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AIWA
[SERVICE MANUAL]
Code No. 29-880-000-78
DATE OF ISSUE 5/1981
SPECIFICATIONS
GENERAL
Semiconductors:
Power source:
Power consumption:
Speakers:
16 ICs, 1 FET.99 transistors,
68 diodes, 8 LED's, 1 LCD 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
AC 110 ~ 120V/220 ~ 240V switchable 50/60 Hz
U,UC model
AC 120V/220 ~ 240V switchable, 60 Hz
Car battery (thru car adaptor) H,HG model
27W
U,UC model 39W
14Omm0 x 2 (Woofer) (5-5/8")
5Omm0 x 2 (Tweeter)
(2 " )
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17Omm0 x 1 (Passive Radiator) |
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Dimension: |
(6-3/4” ) |
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588(W) x 325(H) x 163(D) mm |
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Weight: |
[23-1/4" x 12-7/8" x 6-1/2") |
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8.6 kg (18.6 lbs.) |
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RADIO SECTION |
FM |
875 ~ 107.9 MHz |
Frequency range: |
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Intermediate frequency: |
AM |
522 ~1,611 kHz |
FM |
10.7 MHz |
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Sensitivity: |
AM |
450 kHz |
FM (H,HG model) |
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(IH F, THD 3%) |
13 ±6 dB (at 87.9 MHz) |
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12 ±6 dB (at 98.0 MHz) |
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13 ±6 dB (at 107.9 MHz) |
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(U,UC model) |
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14 ±6 dB (at 87.9 MHz) |
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13 +6 dB (at 98.0 MHz) |
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(S/N 10 dB) |
14 ±6 dB (at 107.9 MHz) |
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47 ±5 dB (at 594 kHz) |
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45 ±5 dB (at 1,008 kHz) |
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Image rejection: |
42 ±5 dB (at 1,404 kHz) |
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FM |
45 ±5 dB (at 107.9 MHz) |
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IF rejection: |
AM |
41 ±5 dB (at 1,404 kHz) |
FM |
80 ±10 dB (at 87.9 MHz) |
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AM |
31 +5 dB lat 594 kHz) |
Total harmonic distortion:: FM |
Less than 1.5% (at 98 MHz) |
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FM stereo separation: |
AM |
1.7 ±1.0% (at 1,008 kHz) |
22 ±3 dB (at 1 kHz) |
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Auto stop level: |
FM |
22 ±10 dB (at 98 MHz) |
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AM |
60 ±10 dB (at 1,008 kHz) |
TAPE RECORDER SECTION |
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Tape speed: |
4.8 cm/s. ±3% |
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Recording system: |
AC bias |
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Erasing system: |
AC erase |
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Record bias frequency: |
61 ±0.5 kHz |
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Distortion: |
Less than 1.5% (PB) |
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Frequency response: |
Less than 1.5% (REC/PB) |
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METALtape |
3516,000 Hz |
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CrOj tape |
35 ~ 13,000 Hz |
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Signal to noise ratio: |
LH tape |
35 ~ 12,500 Hz |
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More than 49/46 dB |
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(Un-weighted) |
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[DC/AC] |
(PB) |
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More than 44/42 dB |
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Erasing ratio: |
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[DC/AC] (REC/PB) |
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More than 60 dB |
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Separation: |
More than 39 dB (REC/PB) |
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Output power: |
H,HG model |
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More than 24W [12W + 12W) |
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U,UC model |
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7 watts per channel, |
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Min. RMS at 8 ohms, |
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from 200 Hz to 10 kHz, with |
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no more than 10% |
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IFF & rewind time: |
Total Harmonic Distortion |
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90 ±5 s. (atC-60) |
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Automatic stop system: |
Mechanical auto stop |
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Pinch roller pressure: |
125 ±15q |
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Wow and flutter: |
Less than 0.038% (WRMS) |
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Take-up torque: |
, , |
+15 |
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35 |
c g-cm |
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FF & rewind torque: |
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-5 |
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110 ±20g |
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Input terminal: |
MIC 3.50 jack x 2 |
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PHONO/LINE IN pin jack x 2 |
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Input sensitivity/impedance: |
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0.3mV/3kfi |
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MIC |
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LIN E IN |
150mV/47kn |
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Output terminal: |
PHONO |
4mV/47kii |
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LINE OUT |
pin jack x 2 |
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EXT. SP |
3.50 jack x 2 |
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PHONES |
6.30 jack |
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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.
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.
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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DISASSEM BLY INSTRUCTIONS
Removing the Main Case
1)Remove 11 screws on the rear lid shown by arrows <
----- |
-rO§"©On- |
- |
— Ö 1- |
-°v=Cj |
|
©<= ” |
-“□ |
- Q © o ________ j—
CS-880H,HG,U,UC
Installing the Main Case
1)Check that the fibre apper of 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.
2) Remove 9 knobs. |
5 0 3 ) Be sure to install in the order (1) — (3). Be careful: when |
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it is mounted incorrectly, it may damage the dial plate |
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and the display PC Boards, etc. |
S g 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. |
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CS-880H,HG,U,UC J |
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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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AIWA I
CS-880H,HG,U;UC
Removing Mechanism
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.
the lever REC driver)
Be sure to hook the T-spring (PLA Y lever) to the cam of the gear when installing the gear PLA 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 PAUSE.
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AIWA J
CS-880H,HG,U,UC
DESCRIPTION OF THE MD-3 MECHANISM
Description of the PLAY Operation
With the plate button pressed, the trigger lever (PLA Y) moves in the direction of the arrow «- (1), the gear (PLA Y) is released from the boss of the trigger lever (PLA Y) engages with the gear flywheel and rotates in the direction of the arrow ■*- (2), the boss (A) of the gear (PLA Y ) touches the trigger lever (PLA Y ) and the gear stops rotating.
When the gear (PLA Y ) rotates, the lever (PLA 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 PLA Y |
button which has been locked is released by pressing |
the STOP button, the trigger lever (PLA Y) moves in the direction of the arrow *- (5), the boss (A) of the gear (PLA Ÿ) is released and the PLA Y operation stops.
the boss (A) of the gear (PLA Y).
CS-880H,HG,U,UC J |
AIWA |
Description o f the FF Operation
When the FF 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
and the gear FR cam stops. The FR 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 FR lever C compresses the gear of the FR 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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[ CS-880H.HG.il.UC |
REW Operation
When the REW 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 FF releases the boss A of the gear at that time, the gear FR engages with 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 FR following the rotation of the gear FR; pulls thè FR 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 J |
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Description of the PAUSE Operation
When the PAUSE button is pressed, the trigger lever PAUSE moves in the direction of the arrow +- (1), the boss A of the gear PAUSE is released, enages with the gear flywheel and rotates in the direction of the arrow - (2), the boss B touches the trigger PAUSE and rotation stops.
The PAUSE lever moves in the direction of the arrow *- (3) along the cam groove of the PAUSE g e^ at that time. The PLA Y idler lever and the pinch lever ass'y is moved to perform the PAUSE operation at that time.
When the PAUSE button is pressed again, the button is released from locking and simultaneously the boss B of the gear PAUSE is released from the trigger lever PAUSE and the PAUSE operation
Play idler lever |
Lever, PAUSE |
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AIWA J
CS-880H,HG,U,UC
REC Operation
When the REC and PLA Y buttons are pressed simultaneously. the trigger lever REC moves in the direction of the arrow - (1).
The PLA Y operation is performed simultaneously at that time, so the REC 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 REC plate pulls the rod, the slide switch is
When one of the STOP, FF and REW buttons is pressed, the REC trjgger |ever js re|eased from the R Ê t ,ever driver and on|y the
REC operation is released.
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CS-880H,HG,U,UC J |
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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.
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 AUTO STOP operation.
Boss
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