Aiwa AD-R450 - service User manual

AIWA S/M Code No. 84-025
DATE OF ISSUE 9/1984
SERVICE MANUAL
STEREO CASSETTE
OECK
M O D E L I M O .
AD-R450
T Y P E . H B jH U B jH J B jC B jE B jK B jG B jZ
SPECIFICATIONS
Type
Track format
Power s pply
Power
cons mption
Freq ency
response
Signal-to-noise
ratio
Wow and fl tter
Tape speed
Rewind time
Fast forward time
Stereo cassette tape dec
4 trac s 2 channels
AD-R450 E, Z
AC 220 V, 50/60 Hz
AD-R450 K, G
AC 240 V, 50/60 Hz
AD-R450 U, C
AC 120 V, 60 Hz
AD-R450 H, HU, HJ
AC 120 V/220 V-240 V switchable,
50/60 Hz
15 W
METAL tape: 20-18,000 Hz
Cr02 position tape: 20— 17,000 Hz
NORMAL tape: 20-16,000 Hz
73 dB (METAL tape DOLBY C NR
ON)
According to DIN 45 500 0.1%
0.04% (WRMS)
4.8 cm/sec. (1 -7/8 tps)
70 sec. (C-60)
70 sec. (C-60)
Recording system
Erase system
Motor
Head
Inp ts
O tp ts
Dimensions
Weight
Accessories
AC bias (frequency 85 Hz)
AC erase
DC Servomotor x 1, DC Motor x 1
DX head
LINE IN maximum input
sensitivity: 50 mV (over 50 fi)
DIN max sensitivity (Z model only):
0.1 mV/ fi (3.3 fi)
LINE OUT standard output level:
0.4 V(0VU); suitable load
impedance: over50 fi;
DIN standard level (Z model only):
0.4 V(0VU)
Headphones: 8—32 ii
420(W) X110(H) x300(D) mm
4.4 g
Stereo pin cord (2)
Design and specifications are s bject to change witho t
notice.
Noise red ction system man fact red nder license
from Dolby Laboratories Licensing Corporation.
Dolby and the □□ symbol are trademarks of Dolby
laboratories licensing corporation.

Follow the instructions carefully, which will allow the user to optimise the products' performance
and ive many years of serivce.
1. No scratch and melting shall be made to covered tead-wires of an
a.c. primary circuit including mains leads.
2. No illegibility shall be given to the specification plate, the cau
tion labels, the fuse labels and others.
3. When, on pattern sides of circuit boards, additional repair-parts
have been made up, the parts shall be firm ly glued to circuit
boards or other components, unless the parts can be attached
firm ly.
4. The following matters shall be maintained as they are, when
repairing.
1) Soldering of lead-wire ends
* Care sho ld be taken of the space distance in an a.c. pri
mary circ it as well as soldering.
2) Wiring and holding of lead-wires with wire-clips and binders
3) Materials of lead-wires
*e.g.; For U L models, lead-wires to be sed shall be ap
proved or accepted by the UL.
4) Location of all kinds of ins lators
5) Setting 6f voltage selector switch
*Set the Voltage Selector Switch to 240V, 220V, or 120V,
According to yo r Local Voltage.
5. After repaired, the insulation resistance or lea age current shall
be measured w ith 500 ± 5V D.C and shall be not less than 1Mi2.
Meas ring Point
Connect to Chassis or O tside 0 of Pin Jack
Rating : More than 1MQ/500V DC Pin Ja c k (0 )
/ CD—
•4» ©
I vir
Chassis (G ) II
AC Power Cord(@ )
6. General instructions fo r mechanism repair
1) The heads, capstan and pinch roller shall be cleaned of good
q ality alcohol after repaired, beca se dirty heads shall ca se
distorted so nds while dirty capstan and pinch roller shall
occ r wow/fl tter and take- p fa lt.
2) When oiling, only one or two drops shall be applied so as
not to r n over and be dispersed. Note sho ld be taken of the
metal fitting for the capstan and rotating portions of the
idlers and pinch roller, especially.
3) E-rings and poly slider washers shall be replaced with new
ones, if once those have been removed. — No re- tilization
d e to nreliability.
4) Reg lar spare-parts shall always be sed for repair, beca se
sing irreg lar parts and tampering with the prod cts shall
ca se deterioration, m lf nction and damage.
2

AIWA®
ELECTRICAL MAIN PART LIST • *-mark means less req ired items and availabilities may be limited.
Symbol No. Part No. Description Symbol No. Part No. Description Symbol No. Part No. Description
< I C > < Ca p a cito r > J 881 ★87 049 297 JACK, 6.3a (HEADPHONES)
87 027 879 AN 6 8 8 2 C 301.302. 87 015 951 lxF 50V A S881 87 031 805 PUSH SWITCH (POWER)
87 020 260 BA 1 2 0 0 3 501.502 ELECTROLYT I C LL
87 020 261 LA 6 3 5 8 S C305.306 87 018 040 4 7 OpF CERAM I C < P I N J A C K C I R C U I T
(4) 82 197 641 LC 6 5 0 2 B 6 3 9 C 309,310, 87 018 044 1 0 0 OpF CERAMIC B O A R D S E C T I O N S
87 020 140 L 7 8M 1 2 701 = E >C C E R T E O R Z
87 027 895 M5 2 1 8 L C365.366 87 018 043 8 2 0 pF CERAMIC PCB E *PIN JACK CIRCUIT BOARD
87 927 986 N J M 4 5 6 0 S C 401,402 87 018 034 1 5 0 pF CERAMIC J 1.2.3.4 ★87 049 420 P I N JACK. 4P (LINE IN/
®87 027 937 TC 4 0 3 0 B P C411 87 014 071 3 9 0 OpF 100V P P REC. LINE OUT/PLAY)
C 413 87 018 137 3 3 0 OpF CERAMIC
< T R A JNT S I S T O R :> C505,506 87 010 231 2 2 0 nF 10V ELECTROLYTIC < V O L U M E C I R C U I T
82 109 521 2 S A 9 5 2 K C507,508 87 012 105 0 . 0 2 2 nF 16V CERAM I C B O A R D S E C T I O I\T >
89 110 155 2 SA 1 0 1 5GR C601 88 336 230 2 2 0 0 «F 25V ELECTROLYTIC PC B F *VOLUME CIRCUIT BOARD
89 309 457 2 SC 9 4 5 LK C602 87 010 232 2 2 0 w F 16V ELECTROLYTIC VR871 82 135 641 SLIDE VOLUME, 5 0kß A
89 318 156 2 SC 1 8 1 5 B L C603 87 010 049 3 3 0pF 5V ELECTROLYTIC (RECORD LEVEL)
89 318 155 2 SC 1 8 1 5 G R C606.607 89 663 815 0.0 1 wF 25V CERAM I C VR872 82 135 642 SLIDE VOLUME. 1 5 0kß W
89 322 406 2 S C 2 2 4 0 BL C704 87 010 139 4 7 </F 10V (REC BALANCE)
89 328 785 2 S C 2 8 7 8 A. B ELECTROLYTIC BP
89 408 805 2SD880GR < A U T O S T O R C I R C U I T
89 413 023 2 SD 1 3 0 2 S . T < D I S ¡ P L A Y C I R C U I T B O A R D S E C T I O N >
B O A R D S E C T I O IST > PCB G *AUTO STOP CIRCUIT BOARD
< M A I ÜNT C I R C U I T B O A R D PCB B *DISPLAY CIRCUIT BOARD C P L 901 87 045 644 PHOTO SENSOR. NJL5 1 4 1 E A
S E C T I O 1ST > D 801,802. 87 027 542 LED, LN2 1 7 RP ( 8 POI NT
PCB A *MAIN CIRCUIT BOARD 803,804. PEAK PROGRAM METER, < S E IST S O R C I R C U I T
D411.412, 87 027 097 D I ODE. 1 S 1 5 5 5 805,806, C TYPE, METAL) B O A R D S E C T I O 1ST >
413.414. 817.819 PCB H *SENSOR CIRCUIT BOARD
701.702. D 807.808. 87 027 543 LED, L N 3 1 7 G P (8POINT CPL902 87 045 644 PHOTO SENSOR, NJL5 1 4 1 E A
703.705 809.810, PEAK PROGRAM METER,
DG01.602. 82 596 799 DIODE. I N 4 0 0 2 (H, HU, H J , 811.812, B TYPE, NORMAL) < T E R M I N A L C I R C U I T
603.604. C . U only) 813.814. B O A R D S E C T I o isr >
706 815.816. = E . PC . G . Z only
D601.602. 87 027 083 DIODE, ISI 8 8 5 (E, K, G, Z 818.821 P C B I 82 135 607 TERMINAL CIRCUIT BOARD
603,604 only) D820 87 027 671 LED. LN4 1 7 YP (Cr02)
D704 87 020 123 DIODE. DS 4 4 6 D822.823 87 020 329 LED. S LP 2 8 4 C 5 1 U (► . < ) < D O E B Y ÜNT R C I R C U I T
L351.352 82 135 631 TRAP COIL, 8 5 K D824,825. 87 020 142 LED, SLP 9 8 4 A 5 1 B O A R 13 S E C T I O N S
L 353,354 87 003 109 COIL. 5 . 6 biH826 ( n . ; d . o > 87 020 132 DOLBY UN I T HA 1 2 0 5 8 J
L 401 82 194 632 BIAS OSC COIL. 8 5 K D827 87 027 097 DIODE, 1S 1 5 5 5 (W/PCB J )
L50f,502 82 135 632 M PX FILTER, 8 5 K
L701 82 196 649 O SC COIL, LC6502 < K E Y B O A R D C I R C U I T < D I N C I R C U I T B O A R D
S501 87 031 788 PUSH SWITCH (DOLBY B C B O A R D S E C T I O N > S E C T I O N > = Z only
NR ON/OFF) PCB C *KEY BOARD CIRCUIT BOARD PCB K 82 160 667 D IN CIRCUIT BOARD
S502 87 031 787 PUSH SWITCH (DOLBY NR D831.832 87 027 732 LED, S G 2 3 5 D (RVS PLAY, D21 87 020 123 DIODE. DS 4 4 6
B C SELECTOR) PLAY) R Y1 84 184 612 LEAD RELAY HA212N
S FR301, 87 021 734 SFR, 1 0 0Q B D833 87 027 733 LED, S Y 4 3 5 D (PAUSE) J 1.2.3.4. ★87 038 054 JACK PLATE A’ssy
302 D834.835 87 027 731 LED. SR53 5D (REC MUTE, 21, S 21 (LINE IN/REC. LINE O U T /
S FR351, 87 021 743 S FR , 2 2kQ B RECORD) PLAY, D 1 N REC/PLAY,
352. D84I.842, 87 027 097 DIODE, 1S 1 5 5 5 INPUT SELECTOR)
501, 843,844,
502 845,846, < Capacitor >
S FR353. 87 021 745 SFR, 4 7kQ B (Z only) 847,848, C3.4 87 018 040 4 7 OpF CERAM 1 C
354 849,850 C7,8 87 018 012 1 5 pF CERAM IC
S FR411 87 021 745 SFR, 4 7kQ B S 841 87 031 850 SLIDE SWITCH (REVERSE
412 MODE) < M I S C E L ]L A J S T E O U S >
VR401 82 135 643 VOLUME. 5 OkQ B S842 87 031 849 SLIDE SWITCH (TIMER) APT951 82 135 611 POWER TRANSFORMER
(BIAS FINE) S 843,844. 87 031 863 TACT SWITCH [REW (► ► ) ,(H, HU, HJ only)
845,846, F.F. (4 4 ) , PLAY, REV PLAY, APT951 82 135 612 POWER TRANSFORMER
< R e sis t o r >847,848, RECORD. STOP. PAUSE. (C. U only)
AFR601 87 029 361 3.3Q 1/2W 849.850 R EC MUTE] APT951 82 135 613 POWER TRANSFORMER
FUSE RES I STOR (E, Z only)
< S W I T C H C I R C U I T APT951 82 135 614 POWER TRANSFORMER
B O A R D S E C T I O !M >£(K , G only)
3PCB D 1jSWITCH C I RCUIT BOARD j RPH, EH ^ 81 50| 601 HEAD RP/E HD 4 2 5 RV
OJ-OÙ i-ltâ- Ö/ö

Symbol No. Part No. Descript ion
M901 87 045 135 MOTOR. DC/EG
M902 81 505 604 REEL MOTOR
S OL901.
902,
903
81 505 603 SOLENO I D, 9ME A
A★87 034 958 AC POWER CORD (H, HU, HJ
only)
A★87 034 578 AC POWER CORD (C, U only)
A★82 187 797 AC POWER CORD (E, Z only)
A★82 187 796 AC POWER CORD (K only)
A★82 187 795 AC POWER CORD (G only)
A★87 085 184 AC CORD BUSH I NG
(H. HU, H J , C, U only)
A★87 085 185 AC CORD BUSHING
(E, K, G, Z only)
S 901,904.
905 81 505 607 LEAF SWI TCHIREC ENA FWD, 'CASSETTE,REC ENA RVS)
S 902,903 81 505 602 LEAF SWITCH (70 (is/120 ws,
M T)
S 906,907.
908 81 505 601 LEAF SWITCHIPAUSE, PLAY, D 1RECTI ON)
AS 951 87 031 853 ROTARY SWITCH (VOLTAGE
SELECTOR) < H, HU, HJ only)
Note; Combination Circ it Board
The parts on the electrical parts list which are indicated by an
asterisk (*) are s pplied as one single combined circ it board.
Therefore, they will not be s pplied separately. If this becomes
necessary,please order the entire circ it board.
Combination circ it board 82-135-601
PCB-A 82-135-602
PCB-B 82-135-603
PCB-C 82-135-604
PCB-D 82-135-605
PCB-E 82-135-606
PCB-F 82-135-608
PCB-I 82-135-607
Combination circ it board 81-506-611
PCB-G 81-506-612
PCB-H 81-506-614
Safety component symbol
This symbol is given to important parts which serve to maintain
the safety of the prod ct, and which are made to conform to special
safety specifications. Therefore, when replacing a component with
this symbol, make absol tely s re that yo se a designated part.
C-MOS IC handling preca tion
The C-MOS IC's constr ction makes this part s sceptible to damage
by static electricity and so take s fficient care in regard to follow
ing articles.
1. Need to be p t on cond ctive sheet, to be p t in a metallic box
and to be wrapped by al mini m foil for transportation and
deposit.
2. To se solder iron less than 40W (less than 260 °C) of power
cons mption for soldering. B t do not overheat more than 10
second.
3. Do not perform a cond ctivity test with a tester, etc. Refer to
the circ it voltages of each part.
4. The ICs on the electrical parts which are indicated by an C-
MOS IC symbol mark ( ($> ).
5

I AD-R 450 ®; kb Bqb Jz ' CB'
P ract ical Service F* i ure
Wow and flutter:
Pinch roller pressure:
Take up torque:
F F and rewind torque:
Playback output:
(T T A 16 1)
R E C / P B output:
( 4 0 0 Hz, 0 V U,
T T A 1 1 9 J )
R E C / P B
distortion:
( 4 0 0 Hz)
Playback noise:
R E C / P B SN ratio:
(Unweighted)
(WTD A)
Erasing ratio:
( 1 2 5 Hz)
B ias frequency:
Frequency response:
According to D IN 45500 0
Less than 0.0 4 5 2$ (WRMS)
2 1 5 ± _2 5g ( 2 . 1 ± 0 . 2 4 N)
mN •
3 5 Í J 5 g-cm (3.4 íj'4 9
1 2 0 ~ 1 8 O-cm (1 1 . 8 ~ 1 7■ m)
6 mN m)
5 4 0 ± 2 OmV
[LINE OUT, D IN OUT (Z only)]
+ 0 . 5 ± 1 . OdB
[LINE OUT. D IN OUT (Z only)]
Less than 2. 5 % (NORMA L)
Less than 3. OmV (NORMAL,, 1 2 0 (iS ,
DOLBY NR OFF)
More than 45 dB (NORMAL, DOL B Y NR
OFF)
More than 45 dB (NORMAL, DOL B Y NR
OFF)
More than 5 5 dB
8 5kHz
3 0 ~
6 0 Hz 1 00 ~ 6 5 0 Hz 1 kHz 2 ~ 1 0kHz 1 3kHz 1 5 kHz 1 6kHz
METAL
■íjjdB ■ ±3dB
t
OdB • ±3dB
i 4 dB + 3 J D
4.6' B + ?dB
— 0
C r 0 2"1 .3dB + ?dB
— 0
NORMAL + ?dB
“ D
I nput level/
impedance:
Output level/
impedance:
Test tape:
LINE IN maximum input sensitivity:
5 0 mV (over 5 0 kQ)
D I N maximum sensitivity (Z only):
0 . 1 mV/kQ (3.3 kQ)
LINE O U T standard output level: 0.4V (0 VU),
suitable load impedance:over 5 0 kQ
D IN standard level (Z only): 0.4 V (0 V U)
Headphones: 8 — 3 2 Q
METAL TT A 1 1 9 MX
NORMAL TT A 1 1 9 J
C r0 2 T T A 1 1 9 G
G

SCHEMATIC DIAGRAM-1 (AD-R450 HB, HUB, HJB, CB, EB, KB, GB, Z models)
1 I 2 | 3 | 4 | 5 I 6 10 11 12 13 14 15 16
Om a in c.e
KEY BOARD
C.B
C0N8

15
JACK C.B
16 17 18 19 20 21
5V
0
IOV
0
22 I23
I50msec
24 25 | 26 27 28 29 30
STOP — PLAY PLAY STOP
5V
5V
0
(OV
0
STOP ^ FF FF > STOP
IOV
0
//
5)
100msec
i—
“““ nf ^ 1 1 1
\ ---- ii ---- 1
STOP PLA Y
5 V
0
FLAY ^STOP
0.5msec
5 V
0r
5V
4.4V
5V
0
3.2 m sec
a .
©
5V
0
5 V
0
5 V
O
IOV
0
lOm sec
UIMJUmJL
|LEADER TAPE LEADER TAPE
T = 0.2 ~ 5 sec
. i 2yk sec
NOTES:
1) | _____ B (+) power s pply
2) Signal path
^ Rec path
3) The voltage is the reference val e meas red with a
tester (20 k-ohms/V DC) when there are no signals.
B t ( ) is with recording.
An asterisk (*) indicates that the val e was meas red
with a vac m-t be voltmeter d ring recording.
4) Resistors with no designation have a rated power of
1/8W and a tolerance of ±5%.
5) Capacitors with no designation have a dielectric strength
of less than 50WV.
6) The only capacitor tolerance indicated are ±5% (J)
and ±10% (K).
7) Ceramic capacitor symbols:
-^l— For temperat re compensation (SL)
—I hr High dielectric constant system (YY)
—II— High dielectric constant system (YW, YP, YZ)
— I— Semicond ctor ceramic
-®)l— For temperat re compensation (SH)
8) Explanation of symbols
(@) Mylar capacitor
® Al min m solid capacitor
(05 Polypropylene film capacitor
(@£5 Bi-polarized capacitor
C p Low-leakage capacitor
E2i Printed resistor
-MW- F se resistor
Safety component symbol
This symbol is given to important parts which serve to
maintain the safety of the prod ct, and which are made
to conform to special safety specifications.
Therefore, when replacing a component with this
symbol, make absol tely s re that yo se a designat
ed part.
• This schematic diagram is s bject to change witho t
notice in the interests of improved performance.
2SA952
2SA1015
2SC945
2SC1815
2SC2240
2SC2878
2SD1302
1 □

WIRING-1 (AD-R450 HB, HUB, HJB, CB, EB, KB, GB, Z models)
1 l 2 I 3 I 4 I 5 10 12 13 14 15 16 17
FROM C0N9 PT951
[A] MAIN C.B
RIBBO N CORD I
El
SWITCH C.B
RIBBON CORO I
PIN JACK C.B
► RIBBON CORO II
S50I
DOLBY B-C
NR ON/OFF
S502
DOLBY NR B-C
SELECTOR
NOTES (1)
(2)H m Earth pattern if f lj j Printed resistor pattern HM !O th ers pattern
The volta e is the reference value measured with a tester (20 K ohms/V DC) when there are no si nals.
An asterisk (*) indicates that the value was measured with a vacuum-tube voltmeter durin recordin .
11 The ICs on the electrical parts which are indicated by an C- MOS IC symbol mark ( ).
12

WIRING-2 (AD-R450 HB, HUB, HJB, CB, EB, KB, GB, Z models)
1 ! 2 I 3 I 4 I 5 t 6 I 7 I 8 I 9 | 10 | 11 I 12 I 13 | 14 | 15 | 16 | 17 | 18 I _____ 19 [
1=3 DISPLAY C.B
C0N8 S845.D832 |< PLÀyI
S848 I STOPI S846.D83I r> REV PLŸ1 S843 ( M> | S842 I tÍMERIS847.D835 IRECORDI
S850.D834 IREC MUTEl
S844 I QQ 1
S849.D833 I PAUSE 1
S841
r e v e r s e m ode 1 [cl KEY board c. bCHASSIS EARTH CHASSIS EARTH
[k] DIN C. B (Z ONLY)
-sa.4a.
DS4b
Sec
0MAIN C.B
RIBBON CORD III
ES MAIN C.B
RIBBON CORD I
□ TERMINAL C.B
(E, G, K, Z ONLY)
<ORG
INPUT
SELECTOR LINE OUT/ PLAY DIN REC/PLAY
C0N4
0 MAIN C.B
< BRN>
S904
(CASSETTE) S903 q^ S902
(METAL) (STOP PLAY)(70>is/ I20jjs )
8.8~9.IV
— ----- (RWD, FF)
M902 M901
S90I
(REC ENA. FWD.) (H , HU, HJ MODELS ONLY)
RPH90J/EH90I
(R/P/E HEAD) VOLTAGE
SELECTOR
(CAPSTAN\
I MOTOR )
f REE L \
i m o t or;
>20~240V
C0N9 E SWITCH C.B
120V
S907
(PLAY)
L J S0L902
(PLAY)
S906
(PAUSE)
SOL90I(R VS)
S908
(DIRECTION)
S0L903
(PAUSE)
MECHA
EARTH AC 120V/220V/240V
50/60HZ (H.H U.HJ ONLY)
( U,C,E, K.G.Z MODELS ONLY)
(E,Z ,K ONLY)
(G ONLY) -veo
(U,C ONLY) CON 9
E SWITCH C.B
<?ÜÑ"¡
To BM AIN C.B
C0N2 C0N3
ToHMAIN C.B C0N7
ToHMAIN C.B
5^ % IG0NLY)
S Ä (K °NLY)
ED SENSOR C.B
CPL90I
ED AUTO STOP C.B AC220V ip 7 ONLY)
50/60HZ UNLT '
NOTES (1) l ll ff l Earth pattern H iiH I Printed resistor pattern M M Others pattern
(2) The volta e is the reference value measured with a tester (20 K ohms/V DC) when there are no si nals.
An asterisk (*) indicates that the value was measured with a vacuum-tube voltmeter durin recordin . I T = E o ^ d t (U,C ONLY)

SCHEMATIC DIAGRAM-2 (AD-R450 HB, HUB, HJB, CB, EB, KB, GB, Z models)
_____ 1 I 2 _______ I ________ 2 _______ | ________ 4 _____ J ________ 5 _______ 1 6
A
10 11 12
17 18

A D - R 4 5 0 H bB ;H bUB,hJzB ,c b JIAD-R450 g®; kb Bgb,Jz 'CB' AD-R450 kb Bqb Jz' CBJAIWA
ADJUSTMENT
8. Bias Oscillation Freq ency Adj stment
Settings: •Adj stment location:!. 4 0 1
Method: Set no the R E C mode, and adj st L 4 0 1
for 8 5 kHz.
6. R E C / P B Freq ency Response Adj stment
Settings: • 'Pest tan e:TT A- 1 1 9 J
• T e s tp o in t:L I N E O U T
• 1 np t: L 1 N E IN:! kHz & 10 kHz. 33 dB
• Dolby N R S W : O F F
■Adj stment location: S F R 4 1 1 ( L c h)
S F R 4 1 2 ( Rch)
Method: Record the 1 kHz & 10 kHz. 33 dB
signals and adj st the R E C vol me for
40 mV o tp t, then play back the recorded
tape and adj st so that the o tp t difference
betseen 1 kHz and 10 kHz is 0 . 5 ± 0 . 5
dB or less.
7. R E C / P B Freq ency Response Adj stment
(Z MODEL ONLY)
S ett i ngs: • Test tape: T T A - 1 1 9 D
• Test point: I. I N E O U T
• I np t: I. I N E I N : 1 kHz 10 kHz. 33 dB
• Dolby N R S W : O F F
■ Adj stment location: S F R 3 5 3 ( Lch)
S F R 3 5 A (Rch)
Method: Record the 1 kHz & 10 kHz. 33 dB
signals and adj st the R E C vol me for
40 mV o tp t, then play back the recorded
tape and adj st so that the o tp t difference
between 1 kHz and 10 kHz is 0 . 5 ± 0 . 5 dB
or less.
5. R E C / P B Gain Adj stment
Settings: • Test tap e:TTA- 1 1 9 J
• Test point: L I N E O U T
• I np t .-LINE ! N : I k Hz , 33 d B
■ Dolby N R S W : O F F
• Adj stment locat ion: S F R 3 5 1 ( Lch)
S F R 3 5 2 (Rch)
Record the 1 kHz. 33 dB signal and
adj st the R E C vol me for 40 mV o tp t,
then play back the recorded tape and adj st
so that the o tp t difference is 0 — 1-0.5
compared with the R E C mode.
Method:
3 . P B Gain Adj stment
S ett i ngs: «Test tape:TT A- 1 6 1
• Test point : L I N E O U T
• Dolby N R SW:OFF
• Adj stment location: S F R 5 0 1 (Lch)
S F R 5 0 2 (Rch)
Method: Adj st so that the o tp t is 540 ± 10 m V .
4. P B Freq ency Response Adj stment
Sett i ngs: -Test tape: T T A - 3 1 7 E
• Test point: L I N E O U T
• Dolby N R SW:OF F
• Adj stment location: S F R 3 0 1 ( Lch)
S F R 3 0 2 (Rch)
Method: Play back the test tape, then adj st so
that the o tp t difference between 1 kHz
and 10 kHz is 0 . 5 ± 0 . 5 dB or less.
9. Bias Trap Co il Adj stment
Settings: "Adj stment [ oca t i on: L 3 5 1 (Lch)
L 3 5 2 (Rch)
Method: Adj st L 3 5 1 . 3 5 2 for minim m leakage.
20

☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ M E M O ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆
21

EXPLODED VIEW-1
1 I 2 1 3
B
H
22

PARTS LIST
MECHANICAL PARTS LIST ® *-mark means less req ired items and availabilities may be limited.
Part No.
changed to Ref. No. Part No. Description Common
Model 0’ ty
1 1 82 197 008 C A S S ETTE BOX FX 9 0 1
1 2 ★82 135 010 CASSETTE PLATE R •X 1
1 3 ★82 135 011 CASSETTE WINDOW R « 1
1 4 ★82 192 218 P SPR1NG. CASSETTE HOLDER FX 3 0
1 5 ★82 135 210 T SPR I NG. EJECT 1
1 6 ★82 135 002 FRONT CABINET X 1
1 7 ★82 135 004 FRONT PANEL R 1
1 8 82 192 040 KNOB B FX 3 0 1
1 9 ★82 135 005 FRONT PANEL FR « 1
1 10 82 194 005 KNOB.REC AD F330 1
1 11 ★82 194 012 GUIDE.VR AD F330 1
1 12 82 194 006 KNOB,BALANCE AD F330 1
1 13 ★82 135 007 TOUCH KEY, STOP C * 1
1 14 ★82 199 009 TOUCH KEY, PLAY AD R550 1
1 15 ★82 648 025 LABEL.TAPE INDICATION HS F 0 1 1
1 16 ★82 135 003 FRONT PANEL L 1
1 17 ★82 135 006 METER, WIND OW *
1 18 ★87 040 172 COUNTER 1
1 19 82 135 013 KNOB.TIMER * 2
1 20 ★82 135 014 BOTTOM COVER *• 1
1 21 ★82 135 206 GUIDE. LED Si 1
1 2 2 ★87 081 903 STOPPER RING, CS 2 1
1 2 3 ★82 135 209 C SPRI NG. E J ECT 1
1 2 4 82 135 008 EJECT KNOB 1
1 2 5 ★82 683 212 HOLDER, OI L DAMP 1
1 2 6 ★82 175 207 O I L DAMP BEAR I NG AD 3 5 0 0 1
1 2 7 ★82 534 264 GEAR, O I L DAMP 1
1 2 8 82 188 012 KNOB,POWER 1
1 2 9 ★87 055 055 FOOT 4
1 3 0 ★82 199 012 STEEL CAB I NET AD R550 1
1 3 1 ★87 085 083 NYLON RIVET 3 5.5 (HB, HUB, 2
H J B only)
1 3 2 ★82 542 209 BELT. COUNTER I
1 3 3 ★82 197 203 HOLDER,MECHANISM FX 9 0 1
1 3 4 ★82 135 218 SLIDE VOLUME R * 1
1 3 5 ★82 135 208 SLIDE VOLUME L *1
1 3 6 ★82 135 207 HOLDER, CIRCUIT BOARD * 1
1 3 7 ★82 135 205 ROD,B/C Si 1
1 3 8 ★82 135 012 PUSH BUTTON, DOLBY *2
1 3 9 82 135 204 ROD,ON/OFF 1
1 4 0 ★87 085 102 NYLON RIVET 3.5 5.5 <Z only) 4
1 4 1 ★87 085 184 CORD BUSHING (HB, HUB. HJB, CB 1
only)
★87 085 185 CORD BUSHING (EB, KB, GB, Z only) 1
1 4 2 ★87 034 958 AC POWER CORD (HB, HUB. HJB only) 1
★87 034 578 AC POWER CORD (CB only) 1
★82 187 797 AC POWER CORD (EB. Z only) AD 31 50 1
★82 187 796 AC POWER CORD (KB only) AD 31 50 1
★82 187 795 AC POWER CORD (GB only) AD 3 1 50 1
23

2 4

Part No.
changed to Ref. No. Part No. Description C ommon
Mode! Q’ty
2 1
2 2
2 3
2 4
2 5
★81 506 201
★81 505 242
★81 505 239
★81 505 273
★81 505 241
OUTSERT CHASS I S Ass’y
LEVER,METAL
EJ ECT, LEVER
T SPRING, LID LOCK
REC BLOCK I NG LEVER
I
1
1
1
2 6
2 7
2 8
2 9
2 1 0
★81 505 260
★81 505 268
★87 073 005
★81 505 238
★81 505 274
P SPRING,CASSETTE HOLDER
T SPRING,SLIDE BLAKE
STEEL BALL
BLOCKING PLATE, EJECT
C SPR I NG, SUPPLY REEL
PLATFORM
1
1
1
1
2 1 1
2 1 2
2 1 3
2 1 4
2 15
★81 506 239
★82 303 398
★81 506 240
★81 506 227
★81 505 240
SUPPLY REEL PLATFORM RP Ass’y
CAP, TAKE UP REEL PLATFORM
TAKE UP REEL PLATFORM FP Ass’y
C SPRING,REEL PLATFORM
LEVER. CASSETTE SENSOR
1
1
1
1
2 16
2 17
2 1 8
2 1 9
2 2 0
★81 505 270
★ 81 506 236
★ 81 506 274
★81 505 265
81 506 238
T SPRING, IDLER LEVER
GUIDE,TAPE
GU I DE. LIGHT
E SPRING,ACTUATING CHASSIS
ACTUATING CHASSIS Ass’y
1
1
1
1
1
2 2 1
2 2 2
2 2 3
2 2 4
2 2 5
★81 507 224
★81 506 348
★81 506 219
★81 506 237
★81 506 319
P SPRING,ACTUATING CHASSIS
T SPR I NG, SEGMENT
GEAR,SEGMENT
GEAR, HEAD HOUS ING
HEAD BASE Ass’y
1
1
1
1
1
2 2 6
2 2 7
2 2 8
2 2 9
2 3 0
★81 506 220
★81 506 208
★81 506 230
81 506 293
★ 87 038 056
T SPRING, IDLER LEVER R
HEAD HOUSING Ass’y
ADJUST SCREW,AZIMUTH
C SPRING, AZ I MUTH
WIRE BINDER
1
1
1
2 3 1
2 3 2
2 3 3
2 3 4
2 3 5
★81 505 266
★81 506 301
★81 506 281
★81 506 203
★81 505 344
E SPRING, PAUSE PLATE
PLATE, PAUSE
PLATE. PINCH LEVER R
SELECT LEVER, PINCH ROLLER
I DLER LEVER Ass’y
1
1
1
1
2 3 6
2 3 7
2 3 8
2 3 9
2 4 0
★81 506 275
★81 506 222
81 506 311
★81 506 276
★81 505 236
PINCH LEVER FG Ass’y
T SPRING, PI NCH FG
C SPRING
PINCH LEVER RG Ass’y
LEVER, SLID E BRAKE
1
1
1
1
1
2 4 1
2 4 2
2 4 3
81 505 237
★81 506 223
★81 506 215
FELT
T SPRING, PINCH RG
SLIDE LEVER,HEAD SELECT 1
1
2 5

EXPLODED VIEW-3
1 I 2 I 3
Ref. No. Part No. Description
A87-261-075-21 V+ 2 . 6 - 1 0
B87-351-034-21 V T , + 2 — 5
C81-505-341-01 VPT+ 2 .6-31.5
D87-512-074-21 VFTî+2 . 6 - 8
E87-351-034-21 PW 2.6 — 8 — 0.1 3
F 82-416-358-01 P W 2 . 5-6-0.25
2 6

Part No.
changed to Ref. No. Part No. Description C oromon Model 0’ ty
3 1 ★81 505 230 PLAY LEVER 1
3 2 ★81 505 234 GEAR. PLAY CAM 1
3 3 ★81 505 231 TRIGGER LEVER. PLAY 1
3 4 ★81 505 272 T SPR I NG. CAM 1
3 5 ★81 505 232 PAUSE LEVER 1
3 6 ★81 505 283 T SPRING, PAUSE LEVER 1
3 7 ★81 505 235 GEAR. PAUSE CAM 1
3 8 ★81 505 233 TRIGGER LEVER. PAUSE 1
3 9 ★81 506 214 REVERS E LEVER 1
3 10 ★81 506 221 T SPRING, REVERSE LEVER 1
3 1 1 ★81 506 241 GEAR.REVERSE 1
3 12 ★81 506 242 TRIGGER LEVER. REVERSE 1
3 13 ★81 506 216 LEVER,ACTUATING CHASSIS 1
3 14 ★81 505 269 T SPRING.PINCH PLATE 1
3 15 ★81 505 271 T SPRING,TRIGGER LEVER 1
3 1 6 ★81 505 204 MECHANI SM CHASSIS B 1
3 17 ★81 505 282 T SPRING. FR IDLER 1
3 18 ★81 505 254 I DLER LEVER FR A 1
3 19 ★81 505 301 FR IDLER Ass’y 1
3 20 26 09 047 198 REEL MOTOR Ass’y 1
3 2 7 ★87 081 483 MOTOR S CREW, M2 . 6 3
3 2 8 ★87 087 029 RUBBER CUSH I ON 3
3 2 9 ★81 506 202 HOLDER. MOTOR 1
3 3 0 ★82 565 334 MOTOR PULLEY 1
3 3 1 ★82 565 373 THRUST S CREW 2
3 3 2 ★81 506 287 FLYWHEEL RB Ass’y 1
3 3 3 ★81 506 243 GEAR.FLYWHEEL 1
3 3 4 ★81 506 228 C SPRING. FLYWHEEL R 1
3 3 5 ★81 506 205 FLYWHEEL F Ass’y 1
3 3 6 81 506 229 RUBBER BELT. 3 H 1
3 3 7 ★81 505 225 GEAR. FLYWHEEL 1
3 3 8 ★81 505 261 C SPRING, FLYWHEEL F 1
3 3 9 ★ 87 038 039 WIRE BINDER 1
3 4 0 81 505 246 RUBBER.DRIVE 2
27

■ ACCESSORIES/PACKAGE LIST
Part No.
changed to Ref. No. Part No. Description C ommon
Model Q’ty
1 82 135 901 BOOKLET, INSTRUCTION * 1
2★87 049 137 SIEMENS PLUG (H, HJ only) 1
3 ★87 034 978 CONNECTION CORD CW 2 5 4BSK 2
482 135 851 BOX, GIFT (H, HU, C, K, G, Z only) *1
82 135 854 BOX, GIFT < H J , E only) *1
20

☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ MEMO
2a