Akai ACR-141 MP User manual

SERVICE MANUAL
Model:
ACR-141 MP
CD/MP3–RECIVER
www.akai.ru

2
CONTENTS
Page
Disassembly Instructions........................................................................................................................................ 3
Disassembly Diagram............................................................................................................................................. 4
Operation Check..................................................................................................................................................... 5
Block Diagram ........................................................................................................................................................ 6
Alignment Locations ............................................................................................................................................... 7
Alignment Procedures ............................................................................................................................................ 8
Printed Circuit Boards........................................................................................................................................... 10
Exploded Views (Panel)........................................................................................................................................ 16
Exploded View Parts Lists (Panel)........................................................................................................................ 17
Exploded Views (Cabinet) .................................................................................................................................... 18
Exploded View Parts Lists (Cabinet) .................................................................................................................... 19
Exploded Views (Deck)......................................................................................................................................... 21
Exploded View Parts Lists (Deck)......................................................................................................................... 22
Schematic Diagram .............................................................................................................................................. 24
Electrical Parts List............................................................................................................................................... 27
Specifications........................................................................................................................................................ 34

3
DISASSEMBLY INSTRUCTIONS
1. Using the unlock key that came with the unit or a similar tool, unlock the Mounting Box and remove
toward the rear of the unit.
2. Remove two screws (A) located on the rear of the top cabinet then remove the Top Cabinet.
3. Remove two screws (B) located on the rear of the bottom cabinet then remove the Bottom Cabinet.
4. Take out the Panel; The Ring and the Panel Bracket.
Remove two screws (C) from each side of the base then remove the Base.
5. Remove two screws (D) from on the right side of the side bracket.
Remove two screws (E) from on the left side of the side bracket.
6. Remove two screws (F) from under the deck front bracket then remove the Deck Front Bracket.
Remove two screws (G) from under the deck rear bracket then remove the Deck Rear Bracket and the
Deck.
7. Remove two screws (H) from on the left side of the heat sink then remove the Spring Sheet.
8. Remove five screws (I) from on the left side of the heat sink then remove the Heat Sink.
9. Remove the screw (J) from on the back of the side bracket and remove two screws (K) from on the main
board then remove the Heat Sink (7809/DB435).
10. Remove the screw (L) from on the back of the side bracket then remove Wire Clip.
11. Remove three screws (M) from under the main board then remove the Side Bracket and the Main Board.

4
DISASSEMBLY DIAGRAM

5
OPERATION CHECK
GENERAL SPECIFICATIONS OF SIGNAL
Standard frequency
Signal output
Modulation
FM
MW
FM
MW
MW
FM Stereo
98.1 MHz (65.0, 74.0MHz) (87.5, 107.9 MHz)
1000 kHz (530, 1710 kHz)
1mV
5 mV
400 Hz 30% MOD.
1 kHz 75kHz DEV.
46% for L only or
R only pilot level 8%
AF output level FM/MW
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.
TestDiagram
4-SPEAKER
VTVM
DISTORTION
METER
2-SPEAKER
FRONT
SPK.
SPK.
FL.
RL.
SPR.
MAIN UNIT
AM SG
VTVM ANTANNA
DUMMY
FM SG
MODULATOR
STEREOS
MPX
ANT
FRONT
SPK.
SPE.
FR.
RR.
4-SPEAKER
SPK.
2-SPEAKER
POWER ANTANNA
ACC (DV14.4V)
GROUND
BACK UP (14.4V)

6
BLOCK DIAGRAM

7
ALIGNMENT LOCATIONS
FM/MW/LW TUNER

8
ALIGNMENT PROCEDURES
FM ADJUSTMENT
Equipment Required
zAM IF/RF signal generator
zSolid-state voltmeter (SSVM)
zRegulated DC power supply
z2-CH voltmeter
zDistortion 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 Generator Display Setting Adjustment Remarks
Stereo
Separation Signal Generator
to antenna
receptacle
98.1 MHz
Int. 1 kHz
Dev. 75 kHz
L+R = 90 %
pilot = 10 %
98.1 MHz VR1 Adjust AF output power
at maximum
separating
more than 30 dB
FM SNC
Adjustment 98.1 MHz Dev. 75 kHz
L+R=90 %
Int. 1 kHz
60dBµV output
98.1 MHz
@ 40 dBµ
98.1 MHz VR2 Stereo Separation
25 dB (±5 dB)
Stop
SENS. Signal Generator to antenna
receptacle
98.1 MHz
Mod. 1kHz
Dev 75kHz
98.1 MHz VR3 Adjust AF to stop station.
Note: The tuner module is well-adjust and adjustment is not recommended.

9
PRINTED CIRCUIT BOARDS
MAIN BOARD
TOP VIEW

10
MAIN BOARD
BOTTOM VIEW

11
KEY BOARD
TOP VIEW

12
KEY BOARD
BOTTOM VIEW

13
CD SERVO BOARD
TOP VIEW

14
CD SERVO BOARD
BOTTOM VIEW

15
LAMP BOARD

16
EXPLODED VIEW
PANEL

17
EXPLODED VIEW PARTS LIST
PANEL
Ref. No. Description RS Part No. Mfr’s Part No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Lens: CD-F1628X3.82.25/WMA N/SW(S.PY BLK/WHT)
ROHS
T. Panel X3.17.9-F N/RM(S.N1202/B) W/O BRAND ROHS
Bottom Cabinet ROHS
Open Knob For FD (S. N1202/Black) ROHS
Open Knob Spring ROHS
Volume Knob Cover (S. N1202) ROHS
Volume Knob Backlight ROHS
Soft PVC Sheet 0.10MM ROHS
IR Lens (S. N1202) ROHS
Number 1/PAU-3/BND Knob (L-Up) (S.N1202) ROHS
Number 4/SHF-6 Knob (L-Up) (S.N1202) ROHS
7MOD/AS-PS Knob (L-Up) (S. N1202) ROHS
EQ/DISP-0/PWR Knob (L-Up) (S. N1202) ROHS
Reset Knob (S. N1202) ROHS
SCN Knob (S.N1202/Black) ROHS
TRK/8-9 Knob Cover (S. N1202/Black) ROHS
Enter Key Back Light +SPY White ROHS
Key Board
CD115 Rotary Encoder VOL ROHS
LCD Cover 90.4MM/BLK ROHS
CD173 LCD TN NEG COLOR PIN TYPE ROHS
LCD Felt Sheet ROHS
LED B.L White 109X20.5 ROHS
Eject Knob-F (L-Up) (S. N0000) ROHS
VOL Knob (S.N0000) ROHS
Screw Ø2X8 BA/ST Black ROHS
5300-0G6230-39W
5100-0G6220-891
5100-0G6221-00
5200-0G6224-81B
3600-000101-00
5200-0G6223-80
5200-0G6232-00
4300-0H6202-00
5200-0G6231-80
5200-0G6227-82
5200-0G6230-82
5200-0G6226-83
5200-0G6225-82
5200-0G6234-80
5200-0G6229-82B
5200-0G6228-82B
5200-0G6233-01
1121-510030-3008
1800-000115-00
3900-0H6201-00
2700-510000-110Y
4400-0A7301-01
0200-001730-09
5200-0G6239-01
5200-0G6222-30
4000-012008-21

18
EXPLODED VIEW
CABINET

19
EXPLODED VIEW PARTS LIST
CABINET
Ref. No. Description RS Part No. Mfr’s Part No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Panel
Ring (S.N1202) ROHS
Base ROHS
U Bracket (CD200/Wire) ROHS
CD MECH. MG205 (205) ROHS
Heat Sink (For Wire) ROHS
Top Cabinet ROHS
Bottom Cabinet (For Wire) ROHS
Main Fiber ROHS
Main Board
Mounting Box (072) ROHS
Shade ROHS
CD Windows Sheet ROHS
Panel Bracket (18PIN) ROHS
Pipe ROHS
Bracket Spring ROHS
Gear 1 (POM) ROHS
Panel Bracket Spring (Left) Electroplate ROHS
Panel Bracket Spring (Right) Electroplate ROHS
GIB (POM) ROHS
Open Adaptor ROHS
Right Bracket ROHS
Gear 2 (POM) ROHS
Left Bracket (CD-049) ROHS
CD Back Light (PC) ROHS
Hook (POM) ROHS
Release Spring ROHS
Hook Shaft ROHS
Lamp Board
Right Spring (Mark 1) ROHS
Spring Bracket ROHS
18PIN SKT With Flexible PCB (DVDD1628) ROHS
Socked Bracket (18PIN) ROHS
Deck Front Bracket (CDN217) ROHS
Deck Rear Bracket ROHS
Spring Sheet ROHS
M.FAE347/P21/P22 East Furepe 1 Pack 65-108MHJ ROHS
FM Cover ROHS
Heat Sink (7809/DB435) (0.017KG) ROHS
Wire Clip 1.0MM (0.013KG) ROHS
5100-016228-80S
5100-0H6225-00
6100-0N0201-00
9400-002050-01
6100-0N0204-00
6100-0B0105-01
6100-0B0114-01
3500-0B0101-00
1111-500040-020C
6100-007211-03
8100-069005-03
4300-0A3103-00
6100-0H6201-00
3400-040201-00
3600-002922-03
5200-040237-00
3600-004901-02
3600-004902-02
5200-040235-00
5200-010564-00
3900-000104-00
5200-040238-00
3900-004908-00
5200-004937-00
5200-040236-00
3600-000102-00
3400-000101-00
1111-510020-3500
3600-068301-00
5200-016255-00
2500-0F1628-18A
5200-0A1235-00
3900-0N2101-00
3900-0B0101-00
3900-0E2003-00
2900-000347-03
3900-0W2001-00
3900-0B0118-00
3900-0B1415-00

20
Ref. No. Description RS Part No. Mfr’s Part No.
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Screw Ø5 X 18 HH ROHS
Spring Washer M5 ROHS
Hexagon Nut M5 ROHS
Damper Gear-Assy ROHS
Wire Fix Fiber (18PIN) ROHS
Wire Fix Sheet 18PIN (0.004KG) ROHS
SCREW Ø2X4 PA/ST ROHS
SCREW Ø2.6X4 PH/TAPTITE ROHS
SCREW Ø2.6X5 BH/TAPTITE ROHS
SCREW Ø2.6X6 BH/MS ROHS
SCREW Ø2.6X8 BH/MS ROHS
SCREW Ø2.6X10 BH/MS ROHS
SCREW M2.6X20 PH/MS ROHS
SCREW Ø2X4 BH/ST ROHS
SCREW Ø2X6 PA/ST (Black) ROHS
CAMERA SCREW M2X3 P/H (Black) ROHS
SCREW Ø2.6X3 BH/MS ROHS
SCREW Ø2.6X4 BH/MS ROHS
4000-005018-04
3500-050001-00
3900-040005-00
9300-040201-00
3500-008303-00
3900-008303-00
4000-002004-10
4000-002604-03
4000-002605-03
4000-002606-01
4000-002608-01
4000-002610-01
4000-002620-00
4000-012004-00
4000-012006-20
4000-060203-20
4000-002603-01
4000-002604-01