Akai ACR-26MPU User manual

P L L S Y NT HE S IZE R S T E R E O R A DIO WIT H
C OMP A C T DIS C P L A Y E R DIG IT A L
4 SHF 3 RPT 2 SC N 1 PAU
BND
MO D
LO U/ENT
RELEASE
PO WER
EJEC T
A
MS
9
8
7
SW
PUSH
SEL
5 6
REC
0
MUT LO C MO N
C AR C D/MP3/WMA PLAYER
D-AUD
D
S
P
E
Q
DIR
MODEL: ACR-26MPU

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) ...................................................................................................................................... 15
Exploded View Parts Lists (Panel) ...................................................................................................................... 16
Exploded Views (Cabinet) ................................................................................................................................... 17
Exploded View Parts Lists (Cabinet) ................................................................................................................... 18
Exploded Views (Deck) ....................................................................................................................................... 19
Exploded View Parts Lists (Deck) ....................................................................................................................... 20
Schematic Diagram ............................................................................................................................................. 22
Electrical Parts List .............................................................................................................................................. 25
Specifications....................................................................................................................................................... 31

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 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 the screw (H) from on the right side of the side bracket then remove the IC Bracket.
8. Remove two screws (I) from on the left side of the heat sink then remove the Spring Sheet.
9. Remove five screws (J) from on the left side of the heat sink then remove the Heat Sink.
10. Remove the screw (K) from on the back of the side bracket and remove two screws (L) from on the main
board then remove the Heat Sink (7809/DB435).
11. Remove two screws (M) from on the back of the side bracket then remove Wire Clip.
12. Remove two screws (N) from each side of the base then remove the Base.
13. Remove three screws (O) 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
LW
FM
MW
LW
MW
FM Stereo
98.1 MHz (65, 108 MHz)
1000 kHz (522, 1620 kHz)
200 kHz (144, 288 kHz)
1 mV
5 mV
5 mV
400 Hz 30% MOD.
1 kHz 75kHz DEV.
46% for L only or
Ronlypilotlevel8%
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.
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 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
EXPLODED VIEW
PANEL

16
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
Lens; (S. OPC0000) DX3.59.16
T. Panel (S. OPC2001) W/D
Panel Bottom
Release Key (S. OP2001)
RE Knob Spring
Power Key (L-Up) (S. OP2001)
PWR Knob Adaptor
Encode Knob (Electron Plate)
Rubber Finish Key (S. OP0000)
Decorate Ring (Electron Plate)
Eject R Key (L-Up) (S. OP2001)
EJ Knob Adaptor
BND Key (L-Up) (S. OP2001)
BND Knob Adaptor
USB Cover (Black)
USB/Eject/LOU/ENT (S. OP2001)
PWR Back Light
CD B.L
MUT/LOC/MON Key (L-Up) (S. OPC0000)
MUT Knob Back Light
1PAU/3RPT/5 Key (L-Up) (S. OP0000)
2SCN/4SHF/6 Key (L-Up) (S. OP0000)
PAU Knob Back Light
8 TUNE SKIP Key (L-Up) (S. OP0000)
9TUNE SKIP/DISP/EQ Key (L-Up) (S. OP0000)
EQ Knob Back Light
MOD Key (Crystal/Blue PMS285C)
AMS Key (Crystal/Blue PMS285C)
MOD Knob Adaptor
MOD Knob Back Light
Key Board
CD115 Rotary Encoder VOL
LCD Bracket Real (E)
CD100USB LCD TN COLOR BLACK MASK PIN84X22
CD1007 B. Light /White
Screw Ø2X8 BA/ST Black
53-C2520-328
51-C2521-31Y
51-C2522-00
52-C2535-31Y
36-11852-00
52-C2522-31
52-C2548-00
52-C2534-90E
52-C2543-30
52-C2531-90E
52-C2520-31
52-C2546-00
52-C2521-31
52-C2547-00
52-J2063-00
52-C2532-31Y
52-C2544-00
52-C2545-00
52-C2525-02
52-C2539-00
52-C2526-02
52-C2527-02
52-C2540-00
52-C2528-01
52-C2529-01
52-C2542-00
52-C2536-71B
52-C2537-71B
52-C2530-00
52-C2541-00
11-20050-318
18-00115-00
39-E2004-00
27-10001-01
02-01007-09
40-12008-21

17
EXPLODED VIEW
CABINET

18
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
Panel
Ring /ABS (S. OP20001)
Base Real (E) /777
Side Bracket (CD200 Wire)
CD MECH. CDM-1684EUK W/O 146A NO BP
Heat Sink (For Wire)
Top Cabinet
Bottom Cabinet (For Wire)
Main Fiber
Main Board
Mounting Box (072)
Shade
CD Windows Sheet
Lock Panel Knob
Spring For EJ Panel CD200
Hook Knob
Spring For Hook Knob CD200
Deck Front Bracket (CDN200)
Deck Rear Bracket
FM Cover
M. FAE347/P21/P22 East Europe 1 Pack 65-108MHz
IC Bracket (7805)
Spring Sheet
Heat Sink (7809/DB435)
Wire Clip 1.0MM
Screw Ø5X18 HH
Spring Washer M5
Hexagon Nut M5
Screw Ø2.6 X 4 BH/MS
Screw Ø2.6 X 5 BH/TAPTITE
Screw Ø2.6 X 6 BH/MS
Screw Ø2.6 X 6 BH/MS Black
Screw Ø2.6 X 8 BH/MS
Screw Ø2.6 X 10 BH/MS
Screw M2.6 X 20 PH/MS
51-E2022-30Y
51-E2020-00
61-N0201-00
94-01684-12
61-N0204-00
61-B0105-01
61-B0114-01
35-B0101-00
11-20050-089
61-07211-03
81-69005-02
43-A3103-00
52-E2041-00
36-E2001-00
52-E2040-01
36-E2002-00
39-N0201-00
39-B0101-01
39-D0507-00
29-00347-03
39-B0115-00
39-E2003-00
39-B0118-00
39-B1415-00
40-05018-04
35-50001-00
35-40005-00
40-02604-01
40-02605-03
40-02606-01
40-12606-01
40-02608-01
40-02610-01
40-02620-00

19
EXPLODED VIEW (DECK)

20
EXPLODED VIEW PARTS LIST (DECK)
Ref. No. Description Parts No. Q’ty
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
SENSOR
SENSOR PCB
SCREW
COVER-UPPER
LEVER DISC
GUIDE UP
BUSHING ROLLER
ROLLER DISC
SHAFT ROLLER
PIN ROLLER
PVC CAP
B/K ROLLER
PIN PULLEY
PIN IDLE
GEAR IDLE
GEAR PULLEY
BELT PULLEY
GEAR ROLLEY
LOCKER (L)
CAM (L)
S/P CAM (L)
S/P RACK
CAM (R)
LOCKER ®
GEAR RACK
GEAR LOAD ©
GEAR LOAD (D)
GEAR LOAD (B)
GEAR LOAD (A)
PIN LOAD
B/K GEAR
MOTOR
GEAR WORM
SERVO PCB ASSY
SPECIAL SCREW
S/P RO (L)
SUPPORT DAMPER
S/P RO ®
CHASSIS MAIN
ST-23G
FR
CA/H 0” TT 2*3
SECC T1.0
POM (F20-03)
POM (F20-03)
POM (F20-03)
SLICON
SUS 303
SUM24L-NI (PLATE)
PVC
SECC T1.0
SUM24L-NI (PLATE)
SUM24L-NI (PLATE)
POM (F20-03)
POM (F20-03)
CR-WRT
POM (F20-03)
POM (F20-03)
POM (F20-03)
SUS304WPB
SUS304WPB
POM (F20-03)
POM (F20-03)
POM (F20-03)
POM (F20-03)
POM (F20-03)
POM (F20-03)
POM (F20-03)
SUM24L-NI (PLATE)
SECC T1.0
FF-050SH-11190
POM (F20-03)
GLASS EPOXY 1.2T
P/H TTS 2*2
SUS304WPB
POM (F20-03)
SUS304WPB
SEEC T1.0
2
1
12
1
1
1
2
2
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
1
1
1
1
4
1
3
1
1