Akai ACR-129MMU User manual

SERVICE MANUAL
Models:
ACR-129MMU
CD/MP3/USB/RDS–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............................................................................................................................................9
Exploded Views (Panel).......................................................................................................................................16
Exploded View Parts Lists (Panel) ......................................................................................................................17
Exploded Views (Cabinet) ...................................................................................................................................18
Exploded View Parts Lists (Cabinet)...................................................................................................................19
Exploded Views (Deck)........................................................................................................................................20
Exploded View Parts Lists (Deck) .......................................................................................................................21
Schematic Diagram .............................................................................................................................................23
Electrical Parts List ..............................................................................................................................................26
Specifications.......................................................................................................................................................33

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 Front Panel and the Ring.
Remove two screws (C) from on the front side of the Base.
5. Remove two screws (D) from on the right side of the Rear-right Cabinet.
Remove the screw (E) from on the left side of the Rear-right Cabinet and the screw (F) on the right side of
the heat sink.
6. Remove two screws (G) from under the deck front bracket then remove the Deck Front Bracket.
Remove two screws (H) from under the deck rear bracket then remove the Deck Rear Bracket and the Deck.
7. Remove two screws (I) from on the back of the Rear-right Cabinet then remove the IC Bracket (7805).
8. Remove two screws (J) from on the left side of the heat sink.
9. Remove two screws (K) from on the left side of the heat sink then remove the IC Bracket.
10. Remove two screws (L) from on the rear side of Rear-right Cabinet then remove the Power IC Bracket.
11. Remove the screw (M) from on the back of the side bracket then remove Wire Clip.
12. Remove two screws (N) from under the main board then remove two SD PCB Brackets and the SD Card
PCB Board.
13. Remove two screws (O) from each side of the base then remove the Base.
14. Remove three screws (P) from under the main board then remove the Heat Sink, Rear-right Cabinet 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
Ronlypilotlevel8%
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
MITSUMI BOARD

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
SD/MMC CARD 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
27
28
29
30
31
32
33
34
35
36
37
38
Lens(S.N0000/WHT)DX3.82.25N/SW/IR(AKAI
ACR-129MMU) ROHS
T. Panel (S. N0000/WHT) X3.18.9 ROHS
Panel Bottom ROHS
Decorate B (S. N0000) ROHS
Left Decorate A (S. N0000) ROHS
USB Decorate D (S. N0000/WHT) ROHS
USB Cover (Black) ROHS
Release (S. N0000) ROHS
“Open” Spring ROHS
SEL Base (S.N1204) ROHS
Decorate For Volume(Crystal/Blue) ROHS
SEL (L-UP)(S.N0000)ROHS
SEL Knob (Crystal/Blue) ROHS
STOPPER For SEL ROHS
EQ (L-Up) (S. N0000) ROHS
Adaptor For EQ ROHS
Power (Crystal/blue PMS291C)ROHS
Adaptor For PWR ROHS
AS/PS/2SCN/4SHF/6(L-UP)(S.N0000) ROHS
1PAU/3RPT/5(L0UP)(S.N0000) ROHS
MD (L-Up) (S. N0000) ROHS
MD Knob (Crystal/Blue) ROHS
TUN/TRK (L-Up) (S. N0000) ROHS
BND(Crystal/Blue PMS291C)ROHS
Adaptor For BND ROHS
EJ (L-Up) (S.N0000) ROHS
Decorated Ring (S. N0000) ROHS
LOC/MON/DSP/MUT(L-UP)(S.N0000)ROHS
4D Knob (Clear/Blue) ROHS
Adaptor For 4D ROHS
B-L For 4D ROHS
B-L For CD-Mouth ROHS
B-L For Main Key ROHS
Key Board
LCD Bracket Real (E) ROHS
CD3001 LCD TN NEG Color Black Mask 22X84 PIN ROHS
CD1007 B. Light /White ROHS
Screw Ø2X8 BA/ST Black ROHS
5300-0J2060-356
5100-0J2021-32W
5100-0C2522-00
5200-0J2039-30
5200-0J2038-30
5200-0J2040-31W
5200-0J2063-00
5200-0J2035-30
3600-040205-00
5200-0J2037-80
5200-0J2058-70
5200-0J2029-01
5200-0J2057-70
5200-0J2056-00
5200-0J2022-01
5200-0J2053-00
5200-0J2051-71B
5200-0J2033-00
5200-0J2025-02
5200-0J2026-02
5200-0J2030-01
5200-0J2052-70
5200-0J2024-01
5200-0J2051-72B
5200-0J2032-00
5200-0J2021-01
5200-0J2036-80
5200-0J2027-02
5200-0J2054-70
5200-0J2034-00
5200-0J2055-00
5200-0J2023-00
5200-0J2062-00
1121-300630-3108
3900-0E2004-00
2700-300200-110Y
0200-001007-09
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
Panel
Ring/ABS + SPY (S .N0000) ROHS
Base (E) (MMC+SD) ROHS
Rear-right Cabinet W/Spring For CD-wire ROHS
CD MECH. MG205 (205) ROHS
Left Cabinet-heat Sink W/Spring ROHS
Top Cabinet ROHS
Bottom Cabinet ROHS
Main Fiber ROHS
Main Board
Mounting Box ROHS
Shade ROHS
CD Windows Sheet ROHS
Lock Panel Knob ROHS
Spring For EJ Panel CD300 ROHS
Hook Knob ROHS
Spring For Hook Knob CD300 ROHS
Deck Front Bracket (Detachable) ROHS
Deck Rear Bracket for CD ROHS
FM Cover ROHS
M.FAE347/P21/P22 East Furepe 1 Pack 65-108MHJ ROHS
SD+MMC CARD Board
PCB Bracket (GOODMANS) ROHS
SD PCB Bracket ROHS
IC Bracket (7805) ROHS
Power IC Bracket ROHS
IC Bracket For Regulator ROHS
Wire Clip 1.0MM ROHS
Screw Ø5X18 HH ROHS
Spring Washer M5 ROHS
Hexagon Nut M5 ROHS
Screw Ø2.6 X 4 BH/MS ROHS
Screw Ø2.6 X 5 BH/TAPTITE ROHS
Screw Ø2.6 X 6 BH/MS ROHS
Screw Ø2.6 X 6 BH/MS Black ROHS
Screw Ø2.6 X 8 BH/MS ROHS
Screw Ø2.6 X 10 BH/MS ROHS
Screw M2.6 X 20 PH/MS ROHS
5100-0E2022-30
5100-0E2028-00
6100-300002-002
9400-002050-01
6100-300004-003
6100-300001-000
6100-300002-000
3500-300001-000
1111-500040-020C
6100-300005-000
8100-069005-03
4300-0A3103-00
5200-0E2041-00
3600-0E2001-00
5200-0E2040-01
3600-0E2002-00
3900-300001-000
3900-300002-000
3900-0W2001-00
2900-000347-03
1111-300010-3408
3900-0B0110-00
3900-0E2013-00
3900-0C1817-00
3900-300006-000
3900-300007-000
3900-0B1415-00
4000-005018-04
3500-050001-00
3500-040005-00
4000-002604-01
4000-002605-03
4000-002606-01
4000-012606-01
4000-002608-01
4000-002606-00
4000-002620-00

20
EXPLODED VIEW (DECK)