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Akai ACR-24MPU Service Manual

Pll synthesizer stereo radio with compact disc player digital
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PLL SYNTHESIZER STEREO RADIO WITH
COMPACT DISC PLAYER DIGITAL
ENT/LOU
BND
OPEN
POWER
IR
EQ
Push
SEL
0
DSP
D-AUD
9
AMS
REG
REC
DIR
AF
TA
PTY
8
1
2
3
4
5
6
MOD
PAU
SCN
RPT
SHF
MODEL: ACR-24MPU

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Summary of Contents for Akai ACR-24MPU

  • Page 1 PLL SYNTHESIZER STEREO RADIO WITH COMPACT DISC PLAYER DIGITAL ENT/LOU OPEN POWER Push D-AUD MODEL: ACR-24MPU...

  • Page 2: Table Of Contents

    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) ............................17 Exploded View Parts Lists (Panel) ........................18 Exploded Views (Cabinet) ........................... 19 Exploded View Parts Lists (Cabinet) ........................

  • Page 3: Disassembly Instructions

    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.

  • Page 4: Disassembly Diagram

    DISASSEMBLY DIAGRAM...

  • Page 5: Operation Check

    OPERATION CHECK GENERAL SPECIFICATIONS OF SIGNAL Standard frequency 98.1 MHz (87.5, 108 MHz) 1000 kHz (522, 1620 kHz) 200 kHz (144, 288 kHz) Signal output 5 mV 5 mV Modulation 400 Hz 30% MOD. FM Stereo 1 kHz 75kHz DEV. 46% for L only or R only pilot level 8% AF output level...

  • Page 6: Block Diagram

    BLOCK DIAGRAM...

  • Page 7: Alignment Locations

    ALIGNMENT LOCATIONS FM TUNER BOARD...

  • Page 8: Alignment Procedures

    ALIGNMENT PROCEDURES FM ADJUSTMENT Equipment Required AM IF/RF signal generator Solid-state voltmeter (SSVM) Regulated DC power supply 2-CH voltmeter Distortion 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.

  • Page 9: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS MAIN BOARD TOP VIEW...
  • Page 10 MAIN BOARD BOTTOM VIEW...
  • Page 11 KEY BOARD TOP VIEW...
  • Page 12 KEY BOARD BOTTOM VIEW...
  • Page 13 CD SERVO BOARD TOP VIEW...
  • Page 14 CD SERVO BOARD BOTTOM VIEW...
  • Page 15 REMOTE BOARD...
  • Page 16 REMOTE BOARD...

  • Page 17: Exploded Views (Panel)

    EXPLODED VIEW PANEL...

  • Page 18: Exploded View Parts Lists (Panel)

    EXPLODED VIEW PARTS LIST PANEL Ref. No. Description RS Part No. Mfr’s Part No. Lens; (OPC0000/PMS422C) LCD W/RM X60.16 53-J2122-35Y Panel –F (OP2001/White) LCD X60.16 “USB” 51-J2121-31B Panel Bottom (F) 51-J2137-00 VOL Knob (E. Silver) 52-J2130-90E Round Decoration (E-Silver) 52-J2131-90E Open Key (L-Up) (OP0000) 52-J2147-30 RE Knob Spring...

  • Page 19: Exploded Views (Cabinet)

    EXPLODED VIEW CABINET...

  • Page 20: Exploded View Parts Lists (Cabinet)

    EXPLODED VIEW PARTS LIST CABINET Ref. No. Description RS Part No. Mfr’s Part No. Panel Ring (S. OP2001) 51-G2121-30G Base (PC) 51-E2124-00P Side Bracket (CD200/Wire) 61-E2005-04 CD MECH. CDM-1683EUK W/O Bracket (143A) 94-01683-11 Heat Sink (For Wire) 61-E2006-00 Top Cabinet 61-B0105-01 Bottom Cabinet (For Wire) 61-B0114-01...
  • Page 21 Ref. No. Description RS Part No. Mfr’s Part No. Screw Ø2X6 PA/ST Black 40-12006-20 Screw Ø2.6X4 BH/MS 40-02604-01 Screw Ø2.6X5 BH/TAPTITE 40-02605-03 Screw Ø2.6X6 BH/MS 40-02606-01 Screw Ø2.6X6 PH/MS Black 40-02606-20 Screw Ø2.6X8 BH/MS 40-02608-01 Screw Ø2.6X10 BH/MS 40-02610-01 Screw M2.6X20 PH/MS 40-02620-00...

  • Page 22: Exploded Views (Deck)

    EXPLODED VIEW (DECK)

  • Page 23: Exploded View Parts Lists (Deck)

    EXPLODED VIEW PARTS LIST (DECK) Ref. No. Description Parts No. Q’ty SENSOR ST-23G SENSOR PCB SCREW CA/H 0” TT 2*3 COVER-UPPER SECC T1.0 LEVER DISC POM (F20-03) GUIDE UP POM (F20-03) BUSHING ROLLER POM (F20-03) ROLLER DISC SLICON SHAFT ROLLER SUS 303 PIN ROLLER SUM24L-NI (PLATE)
  • Page 24 EXPLODED VIEW PARTS LIST - CONTINUED (DECK) Ref. No. Description Parts No. Q’ty CLAMP DISC POM (F20-03) HOLD CLAMPER SECC T1.0 S/P CLAMPER SUS304WPB TURN TABLE ABS G/F 20% BASE PU POM (F20-03) PIN SIDE (A) SUM24L-NI (PLATE) SCREW CA/H 0” M/S 1.7*2.5 PIN SIDE (B) SUM24L-NI(PLATE) DAMPER...

  • Page 25: Schematic Diagram

    SCHEMATIC DIAGRAM (MAIN BOARD)
  • Page 26 SCHEMATIC DIAGRAM (KEY BOARD)
  • Page 27 SCHEMATIC DIAGRAM (CD SERVO BOARD)
  • Page 28 SCHEMATIC DIAGRAM (REMOTE BOARD)

  • Page 29: Electrical Parts List

    ELECTRICAL PARTS LIST Ref. No. Part No. Description Q’ty PC BOARD ASSY, MAIN BOARD Q801 01-00435-00S TR. BD435 TO-126 FAIRCHLD Q817 01-00435-00S TR. BD436 PNP TO-126 SAMSUNG Q104,802/9 01-00812-00 TR. 2SA812 Q812 01-01240-00 TRANSISTOR B1240 Q105~7,601,801/3~6/8,811/6 01-03875-07 TRANSISTOR 2SC3875G IC802 01-07805-00 IC-REGULATOR 78L05 Q807...
  • Page 30 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty C618,819 06-16226-01 E. CAP 22µF 16V (Ø4X7MM) C701 06-16227-01 E. CAP 220µF 16V (Ø6.3X12MM) C810 06-16338-00S E. CAP 3300µF 16V 105°C C116/7,122,610/1,801~4 06-50105-01 E. CAP 1µF 50V (Ø4X7 MM) C614/9,624~7,631/2,703~6 06-50225-01 E.
  • Page 31 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty R125/6,608,641,706/7,712/3,823,846/7/9 07-63473-00 CHIP RES. 47kΩ ±5% 0603 SMT R622 07-63512-00 CHIP RES. 5.1k ±5% 0603 SMT R809~12 07-63561-00 CHIP RES. 560Ω ±5% 0603 SMT R624 07-63752-00 CHIP RES. 7.5kΩ ±5% 0603 SMT R716~9 07-63821-00 CHIP RES.
  • Page 32 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty C201~3 05-63223-01 CHIP 0.022µF ±10% X7R 0603 SMT C204 06-16106-02E E. CAP. 10µF/16V (4X5MM RC3) R209 07-05100-16A RES 10Ω 1/16W (TAPPING) R205/7/8 07-63102-00 CHIP RES 1kΩ ±5% 0603 SMT R201/3 07-63103-00 CHIP RES 10kΩ...
  • Page 33 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty Q305 01-00435-00S TR. BD435 NPN TO-126 SAMSUNG Q2,304 01-00812-00 TR. 2SA812 01-01225-13 TRANSISTOR 2SD1225M Q301/3 01-03875-07 TRANSISTOR 2SC3875G SD1,2 02-00144-00 IR LED MIE 144A1MC 02-04148-00A DIODE IN-4148 AT. (TAPPING) 02-50036-00 ZENER DIODE 3.6V ±5% 0.5W D2~7...
  • Page 34 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty C301/2 06-50225-02 E. CAP 2.2µF 50V (4X5) 07-05047-00 RES. 4.7Ω 1/4W R305 07-05103-16A RES. 1kΩ 1/16W (TAPPING) R12,33,64/5,86/7,110/3 07-63000-00 CHIP RES 0Ω 0603 SMT R26/7 07-63015-00 CHIP RES 1.5Ω 0603 SMT R42/3 07-63030-00 CHIP RES 3.0Ω...
  • Page 35 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty 12-05802-120 PCB CDX3.60.16.4 SERVO D/S 110X101X1.2MM 16-00033-01 MICRO SWITCH MPU10371MLBO (MIC) PC BOARD ASSY, REMOTE BOARD Q500 01-01781-18 TR. 2SD178K-R “ROHM” LD901 02-00334-00 INFRARED LED Ø3MM MIE-334A4 D500/1 02-04148-00 DIODE IN-4148 IC500 03-00101-00...

  • Page 36: Specifications

    SPECIFICATIONS T. H. D............................Less than 0.35% Signal to Noise Radio ........................More than 60 dB Channel Separation ........................More than 60 dB Frequency Response .......................... 20Hz-20kHz Stereo Separating (FM) ........................30 dB (at 1kHz) Signal to Noise Ratio (FM) ......................Better than 50 dB Output Power.............................

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