1. Manuals
  2. Brands
  3. HHB Manuals
  4. Minidisc Recorder
  5. Portadisc MDP500
  6. Service manual

HHB PORTADISC MDP500 Service Manual

Portable minidisc recorder
Hide thumbs Also See for PORTADISC MDP500:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Quick Reference Manual
SERVICE
MANUAL

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the PORTADISC MDP500 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for HHB PORTADISC MDP500

Summary of Contents for HHB PORTADISC MDP500

  • Page 1 SERVICE MANUAL...

  • Page 3: Table Of Contents

    CONTENTS PORTADISC MDP500 MiniDisc Recorder SAFETY INFORMATION This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual.

  • Page 5: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder Removing The Top And Bottom Panels Instructions are best carried through in the following order: a) Slide off the plastic battery cover b) Remove the 4 screws (A) ~ fig.1 fig.1 c) Remove the 2 screws (B) ~ fig.2...

  • Page 6: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder d) Remove the 2 screws (C) ~ fig.3 fig.3 e) Remove the top panel. Caution: Disconnect speaker connector (D) before fully separating the top panel from the machine ~ fig.4 fig.4 Remove the bottom panel...

  • Page 7: Removing The Front Panel

    DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder Removing The Front Panel a) Remove the dual concentric record level knob (A) by pushing through from behind the front panel ~ fig.5 b) Remove the phone level knob (B)~ fig.5 fig.5 c) Remove 2 screws (C) ~ fig.6...
  • Page 8 DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder d) Remove 2 screws (D) ~ fig.7 fig.7 e) Lift tab (F) ~ fig.6, then remove the front panel. Caution: Disconnect ribbon cable (1) before fully separating the front panel from the machine ~ fig.8...

  • Page 9: Removing The Main Cpu Circuit Board

    DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder Removing The Main CPU Circuit Board a) Remove 4 screws (A) ~ fig.9 b) Remove the SPDIF optical protector plugs if connected c) Lift up the CPU board carefully as the board is still attached by several cables fig.9...

  • Page 10: Removng The Md Mechanism

    DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder Removing The MD Mechanism a) Remove 4 screws (A) ~ fig.11 fig.11 b) Ensure cables (3) and (4) are disconnected ~ fig.10 c) Lift out the MD mechanism...

  • Page 11: Removing The Analog Main & Sub Circuit Boards

    DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder Removing The Analog Main & Sub Circuit Boards a) Remove 4 screws (A) ~ fig.12 fig.12 b) Disconnect the XLR input cables, (9) and (10) ~ fig.13 c) Remove the Analog Sub pcb d) Remove 2 screws (B) to remove the metal shield plate ~ fig.12 e) Remove the Record Level Pot locking nut and washer (C) ~ fig.13...
  • Page 12 DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder fig.13 h) Remove 5 screws (E) ~ fig.14 Remove the connector side panel (F) ~ fig.14 Lift out the Analog Main pcb. fig.14...

  • Page 13: Block Diagram

    BLOCK DIAGRAM PORTADISC MDP500 MiniDisc Recorder...

  • Page 14: Cpu

    PORTADISC MDP500 MiniDisc Recorder...

  • Page 15: Power Supply Cpu Board

    POWER SUPPLY CPU BOARD PORTADISC MDP500 MiniDisc Recorder...

  • Page 16: Analog Inputs

    ANALOG INPUTS PORTADISC MDP500 MiniDisc Recorder...

  • Page 17: Analog Output & Digital Coax I/O

    ANALOG OUTPUT & DIGITAL COAX I/O PORTADISC MDP500 MiniDisc Recorder...

  • Page 18: Cpu Pcb Component Side

    CPU PCB COMPONENT SIDE PORTADISC MDP500 MiniDisc Recorder...

  • Page 19: Cpu Pcb Solder Side

    CPU PCB SOLDER SIDE PORTADISC MDP500 MiniDisc Recorder...

  • Page 20: Analog Main Solder Side

    ANALOG MAIN SOLDER SIDE PORTADISC MDP500 MiniDisc Recorder...

  • Page 21: Analog Main Component Side

    ANALOG MAIN COMPONENT SIDE PORTADISC MDP500 MiniDisc Recorder...

  • Page 22: Analog Sub Pcb Solder Side

    ANALOG SUB PCB SOLDER SIDE PORTADISC MDP500 MiniDisc Recorder...

  • Page 23: Analog Sub Pcb Component Side

    ANALOG SUB PCB COMPONENT SIDE PORTADISC MDP500 MiniDisc Recorder...
  • Page 24 FRONT PANEL PARTS & SOLDER SIDE PORTADISC MDP500 MiniDisc Recorder...

  • Page 25: Deck Panel Pcb

    DECK PANEL PCB PORTADISC MDP500 MiniDisc Recorder...

  • Page 27: Reset Information

    RESET INFORMATION PORTADISC MDP500 MiniDisc Recorder There are 4 types of reset function which may be used to eliminate abnormal behaviour in the Portadisc. If having implemented all the 4 reset types, and the MDP500 has not returned to normal behaviour, then investigate the possibility of a fault or misalignment in the machine.

  • Page 29: Test Mode & Alignment

    TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder Entering Test Mode There are two test modes. 1) Switch Test Mode 2) Mechanism Alignment Test Mode When ejecting a disc, always ensure that the disc has stopped rotating by pressing STOP . In addition, please be aware that the record protection tab on a mini-disc is not detected in test mode, therefore it is possible to overwrite recorded material.

  • Page 30: Tools For Alignment

    TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder Tools For Alignment Oscilloscope; MD-LPM1 laser power meter; voltmeter; Sony test disc TDYS-1; Continuously recorded disc (see end of this section for details on how to create one of these discs). Button Operation During Alignment Test Mode...

  • Page 31: Test Mode Displays

    TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder Test Mode Diisplays The display button is used to toggle through the following display pages: a) Alignment Mode b) Error rate display c) Address display d) Auto gain display e) IVR display The Auto gain and IVR displays are not used during servicing.

  • Page 32: Laser Power Adjustment

    TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder Laser Power Adjustment This adjustment requires the use of a laser power meter. It is highly recommended that the SONY MD-LPM1 Mini-disc Laser Power Meter (Part No. 9-948-310-40) is used for this adjustment as it allows for more accurate and reliable adjustment.

  • Page 33: Focus Bias Adjustment

    TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder b) Load a recordable 74 mini-disc into the machine and use the << or >> buttons to move the optical lens to about the middle of the disc. c) Use the AMS buttons to locate the EFBAL ADJUST page, then press F1 to display 'EFBAL MO-R'.

  • Page 34: Error Rate Confirmation

    TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder h) Use the backward AMS button to adjust for a focus bias value which produces an average C1 error rate of 220. Press the F1 button to save and to display 'XXXX/XX c=XX'.

  • Page 35: Creating A Continuously Recorded Test Disc

    TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder Creating A Continuously Recorded Test Disc A continuously recorded disc should only be created using a well-aligned machine. This disc is required for performing focus and error rate checks and adjustments. 1. Insert a fresh blank disc.

  • Page 37: Ic Information

    IC INFORMATION PORTADISC MDP500 MiniDisc Recorder AK4520A 20Bit ADC/DAC 74HC4052 Analogue Multiplexer/Demultiplexer Function Table CONTROL INPUT COMMON OUTPUTS IH = Inhibit, When IH is low, outputs are ON.
  • Page 38 IC INFORMATION PORTADISC MDP500 MiniDisc Recorder 74HC4066 CMOS Quad Bilateral Switch BA3308F ALC NJM2360...

  • Page 39: Parts List

    PARTS LIST PORTADISC MDP500 MiniDisc Recorder Main Frame Part Name Part Code Part Name Part Code Front Panel (ABS) 40-031-01 1/44 Screw top / bott rear - black 4 off CS M2.6x6 Battery housing (ABS) 43-055-01 1/45 Screw battery case...

  • Page 40: Cpu Unit

    PARTS LIST PORTADISC MDP500 MiniDisc Recorder Main Frame (continued) Part Name Part Code Part Name Part Code 2/33 CN12 (4-way conn) Z-282-04FD 1/87 Cable CN101-battery 08-049-04a 2/34 CN101 - 104 (2-pin conn) 53253-0210 1/88 CN104-C0 (capacitor) 08-049-04b 2/35 Slide charge switch (SW100) SS324F-B12H6.5...

  • Page 41: Analog Main Unit

    PARTS LIST PORTADISC MDP500 MiniDisc Recorder Analog Main Unit Analog Sub Unit Part Name Part Code Part Name Part Code ANALOG SUB PCB 01-125-04 ANALOG MAIN PCB 01-124-03 IC200 NJM2110M IC209, 210 NJM2068M IC201, 203, 216 NJM2122M IC211, 212 NJM2121M...

  • Page 43: Top Panel

    TOP PANEL PORTADISC MDP500 MiniDisc Recorder BATTERY COMPARTMENT REWIND This cover slides off (from right to left in this Rewinds the track during playback. view) and underneath is the battery caddy, holding 8 x AA batteries. PLAY Use this button to start playing back the track.

  • Page 44: Front Panel

    FRONT PANEL PORTADISC MDP500 MiniDisc Recorder PHONE LEVEL REC LEVEL Adjusts the volume level for the headphones and Adjusts the analog recording level manually for mic monitor speaker. The control will pop out if you and line inputs. This control does not affect the press it.

  • Page 45: Side Panels

    SIDE PANELS PORTADISC MDP500 MiniDisc Recorder PHONES SOCKET USB CONNECTOR 1/4" jack socket for headphone connection. USB interface port for a compatible computer. LINE OUT LEFT AND RIGHT CONNECTORS OPTICAL I/O CONNECTORS (Unbalanced RCA phono.) To send analog output (TOSlink.) SPDIF digital optical connectors.

  • Page 46: Lcd Display

    LCD DISPLAY PORTADISC MDP500 MiniDisc Recorder 42-3 LEVEL INDICATOR DISPLAY MODE INDICATOR The bar meter shows the audio level in playback Displays the track number, record/play time, and record. (42) left hand channel (43) right remaining time, total recorded time, level hand channel.

  • Page 47: Technical Data

    Phantom power (mic inputs) ....+48V, 7mA HHB MD80 MiniDisc, operating instructions, quick reference guide NOTE: The specifications and design of this product are subject to change without notice, due to improvements.
  • Page 48 HHB Communications USA LLC · 1410 Centinela Avenue, Los Angeles, CA 90025-2501, USA Tel: 310 319 1111 · Fax: 310 319 1311 · E-Mail: sales@hhbusa.com HHB Communications Canada Ltd · 260 King Street East, Toronto, Ontario M5A 4L5, Canada Tel: 416 867 9000 · Fax: 416 867 1080 · E-Mail: sales@hhbcanada.com...

Table of Contents