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Aiwa AM-HX70 Service Manual

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AM-HX70
AHK
SERVICE MANUAL
MINIDISC PLAYER
BASIC MD MECHANISM : AZG-F A
• This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
AM-HX70<AHK> (S/M Code No. 09-006-435-8T1).
S/M Code No. 09-009-435-8R1

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  • Page 1 AM-HX70 SERVICE MANUAL MINIDISC PLAYER BASIC MD MECHANISM : AZG-F A • This Service Manual is the "Revision Publishing" and replaces "Simple Manual" AM-HX70<AHK> (S/M Code No. 09-006-435-8T1). S/M Code No. 09-009-435-8R1...

  • Page 2: Specifications

    SPECIFICATIONS Main unit Playback system MiniDisc digital audio system Laser pickup Semiconductor laser Sampling Frequency 44.1 kHz Number of channels Stereo: 2 channels Monaural: 1 channel D/A converter 1-bit 40 to 20,000 Hz ± 4 dB Frequency response 20 to 20,000 Hz ± 1 dB (10 kΩ) Wow and Flutter Below measurable limit (±0.00 1% W.PEAK)

  • Page 3: Protection Of Eyes From Laser Beam During Servicing

    PROTECTION OF EYES FROM LASER BEAM DURING SERVICING CAUTION This set employs laser. Therefore, be sure to follow carefully the instructions below when servicing. Use of controls or adjustments or performance of procedures other than those specified herin may result in hazardous radiation expo- WARNING!! sure.
  • Page 4 DISASSEMBLY INSTRUCTIONS Disassembling and Notes on Reassembling 1. Removing the bottom panel Remove the seven screws A. Open the battery lid and remove the bottom panel. • Assemble the parts from the side of the headphone jack while being careful of the HOLD switch and battery lid. 2.
  • Page 5 3. Removing the Top Panel Remove the four screws A. • When assembling the parts, the claws of the holder should be hooked on the arm (two claws). 4. Removing the center frame Be careful not to contact the pickup during the following procedure. 1) Remove the bottom panel and top panel.

  • Page 6: Electrical Main Parts List

    ELECTRICAL MAIN PARTS LIST REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C209 87-A10-533-080 C-CAP,V 15P-50 J CH C210 87-A10-533-080 C-CAP,V 15P-50 J CH 87-A20-707-010 C-IC,CXA2523AR C216 87-A10-765-080 C-CAP,V 0.033-10 K B 87-A21-608-010 C-IC,CXD2665GA C217 87-A11-751-080 C-CAP,TN 22U-4 M P 8A-HM5-601-010 C-IC,MSM66573L-047TB-9...
  • Page 7 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION L200 87-A50-646-080 C-COIL, 22UH K NLFC201614 R717 87-A91-878-080 C-F-BEAD, BK1608HS241 L400 87-A50-011-080 C-COIL,47UH LQH3C R718 87-A91-878-080 C-F-BEAD, BK1608HS241 L401 87-A50-537-080 C-COIL, 100UH C4-K3L R719 87-A91-878-080 C-F-BEAD, BK1608HS241 L402 87-A50-475-080 C-COIL, 10UH K NLFC201614 S300...

  • Page 8: Transistor Illustration

    TRANSISTOR ILLUSTRATION FDC633N 2SK2009 2SA1588 FDC634P 2SA1832 2SK2035 2SC3265 2SC4738 DTA144EE – 8 –...
  • Page 9 WIRING – 1 (MAIN) <1 / 2> ※ TERMINAL DETAIL FIGURE 10 11 12 13 14 15 16 17 3 142 139 137 133 130 126 124 121 118 116 112 110 2 141 138 135 132 129 127 123 120 117 114 111 109 140 136 134 131 128 125 122 119 115 113 108 106 107 103 104 105...
  • Page 10 WIRING – 1 (MAIN) <2 / 2> – 10 –...
  • Page 11 SCHEMATIC DIAGRAM (MAIN / FLEX JACK) – 11 –...
  • Page 12 WIRING – 2 (FLEX JACK) – 12 –...
  • Page 13 IC BLOCK DIAGRAM MTSW BEEP BSTSW VERFIN PWSW MTTC VREF LPF1 IN-1 OUT1 LPF2 BEEPOA BEEPOB BSTOUT IN+1 OUTB OUTA AGCIN – 13 –...
  • Page 14 IC DESCRIPTION IC, CXD2665GA Pin No. Circuit Pin No. Pin Name Description – – Not connected. – – Not connected. MNT1 Monitor output. – – Not connected. – – Not connected. MNT0 Monitor input/output. MNT3 Monitor output. MNT2 Monitor output. –...
  • Page 15 Pin No. Circuit Pin No. Pin Name Description TST3 Test pin. Set to “L”. TST4 Test pin. Set to “L”. DOUT Digital audio output (Not used). VDC1 – VDD for internal logic (1.8V). – – Not connected. – – Not connected. –...
  • Page 16 Pin No. Circuit Pin No. Pin Name Description Address output for external DRAM (Not used). T-10 (Make sure to leave the pin open when external DRAM is not in use). Address output for external DRAM (Not used). R-10 (Make sure to leave the pin open when external DRAM is not in use). U-11 IXOE Not used.
  • Page 17 Pin No. Circuit Pin No. Pin Name Description M-16 Phase comparison output for playback EFM master PLL. M-15 Playback EFM RF signal input. L-17 PEAK Laser power signal peak hold input (from CXA2523AR). L-16 CLTV Internal VCO control voltage input for playback EFM master PLL. L-15 FILO Filter output for playback EFM master PLL.
  • Page 18 Pin No. Circuit Pin No. Pin Name Description B-13 SRDR Sled servo drive PWM output (–) (Not used). C-13 176.4kHz clock output (X’tal system) (Not used). A-12 SPFD Spindle servo drive output (PWM+ or absolute PWM value). B-12 SPRD Spindle servo drive output (PWM– or polarity). C-12 SFDR Sled servo drive PWM output (+) (Not used).
  • Page 19 Pin No. Circuit Pin No. Pin Name Description Brushless sled motor absolute value PWM output. SLVS (Open when not in use). Brushless sled motor 3-phase drive comparison input (W) / Sled 2-phase drive logic SLCW output (2–). (Connect to GND when not in use). –...
  • Page 20 IC, MSM66573L-047TB-9 Pin No. Pin Name Description XLAT Latch output to CXD2665GA. XRST Reset output to CXD2665GA. EPCS Chip select output to EEPROM. SRDT1 Serial data input to EEPROM. SWDT1 Serial data output to EEPROM. – Not connected. SWCLK1 Serial clock output to EEPROM. –...
  • Page 21 Pin No. Pin Name Description – Not connected. – Not connected. – Not connected. – Not connected. RCDT Remote control data output. – Not connected. – Not connected. – Not connected. – Not connected. AMUTE Line mute control output. “H” for mute. PWSTB TA2131FL power ON/OFF control output.
  • Page 22 Pin No. Pin Name Description KEY1 Main unit KEY input. KEY2 Remote control KEY input. – Not connected. – Not connected. – Not connected. BATCH Supplied voltage monitor input. – Not connected. AGND – Analog GND pin. – Not connected. –...
  • Page 23 IC, BD6606KVT Pin No. Pin Name Description SPWIN SPIN detection comparator input (Phase W). SPCOM SPIN motor coil mid-point input terminal. EXTCLK Synchronized clock input terminal. – CHARGEPUMP capacitor 1 conne ct terminal +. – CHARGEPUMP capacitor 1 connect terminal -. –...
  • Page 24 Pin No. Pin Name Description H1PG2 – H bridge 1 power part GND2. H1ROUT H bridge 1 reverse output. H1VM – H bridge 1 power part power supply. H1FOUT H bridge 1 forward output. H1PG1 – H bridge 1 power part GND1. –...
  • Page 25 IC, CXA2523AR Pin No. Pin Name Description Input "I" RF signal converted to I-V. Input "J" RF signal converted to I-V. Output voltage for VCC/2. Input current for main beam servo signal A. Input current for main beam servo signal B. Input currentt for main beam servo signal C.
  • Page 26 Pin No. Pin Name Description ADDC Capacitor connection pin for ADIP amplifier on return circuit. Output pin for user operational amplifier. (Not used) Non-inverted input pin for user operational amplifier. (Connected to GND) RF amplifier output pin. Check point for eye pattern. MORFI Input pin where Groove RF signal is AC coupled.

  • Page 27: Md Test Mode

    MD TEST MODE Test Mode and Adjustment Mode There are two test modes: operation check mode and adjustment mode. All indications of each mode are performed by using the LCD of the remote control. To move between each operation, use the keys of the unit and the remote control.

  • Page 28: Power Save

    1. Starting up and Terminating the Test Mode 1) Starting up the Test Mode When the test mode starts up, all indicators on the LCD light and [Welcome to ...] is displayed. • While pressing the “B-SKIP” key on the unit and “B-SKIP” key on the remote control, turn on the power.

  • Page 29: Servo Off

    7. Checking the Servo Operation 1) Checking the focus search and spindle kick a. Press the “PLAY/STOP” key without a disk inserted to check the focus search and kick of the spindle motor visually. [Focus Srch] appears. Focus search b. Insert a disk and press the “MENU/ENTER” key then the “PLAY/STOP” key in order. The focus is not locked ([Focus ON!] does not appear) and the S-curve can then be checked.
  • Page 30 2) Checking the EF balance value Press the “DISP” key in the [Focus ON!] state, and check the EF balance DC offset value. Focus ON! SE $ ** SLED ERROR (EF balance) Center value EF balance value SE $80 3) Checking the error rate Press the “DISP”...
  • Page 31 ADJUSTMENT 1. Starting up and Terminating the Adjustment Mode 1) Starting up the adjustment mode Short TP1 on the main board, then turn on the power (insert a battery) while pressing the “PLAY/STOP” key. After the adjustment mode starts up, all the indicators on the LCD light and [ADJ MODE] appears.

  • Page 32: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW 1 / 1 AZG-F A JACK C.B JACK CUSH, BATT - MAIN C.B SH, PANEL BOT – 32 –...

  • Page 33: Mechanical Parts List

    MECHANICAL PARTS LIST 1 / 1 REF. NO. PART NO. KANRI DESCRIPTION 1 8A-HM5-001-010 PANEL ASSY,TOP<[W]AHK> 1 8A-HM5-020-010 PANEL ASSY,TOP L<[L]AHK> 1 8A-HM5-012-010 PANEL ASSY,TOP R<[R]AHK> 2 8A-HM5-205-010 BOX ASSY,BATT 3 8A-ZGF-216-010 HLDR ASSY,CTRG 4 8A-ZGF-207-010 SPR-E,EJECT 5 8A-HM5-004-010 FRAME,CENTER<[W]AHK> 5 8A-HM5-023-010 FRAME,CENTER L<[L]AHK>...
  • Page 34 MD MECHANISM EXPLODED VIEW 1 / 2 CUSH-R MD MECHANISM PARTS LIST 1 / 2 REF. NO. PART NO. KANRI DESCRIPTION 1 8A-ZGF-201-010 CHAS ASSY,MECHA 2 87-A91-488-010 MOT,SSM-01C15A 3 8A-ZGF-208-010 GEAR,A 4 M8-ZZS-294-000 ZZS-2 C 5 8A-ZGF-209-010 GEAR,B 6 8Z-ZG5-217-010 BRG, 1.1-2-2 7 8A-ZGF-210-010 SHAFT,LEAD...

  • Page 35: Accessories / Package List

    ACCESSORIES / PACKAGE LIST REF. NO. PART NO. KANRI DESCRIPTION 1 87-B30-244-010 CHARGER,RB-M02K 2 8A-HM6-951-010 BAG,CARRING 3 87-B30-303-110 BAT,MHB-901(S) 4 87-B30-221-010 CASE,BATTERY 5 87-B30-372-010 HEADPHONE,HP-M031 L1<[L]AHK> 5 87-B30-295-010 HEADPHONE,HP-M031 S<[W]AHK,[R]AHK> 6 8A-HM6-954-010 CLIP,RC-CL33 7 8A-HM3-951-010 BOX,BAT ASSY AHM-3<[W]AHK> 7 8A-HM5-954-010 BOX,BAT ASSY AHM-5 R<[R]AHK>...
  • Page 36 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 9301978 0251431 Printed in Singapore...

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