ACR-127MMC (SM)
ACR-127MMC (SM)
Model:
ACR127MMC
SERVICE MANUAL
www.akai.ru
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) ...................................................................................................................................... 18
Exploded View Parts Lists (Panel) ...................................................................................................................... 19
Exploded Views (Cabinet) ................................................................................................................................... 20
Exploded View Parts Lists (Cabinet) ................................................................................................................... 21
Exploded Views (Deck) ....................................................................................................................................... 23
Exploded View Parts Lists (Deck) ....................................................................................................................... 24
Schematic Diagram ............................................................................................................................................. 26
Electrical Parts List .............................................................................................................................................. 29
Specifications....................................................................................................................................................... 36
2
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.
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 three 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).
10. Remove two screws (M) from on the back of the side bracket then remove Wire Clip.
11. Remove two screws (N) from each side of the base then remove the Base.
12. Remove three screws (O) from under the main board then remove the Side Bracket and the Main Board.
13. Remove two screws (P) from under the main board then remove the two SD PCB Bracket an the SD PCB
Board.
3
DISASSEMBLY DIAGRAM
4
OPERATION CHECK
POWER ANTANNA
MAIN UNIT
ANT
MPX
DUMMY STEREOS
DISTORTION ANTANNA MODULATOR
METER VTVM VTVM
AM SG FM SG
5
BLOCK DIAGRAM
6
ALIGNMENT LOCATIONS
FM TUNER BOARD
7
ALIGNMENT PROCEDURES
FM ADJUSTMENT
Equipment Required
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.
8
PRINTED CIRCUIT BOARDS
MAIN BOARD
TOP VIEW
9
MAIN BOARD
BOTTOM VIEW
10
KEY BOARD
TOP VIEW
11
KEY BOARD
BOTTOM VIEW
12
CD SERVO BOARD
TOP VIEW
13
CD SERVO BOARD
BOTTOM VIEW
14
FRONT/EJ BOARD
TOP VIEW
15
FRONT/EJ BOARD
BOTTOM VIEW
16
SD CARD PCB BOARD
17
EXPLODED VIEW
PANEL
18
EXPLODED VIEW PARTS LIST
PANEL
Ref. No. Description RS Part No. Mfr’s Part No.
1 Lens; (OPC0000) LCD X59.16 N/IR/SW 53-J2122-333
2 Panel –F (OP2001/White) LCD X60.16 “USB” 51-J2121-31A
3 Panel Bottom (F) 51-J2137-00
4 VOL Knob (E. Silver) 52-J2130-90E
5 Round Decoration (E-Silver) 52-J2131-90E
6 Open Key (L-Up) (OP0000) 52-J2147-30
7 RE Knob Spring 36-11852-00
8 Power Knob (L-Up) (OPC0000) 52-J2135-01
9 RE Slide Spring 36-11851-00
10 Decoration 01 (OPC0000) 52-J2133-30
11 Decoration 02 (OPC0000) 52-J2136-30
12 Decoration With USB (S. OPC0000) 52-J2141-31W
13 USB Cover (Black) 52-J2063-00
14 SET Knob (OPC0000) 52-J2134-30
15 MUT/LOC/MON Key (L-Up) (OPC0000) 52-J2124-32A
16 1PAU/3RPT/5 Key (L-Up) (OPC0000) 52-J2125-01
17 2SCN/4SHF/6 Key (L-Up) (OPC0000) 52-J2126-01
18 MD Key (Crystal/Purple PMS2572C) 52-C2536-51P
19 Adaptor 01 52-J2138-00
20 BND/EQ Key (L-Up) (OPC0000) 52-J2129-03
21 0 DSP Key (L-Up) (OPC0000) 52-J2128-01
22 8TUNE SKIP/9TUNE SKIP Key (L-Up) (OPC0000) 52-J2127-01
23 AMS Key (Crystal/Purple PMS2572C) 2175 52-C2537-52P
24 Adaptor 02 52-J2140-00
25 B-Light 01 52-J2142-00
26 B-Light 02 52-J2143-00
27 B-Light 03 52-J2145-00
28 Key Board 11-21750-318
29 CD115 ROTATE ENCODER VOL 18-00115-00
30 LCD Cover 39-E2104-01
31 CD-158 TN NGE M. Color PIN TYPE 27-01580-01Y
32 LED B.L. QB02002-09 23.5X99 WHT 02-A1560-09
33 Axis Post 34-24601-00
34 Right Side Block 52-E2128-00
35 Contact Spring 36-78008-00
36 Left Side Block 52-E2129-00
37 E-Ring Ø1.5X4X0.4 MM 35-00001-00
38 Screw Ø1.7X4 PH/ST 40-11704-00
39 Screw Ø2X8 BA/ST Black 40-12008-21
19
EXPLODED VIEW
CABINET
20
EXPLODED VIEW PARTS LIST
CABINET
Ref. No. Description RS Part No. Mfr’s Part No.
1 Panel
2 Ring (S. OP2001) 51-G2121-30G
3 Base (F) (MMS+SD) 51-E2126-00
4 Side Bracket (CD200/Wire) 61-E2005-04
5 CD MECH. CDM-1684EUK W/O 146A NO BP 94-01684-12
6 Heat Sink (For Wire) 61-E2006-00
7 Top Cabinet 61-B0105-01
8 Bottom Cabinet (For Wire) 61-B0114-01
9 Main Fiber 35-B0101-00
10 Main Board 11-20050-089
11 Mounting Box (072) 61-07211-03
12 Shade 81-69005-02
13 CD Windows Sheet 43-A3103-00
14 Hook Shaft 34-D2101-00
15 Hook Spring 36-E2101-00
16 Hook 52-E2127-00
17 Push Out Spring 36-E2102-00
18 Panel Pole 52-E2126-00
19 Back Light “F” (White) 52-J2150-00W
20 Front Board 11-21761-348
21 20PIN Socket 25-F0217-20A
22 Eject Knob (S. OPC0000) (L-Up) 52-J2149-01
23 Eject Board 11-21761-348
24 Right Bracket 39-E2101-01
25 Damper Gear Ass’y /19-24 T/Q 93-12246-01
26 Middle Gear (F) 52-E2130-00
27 Left Bracket 39-E2102-01
28 Deck Front Bracket 39-E2105-00
29 Deck Rear Bracket 39-B0101-00
30 MITSUMI TUNER FAE391-A01 29-00391-01
31 FM Cover 39-D0507-00
32 IC Bracket (7805) 39-B0115-00
33 SD PCB Board 11-20081-348
34 PCB Bracket (GOODMANS) 39-B0110-00
35 SD PCB Bracket 39-E2013-00
36 Spring Sheet 39-B0102-00
37 Heat Sink (7809/DB435) 39-B0118-00
38 Wire Clip 1.0MM 39-B1415-00
39 Screw Ø5X18 HH 40-05018-04
40 Spring Washer M5 35-50001-00
21
Ref. No. Description RS Part No. Mfr’s Part No.
41 Hexagon Nut M5 35-40005-00
42 Screw Ø2X3 CH/MA Black 40-12003-09H
43 Screw Ø2X4 BH/MS Black 40-12004-21
44 Screw Ø2X6 PA/ST Black 40-12006-20
45 Screw Ø2.6X4 BH/MS 40-02604-01
46 Screw Ø2.6X5 BH/TAPTITE 40-02605-03
47 Screw Ø2.6X6 PH/MS 40-02606-00
48 Screw Ø2.6X6 BH/MS 40-02606-01
49 Screw Ø2.6X6 PH/MS Black 40-02606-20
50 Screw Ø2.6X8 BH/MS 40-02608-01
51 Screw Ø2.6X10 BH/MS 40-02610-01
52 Screw M2.6X20 PH/MS 40-02620-00
22
EXPLODED VIEW (DECK)
23
EXPLODED VIEW PARTS LIST (DECK)
24
EXPLODED VIEW PARTS LIST - CONTINUED (DECK)
25
SCHEMATIC DIAGRAM (MAIN BOARD)
26
SCHEMATIC DIAGRAM (KEY BOARD)
27
760_VDD 760_CORE
760_VDD
8V 3V
SVCC
SVCC
SVCC
SVCC
10K
47P NPO
20P NPO
R12
2P NPO
3P NPO
R11
C22
C23
R10
112
119
109
120
110
5K1 C26 103 NPO U1
64
76
33
16
89
87
41
24
77
71
81
97
65
45
32
88
55
25
86
85
80
79
7
8
1K2
1K2
C25
C30
VDDIO_0
VDDIO_1
VDDIO_2
VDDIO_3
PKG1
VDD_COR_0
VDD_COR_1
VDD_COR_2
VDD_COR_3
VDD_COR_4
VDD_COR_5
VDDA_PLL
VSS3D_0
VSS3D_1
VSS3D_2
VSS3D_3
VSS3D_4
VSS2D_0
VSS2D_1
VSS2D_2
VSS2D_3
VSS2D_4
VSS2D_5
VSS_ADC_0
VSS_ADC_1
VSS_PLL_0
VSS_PLL_1
VDD3_USB
VDD_OSC
VDDA_ADC
8V SVCC 3V VCC 3V
10K
10K
SVCC
R28 47K
R21
R22
R24
R25
TEST0
TEST1
TEST2
TEST3
TEST4
EFM
RF2-
RF-
RFI
ADVDD
ASY
ADGND
TESTEN
DGND
MD-
SD-
TD-
FD-
DVDD
MD+
SD+
TD+
FD+
nCS[0]/ND_nOE[0]/GPIO_B[2]
nCS[1]/ND_nOE[1]/GPIO_B[3]
nCS[2]/ND_nOE[2]/GPIO_B[4]
nCS[3]/ND_nOE[3]/GPIO_B[5]
16 SVCC 97 29 10 EXTERNAL 90
FO+ TE2 C2D1/RMUTE XD[10] GPIO_D15 CDP_nSTB
GND 17 98 TEC CID2/TZD 28 11 XD[11]
INTERRUPT
GPIO_D16 91 CDP_A0
18 EC6 10uF C44 103 C43 104 99 27 BD2 OPEN 12 92
GND AGND CID1/FZD XD[12] GPIO_D17 LOAD_START
100 26 13 93
EXINT[0]/GPIO_A[12]
EXINT[1]/GPIO_A[13]
EXINT[2]/GPIO_A[14]
EXINT[3]/GPIO_A[15]
SVCC PWMSW DVDD VCC XD[13] GPIO_D18 RFOK 760_VDD
ND_nWE/GPIO_B[7]
SD_CKE/GPIO_B[0]
R37 33K AD
SD_nCS/GPIO_B[1]
14 XD[14] GPIO_D19 94 LDEND_CHK
CLOCK
READY/MODE[0]
CON_16P_FUP 15 XD[15]
CONVERTER
GPIO_D20 95 FEEDR
96 R38 OPEN
JTAG GPIO_D21 FEEDF
R39 10R C45
104
DAGND
DAGND
DAVDD
DAVDD
SCLK_BM0
XTAL1
XTAL2
MODE[1]
DGND
REGC
XGND
DVCC
ROUT
nRESET
AVDD
RFOK
XVDD
SD_CLK
LOUT
SYSTEM
ADIN[0]
ADIN[2]
ADIN[4]
INTQ
XTOUT
nTRST
SCK
RST
STB
XOUT
XFILT
Q2 A812 R40 33K
PD
PN
SD
LD
A0
XTIN
CONFIG
nWE
TDO
TMS
SI
TCK
nOE
XIN
99 TDI
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1
2
3
4
5
6
7
8
9
100
101
102
103
121
122
123
124
74
75
78
69
70
47
48
49
50
57
58
59
56
44
46
82
83
84
72
73
98
760_VDD
XVCC VCC AVCC
R41 OPEN
760_VDD R45 47K
R42 3R0 R43 3R0
SVCC LRCK_BM1
C46 C47 C48 C49 C92 R44 33K
SVCC
XVCC
AVCC
AVCC
VCC
760_VDD
104 104 104 104 104
R46 4K7
EC8
C52
C50 EC7
CDP_nRST
CDP_nSTB
CDP_INTQ
103
10uF
nOE
nWE
TDO
NOR_nCE
SLED_ORG
SD_CKE
nRESET
TMS
nTRST
USB_DETECT
CD_CE
TDI
CDP_nRST
CDP_INTQ
TCK
EJEND
MMC_CD
DECK_OPTION
CD_LOCK
SD_CLK
SD_nCS
R50 R51 5R1 760_VDD 104
CDP_nRST
R48 1M
DSP_DOUT_BM2
7K5 7K5 C54
X1 R52 33K
13
U3
3
104 16.9344MHz
C55 C56
VL
VA
VD
R53
C58 101P NPO
33P NPO
33P NPO
R54
C59
R55
C61
15 33K
EC9 FILT+ R56
RST 9 nRESET
VREF C62 33K
760_VDD
OPEN
OPEN
1uF 104 14 1
REF_GND M0
22K
15K
R57
8V 16 6M2
M1
11 VQ R59
R64 R60 R61 OPEN
R63 EC10 C63 OPEN OPEN Y1
C64
360pF
28
2 C66 C67 R66
MCLK ENC_MCLK
22P NPO 22P NPO 100K
R67 R68 8
LRCK LRCK_BM1
1K 1K 5 GND 760_VDD 760_VDD
32
31
30
29
28
27
26
25
34
24
23
22
21
20
19
18
17
SCLK 7 SCLK_BM0
OPOUT4
OPOUT3
GND1
REV
OPIN4-
OPIN3-
PGND
REGO
OPIN4+
OPIN3+
REB
MUTE
BIAS
VO3-
VO4-
VO3+
VO4+
R71
R72
R73
R74
100K 100K
IP9004 152 152
R75 R76
1K 1K
OPOUT1
OPOUT2
1K
1K
1K
1K
R77
OPIN1+
OPIN2+
OPIN1-
OPIN2-
PGND
760_VDD
VOL+
VO2+
VO1+
CON1 47K
VCCI
VOL-
VO2-
VO1-
FWD
MSC
GND
10
11
12
13
14
15
16
DATA DO D0 DO CD
OPEN OPEN OPEN
1
2
3
4
5
6
7
8
R87
C75
ZD2
ZD3
ZD4
ZD5
CON_2P 39K R93 10 BD3 10 3 D+
10K
0R
0R
R94 10 2 MMC_SOCKET
R95 BD4 10 D-
J3
6.2V
6.2V
6.2V
6.2V
100K 1
USB_5V VCC
ZD6
ZD7
1 8V
1 R97 R98 USB_HOST A_TYPE
2 2
R101
6.2V
6.2V
C76
C77
C78
C79
4 4
CON_4P R111 120R
760_VDD
101 NPO
102 NPO
101 NPO
102 NPO
10K
20K
SENS_IN
2 2
R102 R103 USB_5V 25 37
7K5 7K5 A0 VDD U6
LDEND_CHK TXD 24 A1
CON_2P 23 A2
SENS_O
22 A3 DQ0 29 21 A0 DQ0 2
760_VDD 8V
21 A4 DQ1 31 22 A1 DQ1 3
Q4 20 33 23 5
SW1 R108 47K KRC104S A5 DQ2 A2 DQ2
19 A6 DQ3 35 24 A3 DQ3 6
760_VDD 18 38 27 8
A7 DQ4 760_VDD A4 DQ4
8 A8 DQ5 40 28 A5 DQ5 9
SW1AB-270 7 42 29 11
R106 A9 DQ6 A6 DQ6
FEEDF 6 A10 DQ7 44 30 A7 DQ7 12
U7
10
11
12
13
14
15
10M 5 A11 DQ8 30 31 A8 DQ8 39
9
C80 224 4 32 C81 C82 32 40
J6 FEEDR A12 DQ9 A9 DQ9
7 3 34 20 42
SENS1O
AGND
R_CHO_ADC
L_CH_OUT
R_CH_OUT
USB_5V
M_RXD
M_TXD
MAIN_8V
GND
SENS1IN
nRESET
M_CE
L_CHO_ADC
ENC_GND
R109 OPEN R104 Td A13 DQ10 104 104 A10 DQ10
1 1K TXD_R 2 36 19 43
1 A14 DQ11 A11/BA0 DQ11
2 2 CDP_ADSW 8 PGND1 VO2 6 760_VDD 1 A15 DQ12 39 DQ12 45
3 D1 1N4148 48 41 36 46
3 C24 A16 DQ13 UDQM DQ13
VO1 5 760_CORE 17 A17 DQ14 43 14 LDQM DQ14 48
EC16
CON_3P EJEND 16 NC/A18(800) DQ15 45 DQ15 49
102 4 EC15 C83 R110 0R 760_VDD 34
RST SD_CKE CKE
10uF C84 35 16
SD_CLK CLK CAS
J5 CON_15P_MAIN 3 104 26 47 17
SENS_O NC NOR_nCE /CE /BYTE RAS
10uF
9 104 11
PGND2 nWE /WE
R112 220K 2 28 15 33
NC nOE /OE nWE WE NC1
LOAD_START /RESET 12 nRESET SD_nCS 18 CS NC2 37
CD_CE VIN 1 USB_5V 27 VSS1 RY/BY 15
R120 10K 46 R113 0 760_VDD 1 26
VSS2 760_VDD VDD VSS
25 VDD VSS 50
R96 R114 R121 EC17 C85 9 13 7 4
18K IP1642L 10uF NC1 NC3 VDDQ VSSQ
OPEN 470K 10 NC2 NC4 14 13 VDDQ VSSQ 10
104 38 47
C87 C88 C89 C90 C91 VDDQ VSSQ
44 VDDQ VSSQ 41
SST 39VF800A70IEKE 104 104 104 104 104
HY57V161610ET-7
ELECTRICAL PARTS LIST
29
ELECTRICAL PARTS LIST - CONTINUED
30
ELECTRICAL PARTS LIST - CONTINUED
31
ELECTRICAL PARTS LIST - CONTINUED
32
ELECTRICAL PARTS LIST - CONTINUED
33
ELECTRICAL PARTS LIST - CONTINUED
34
ELECTRICAL PARTS LIST - CONTINUED
35
SPECIFICATIONS
36