Aiwa XR-HG2MDK Service Manual
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Aiwa XR-HG2MDK Service Manual

Aiwa XR-HG2MDK Service Manual

Md/cd stereo system
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SERVICE MANUAL
MD / CD STEREO SYSTEM
SYSTEM
XR-HG2MD
• If requiring information about the CD mechanism, see Service Manual of
AZG-1 YSB3RMDM, (S/M Code No. 09-001-335-3NE).
• If requiring information about the MD mechanism, see Service Manual of
AZG-E D, (S/M Code No. 09-006-347-9N2).
XR-HG2MD
BASIC TAPE MECHANISM : ZZM-2 YPR1NF
BASIC CD MECHANISM : AZG-1 YSB3RMDM
BASIC MD MECHANISM : AZG-E D
CD
CASSEIVER
CX-NHG2MD
S/M Code No. 09-00B-437-4N2
REMOTE
SPEAKER
CONTROLLER
SX-NHG2
RC-ZAS16
K, EZ

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Summary of Contents for Aiwa XR-HG2MDK

  • Page 1 XR-HG2MD K, EZ SERVICE MANUAL BASIC TAPE MECHANISM : ZZM-2 YPR1NF MD / CD STEREO SYSTEM BASIC CD MECHANISM : AZG-1 YSB3RMDM BASIC MD MECHANISM : AZG-E D REMOTE SYSTEM SPEAKER CASSEIVER CONTROLLER XR-HG2MD CX-NHG2MD SX-NHG2 RC-ZAS16 • If requiring information about the CD mechanism, see Service Manual of AZG-1 YSB3RMDM, (S/M Code No.

  • Page 2: Specifications

    SPECIFICATIONS Main unit <MD recorder section> <FM tuner section> Scanning method Non-contact optical scanner Tuning range 87.5 MHz to 108 MHz (Semiconductor laser application) Usable sensitivity (IHF) 16.8 dBf Recording system Magnetic polarity modulation Antenna terminals 75 ohms (unbalanced) overwrite system Rotation speed Approx.

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

    PROTECTION OF EYES FROM LASER BEAM DURING SERVICING This set employs laser. Therefore, be sure to follow carefully CAUTION the instructions below when servicing. Use of controls or adjustments or performance of proce- dures other than those specified herin may result in WARNING!! hazardous radiation exposure.

  • Page 4: Note On Before Starting Repair

    NOTE ON BEFORE STARTING REPAIR 1. Forced discharge of electrolytic capacitor of power supply block When repair is going to be attempted in the set that uses relay circuit in the power supply block, electric potential is kept charged across the electrolytic capacitors (C101, 102) even though AC power cord is removed.
  • Page 5 In such a case, check also if the POWER AMPLIFIER circuit or power supply circuit has any abnormalities or not. 2-2. Regarding reset There are cases that the machine does not work correctly because the MICROCOMPUTER is not reset even though the AC power cord is re-inserted, or the software reset (pressing the STOP key + POWER key) is performed.

  • Page 6: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. Remove the four screws (A) (BVT 2+3-10 W/O SLOT). 3. Remove the HLDR, SHLD TOP in the direction of the arrow. Remove the AZG-H in the direction of the arrow. HLDR, SHIELD TOP AZG-H AZG-H B2 2. Remove the two screws (A) (S-SCREW, MDT), two screws (B) (S-SCREW, MD) and four screws (C) (VTT+3-4).
  • Page 7 4. Remove the two screws (A) (VTT+2-4), and remove the PLATE ASSY, SIDE L and PLATE SIDE R in the direction of the arrow. Remove the screw (B) (VW+1.7-5 W/O MFZN2C), and remove the HEAD and OWH RF325-74A in the direction of the arrow. CAM, LOAD HEAD, OWH RF325-74A PLATE ASSY,...
  • Page 8 6. Remove the CAM, LOAD in the direction of arrow. Note During Assembling: Rotate the gear fully in the direction of the arrow. Set up the mechanism so that the reference holes of CAM, LOAD are positioned closest to the shaft of LEVER, SW H. Let the CAM and LOAD engage with the teeth of GEAR, IDLER2.

  • Page 9: Electrical Main Parts List

    ELECTRICAL MAIN PARTS LIST REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C103 87-010-545-080 CAP, ELECT 0.22-50V C104 87-010-545-080 CAP, ELECT 0.22-50V 8A-DBA-630-010 C-IC,LC876572V-5R90 C105 87-010-186-080 CAP,CHIP 4700P 87-A21-482-010 IC,RPM6938-H4 C106 87-010-186-080 CAP,CHIP 4700P 87-A21-419-040 C-IC,NJM14558MD-TE2 C107 87-010-403-080 CAP, ELECT 3.3-50V...
  • Page 10 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C605 87-010-181-080 CAP,CHIP S 1800P C876 87-010-405-080 CAP, ELECT 10-50V C606 87-010-181-080 CAP,CHIP S 1800P C877 87-010-197-080 CAP, CHIP 0.01 DM C609 87-010-213-080 C-CAP,S 0.015-25 B C878 87-010-316-080 C-CAP,S 33P-50 C610 87-010-213-080...
  • Page 11 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION L942 87-A50-019-010 COIL,OSC LW(COI) 856KHZ S403 87-A91-024-180 SW,TACT KSHG0611BT L951 8A-NF8-668-010 COIL,AM PACK 2 (TOK) S404 87-A91-024-180 SW,TACT KSHG0611BT R129 87-A00-258-080 RES,M/F 0.22-1W J S405 87-A91-024-180 SW,TACT KSHG0611BT R130 87-A00-258-080 RES,M/F 0.22-1W J...

  • Page 12: Transistor Illustration

    CHIP RESISTOR PART CODE Chip Resistor Part Coding Figure Resistor Code Value of resistor Chip resistor Dimensions (mm) Symbol Wattage Type Tolerance Resistor Code Form 1/16W 1005 0.35 1/16W 1608 0.45 1/10W 2125 1.25 0.45 1/8W 3216 0.55 TRANSISTOR ILLUSTRATION E C B E C B B C E...
  • Page 13 IC BLOCK DIAGRAM – 13 –...
  • Page 14 – 14 –...
  • Page 15 WIRING – 1 (MAIN) – 15 –...
  • Page 16 SCHEMATIC DIAGRAM – 1 (MAIN 1 / 2 : FUNCTION / TAPE / P - SUPPLY / P - AMP SECTION) – 16 –...
  • Page 17 SCHEMATIC DIAGRAM – 2 (MAIN 2 / 2 : TUNER SECTION) – 17 –...
  • Page 18 WIRING – 2 (FRONT) <1 / 2> – 18 –...
  • Page 19 WIRING – 2 (FRONT) <2 / 2> – 19 –...
  • Page 20 SCHEMATIC DIAGRAM – 3 (FRONT) – 20 –...
  • Page 21 WIRING – 3 (PT) – 21 –...

  • Page 23: Wiring - 4 (Deck)

    WIRING – 4 (DECK) – 23 –...
  • Page 24 FL (11– BT –177GNK) GRID ASSIGNMENT & ANODE CONNECTION & PIN CONNECTION GRID ASSIGNMENT – 24 –...
  • Page 25 ANODE CONNECTION PIN CONNECTION – 25 –...
  • Page 26 IC DESCRIPTION IC, LC876572V-5R90 Pin No. Pin Name Description O-SQCLK/I-STEREO Output SQCLK/Input tuner stereo detection. O-CD.CLOSE Output CD tray close. O-PB1 Output deck 1/2 switching. O-CD.DATA/ Output for CD data/Input for RDS data detection. I-RDS DATA O-TU_ON Output tuner ON. O-DSC/PLL.DATA Output data for LED driver, tuner IC and function IC.
  • Page 27 Pin No. Pin Name Description AM10K/P16 Input for AM10K diode (Not used)/Output FL segment (P16). ECO OFF/P15 Input for ECO OFF diode/Output FL segment (P15). CASINO DEMO/P14 Input for CASINO DEMO diode/Output FL segment (P13). DEMO/P13 Input for DEMO diode/Output FL segment (P13). CD>MD (HIGH)/P12 Input for CD>MD (HIGH) diode/Output FL segment (P12).
  • Page 28 ADJUSTMENT (TUNER / FRONT / DECK) < TUNER SECTION > 1. Clock Frequency Check 6. AM IF Adjustment Settings : • Test point : TP2 (CLK) Settings : • Test point : TP8 (Lch), TP9 (Rch) Method : Set to MW 1602kHz and check that the test •...
  • Page 29 < DECK SECTION > < FRONT SECTION > 6. µ-CON CLOCK Adjustment 1. Tape Speed Adjustment Settings : • Test point : TP5 (CLK), TP2 (GND) Settings : • Test tape : TTA–100 • Adjustment location : L201 • Test point : TP8 (Lch), TP9 (Rch) Method : Connect a frequency counter to TP2 and TP5.

  • Page 30: Cd Test Mode

    CD TEST MODE 1. How to Activate CD Test Mode 2. How to Cancel CD Test Mode While pressing the CD function button, insert the AC plug to Exit the CD test mode by any of the following procedures. the outlet. The message “CD TEST” appears on the •...

  • Page 31: Md Test Mode

    MD TEST MODE 1. Starting up the MD Test Mode While pressing the MD function button, insert the AC plug into the outlet. Notes: 1) Mechanism abnormalities are ignored while the test mode is starting up. If any abnormality occurs, disconnect the plug immediately. 2) During test mode operation, playback and recording are not possible.
  • Page 32 7. Checking the Loading Mechanism and OWH To check the operations of the loading mechanism and OWH, follow the procedure given below. Every time the SYNC REC (DIGITAL) CD MD NORMAL button and the MD EJECT button are pressed in the “ALL SVoFF” state, the OWH moves up and down.

  • Page 33: Electrical Adjustment

    ELECTRICAL ADJUSTMENT All the adjustments and checks of the MD block are performed in the test mode. When “No Adjust” appears on the display, follow sections 1 through 3 to adjust. 1. Temperature Compensation Adjustment Normally, do not perform the temperature compensation adjustment. If the adjustment value is extensively different, perform the adjustment as given below in a suitable environment for measuring the correct temperature near the unit.
  • Page 34 5) Press the DISPLAY once again. Confirm that the values of “f ** t##s ” are within the range shown below. (hexadecimal) f “ ** ” ..... 1A to 40 t “##” ....0C to 30 s “ ” ....0C to 30 FOCUS GAIN TRACKING GAIN SLED GAIN...
  • Page 35 5. Record/Playback Error Rate Check (MO DISC) • Test point: Check the test point on the display. • Test disk: MDW-74 1) Load the MDW-74. 2) Move the pickup to the center of the disk using the B.SKIP button and F.SKIP button. 3) Press the CD function button.
  • Page 36 MECHANICAL EXPLODED VIEW 1 / 1 P. W . B AZG-1 FF-CABLE, HT-SINK PLATE,SHLD AZG-E P. W. B P. W. B ZZM-2 CHAS,MAIN PLATE,EARTH MECHA – 36 –...

  • Page 37: Mechanical Parts List

    BUSHING, AC CORD (E) 13 8A-DBA-031-010 WINDOW,DISP EZ 38 8A-DBA-209-010 HLDR,HT-SINK 14 8A-DBA-002-010 PANEL,TRAY S 39 8A-DBA-038-010 CABI,REAR EZS<EZS> 15 87-CE3-023-010 BADGE,AIWA 30N SILV 39 8A-DBA-039-010 CABI,REAR KS<KS> 16 8A-NFA-063-010 PANEL,LEFT V-2 40 87-A91-882-010 FBEAD,FSOC250RT1 17 86-NFZ-001-010 WINDOW,TOP 41 88-906-171-110 FF-CABLE,6P 1.25...
  • Page 38 TAPE MECHANISM EXPLODED VIEW 1 / 1 TERMINAL,LB1 TERMINAL,LB1 – 38 –...

  • Page 39: Tape Mechanism Parts List

    TAPE MECHANISM PARTS LIST 1 / 1 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 1 8Z-ZM1-254-310 SPR-C,REEL R 36 8Z-ZM1-220-110 LEVER,REC SENSOR 2 8Z-ZM1-225-110 GEAR,REEL R 37 8Z-ZM1-249-210 SPR-T,FR 3 8Z-ZM1-253-210 SPR-C,AUTO SENSOR 38 8Z-ZM1-242-310 SPR-T,FF/REW 4 8Z-ZM1-217-110 LEVER,AUTO SENSOR...

  • Page 40: General Speaker Disassembly Instructions (For Reference)

    GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERENCE) Type.1 Type.4 Insert a flat-bladed screwdriver into the position indicated by the TOOLS arrows and remove the panel. Remove the screws of each speaker Plastic head hammer unit and then remove the speaker units. (() flat head screwdriver Cut chisel How to Remove the PANEL, FR...

  • Page 41: Speaker Parts List

    SPEAKER PARTS LIST <SX-NHG2 YSC, YSC9> REF. NO. PART NO. KANRI DESCRIPTION 1 8A-NSA-001-010 PANEL,FR(YSC9) 1 8A-NSL-001-010 PANEL,FR(YSC) 2 8A-NSA-003-010 GRILLE,FRAME ASSY(YSC9) 2 8A-NSL-003-010 GRILLE,FRAME ASSY(YSC) 3 8A-NSK-602-010 SPKR,W 140(YSC9) 4 8A-NSK-606-010 SPKR,T 60(YSC9) 5 87-NSH-612-010 SPKR,CERAMIC ASSY(YSC9) 6 87-NS7-611-010 CORD,SPKR 7 8A-NSL-602-010 SPKR,120(YSC)
  • Page 42 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 912204 0251431 Printed in Singapore...

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