Akai ACR-224MMU Service Manual Download Page 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.

4.

Take out the Front Panel and the Ring.

Remove the 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 on the back of the Rear-right bracket then remove the ISO Antenna

Socket/Short W/Holder.

7.

Remove two screws (H) from under the deck front bracket then remove the Deck Front Bracket.

Remove two screws (I) from under the deck rear bracket then remove the Deck Rear Bracket and the Deck.

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 two screws (M) from each side of the base then remove the Base.

12.

Remove the screw (N) from right side of the Rear-right bracket then remove the Hexagon Nut..

13.

Remove the screw (O) from on the back of the Rear-right then remove ISO 36PIN Socket.

14.

Remove three screws (P) from under the main board then remove the Heat Sink, Rear-right Bracket and the

Main Board.

Summary of Contents for ACR-224MMU

Page 1: ......

Page 2: ...r right bracket then remove the ISO Antenna Socket Short W Holder 7 Remove two screws H from under the deck front bracket then remove the Deck Front Bracket Remove two screws I from under the deck rea...

Page 3: ...DISASSEMBLY DIAGRAM...

Page 4: ...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 s...

Page 5: ...BLOCK DIAGRAM...

Page 6: ...ALIGNMENT LOCATIONS MITSUMI BOARD...

Page 7: ...rator 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 a...

Page 8: ...PRINTED CIRCUIT BOARDS MAIN BOARD TOP VIEW...

Page 9: ...MAIN BOARD BOTTOM VIEW...

Page 10: ...KEY BOARD TOP VIEW...

Page 11: ...KEY BOARD BOTTOM VIEW...

Page 12: ...CD SERVO BOARD TOP VIEW...

Page 13: ...CD SERVO BOARD BOTTOM VIEW...

Page 14: ...FRONT BOARD TOP VIEW...

Page 15: ...FRONT BOARD BOTTOM VIEW...

Page 16: ...BT BOARD TOP VIEW...

Page 17: ...BT BOARD BOTTOM VIEW...

Page 18: ...TC ISO BOARD TOP VIEW...

Page 19: ...TC ISO BOARD BOTTOM VIEW...

Page 20: ...21 EXPLODED VIEW PANEL...

Page 21: ...S PHONE OFF BND KB S N1204 ROHS PHONE ON KB S N1204 ROHS KEY BOARD AXIS POST 2 0X60 ROHS RIGHT SIDE BLOCK ROHS CONTACT SPRING ROHS LEFT SIDE BLOCK ROHS E RING 1 5X0 4X0 4MM HARDEN ROHS RE KNOB SPRING...

Page 22: ...23 EXPLODED VIEW CABINET...

Page 23: ...Left Bracket ROHS Deck Front Bracket ROHS Deck Rear Bracket For CD ROHS M FAE347 P21 P22 East Furepe 1 Pack 65 108MHJ ROHS Shield Cover Mitsumi Tuner 0 045KG ROHS IC Bracket For Regulntor ROHS ISO An...

Page 24: ...w M2X3 P H Black ROHS Screw 2 6X4 BH MS ROHS Screw 2 6X5 BH TAPTITE ROHS Screw M2 6X20 PH MS ROHS Screw 2 6X6 BH MS ROHS Screw 2 6X6 PH MS BLACK ROHS Screw 2 6X8 BH MS ROHS Screw 2X4 BH ST Black ROHS...

Page 25: ...26 EXPLODED VIEW DECK...

Page 26: ...AD 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...

Page 27: ...RING TENSION GEAR PU LEAD SCREW SWITCH SCREW PICK UP FPC WIRE SPRING PU FIBER PAPER S P CAM TRANSIT SCREW INSULATOR COVER SWITCH WASHER PE S P BASE POM F20 03 SECC T1 0 SUS304WPB ABS G F 20 POM F20 03...

Page 28: ...29 SCHEMATIC DIAGRAM MAIN BOARD...

Page 29: ...30 SCHEMATIC DIAGRAM KEY BOARD...

Page 30: ...31 SCHEMATIC DIAGRAM CD SERVO BOARD...

Page 31: ...00 506016 00 CABLE BT CD5060 16PIN SOCKET WIRE P 1 25MM ROHS 1 ZD601 602 0200 000062 07 E S D DIODE SMD NNCD6 2G SOT23 5L ROHS 2 D615 627 108 109 619 621 0200 004148 02 DIODE SMD RLS4148 LL 34 ROHM RO...

Page 32: ...S 8 C208 704 705 706 0500 016225 54 TAN CAP SMD 2 2uF 16V 10 3 2 1 6 1 6MM ROHS 5 C850 0500 016475 10 TAN CAP SMD 4 7uF 16V 10 3 2 1 6 1 6MM ROHS 1 C817 0500 063101 00 CER CAP SMD 100PF 50V 5 NPO 0603...

Page 33: ...0700 063124 00 RES SMD 120K 5 1 10W 0603 ROHS 1 R818 0700 063152 00 RES SMD 1 5K 5 1 10W 0603 ROHS 1 R830 0700 063182 00 RES SMD 1 8K 5 1 10W 0603 ROHS 1 R814 817 0700 063184 00 RES SMD 180K 5 1 10W...

Page 34: ...SMD PURE GREEN LUM 25MCD WL 525NM 0805 WENRUN ROHS 1 LED1 3 5 21 0200 001112 06 M LED SMD BLUE WL 14 5MCD WL 470NM 0805 ROHS 20 D1 0200 004148 02 DIODE SMD RLS4148 LL 34 ROHM ROHS 1 IC601 0300 000091...

Page 35: ...PN 2SC3875G SOT 23 NEC ROHS 2 D616 0200 004148 02 DIODE SMD RLS4148 LL 34 ROHM ROHS 1 ZD301 0200 050091 01 ZENER DIODE SMD 9 1V 0 5W 5 LL 34 ROHS 1 C301 302 0500 003225 10 CER CAP SMD 2 2uF 25V 20 X7R...

Page 36: ...C4 5 0500 063472 01 CER CAP SMD 4700PF 50V 10 X7R 0603 ROHS 2 C60 0500 063681 00 CER CAP SMD 680PF 50V 5 NPO 0603 ROHS 1 C70 0500 063823 01 CHIP 82000PF 10 X7R 0603 SMT ROHS 1 C12 17 26 61 0600 01610...

Page 37: ...12MHZ 30PPM HC 49U S ROHS 1 XT1 0400 000169 00 R CRYSTAL OSCILLATOR 16 9344MHZ 30PPM HC 49U S ROHS 1 SW1 1600 000111 00 SWITCH PUSH LEVER SW 111 8 5 3 3 8MM SHINMEI ROHS 1 CON1 2500 000090 03 RAINBOW...

Page 38: ...0603 ROHS 1 C335 336 0500 063152 01 CER CAP SMD 1500PF 50V 10 X7R 0603 ROHS 2 C331 0600 016107 54 E CAP SMD 100uF 16V 10 6 3 5 5MM ROHS 1 R332 333 0700 063100 00 RES SMD 10 5 1 10W 0603 ROHS 2 R334 0...

Page 39: ...2 R20 23 0700 063154 00 RES SMD 150K 5 1 10W 0603 ROHS 2 R25 0700 063222 00 RES SMD 2 2K 5 1 10W 0603 ROHS 1 R3 8 10 12 13 27 45 0700 063223 00 RES SMD 22K 5 1 10W 0603 ROHS 11 R31 0700 063224 00 RES...

Page 40: ...kHz Stereo Separating FM 30 dB at 1kHz Signal to Noise Ratio FM Better than 50 dB Output Power 4 X 40W Speaker Output Impedance 4 To 8 ohm Power Source DC 12V Negative ground Frequency Range FM 65 0 7...

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