Akai ACR-18H Service Manual
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Akai ACR-18H Service Manual

Mobile audio system
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MOBILE AUDIO SY STEM
POW ER
OP EN
AUDIO
3 i n 1 C D C A S S E T T E R E C E I V E R
ADJ UST
LOUD
LO C
ST
PUSH
SELEC T
LO UD
SW
A S/PS
EQ
R P T
DIS C
CLAS
TUN E
TRAC K
IR
SKIP
1
2
3
4
5
6
AUX IN
PA U
SC N
RP T
RN D
C D
C D
BAND
MODEL: AKAI ACR-18H

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Summary of Contents for Akai ACR-18H

  • Page 1 3 i n 1 C D C A S S E T T E R E C E I V E R ADJ UST LOUD LO C PUSH SELEC T LO UD A S/PS R P T DIS C CLAS TUN E TRAC K SKIP AUX IN PA U SC N RP T RN D BAND MODEL: AKAI ACR-18H...

  • 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 Wiring Diagram ..............................18 Exploded Views (Panel) ..........................19 Exploded View Parts Lists (Panel) ........................20 Exploded Views (Cabinet) ..........................21 Exploded View Parts Lists (Cabinet) .......................22 Exploded View (Deck) .............................24...

  • Page 3: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. Remove two screws (A) located on the rear of the top cover then remove the Top Cover 2. Remove two screws (B) located on the rear of the bottom cover then remove the Bottom Cover. 3. Remove two screws (C) located front the base. Remove two screws (D) from the rear cabinet and remove two screws (E) from the CD bracket then remove the CD Deck and the CD Bracket.

  • 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 Modulation 400 Hz 30% MOD. FM Stereo 1 kHz 75 kHz DEV. 90% for L only or R only pilot level 10% AF output level FM/MW/LW...

  • Page 6: Block Diagram

    BLOCK DIAGRAM...

  • Page 7: Alignment Locations

    ALIGNMENT LOCATIONS FM/MW/LW 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 REMOTE BOARD TOP VIEW...
  • Page 16 REMOTE BOARD BOTTOM VIEW...
  • Page 17 FRONT BOARD...

  • Page 18: Wiring Diagram

    WIRING DIAGRAM...

  • Page 19: Exploded Views (Panel)

    EXPLODED VIEW PANEL...

  • Page 20: Exploded View Parts Lists (Panel)

    EXPLODED VIEW PARTS LIST PANEL Ref. No. Description RS Part No. Mfr’s Part No. Lens: (S. PMS8180C#) W/RM/CDC/SW 53-C4853-12C Top Panel (S. OPC0201) W/O Brand 51-C4821-82Y Bottom Panel /777 51-C4822-00 LOUD/SW (E-Silver) 52-C4824-91E LOC/AS/PS (L-Up) (S. OPC0201) 52-C2825-81 Sponge (LOC) Black 81-C4803-00 DSP/MO/ST (L-Up) (S.

  • Page 21: Exploded Views (Cabinet)

    EXPLODED VIEW CABINET...

  • Page 22: Exploded View Parts Lists (Cabinet)

    EXPLODED VIEW PARTS LIST CABINET Ref. No. Description RS Part No. Mfr’s Part No. Panel Base (S. OPC0201) 777 51-C2823-80 Top Cover 61-C4803-00 Bottom Cover 61-C4804-00 Bare MECH. MDAJ03B/TR2 94-01201-03 W/F-36 (MCI5ULCKNZ/AP-4226) 94-00036-10W MPCB Fiber 0.5MM 35-C4802-00 12-01480-055 Main Board Rear Cabinet 61-C4802-00 Heat Sink...
  • Page 23 Ref. No. Description RS Part No. Mfr’s Part No. 22PIN Socket CD1421 (JENSEN) 25-M1421-22 Antenna Socket J-020-03 Signal. Hole 39-00017-02 Screw Ø2 X 3 CH/MS Black 40-12003-09H Screw Ø2 X 6 BH/ST 40-12006-01 Screw Ø2.6 X 3 PH/MS 40-02603-00 Screw Ø2.6 X 3 PH/TAPTITE 40-02604-03 Screw Ø2.6X4 BH/MS 40-02604-01...

  • Page 24: Exploded View (Deck)

    EXPLODED VIEW (CD DECK)

  • Page 25: Exploded View Parts List (Deck)

    EXPLODED VIEW PARTS LIST (CD 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 26 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 BUTHYL S/P BASE...

  • Page 27: Schematic Diagram

    SCHEMATIC DIAGRAM (MAIN BOARD)
  • Page 28 SCHEMATIC DIAGRAM (CD SERVO BOARD)
  • Page 29 SCHEMATIC DIAGRAM (REMOTE BOARD)

  • Page 30: Electrical Parts List

    ELECTRICAL PARTS LIST Ref. No. Part No. Description Q’ty PC BOARD ASSY, MAIN BOARD Q806,814/7 01-00435-00S TR. BD435 NPN TO-126 SAMSUNG Q801,815 01-00812-00 TR. 2SA812 Q809,811 01-01240-00 TRANSISTOR B1240 Q101/5/6,302,321~4,404,501,802~5/8, 01-01623-00 CHIP TR. C1623 “NEC” 810/2/3/6,881 Q102/3 01-02785-00C TRANSISTOR 2SC2785 “NEC” Q891/2 01-04672-00 TR.
  • Page 31 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty C308/9 05-63222-01 CHIP 2200PF ±10% X7R 0603 SMT C101/2/4/6,120,401,811/6 05-63223-01 CHIP 0.022µF ±10% X7R 0603 SMT C507/8 05-63272-01 CHIP 2700PF ±10% X7R 0603 SMT C405/6 05-63330-00 CHIP CAP 33PF ±5% NPO 0603 SMT C805~8 05-63332-01 CHIP 3300PF ±10% X7R 0603 SMT...
  • Page 32 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty R115/6,311,503,531/2 07-63332-00 CHIP RES. 3.3kΩ ±5% 0603 SMT R820,836 07-63471-00 CHIP RES. 470Ω ±5% 0603 SMT R520/5/9,530 07-63472-00 CHIP RES. 4.7kΩ ±5% 0603 SMT R111~3,308,321/3/5,401~11,427,434/8 07-63473-00 CHIP RES. 47kΩ ±5% 0603 SMT ~42,506,824/9~31/3,882,430~2,823A, ,821 07-63474-00...
  • Page 33 ELECTRICAL PARTS LIST – CONTINUED Ref. No. Part No. Description Q’ty CCF1 02-00138-00 CF-32104F (104X3.2) CCT-138X3.4 D001 02-04148-00 DIODE IN-4148 IC001 03-75873-00 IC LC75873 NW (SQFP80) C008~10 05-63103-01 CHIP 0.01µF ±10% X7R 0603 SMT C001/2/4/6/7 05-63104-01 CHIP 0.1µF ±10% X7R 0603 SMT C003 05-63221-00 CHIP 220PF ±5% NPO 0603 SMT...
  • Page 34 ELECTRICAL PARTS LIST – CONTINUED Ref. No. Part No. Description Q’ty 03-09268-00 IC KS9286 D1,2 04-00169-00 CRYSTAL HC-49/US 16.9344MHz 05-03040-05 CHIP CER 4P 50V J CH TA 05-03080-05 CHIP CER 8P 50V J CH TA 05-03102-10 CHIP CER 1000P 50V K Y5P TA C2,4,14/6,21/6,30/3 05-03103-10A CHIP CER 0.01µF 50V K Y5P TA...
  • Page 35 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty R55,60 07-05332-54 CHIP RES. 3.3kΩ 1/10W R13,27 07-05434-54 CHIP RES. 430kΩ 1/10W R20,47 07-05473-54 CHIP RES. 47kΩ 1/10W 07-05562-16A RES. 5.6kΩ 1/16W (TAPPING) R5~10 07-05562-54 CHIP RES. 5.6kΩ 1/10W 07-05564-54 CHIP RES.
  • Page 36 ELECTRICAL PARTS LIST - CONTINUED Ref. No. Part No. Description Q’ty R607 07-63223-00 CHIP RES. 22kΩ ±5% 0603 SMT R608 07-63273-00 CHIP RES. 27kΩ ±5% 0603 SMT R603/4,610/3/4 07-63473-00 CHIP RES. 47kΩ ±5% 0603 SMT R602/6,611/6 07-63822-00 CHIP RES. 8.2kΩ ±5% 0603 SMT PC BOARD ASSY, TONE BOARD Q591/2 01-01623-00...

  • Page 37: Specifications

    SPECIFICATIONS T. H. D ····································································································································· Less than 0.35% Signal to Noise Radio ··········································································································· More than 55 dB Channel Separation ················································································································ More than 50 dB Frequency Response·································································································20Hz - 20kHz (CD Player) Frequency Response··························································································50Hz - 8kHz (Cassette Player) Stereo separating (FM) ············································································································· 30 dB (at 1kHz) Signal to noise ratio (FM)·········································································································Better than 50 dB Output power...

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