Akai AC-R17-W Service Manual
MOBILE AUDIO SYSTEM
RP T
3
RN D
4
P
A
U
1
S
C
N
2
D
C
5
D
C
6
AUX
IN
CD OP E N/CL O S E/E J
LOC
AS/PS
LOUD
MODE
EQ
CLAS
POWER
3 i n 1 C D C A S S E T T E R E C E I V E R
ST
PO WE R
TUNE/TRACK SKIP
BAND
EQUALIZER
TA PE OPE N /CL OSE
TRK
RPT
DISC
MO/ST
IR
ADJUST
DSP
AUDIO
PUSH
SELECT
E
T
U
M
U
O
L
MODEL: AKAI ACR-17W
CONTENTS
Page
Disassembly Instructions................................................................................................................................... 3
Disassembly Diagram........................................................................................................................................ 4
Operation check.................................................................................................................................................5
Block Diagram ...................................................................................................................................................6
Alignment Locations ..........................................................................................................................................7
Alignment Procedures .......................................................................................................................................8
Printed Circuit Boards........................................................................................................................................ 9
Wiring Diagram ................................................................................................................................................ 18
Exploded Views (Panel) ..................................................................................................................................19
Exploded View Parts Lists (Panel) ..................................................................................................................20
Exploded Views (Cabinet) ............................................................................................................................... 21
Exploded View Parts Lists (Cabinet) ............................................................................................................... 22
Exploded View (Deck) .....................................................................................................................................24
Exploded View Parts List (Deck) .....................................................................................................................25
Schematic Diagram .........................................................................................................................................27
Electrical Parts List .......................................................................................................................................... 30
Specifications................................................................................................................................................... 37
2
DISASSEMBLY INSTRUCTIONS
1. Remove the screw (A) located on the rear of the top cabinet then remove the Top Cabinet.
2. Remove four screws (B) located on the CD bracket and remove two screws (C) from the Heat Sink of the left
side.
Remove four screws (D) from under the CD bracket then remove the CD Deck and the CD Bracket.
3. Remove four screws (E) located on the tape bracket and remove four screws (F) from under the tape
bracket then remove the Tape Bracket.
4. Remove two screws (G) from each side of the panel then remove two the Tube.
5. Take out the Panel Slide Way (L/R), The Ring and the Panel.
Remove two screws (H) from the Base of the front and remove two screws (I) from each side of the Base
then remove the Base.
6. Remove two screws (J) from on the front bracket then remove the Front Bracket.
7. Remove two screws (K) and two screws (L) from the Heat Sink of the left side then remove the IC Bracket
(7809) and the IC Bracket 8568.
8. Remove the screw (M) from the heat sink then remove the Heat Sink.
9. Remove two screws (N) from the Slide Bracket then remove the Slide Gear and the Slider Bracket.
Remove two screws (O) from the “U” Cabinet then remove the Bracket Slide Way.
10. Remove the screw (P) from the “U” cabinet of the left side and remove two screws (Q) then remove the
Gear Holder.
11. Remove two screws (R) from the “U” Cabinet then remove the Gear Bracket ASS’Y.
12. Remove the screw (S) and the screw (T) from the Rear Bracket then remove the Antenna Clip and the
Antenna Socket J-02-03 Signal. Hole.
13. Remove the screw (U) and two screws (V) from the Rear Bracket then remove the CDC FIX Bracket.
14. Remove two screws (W) from the “U” Bracket of the left side then remove the Rear Bracket and the “U”
Cabinet.
3
DISASSEMBLY DIAGRAM
4
OPERATION CHECK
GENERAL SPECIFICATIONS OF SIGNAL
Standard frequency
Signal output
Modulation
AF output level FM/MW/LW
Power source voltage DC 14.0V (Backup voltage is the same as this)
AF load impedance 4 ohm pure resistance
Balance Center position of level
Tone Center position
The signal strength read in this section is voltage on the antenna.
Test Diagram
FM
MW
LW
FM
MW
LW
MW
FM Stereo
98.1 MHz (87.5, 108 MHz)
1000 kHz (522, 1620 kHz)
200 kHz (144, 288 kHz)
1mV
5mV
5mV
400 Hz 30% MOD.
1 kHz 75 kHz DEV.
90% for L only or
R only pilot level 10%
5
BLOCK DIAGRAM
6
FM/MW/LW TUNER
ALIGNMENT LOCATIONS
7
ALIGNMENT PROCEDURES
FM ADJUSTMENT
Equipment Required
z AM IF/RF signal generator
z Solid-state voltmeter (SSVM)
z Regulated DC power supply
z 2-CH voltmeter
z Distortion meter
FM Alignment Using FM Signal Generator
Note: Press the radio power switch to on the radio. Signal generator output must be kept as low as possible
to avoid overload and clipping.
Step Generator
Coupling
Stereo
Separation
FM SNC
Adjustment
STOP
SENS.
Note: The tuner module is well-adjust and adjustment is not recommended.
Signal
Generator
to antenna
receptacle
98.1 MHz
Dev. 75 kHz
L+R=90 %
Int. 1 kHz
60dBµV output
Signal
Generator
To antenna
receptacle
Generator Display
98.1 MHz
Int. 1 kHz
Dev. 75 kHz
L+R = 90 %
pilot = 10 %
98.1 MHz
@ 40 dBµ
98.1 MHz
Mod. 1kHz
Dev 75kHz
98.1 MHz
98.1 MHz
98.1 MHz
Setting
Adjustment Remarks
VR1
VR2
VR3
Adjust AF
output power
at maximum
separating
more than 30 dB
Stereo Separation
25 dB (±5 dB)
Adjust AF to stop
station.
8
MAIN BOARD
PRINTED CIRCUIT BOARDS
TOP VIEW
9
MAIN BOARD
BOTTOM VIEW
10
KEY BOARD
TOP VIEW
11
KEY BOARD
BOTTOM VIEW
12
Loading...