NAD 613 User manual

SERVICE MANUAL
SERVICE SAFETY PRECAUTIONS (UL)
1. Use exact replacement parts for critical locations marked “ /\*
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. Unplug 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 lead to all exposed metal parts.
4. Leakage measurement must be less than 0.5 milliamps.
613
CASSETTE
TAPE
DECK
<
O
Lu
aa)
Lu
OW
<<
-
Lid
_
=
Lu
Y”)
”
<x
O

10
1}
12
13
14
16
17-18
19-20
21-22
23-24
25-26
27
CONTENTS
REAR/FRONT PANEL
SPECIFICATION
WIRING DIAGRAM
BLOCK DIAGRAM
ADJUSTMENT PROCEDURE
ADJUSTMENT POINT
MICROPROCESSOR CONNECTION DIAGRAM
MICROPROCESSOR TERMINAL DESCRIPTION
CHASSIS-EXPLODED VIEW
CHASSIS-EXPLODED VIEW PARTS LIST
IC BLOCK DIAGRAM
FLUORESCENT INDICATOR TUBE
IC BLOCK DIAGRAM / PACKING VIEW
TAPE MECHANISM-EXPLODED VIEW
PRINTED CIRCUIT BOARD-PARTS LIST
PRINTED CIRCUIT BOARD
SCHEMATIC DIAGRAM
SCHEMATIC DIAGRAM
PRINTED CIRCUIT BOARD
SERVICE SAFETY PRECAUTIONS
Use exact replacement parts for critical locations, marked /\" on parts list.
Return lead dress to original position, and re-install protective covers.
Before returning to customer, test for shock hazard; use either method A or B:
A. Leakage test, "coid”:
1. Unplug AC cord, turn power switch ON.
2.
Connect
one
lead
of
High
Voltage
Insulation
Tester
to
both
prongs
of
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”:
a Plug unit directly into AC outlet; do not use isolation transformer.
2. Connect one lead of Leakage Current Tester to earth ground.
3. Touch other lead to ail exposed metal parts.
4. Leakage measurement must be less than 0.5 milliamps.

SPECIFICATIONS
WARNING:TO PREVENT FIRE OR ELECTRIC
SHOCK,
DO
NOT
EXPOSE
THIS
APPLIANCE
Track
Format:
4-tracks,
2-channels
TO
RAIN
OR
MOISTURE
Erasing
System:
AC
erase
4.8
cm/sec.
(1-7/8
i.p.s.
REAR
PANEL
CONNECTIONS;
WowandFute:
«OO7%(WRMS)
0.09%
(DIN)
Frequency
Response:
20—17,000Hz
(normal)
(30—16,000Hz
+
3dB)
20—18,000Hz
(high)
(30—17,000Hz + 3dB)
20—19,000Hz (metal)
(30—18,000Hz + 3dB)
S/N Ratio: 58dB (metal tape, Dolby NR off)
A noise reduction of 10dB above 5kHz
and 5dB at 1 kHz is possible with Dolby
B NR. A noise reduction of 20dB at
5kHz is possible with Dolby C NR.
Input Jacks: LINE IN: 2
Input sensitivity: 830 mV
Input impedance: 50 kohms
© 1995. NAD ELECTRONICS LTD. 613.
Output Jacks: LINE OUT: 2
1
2
Standard
output
level:
500
mV
1,
INPUT.
3.
NADLINK.
;
(OdB)
2.
OUTPUT.
4.
POWER.
Optimum
load
impedance:
over
50 kohms
The
lightning
flash
with
arrowhead,
within
an
equilateral
tri-
The
exclamation
point
within
an
equilateral
triangle
is
intend-
Headphone
jack:
1
angle
is
intended
to
alert
the
user
of
the
presence
of
unin-
ed
to
alert
the
user
of
the
presence
of
important
operating
Optimum
load
impedance:8
to
sulated
"dangerous
voltage"
within
the
product's
encio-
and
maintenance
(servicing)
instructions
in
the
literature
200
ohms
sure;
that
may
be
of
sufficient
magnitude
to
constitute
a
accompanying
the
appliance
risk
of
electric
shock
to
persons.
Motors:
De
servo
motor:|
DC motor: |
FRONT
PANEL
CONTROLS
Heads:
dai
opera
Hard
Permalloy
x
|
rase head: Ferrite x |
1
19
10
11
578
89
Power
Supply
Rating:
European
models:
AC 230 V, 5OHz
USA and Cadadian models:
AC 120V, 60Hz
Power Consumption: 230V/0.12A 120V/0.24A
Dimensions: 435(W) x 125(H) x 290(D) mm
Stereo Cassette Deck 613 Weight: 5.0 kg. (I 1.0 Ibs.)
OPE RATION- —REPEAT— -DOLBYNA- [COUNTER]
~
LevELWe! 00
Sao aR are
~~ Specifications and external appearance are subject to change
aS emepereadmamnl O)y-O
without notice because of product improvements.
RECOROLEVEL
MPx PLAY TRIM
FILTER DOLBYNR REPEAT
04 at
2 |
© 1995. NAD ELECTRONICS LTD. 613.
[DOLEY & CNAHY FAG]
2 3 4 18 #17 #16 15 14 13 12
1. POWER. 11. RESET.
2.
PHONES.
12.
RECORD
LEVEL.
3.
OPEN
13.
BALANCE.
4,
CASSETTE
COMPARTMENT
14.
BIAS.
5.
STOP.
15.
PLAY
TRIM.
6.
PLAY.
16.
REPEAT.
7.
PAUSE.
17.
DOLBY
NR.
8.
REWIND.
18.
MPX
FILTER.
9.
FAST
FOWARD
19.
DISPLAY
10. RECORD.

WIRING DIAGRAM
Headphone PC board (NAETC-5338-3)
JL301B
JL702A
JL703A
Deck mechanism
Main curcuit PC board (NAAF-5336-3) JL801A
P751 J901
Display curcuit PC board (NADIS-5337-3) Switch PC board (NASW-5339-3)
J902
P9S1 Hil
<=,
Bus line PC board (NAETC-5509-1) JLOOIB : 5902
[| J901 E=pD
Power
supply
PC
board
(NAPS-5340-3)
J
ee
|
LY]
-|i+

BLOCK DIAGRAM
BALANCE INPUT
VOL . .
LINE IN vo
O—> ee 30 (1) Q105 22 (9) > > ©)
16 LINE OUT
OLBY IC
R153 R155 26(4) PGR (15) i LINE} ss amp
P101.
P102
DN
MUTE
:
5 P.B ia b 1 Q601 H.P OUT
aan ae J
I i,
i ae “"p.p Le Q604
<> } ; EN/DE Q107, Q108
o Oo TRIM LEVEL Q1093 Q112
LEVEL
—
ADu.
eae
aoe
7
|
?
R117,
R118
P105
FL TUBE
b REC
R/P LEVEL
70/120
/\ Q113 R403
Q103,q104 REC AMP) pyaga
“ OPERATION
21 ie Ko 4 KEY
ee | - SJ
BIAS see
TRAP REC EQ | | MUTE
Q405~Q410 Q403
Q404 +B1 SIGNAL
Q411 HX PRO
BIAS ACCU
ADJ.
BIAS
|
+82
[>
MECHA
BIAS
MICRO
CONTROL.
+B3
Q412, Q413 PROCESSOR
—B4 FL TUBE
OSC
R461 R471
R462
NAD
©
L407
Q414, Q415
Q702~Q705
MECHA
DRIVE

ADJUSTMENT PROCEDURES
PRECAUTION
1. Before adjustment, clean the following parts
with an alchol moistend swab.
*record/playback head
*pinch roller *capstan
2. Do not use magnetized screwdriver for
adjustment.
3. Demagnetized record/playback head with
a head demagnetizer.
Connection of
instrument
Frequency counter
to LINE output
terminals
AC voltmeter and
oscilloscope to
LINE output
terminals
AC voltmeter to
terminals TP-1
P105
Playback
level
Frequency counter
to P401 lead- Wire
loose coupling
Blank tapes
NORMAL-***UD-1 C-90
HIGHeeeeesXL-II C-90
METAL*e*eXS C-90
Head azimuth screw
*erase head
Line output
freqhevel
Recording
aor
+
the
cena)
NORMAL
level
|
=
™"
|
TAPE
PB
Audio oscillator
Digital frequency counter
Oscilloscope
Attenuater
AC voltmeter
Non-magnetic screwdriver
Test tapes
TCC-153 : 10kHz, -15dB
MTT-111N _ : 3kHz, -10dB
MTT-150
TEST EQUIPMENT/TOOL REQUIRED
: Dolby level calibration
400Hz, tone 200nWb/m
Output
Test tape ; ae Adjustment point} Adjustment. Remarks
indicator
Screw on back
side of Capstan
motor
Freque:
i poe
counter
AC
voltmenter
Fig.2
AC
voltmeter
Frequency
STOP
counter
NORMAL | REC/ AC
TAPE PB | voltmeter
TCC-153 Fig.1
ss R117 (Lich)
Mer R118 (R.ch)
NONE or
METAL
L407
R461 (L.ch)
R462 (R.ch)
REC/ AC
R403 (L.ch)
voltmeter R404 (R.ch)
PLAY torqueseese30~ 70g/cm
FF.REW torque*eee80~ 180g/cm
Back tensionese*se6 ~ 12g/cm
Don't touch these screws.
Fig.1 R/P Head
3,000Hz+10Hz
Maximunm level
& Minimun
phase error at
channels L and R
300mV
107kHz+ 1kHz
O~+1.0dB at
Same level at
REC/PB
1kHz and 10kHz
FT mode will be
active when J147 is
connected to GND.
FT mode will be
active when J147 is
connected to GND.
FT mode will be
active when J147 is
connected to GND.

ADJUSTMENT POINT
Oscilloscope
| P105
R403 dd ar
RECORDING LEVEL
(+) (+)
ee
R117 R118
PLAYBACK
LEVEL
[|
LA07
BIAS
FREQUENCY
C7) pP401
ve
GF
asso
BIAS
CURRENT
LINE VTVM
OUT
Fig.2
0° (IN PHASE) 45° 90° 180°
DOO
Fig.3
Confirming
phase
relationship
Fig.4
MICROPROCESSOR
CONNECTION
DIAGRAM
ENC/DEC
MPX ON/OFF
REC/PB
BIAS.CONT
CAPS
SOL
FF
REW
O-PLAY
DOLBY ON/OFF
DOLBY B/C
SYSTEM RESE
HD404336A33S
(Vdisp) RA1
R23
R22
R21
R20] 60|
| 6 |R71 R13
R72 R12] 58 |
| 8 JROO (SCK) R11
| 9 JRO1 (ST) R10] 56 |
RO2 (SO) R93
RO3 (TOC) R92
TEST R91
RESET R90
rere
Re2{50
+5V LL 7 48 |
N.C [18]
META [30] R30 (ANO) D11,43]
F-REC R31 (AN1) D10
PACK IN [324 R32 (AN2) D9f43]
CrO2
R33
(AN3)
D8
R40 (AN4) D7
NORMAL
R41
(ANS)
D6
HIGH
[264
R42
(AN6)
D5{39]
METAL
R43
(AN7)
(STOPC)
D4
Rch
LEVEL
R50
(AN8)
(BUZZ)
D3
Lech
LEVEL
R51
(AN9)
(EVNB)
D2
KEY2
R52
(AN10)
(INT1)
D1
KEY1
R53
(AN11)
(INTO)
DO
+5V AVecc Vee
—10—
Vdisp
R.SENS
P-OFF
RI-IN
RI-OUT
Seg.a
Seg.b
Seg.c
Seg.d
Seg.e
Seg.f
Seg.g
Seg.h
Seg.i
Seg.j
Seg.k
Seg.l
Grid-7
Grid-6
Grid-5
Grid-4
Grid-3
Grid-2
Grid-1
REC MUT
LINE MUT
BUS LINE
FT
+5V

MICROPROCDSSOR TERMINAL DESCRIPTION
Pt _|encpec | 0 [Deonderincoderdageovroupt SY
[2 [MP ON/OFF | 0 _[Mulipex ter change-overouput SSS
Ps JRECPE | 0 | ReconingPlayback change-overoupat
|
4
~~
‘[BlascoNT)
=
sss
Bias
current
change-over
output
Pears ~~ capstan tr contol out SSS
P68 (480k «dO Soiencid contol cuit SSCSC~S
[Fo Ieet motor contotoupat
REW
O-PLAY
DOLBY ON/OFF
DOLBY B/C
10
— 2
3
4
15
16
SYSTEM RESET
System reset input
Connect the 4MHz ceramic resonator
Ground terminal
Ground terminal for A/D converter
—
w _ — —_ — _
OSC2
Q ie) |
6
20 METAL
Recording/Playback equalizer control outputs
io] Q
nw to co)
lool
22
3
25
PACK IN
N
NORMAL
HIGH
METAL
2 fe) nN
i)
On
On at the high level
Rch level input
Lech level input
nN
Ww
7
2 ‘oO Lch LEVEL
wv oo x ° _ a ies! <
ies c
30
KEY2
Operation
key
input
terminal
31
KEY1
Ww N 5
5
—T1=
—12-—
w ree)
<
Alri wl) tit t+ np Silcaja O|s|a < Z/</F5
5 ||
+4
Operation key input terminal
uw 5
36
7
41-47 Grid
48-59 Seg.
w
nN 1
2
<|P7 (P| 2/2 aln one
3 \ |S) 2} 9
zion
eA 3
lon
6
CHASSIS-EXPLODED VIEW
an
4

IC BLOCK DIAGRAM
utPC1297CA (HX PRO)
HA12142NT (DOLBY NR)
Your 21 Vourz2 Vim (oy
Coutz
=
= wo t
@)
8) PB IN (R)
6) REC/PB
@4) NR IN (R)
@7) BIAS
REC IN(L)(1)
PB IN(L)(3)
C/B/OFF (5)
(6)
NR IN(L)(7)
TA7291S (MOTOR DRIVE)
@3) VREF
@2) PB OUT(R)
VREF (8)
PB OUT(L)(9)
‘CaIOddS
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—14—
—13—

FLUORESCENT
INDICATOR
TUBE
)
BJ337GK
IC
BLOCK
DIAGRAM
)
GRID
ASSIGNMENT
ee
BA6138
(METER
DRIVER)
#PC1228HA
(- OPERATION - r—— REPEAT——. - DOLBY KR —
OO c> (OFFI oS) FACE)
| ene * ~ . . re ——— —_——
LEVEL(dB) -cO -20 -16 -10 8 +4 4 2 0 2 +4 +6 6 48
OooooboeooceooooOnoOoOooOPoOoOoONOoCoCooCoosoebocCoooCooCooCooOOCOoooooooCoOOoOoOoONoEoOoOoOeboDoDoCoOooCKODO
LEFT CK J 000000 SO
(CRG 900000 ccsovcsconncueconnnnseses Joie tate cag eget soos |
(66,76)
8 8 B 8 B7. 8
MHONTNCADATACHDADNCAONTNCDODDNCOONADOOOONDOOLDDDCOCODDOEAcMDCAUAADORN GAD
ouTPuT
PIN CONNECTION i 1 i i i i i 1 ono
(Fin
no.
BASS
50
gee
re
CE
LC
ore
conection
El
blllelblald
lle
eee
eevee gels
INPUT 2
NOTE
1)
Fl,F2
---
Filament
}
2)
NP
------
No
pin
Ay
ese
De
Le
PACKING
VIEW
PARTS
LIST
5)
16*7G
---
Grid
ANODE
CONNECTION
REFNO.
PARTNO.
DESCRIPTION
29052883A Carton
29091636-IBY Pad (L)
2909 1637-I1BY Pad (R)
Sa ce Il Ge
Dnn fF WN
29100034-1Y Poly bag,650 x 850
282301Y Staple !
29110098Y or PP Tape or
29110071Y PP Tape
29361759Y UPC Label
7 Accessary bag ass’y
29342140Y Instruction manual (U7)
261504 Paper tape
29100097-1Y Poly bag,320 x 250
2010244 Pin cord
29365043 Y Warranty card <BI>
NOTE: <AH> : U.S.A., Canadian model only
<B> : U.K. model only
<Bl>_ : Australian model only
<C>: European model only j
—15— —~16—