Akai ACR-26MPU Service Manual
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Akai ACR-26MPU Service Manual

Pll synthesizer stereo radio with compact disc player digital
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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
RELEASE
PUSH
SEL
PO WER
MUT
LO C
MON
1
2
PAU
SC N
MODEL: ACR-26MPU
C AR C D/MP3/WMA PLAYER
DIR
3
4
5
RPT
SHF
E
REC
Q
D
0
S
P
D-AUD
AMS
9
7
SW
8
MOD
6
EJEC T
LOU/ENT
BND

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Summary of Contents for Akai ACR-26MPU

  • Page 1 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 RELEASE EJEC T C AR C D/MP3/WMA PLAYER PUSH D-AUD PO WER LOU/ENT LO C SC N MODEL: ACR-26MPU...

  • 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) ............................15 Exploded View Parts Lists (Panel) ........................16 Exploded Views (Cabinet) ........................... 17 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 (65, 108 MHz) 1000 kHz (522, 1620 kHz) 200 kHz (144, 288 kHz) Signal output 1 mV 5 mV 5 mV Modulation 400 Hz 30% MOD. FM Stereo 1 kHz 75kHz DEV.

  • Page 6: Block Diagram

    BLOCK DIAGRAM...

  • Page 7: Alignment Locations

    ALIGNMENT LOCATIONS MITSUMI TUNER...

  • 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: Exploded Views (Panel)

    EXPLODED VIEW PANEL...

  • Page 16: Exploded View Parts Lists (Panel)

    EXPLODED VIEW PARTS LIST PANEL Ref. No. Description RS Part No. Mfr’s Part No. Lens; (S. OPC0000) DX3.59.16 53-C2520-328 T. Panel (S. OPC2001) W/D 51-C2521-31Y Panel Bottom 51-C2522-00 Release Key (S. OP2001) 52-C2535-31Y RE Knob Spring 36-11852-00 Power Key (L-Up) (S. OP2001) 52-C2522-31 PWR Knob Adaptor 52-C2548-00...

  • Page 17: Exploded Views (Cabinet)

    EXPLODED VIEW CABINET...

  • Page 18: Exploded View Parts Lists (Cabinet)

    EXPLODED VIEW PARTS LIST CABINET Ref. No. Description RS Part No. Mfr’s Part No. Panel Ring /ABS (S. OP20001) 51-E2022-30Y Base Real (E) /777 51-E2020-00 61-N0201-00 Side Bracket (CD200 Wire) CD MECH. CDM-1684EUK W/O 146A NO BP 94-01684-12 Heat Sink (For Wire) 61-N0204-00 Top Cabinet 61-B0105-01...

  • Page 19: Exploded Views (Deck)

    EXPLODED VIEW (DECK)

  • Page 20: 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 21 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 22: Schematic Diagram

    SCHEMATIC DIAGRAM (MAIN BOARD)
  • Page 23 SCHEMATIC DIAGRAM (KEY BOARD)
  • Page 24 SCHEMATIC DIAGRAM (CD SERVO BOARD) C58 101P NPO 101 NPO OPIN1+ OPIN4+ R100 OPIN1- OPIN4- OPOUT1 OPOUT4 102 NPO OPEN OPIN2+ OPIN3+ OPIN2- OPIN3- OPOUT2 OPOUT3 101 NPO C60 101P NPO R101 PGND PGND 102 NPO OPEN REGO VCCI MUTE VOL- BIAS VOL+...

  • Page 25: 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 26 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty C836/7 06-16107-01 E. CAP 100µF 16V (Ø6.3X7MM) 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.
  • Page 27 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty R607 07-63334-00 CHIP RES. 330kΩ ±5% 0603 SMT R135,140,850 07-63471-00 CHIP RES. 470Ω ±5% 0603 SMT R122,602/4/6,611,840 07-63472-00 CHIP RES. 4.7kΩ ±5% 0603 SMT 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.
  • Page 28 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty ZD603 02-50062-54 ZENER DIODE SMD 6.2V (LLDS) 1206 IC601 03-75823-00 IC LC75823ED C604 05-63223-01 CHIP 0.022µF ±10% X7R 0603 SMT C603 05-63681-00 CHIP 680PF ±5% NPO 0603 SMT R646 07-63103-00 CHIP RES 10kΩ...
  • Page 29 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty 03-00760-00 USB+MMC (SD) DSP TCC760 TQFP-128 TELECHIPS 03-01642-00 VOLTAGE LDO REGULATOR IC IP1642L INTERPION 03-05341-00 A/D CONVERTER IC CS5341-DZZ CIRRUS LOGIC 03-09004-00 IC 5-CH MOTOR DRIVER IP9004 INTERPION 03-16100-00 SDRAM IS42S16100C1-7TI TSOP-50 ISSI 03-39800-00 SST FLASH 39VF 800A-70-4I-EK TSOP-48...
  • Page 30 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty R36,62/7/8,71~6,104,309 07-63102-00 CHIP RES 1kΩ ±5% 0603 SMT R7~11/4~9,23~5/9~32,88,100,120,310/7 07-63103-00 CHIP RES 10kΩ ±5% 0603 SMT R66/9,70,80,95,316 07-63104-00 CHIP RES 100kΩ ±5% 0603 SMT 07-63105-00 CHIP RES 1MΩ ±5% 0603 SMT R106 07-63106-00 CHIP RES 10MΩ...

  • Page 31: 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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