3-BAND STEREO RADIO
CASSETTE RECORDER
M O D E L N O . C S B 8 Ü Ü E J K l
G E N E R A L
Semiconductors:
Power source:
Power consumption:
Speakers:
Dimension:
Weight:
R A D IO S E C T IO N
Frequency range:
Intermediate frequency:
Sensitivity:
(IH F , T H D 3 % )
(S/N 10 d B)
(S/N 10 d B)
Image rejection:
IF rejection:
Total harmonic distortion
AIWA8
[SERVICE MANUAL]
Code No. 29-880-000-18
DATE OF ISSUE 7/1981
SPECIFICATIONS
17 10s, 1 F ET, 95 transistors,
68 diodes, 7 LED 's, 1 LCD E model
Batteries DC 13.5V (UM-1 x 9)
Back-up power supply (for tuner memory) DC 3V (UM-3, " A A " x 2)
AC 110 ~ 120V/220 ~ 240V switchable 50/60 Hz
K model
Batteries, DC 13.5V (UM-1 or HP-2 x 9) Back-up power supply (for tuner memory)
D C 3 V (U M - 3 o rH P - 7 x 2 ) K model
AC 120V/240V switchable. 50/60 Hz
Car battery (thru car adaptor) E model
42W
K model 39W
14Omm0 x 2 (Woofer) 5Omm0 x 2 (Tweeter)
17Omm0 x 1 (Passive Radiator) 588(W) x 325(H) x 163(D) mm 8.6 kg
FM |
87.5 ~ 108 MHz |
MW |
522 ~ 1,611 kHz |
LW |
146 ~ 353 kHz |
FM |
10.7 MHz |
MW, LW 450 kHz |
|
FM
14 ± 6 dB (at 88.0 MHz)
12 |
± 6 dB |
(at 98.0 MHz) |
12 |
± 6 dB |
(at 108.0 MHz) |
MW |
(at 594 kHz) |
|
47 |
± 5 dB |
|
45 ± 5 dB |
(at 1008 kHz) |
|
42 |
± 5 dB |
(at 14Ó4 kHz) |
LW |
± 5 dB |
(at 155 kHz) |
55 |
||
54 |
± 5 dB |
(at 245 kHz) |
55 |
± 5 dB |
(at 344 kHz) |
FM |
45 |
± 6 dB (at 108.0 |
MHz) |
MW |
41 |
± 5 dB (at 1,404 |
kHz) |
LW |
45 |
± 10 dB (at 344 kHz) |
|
FM |
80 |
±20 dB (at 88.0 |
MHz) |
MW |
27 |
± 5 dB (at 594 kHz) |
|
FM |
Less than 1.5% (at 98 MHz) |
||
MW |
1.7 ± 1.0% (at 1,008 kHz) |
||
FM stereo separation: |
22 ± 3 dB (at 1 |
kHz) |
|
Auto stop level: |
FM |
22 ± 10 dB (at 98 MHz) |
|
|
MW |
60 ± 10 dB (at 1,008 kHz) |
|
|
LW |
65 ± 10 dB (at 245 kHz) |
|
T A PE R E C O R D E R SEC T IO N |
|
|
|
Tape speed: |
4.8 cm/s. ± 3% |
|
|
Recording system: |
AC bias |
|
|
Erasing system: |
AC erase |
|
|
Record bias frequency: |
61 ± 0.5 kHz |
|
|
Distortion: |
Less than 1.5% (PB) |
||
Frequency response: |
Less than 1.5% (REC /PB) |
||
M E T A L tape |
35 ~ 16,000 Hz |
||
|
C r0 2 tape |
35 - 13,000 Hz |
|
Signal to noise ratio: |
LH tape |
35 - 12,500 Hz |
|
More than 49/46 dB |
|||
(Un-welghted) |
|
[DC/AC] |
(PB) |
|
More than 44/42 dB |
||
Erasing ratio: |
|
[DC/AC] |
(REC /PB) |
More than 60 dB |
|||
Separation: |
More than 38 dB (REC/PB) |
||
Output power: |
More than 28W (14W + 14W) |
||
F F & rewind time: |
90 ± 5 s. (at C-60) |
||
Automatic stop system: |
Mechanical auto stop |
||
Pinch roller pressure: |
125 + 15g (1.23 ± 0.15N) |
||
Wow and flutter: |
Less than 0.038% (W R M S) |
||
Take-up torque: |
35 +^g g^cm (343 +^ g mN-m) |
||
F F & rewind torque: |
110 ± 20 g-cm (1078 ± 196 mN-ml |
||
Input terminal: |
M IC 3.5^ jack x 2 |
||
|
PHO NO pin jack x 2 |
||
|
DIN 5P |
|
|
Input sensitivity/impedance: |
|
0.3mV/3kfi |
|
|
M IC |
|
|
|
DIN |
|
500mV/470kfi |
Output terminal: |
PHONO |
|
4mV/47kf2 |
DIN |
|
5P |
|
|
EX T . SP |
3.50 jack x 2 |
|
|
PH O N ES |
6.30 jack |
|
Noise reduction system manufactured under license from Dolby Laboratories Licensing Corporation.
Dolby and the □□ symbol are trademarks of Dolby Labo ratories Licensing Corporation.
Specifications and external appearance are subject to change without notice due to product Improvement.
CS-880E,K j
DISASSEMBLING CHART OF MAIN PARTS
• To avoid troubles when disassembling or replacing the main parts, follow the chart diagram as below.
|
D SL circuit board |
Main cabinet |
Level meter |
|
54 Display circuit board |
|
Dial plate |
|
M S circuit board |
MD-3 mechanism
L AIWA
^-|L__- - ---
2
AIW A J
DISASSEMBLY INSTRUCTIONS
Removing the Main Case
1) Remove 11 screws on the rear lid shown by arrows •
CS-880E,K
Installing the Main Case
1) |
Check that the fibre apper of the REC /PB PC Board (pattern |
|
die) is fixed properly. |
|
Q O I Firmly fix the fibre paper using two-sided tape, etc. |
|
because it is likely to lift up when it is peeled off |
|
once. |
2) |
Lower all the lever switches in the direction of the arrow. |
2) Remove 9 knobs. |
B B H 8 3) Be sure to install in the order (1) — (3). Be careful: when |
|
it is mounted incorrectly, it may damage the dial plate |
|
and the display PC Boards, etc. |
E J ^ 3 ) Open the cassette lid. |
4) Match the knobs while performing item 3) and tapping the |
(It is not required to remove the cassette lid) |
side. |
3
CS-880E,K
IBBHI Removing the radio chassis
1)Be sure to remove the level meter before starting work to
prevent the pointer o f the level meter from being damaged.
2)Loosen the screw and lift up the hook.
3) Remove |
3 screws and lift |
up the radio chassis in the direction |
of the |
arrow. The radio |
chassis, R EC /PB, tuner, MS and |
display PC Boards are removed at that time.
AIWÆ
Installing the radio chassis
1)Hook the jack plate to the tab of the rear lid while paying attention not to pinch the wire. Compress the radio chassis against the direction of the arrow after checking that the tuner PC Board is inserted into the rib.
AIW A ] |
I CS-880E.K |
Removing Mechanism
1) Loosen the screw and remove the hook of the rod. |
2) Remove 4 screws. |
5
CS-880E.K
Cautions on Disassembling MD-3 Mechanism
Disassemble or repair the MD-3 mechanism while paying attention to the springs and levers, etc. shown in the figure below.
Be sure to hook the T-spring (P L A Y lever) to the cam of the gear when installing the gear P L A Y .
Hook it from |
the inside |
of the gear using a clock screwdriver |
as shown in |
the figure. |
Perform the same for the gear F R |
and cam gear P A U S E .
[ A IW A
the lever R E C driver)
6
AIW A J
DESCRIPTION OF THE MD-3 MECHANISM
Description of the P LA Y Operation
W ith |
the plate button |
pressed, the |
trigger lever (P L A Y ) |
moves in |
|||||
the |
direction |
of th e arrow <- (1), the gear |
(P L A Y ) |
is released from |
|||||
the |
boss of the trigger lever |
(P L A Y ) |
engages with the gear flywheel |
||||||
and |
rotates in |
the direction |
of the arrow <- (2), the boss (A) of the |
||||||
gear |
(P L A Y ) |
touches |
the |
trigger |
lever |
(P L A Y ) |
and |
the gear |
|
stops rotating.
Gear, Flywheel
CS-880E,K
When the gear (P L A Y ) rotates, the lever (P L A Y ) moves in the direction of the arrow <- (3) along the cam groove on the rear of the gear to push up the operation chassis in the direction of the arrow «- (4).
The P L A Y button which has been locked is released by pressing the STO P button, the trigger lever (P L A Y ) moves in the direction of the arrow *- (5), the boss (A ) of the gear (P L A Y ) is released and the P L A Y operation stops.
the boss (A) of the gear (P L A Y ).
CS-880E.K -à
Description of the F F Operation
. A IW A
When the |
F F button |
is pressed, the trigger lever F F moves in the |
||
direction |
of the arro w |
(1), the boss of the gear F R cam is released |
||
and engages |
with |
the |
gear wheel to rotate in the direction of the |
|
arrow. <- |
(2), |
the |
boss |
(A ) touches the boss of the trigger lever F F |
and the gear F R cam stops. The |
F R lever B |
moves in |
the direction |
||
of the arrow «- (3) along the |
groove of the gear F R |
cam, the F R |
|||
lever B moves in the direction |
of the arrow <- (3), the |
F R lever C |
|||
compresses the gear of the F R |
|
lever Ass'y |
against the |
Take-up |
|
reel disc ass'y to perform the F F |
operation. |
|
|
|
|
Boss A |
F R lever B |
8
AIW A J
CS-880E,K
REW Operation
When the R E W |
b u tto n |
is pressed, the trigger lever R E W moves in |
||
the direction of |
|
the arrow <- (1) and pushes the lever R E W in the |
||
direction of the |
a rro w |
|
<- (2). The trigger lever F F releases the boss |
|
A of the gear at |
th a t |
time, the gear F R engages with the gear fly |
||
wheel, rotates in |
th e |
direction of the arrow <- (3), boss B touches |
||
the trigger lever F F a n d |
rotation stops. |
|||
The FR |
gear B is moved in the direction the arrow «- (4) by means |
||
of the |
cam |
of the gear F R following the rotation |
of the gear F R , |
pulls the F R |
lever C in the direction of the arrow «- (5) and moves |
||
the F R |
lever ass'y in the direction of the arrow <- |
(6) to rotate the |
|
Take-up reel disc reel disc ass'y to perform the R E W |
operation. |
||
9
CS-880E.K J
[ A IW A
Description of th e P A U SE Operation
When the P A U S E |
button is pressed, the trigger lever P A U S E moves |
in the direction o f |
the arrow *- (1), the boss A of the gear P A U S E |
is released, enages with the gear flywheel and rotates in the direction of the a rro w <- (2), the boss B touches the trigger P A U S E and rotation stops.
The |
P A U S E lever |
moves in the direction of the arrow •*- (3) along |
|||
the |
cam groove of the P A U S E |
gear at that time. The P L A Y idler |
|||
lever and the pinch lever ass'y |
is moved to perform the P A U S E |
||||
operation at that time. |
|
||||
When |
the P A U S E |
button is pressed again, the button is released |
|||
from |
locking |
and |
simultaneously the boss B of the gear P A U S E is |
||
released from |
the |
trigger lever |
P A U S E and the P A U SE operation |
||
10
A IW A J
CS-880E.K
R E C Operation
When the |
R E C |
an d |
P L A Y buttons are pressed simultaneously, |
||
the trigger lever R E C moves in the direction of the arrow +- (1 ). |
|||||
The |
P L A Y |
operation |
is performed simultaneously at that time, |
||
so the R E C |
lever driver moves in the direction of the arrow «- (2), |
||||
pushes the |
lever |
R E C |
A, |
B in the direction of the arrow <- (3), |
|
the |
interlocked |
slide |
R E C |
plate pulls the rod, the slide switch is |
|
operated and the u n it enters the R E C mode.
When |
one of the ST O P, F F and R E W buttons is pressed, the R E C |
trigger |
lever is released from the R E C lever driver and only the |
R E C operation is released.
Gear, Play |
Lever, R E C drive |
Trigger lever, R E C |
11
CS-83QE.K
Description of the Auto-stop Operation
The motor rotation is transmitted to the gear auto-kick of the MD-3 mechanism via the slip pulley F R ass'y.
The slip disk presses the lever auto A in the direction of the arrow <- (1) when the Take-up reel disc ass'y is rotating, so the boss of the lever auto A moves along the cam (A) groove of the gear auto-kick.
When the reel discs (S, T sides) stop, the lever auto A stops in the condition being moves in the direction of the arrow (2).
The cam (B) of the gear auto-kick moves the lever auto A in the direction of the arrow «- (3), operates the plate auto-kick in the direction of the arrow «- (4) to release the plate lock and performs the A U T O STOP operation.
Boss
Cam A
Gear, Auto kick
ip disk, Take-up reel disc ass'y
12
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