Aiwa CS-880K, CS-880E Service Manual

3-BAND STEREO R AD IO

CASSETTE RECOR DER

MODEL N O . C S b 8 Ü Ü E j K l

AIWA8

[SERVICE MANUAL]

Code No. 29-880-000-18

G E N ER A L
Semiconductors:

Power source:

Power consumption:

Speakers:

Dimension:

Weight:

RA D IO S EC T IO N
Frequency range:

Intermediate frequency:

Sensitivity:

(IH F, TH D 3% )

(S/N 10 dB )

(S/N 10 dB )

Image rejection:

IF rejection:

Total harmonic distortion

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)

DC 3V (U M - 3 orH P- 7 x2 )
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

87.5 ~ 108 MHz

FM

522 ~ 1,611 kHz

MW

146 ~ 353 kHz

LW

10.7 MHz

FM

LW 450 kHz

MW,
FM

6 dB (at 88.0 MHz)

14 ±

6 dB (at 98.0 MHz)

12 ±

6 dB (at 108.0 MHz)

12 ±

MW

5 dB (at 594 kHz)

47 ±

5 dB (at 1008 kHz)

45 ±

5 dB (at 14Ó4 kHz)

42 ±

LW

5 dB (at 155 kHz)

55 ±

5 dB (at 245 kHz)

54 ±

5 dB (at 344 kHz)

55 ±

45 ± 6 dB (at 108.0 MHz)

FM

41 ± 5 dB (at 1,404 kHz)

MW

45 ± 10 dB (at 344 kHz)

LW

80 ±20 dB (at 88.0 MHz)

FM

27 ± 5 d B (at 594 kHz)

MW

Less than 1.5% (at 98 MHz)

FM

1.7 ± 1.0% (at 1,008 kHz)

MW

DATE OF ISSUE 7/1 981

FM stereo separation:
Auto stop level:

TA PE R EC O RD E R SEC TIO N
Tape speed:
Recording system:
Erasing system:
Record bias frequency:
Distortion:

Frequency response:

Signal to noise ratio:

(Un-welghted)

Erasing ratio:
Separation:
Output power:
FF & rewind time:
Automatic stop system:
Pinch roller pressure:
Wow and flutter:

Take-up torque:

FF & rewind torque:
Input terminal:

Input sensitivity/impedance:

Output terminal: DIN

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.

22 ± 3 dB (at 1 kHz)
FM 22 ± 10 dB (at 98 MHz)
MW 60 ± 10 dB (at 1,008 kHz)

LW 65 ± 10 dB (at 245 kHz)

4.8 cm/s. ± 3%
AC bias
AC erase
61 ± 0.5 kHz

Less than 1.5% (PB)

Less than 1.5% (REC /PB)
M E T A L tape 35 ~ 16,000 Hz
Cr0 2 tape 35 - 13,000 Hz

LH tape 35 - 12,500 Hz
More than 49/46 dB

[DC/AC] (PB)

More than 44/42 dB

[DC/AC] (REC /PB)
More than 60 dB
More than 38 d B (REC/PB)
More than 28W (14W + 14W)
90 ± 5 s. (at C-60)
Mechanical auto stop
125 + 15g (1.23 ± 0.15N)
Less than 0.038% (W RM S)

35 +^g g^cm (343 +^ g mN-m)
110 ± 20 g-cm (1078 ± 196 mN-ml

MIC 3.5^ jack x 2
PH ONO pin jack x 2
DIN 5P

MIC
DIN
PHO NO

EXT . SP
PHO N ES

0.3mV/3kfi
500mV/470kfi
4mV/47kf2
5P

3.50 jack x 2

6.30 jack

CS-880E,K j

DISASSEMBLING CHART OF MAIN PARTS

• T o avoid troubles when disassembling or replacing the main parts, follow the chart diagram as below.

DSL circuit board

L AIWA

^-|L__- -

---

Main cabinet

Level meter

54 Display circuit board

Dial plate

MS circuit board

MD-3 mechanism

2

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DISASSEMBLY INSTRUCTIONS

CS-880E,K

Removing the Main Case

1) Remove 11 screws on the rear lid shown by arrows •

2) Remove 9 knobs.

Installing the Main Case

1) Check that the fibre apper of the RE C/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.

BB H 83) 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.

(It is not required to remove the cassette lid)

4) Match the knobs while performing item 3) and tapping the

side.

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CS-880E,K

AIWÆ

IBBHI

1) Be sure to remove th e level meter before starting work to

2) Loosen the screw and lift up the hook.

Removing the radio chassis

prevent the pointer o f the level meter from being damaged.

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.

3) Remove 3 screws and lift up the radio chassis in the direction
of the arrow. The radio chassis, REC /PB, tuner, MS and
display PC Boards are removed at that time.

AIWA ]

Removing Mechanism

CS-880E.K

I

1) Loosen the sc rew and remove the hook of the rod.

2) Remove 4 screws.

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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.

[ AIW A

Be sure to hook the T-spring (PL A Y lever) to the cam of the
gear when installing the gear P LA Y.

Hook it from the inside of the gear using a clock screwdriver
as shown in the figure. Perform the same for the gear FR
and cam gear P AU S E.

the lever R E C driver)

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DESCRIPTION OF THE MD-3 MECHANISM

Description of the P LA Y Operation

With the plate b utton pressed, the trigger lever (P LA Y ) moves in

the direction of the arrow <- (1), the gear (P L A Y ) is released from
the boss of the trigger lever (PL A Y ) engages with the gear flywheel
and rotates in the direction of the arrow <- (2), the boss (A) of the
gear ( P LA Y ) touches the trigger lever (P LA Y ) and the gear
stops rotating.

CS-880E,K

When the gear (P LA Y ) rotates, the lever (PL 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 STOP button, the trigger lever (PL A Y) moves in the direction of
the arrow *- (5), the boss (A ) of the gear (PL A Y) is released and the
PL A Y operation stops.

Gear, Flywheel

the boss (A) of the gear (PL A Y).

CS-880E.K

- à . AIW A

Description of the F F Operation

When the F F button is pressed, the trigger lever FF moves in the
direction of the arrow (1), the boss of the gear FR 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 FF

Boss A

FR lever B

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 FR cam, the F R
lever B moves in the direction of the arrow <- (3), the FR lever C
compresses the gear of the FR lever Ass'y against the Take-up
reel disc ass'y to perform the F F operation.

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AIWA

REW Operation

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CS-880E,K

When the R EW bu 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 ar ro w <- (2). The trigger lever F F releases the boss
A of the gear at th a t time, the gear FR engages with the gear fly 
wheel, rotates in th e direction of the arrow <- (3), boss B touches
the trigger lever F F a nd rotation stops.

The F R gear B is moved in the direction the arrow «- (4) by means
of the cam of the gear FR following the rotation of the gear FR ,
pulls the FR 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 EW operation.

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CS-880E.K

J [ AIW A

Description of th e PAU SE Operation

When the P A U S E button is pressed, the trigger lever P A U SE moves

in the direction o f the arrow *- (1), the boss A of the gear P A U SE
is released, enages with the gear flywheel and rotates in the
direction of the ar row <- (2), the boss B touches the trigger P A USE

and rotation stops.

The PA U S E lever moves in the direction of the arrow •*- (3) along
the cam groove of the PA U SE gear at that time. The P LA Y idler
lever and the pinch lever ass'y is moved to perform the P A US E
operation at that time.
When the PA U SE button is pressed again, the button is released
from locking and simultaneously the boss B of the gear PA U SE is
released from the trigger lever P AU S E and the P A US E operation

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AIW A

REC Operation

When the R E C a nd PL 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 EC lever d river 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 un it enters the R EC mode.

J

CS-880E.K

When one of the ST OP , F F and RE W buttons is pressed, the R EC
trigger lever is released from the R EC lever driver and only the
RE C operation is released.

Gear, Play Lever, RE C drive Trigger lever, RE C

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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 th e 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.

Boss

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 UTO STO P operation.

Cam A

Gear, Auto kick

ip disk, Take-up reel disc ass'y

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