Aiwa CS-880UC, CS-880U, CS-880HG, CS-880H Service Manual
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AIWA
G S- H
[SERVICE MANUAL]
Code No. 29-880-000 -78
DATE OF ISSUE 5/1981
SPECIFICATIONS
GEN ER A L
Semiconductors:
Power source:
Power consumption:
Speakers:
Dimension:
Weight:
RAD IO SECTION
Frequency range:
Intermediate frequency:
Sen sitivity:
(IH F , THD 3%)
(S/N 10 dB) 47 ±5 dB
Image rejection: FM
IF rejection:
Total harmonic distortion:
FM stereo separation:
Auto stop level:
68 diodes, 8 LED's, 1 LCD
AC 110 ~ 120V/220 ~ 240V
switchable 50/60 Hz
switchable, 60 Hz
27W
39W
: FM
16 ICs, 1 FE T.9 9 transistors,
Batteries DC 13.5V (UM-1 x 9)
Back-up power supply (for tuner memory)
DC 3V (UM-3, "A A " x 2)
H,HG model
U,UC model
AC 120V/220 ~ 240V
Car battery (thru car adaptor)
H,HG model
U,UC model
14Omm0 x 2 (Woofer)
(5-5/8")
5Omm0 x 2 (Tweeter)
(2" )
17Omm0 x 1 (Passive Radiator)
(6-3/4” )
588(W) x 325(H) x 163(D) mm
[23-1/4" x 12-7/8" x 6-1/2")
8.6 kg (18.6 lbs.)
FM
875 ~ 107.9 MHz
AM
522 ~1,611 kHz
FM
10.7 MHz
AM
450 kHz
FM (H,HG model)
13 ± 6 dB (at 87.9 MHz)
12 ± 6 dB (at 98.0 MHz)
13 ± 6 dB (at 107.9 MHz)
(U,UC model)
14 ±6 dB
13 +
14 ±6 dB
45 ± 5 dB
42 ±
AM 41 ±
FM
AM 31 +
AM
22 ±3 dB
FM
AM
(at 87.9 MHz)
(at 98.0 MHz)
6 dB
(at 107.9 MHz)
(at 594 kHz)
(at 1,008 kHz)
(at 1,404 kHz)
5 dB
5 dB (at 107.9 MHz)
45 ±
5 dB (at 1,404 kHz)
10 dB (at 87.9 MHz)
80 ±
5 dB lat 594 kHz)
than 1.5% (at 98 MHz)
Less
1.0% (at 1,008 kHz)
1.7 ±
(at 1 kHz)
10 dB (at 98 MHz)
22 ±
10 dB (at 1,008 kHz)
60 ±
TA PE REC O RD ER SECT IO N
Tape speed: 4.8 cm/s. ± 3%
Recording system:
Erasing system:
Record bias frequency:
Distortion:
Frequency response:
Signal to noise ratio:
(Un-weighted)
Erasing ratio:
Separation:
Output power:
IFF & rewind time:
Automatic stop system:
Pinch roller pressure:
Wow and flutter:
Take-up torque:
FF & rewind torque:
Input terminal:
Input sensitivity /impedance:
Output terminal: LIN E O UT pin jack x 2
Noise reduction system manufactured under license from
Dolby Laboratories Licensing Corporation.
Dolby and the [Xj symbol are trademarks of Dolby Labo
ratories Licensing Corporation.
Specifications and external appearance are subject to change
without notice due to product improvement.
AC bias
AC erase
61 ± 0.5 kHz
Less than 1.5% (PB)
Less than 1.5% (R EC/PB)
METALtape 3 5 - 16,000 Hz
CrO j 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 39 dB (REC /PB)
H,HG model
More than 24W [12W + 12W)
U,UC model
7 watts per channel,
Min. RM S at 8 ohms,
from 200 Hz to 10 kHz, with
no more than 10%
Total Harmonic Distortion
90 ±5 s. (atC-60)
Mechanical auto stop
125 ± 15q
Less than 0.038% (WRM S)
, , +15
35 c g-c m
-5
110 ± 2 0g
MIC 3.50 jack x 2
PHON O/LINE IN pin jack x 2
MIC 0.3mV/3kfi
LIN E IN 150mV/47kn
PHONO 4mV/47kii
EX T. SP 3.50 jack x 2
PHONES 6.30 jack
CS-880H
,HG,U,UC
DISASSEMBLING CHART OF MAIN PARTS
To avoid troubles when disassembling or replacing the main parts, follow the chart diagram as below.
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Radio chassis
(Including radio chassis, tuning, display MS, A f |
{pattern side) PC Boards)
Tuning circuit board
A F circuit board (Part side) i
MD-3 mechanism
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DISASSEMBLY INSTRUCTIONS
CS-880H,HG,U,UC
Removing the Main Case
1) Remove 11 screws on the rear lid shown by arrows <
-----
— Ö 1-
© o
- Q
2) Remove 9 knobs.
-
rO§"©On
________
-
©<= ”
j—
-
°v=Cj -
-
“□
Installing the Main Case
1) Check that the fibre apper o f the REC/PB PC Board (pattern
die) is fixed properly.
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.
5 0 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.
S g 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-880H,HG,U,UC
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Removing the radio chassis
1) Be sure to remove the level meter before starting work to
prevent the pointer of 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.
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Removing Mechanism
CS-880H,HG,U;UC
1) Loosen the screw and remove the hook of the rod.
2) Remove 4 screws.
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CS-880H,HG,U,UC
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.
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Be sure to hook the T-spring (P LA 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 SE .
the lever RE C driver)
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DESCRIPTION OF THE MD-3 MECHANISM
Description of the PLAY Operation
With the plate button pressed, the trigger lever (P LAY) moves in
the direction of the arrow «- (1), the gear (P LA Y ) is released from
the boss of the trigger lever (P LA Y ) engages w ith 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 LA Y ) and the gear
stops rotating.
CS-880H,HG,U,UC
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 LA Y button which has been locked is released by pressing
the STOP button, the trigger lever (P LAY) moves in the direction of
the arrow *- (5), the boss (A ) of the gear (P LA Ÿ ) is released and the
PL A Y operation stops.
the boss (A ) of the gear (PLA Y ).
CS-880H,HG,U,UC
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Description of the FF Operation
When the FF button is pressed, the trigger lever F F 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
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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 FR
lever B moves in the direction of the arrow «- (3 ), the F R lever C
compresses the gear of the F R lever A » 'y against the Take-up
reel disc ass'y to perform the FF operation.
Boss A
FR lever B
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REW Operation
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[ CS-880H.HG.il.UC
When the RE W button is pressed, the trigger lever REW moves in
the direction of the arrow < - (1) and pushes the lever REW in the
direction of the arrow < - (2). The trigger lever F F releases the boss
A of the gear at that time, the gear FR engages w ith the gear fly
wheel, rotates in the direction of the arrow <- (3), boss B touches
the trigger lever FF and rotation stops.
The FR gear B is moved in the dirSfction the arrow < - (4) by means
of the cam of the gear F R following the rotation of the gear F R;
pulls thè F R lever C in the direction of the arrow < - (5) and moves
the FR lever ass’y in the direction of the arrow ■*- (6) to rotate the
Take-up reel disc reel disc ass'y to perform the REW operation.
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CS-880H,H6,U,UC
Description of the PAUSE Operation
When the P AUS E button is pressed, the trigger lever PA U SE moves
in the direction of the arrow +- (1), the boss A of the gear PA USE
is released, enages with the gear flywheel and rotates in the
direction of the arrow - (2), the boss B touches the trigger P AUSE
and rotation stops.
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The PAUSE lever moves in the direction of the arrow *- (3) along
the cam groove of the PAUSE g e ^ a t that tim e. The P LA Y idler
lever and the pinch lever ass'y is moved to perform the P AUSE
operation at that tim e.
When the P AUS E 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 AUS E and the PA US E operation
Play idler lever Lever, PA U SE
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R EC Operation
When the REC and PL A Y buttons are pressed simultaneously. trjgger |ever js re|eased from the R Ê t ,ever driver and on|y the
the trigger lever RE C moves in the direction of the arrow - (1 ). REC operation is released.
The PL A Y operation is performed simultaneously at that time,
so the R EC lever driver moves in the direction of the arrow <-.(2),
pushes the lever REC A , B in the direction of the arrow (3),
the interlocked slide RE C plate pulls the rod, the slide switch is
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CS-880H,HG,U,UC
When one of the STOP, FF and R E W buttons is pressed, the REC
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CS-880H,HG,U,UC
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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 FR 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.
Boss
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When the reel discs (S, T sides) stop, the lever auto A stops in the
condition being moves in the direction of flle 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 AU TO ST OP operation.
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