMPACT
nian
PLAYERS

NAD
5240/5220
SERVICE
MANUAL
NOTICE:
This
manual
covers
all
versions
A: North America
C: Canada
_E: Europe & Others
U: UK
Y: Australia
TABLE
OF
CONTENTS
PAGE
SR
ECIPICA
TIONS
mis
%
cut
hv
en
a
ote
en
neues
add
Rad
ees
9
DISASSEMBLY.
INSTRUCTIONS
«Misc
tsat
iol
saianden
$e
(ad
meniyacad
3
BLOC
DING
RA
Mie)
htt
ties
ce’
A
natess
lence
call
nas
hat
ee
ei
oan
7
IG
TERMINAL
FUNCTION:
ot.cccsn
cotati
saws
a
cat
pate
te
Ph
wecme
ee
8
AB
IIS
TIME
NTS
ite
coc
saree
uted
Ue
at
teas
baat
ahah
pee
eats
ate
14
ELECTRICAL
PARTS
LOCATIONS
AND
WIRING
DIAGRAM...........-5:
16
SCHEMATIC
DIAGRAM:
4
6is
cucu
ee
panl
wet
tees
taiwan
seus
17
MECHANISM
EXPLODED:
VIEWO
Sa
Mache
ts
aeautanwsee
ue
ye
eure
de
acen
ata
d
wea
20
CABINET
EXPLODED
VIEW
ce.
2
scdik
apts Seen
k
aoe
ee
RNA:
21
PARTS
LIST.
54
eset
stone
Vawws
Pale
adele
a
We
bea
Veit
ae
Ue
Sel
SS
22

REAR PANEL
1. Output Jacks.
a. Fixed
b. Variable (5240 only)
2. AC Line Cord.
la.
1b.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION TO REDUCE
THE RISK OF ELECTRIC
SHOCK, OO NOT REMOVE
COVER (OR BACK)
NO USER-SERVICEABLE
PARTS INSIDE REFER
SERVICING TO QUALIFIED
SERVICE PERSONNEL
FIXED VARIABLE
OUTPUT OUTPUT
FRONT
PANEL
5220
Front
Panel
. Power On/Off.
. Disc Drawer.
. Open/Close.
. Play/Pause.
.
Reset.
RY
.
Skip
Forward
/Back.
TIMER
PLAY
a
.
Scan
Forward/Back.
Disptay
Selector.
.
Memory.
oPLay
MORTEPEAT
PLAY
.
Repeat.
. CDR (Controlied Dynamic Range; 5240 only).
. Status Indicators.
. Timer Play (5220 only).
POWER am
—_ a at ot
WNBA COONAN ASON=
Compact
Disc
Player
5240
TIME
REMAIN
(Iw
aH
PAUSE Hi Cc. O105
OPEN CLOSE PLAY PAUSE
1
2
3
4
5 8
9
10
11
7

SPECIFICATIONS
Type:
Quantization:
Channels:
Frequency response:
Dynamic range:
Total
harmonic
distortion:
Channel separation:
Wow and flutter:
Output:
Pickup:
Track search:
Power consumption:
Dimensions:
Weight:
Compact
Disc
Player
with
optical
pickup
16
bit
linear
2 channels (stereo)
5 Hz — 20 kHz +0.5 dB
94 dB
0.004% (1 kHz)
90 dB
Unmeasu rable
2.0 Volts
Semiconductor laser
By track number
13 Watts
340(W)
x
57.5(H)
x
309.5(D)
mm
2.9
kg

DISASSEMBLY INSTRUCTIONS
TOP COVER REMOVAL
1. Remove two screws @) from top cover side boards
and four screws (B) from rear side, and the top cover
will be removed,
TRAY PANEL REMOVAL
1. Remove top cover.
2. Lift up mechanism assembly clamper lever © and
pull out disc tray (0) forward by your hand.
3. Release two hooks ©) on tray panel, and the tray
panel will be removed.
Disc Tray
%,.
- Cam Gear
© Clamper Lever
Tray Panel

FRONT
PANEL
REMOVAL
(with
Display
P.C.
Board)
1.
Remove
top
cover
and
tray
panel.
2,
Remove
four
screws
(F)
and
@
from
both
side
and
three
screws
(H)
from
bottom
side,
and
the
front
panel
will
be
removed.
)
MECHANISM ASSEMBLY REMOVAL
1. Remove tray panel,
2. Remove five screws and GQ), and two connectors
, and then the mechanism assembly will be re-
moved,
* Clamper lever removal
1.
Push
clamper
lever
hook
to
arrow
©
direction
with
minus
driver,
and
the
clamper
lever
will
be
removed by pulling it.
2.
\f
hook
is
broken,
use
screw
with
washer
™)
(63
x
8mm) as illustrated.
)
sf

DISC TRAY REMOVAL
1. Lift up clamper lever with disc tray in the deepest
side and ‘pull disc tray until it stops. Pull disc tray
with mechanism main chassis hook pushed to arrow
(N) direction, and the disc tray will be removed.
* Disc tray mounting procedure on mechanism
1. Insert disc tray with cam gear turned to counter-
clockwise direction © fully, and the disc tray can
be mounted,
CAUTIONS OF DISC TRAY REMOVAL
1, There are two types of mechanism chassis, differing
in @ and () as shown in Figure B.
2. In the first type ® (Figure B), the disc tray will be
removed by pulling the disc tray forward.
3. In the 2nd type, O in Figure B is hooked at W as
shown in Figure A,
4. Two remove the disc tray in the 2nd type push ®
(Figure A) to the arrow direction. And the disc tray
will be removed as shown in @) (Figure A).
Figure A Figure B

LASER PICKUP REMOVAL
1.
Short-circuit
Laser
Pickup
P.C.
Board
pattern(P).
2.
Remove
six
screws
and
®)
,
and
two
connectors
(S),
and
the
laser
pickup
will
be
removed.
(S) Connectors
CAUTION
ON
LASER
PICKUP
REMOVAL
1.
When
removing
laser
pickup,
solder
and
short-circuit
terminals
to
protect
laser
pickup
from
damage
which
may
be
caused
during
the
removal.
2.
Disconnect
leads
from
connector
after
soldering
is
completed.
Do
not
touch
the
pickup
terminals
with
your
hand.
_
When
mounting
laser
pickup,
connect
the
leads
to
connector
before
unsoldering
the
solder
used
to
short-circuit.
wo
CAUTIONS
ON
LASER
PICKUP
REPLACEMENT
_
When
mounting
a
new
laser
pickup,
first
connect
the
leads
to
connector
and
then
unsolder
the
solder
used
to
protect
laser
diode
on
P.C,
Board.
Use
a
soldering
iron
grounded
(or
leakageless
iron).
Cover
working
bench
with
conductive
mat
grounded.
*
Before
proceeding
job,
always
touch
the
conductive
mat
or
ground
lead
with
your
both
hands
to
discharge
electric
charges
developed
on
your
body.
=
e Solder the pattern shown in
ilustration before disconnecting
connector and leads.
DISC TABLE MOUNTING
Insert
spacer
which
was
packed
with
motor,
between
main
chassis
and
disc
table.
Push
center
of
disc
table
until
it
touches
spacer.
Notes:
1.
When
mounting
disc
table,
take
care
of
disc
table
not
to
touch
pickup
or
disc
tray.
2.
Mount
disc
table
in
parallel
with
main
chassis.
3.
There
are
three
kinds
of
spacer
jigs
corresponding
to
the
motor
assemblies
or
three kinds
of
pickups.
Check
your
pickup
and
order
the
motor
assembly
you
want.
wf Disc Table
CD am Spacer Jig
Alle
13
+0.1mm
|
Main chassis

(5240)
3
Beam
Pick
Up
DAC
TD6720N
OUTPUT
AMP
{iF
fia Circuit
CIRCUIT |
re eer ea |
NEW © ©)
DAC
5240
(S/H OUT)
4
Servo
status
a Sig’ Det’
ci & C2
Error Correction
TC92Z0IAF
- q
{ -LD-APC |
|
L
Circuit | ra4
—-—--- |Phase
Comp}
I
(N
Correction
Timing CORRECTION
Generotor
Servo Status Signal Processor
Servo Control Signat Processor
Osta strobe
{Digital PLL)
Sync Sepa’
Subcode EFM Demodu’
&
Q
CLV
Control
CD
Bus
Control
Butter
Sabeoee
PICK-UP
MOTOR
I
4
ee
t--74
|
interface
|
———
TC9200AF
DISC
MOTOR
2«
x
8bit
RAM
VARIABLE
VOLUME
out
CXKS8I6M
VARIABLE.
Poti
ee
ee
a
1
1
|
5
Micro
LOADING
MOTOR
post
SS
4
1
chip
Micro
Computer
bea
|
ees
eee
7
TMP4270N-9401
Display
‘
ow
TMP47C
420AF-8612
ey
Fe
(5240)
(5240)
Remote Control
Receiver
BXI407
INVYSOVIG HO01E8

IC
TERMINAL
FUNCTION
TC9154AP
Vs
L- OUT |
Lo INI
A-GND
L-IN2
L-OUT 2
ST
GNO
18 BIT SHIFT REGISTOR
18 17 1615 14 13 121 109 87654 3 2 I
7 BIT LATCH CIRCUIT
CK
OQ
x
6 BIT LATCH CIRCUIT
6 BIT LATCH CIRCUIT