Visit HHB online at www.hhb.co.uk HHB Communications Ltd · 73-75 Scrubs Lane, London NW10 6QU, UK Tel: 020 8962 5000 · Fax: 020 8962 5050 · E-Mail: sales@hhb.co.uk 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.
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. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
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. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
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 fig.
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 fig.
DISASSEMBLY INSTRUCTIONS DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder PORTADISC MDP500 MiniDisc Recorder Removing The Front Panel d) Remove the 2 screws (C) ~ fig.3 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.3 e) Remove the top panel. Caution: Disconnect speaker connector (D) before fully separating the top panel from the machine ~ fig.4 fig.
DISASSEMBLY INSTRUCTIONS DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder PORTADISC MDP500 MiniDisc Recorder Removing The Front Panel d) Remove the 2 screws (C) ~ fig.3 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.3 e) Remove the top panel. Caution: Disconnect speaker connector (D) before fully separating the top panel from the machine ~ fig.4 fig.
DISASSEMBLY INSTRUCTIONS DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder PORTADISC MDP500 MiniDisc Recorder Removing The Main CPU Circuit Board d) Remove 2 screws (D) ~ fig.7 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 fig.7 e) Lift tab (F) ~ fig.6, then remove the front panel.
DISASSEMBLY INSTRUCTIONS DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder PORTADISC MDP500 MiniDisc Recorder Removing The Main CPU Circuit Board d) Remove 2 screws (D) ~ fig.7 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 fig.7 e) Lift tab (F) ~ fig.6, then remove the front panel.
DISASSEMBLY INSTRUCTIONS DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder PORTADISC MDP500 MiniDisc Recorder Removing The MD Mechanism a) Removing The Analog Main & Sub Circuit Boards Remove 4 screws (A) ~ fig.11 a) Remove 4 screws (A) ~ fig.12 fig.11 b) Ensure cables (3) and (4) are disconnected ~ fig.10 c) Lift out the MD mechanism fig.12 10 b) Disconnect the XLR input cables, (9) and (10) ~ fig.
DISASSEMBLY INSTRUCTIONS DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder PORTADISC MDP500 MiniDisc Recorder Removing The MD Mechanism a) Removing The Analog Main & Sub Circuit Boards Remove 4 screws (A) ~ fig.11 a) Remove 4 screws (A) ~ fig.12 fig.11 b) Ensure cables (3) and (4) are disconnected ~ fig.10 c) Lift out the MD mechanism fig.12 10 b) Disconnect the XLR input cables, (9) and (10) ~ fig.
DISASSEMBLY INSTRUCTIONS PORTADISC MDP500 MiniDisc Recorder fig.13 h) Remove 5 screws (E) ~ fig.14 i) Remove the connector side panel (F) ~ fig.14 j) Lift out the Analog Main pcb. fig.
BLOCK DIAGRAM PORTADISC MDP500 MiniDisc Recorder 13
CPU PORTADISC MDP500 MiniDisc Recorder 15
POWER SUPPLY CPU BOARD PORTADISC MDP500 MiniDisc Recorder 17
ANALOG INPUTS PORTADISC MDP500 MiniDisc Recorder 19
ANALOG OUTPUT & DIGITAL COAX I/O PORTADISC MDP500 MiniDisc Recorder 21
CPU PCB COMPONENT SIDE PORTADISC MDP500 MiniDisc Recorder 24
CPU PCB SOLDER SIDE PORTADISC MDP500 MiniDisc Recorder 25
ANALOG MAIN SOLDER SIDE PORTADISC MDP500 MiniDisc Recorder 28
ANALOG MAIN COMPONENT SIDE PORTADISC MDP500 MiniDisc Recorder 29
ANALOG SUB PCB SOLDER SIDE PORTADISC MDP500 MiniDisc Recorder 32
ANALOG SUB PCB COMPONENT SIDE PORTADISC MDP500 MiniDisc Recorder 33
FRONT PANEL PARTS & SOLDER SIDE PORTADISC MDP500 MiniDisc Recorder 35
DECK PANEL PCB PORTADISC MDP500 MiniDisc Recorder 37
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. The four reset types are listed below: 1) F1 +F2 reset. Resets factory defaults 2) F1 +F3 reset. Resets factory defaults, user set-ups, clock 3) Power reset.
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. The four reset types are listed below: 1) F1 +F2 reset. Resets factory defaults 2) F1 +F3 reset. Resets factory defaults, user set-ups, clock 3) Power reset.
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. Switch Test Mode Hold down the F1 and Display buttons whilst simultaneously pressing the power switch.
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. Switch Test Mode Hold down the F1 and Display buttons whilst simultaneously pressing the power switch.
TEST MODE & 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).
TEST MODE & 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).
TEST MODE & ALIGNMENT TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder 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. This meter is built in to a minidisc case so that the meter can be loaded using the MD loading mechanism.
TEST MODE & ALIGNMENT TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder 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. This meter is built in to a minidisc case so that the meter can be loaded using the MD loading mechanism.
TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder Creating A Continuously Recorded Test Disc h) Use the backward AMS button to adjust for a focus bias value which produces an average C1 error rate of 220. i) Press the F1 button to save and to display 'XXXX/XX c=XX'. j) Check that the C1 error rate is less than 50 and ADER is less than 2. k) Press the F1 button to save and to display 'XX-XX-XX (XX)'.
TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder TEST MODE & ALIGNMENT PORTADISC MDP500 MiniDisc Recorder Creating A Continuously Recorded Test Disc h) Use the backward AMS button to adjust for a focus bias value which produces an average C1 error rate of 220. i) Press the F1 button to save and to display 'XXXX/XX c=XX'. j) Check that the C1 error rate is less than 50 and ADER is less than 2. k) Press the F1 button to save and to display 'XX-XX-XX (XX)'.
IC INFORMATION PORTADISC MDP500 MiniDisc Recorder AK4520A 20Bit ADC/DAC 74HC4052 Analogue Multiplexer/Demultiplexer Function Table CONTROL INPUT B A 0 0 1 1 COMMON OUTPUTS X Y 0 1 0 1 X0 X1 X2 X3 Y0 Y1 Y2 Y3 IH = Inhibit, When IH is low, outputs are ON.
IC INFORMATION PORTADISC MDP500 MiniDisc Recorder AK4520A 20Bit ADC/DAC 74HC4052 Analogue Multiplexer/Demultiplexer Function Table CONTROL INPUT B A 0 0 1 1 COMMON OUTPUTS X Y 0 1 0 1 X0 X1 X2 X3 Y0 Y1 Y2 Y3 IH = Inhibit, When IH is low, outputs are ON.
IC INFORMATION PARTS LIST PORTADISC MDP500 MiniDisc Recorder 74HC4066 CMOS Quad Bilateral Switch BA3308F ALC NJM2360 50 PORTADISC MDP500 MiniDisc Recorder Main Frame No. Part Name Part Code No. Part Name Part Code 1/1 Front Panel (ABS) 40-031-01 1/44 Screw top / bott rear - black 4 off CS M2.
IC INFORMATION PARTS LIST PORTADISC MDP500 MiniDisc Recorder 74HC4066 CMOS Quad Bilateral Switch BA3308F ALC NJM2360 50 PORTADISC MDP500 MiniDisc Recorder Main Frame No. Part Name Part Code No. Part Name Part Code 1/1 Front Panel (ABS) 40-031-01 1/44 Screw top / bott rear - black 4 off CS M2.
PARTS LIST PARTS LIST PORTADISC MDP500 MiniDisc Recorder Main Frame (continued) PORTADISC MDP500 MiniDisc Recorder Analog Main Unit Analog Sub Unit Part Code No. Part Name Part Code No. Part Name CN12 (4-way conn) Z-282-04FD 3/1 ANALOG MAIN PCB 01-124-03 4/1 ANALOG SUB PCB 01-125-04 CN101 - 104 (2-pin conn) 53253-0210 3/2 IC209, 210 NJM2068M 4/2 IC200 NJM2110M 3/3 IC211, 212 NJM2121M 4/3 IC201, 203, 216 NJM2122M IC202, 204, 207, 208 TC74HC4052F No.
PARTS LIST PARTS LIST PORTADISC MDP500 MiniDisc Recorder Main Frame (continued) PORTADISC MDP500 MiniDisc Recorder Analog Main Unit Analog Sub Unit Part Code No. Part Name Part Code No. Part Name CN12 (4-way conn) Z-282-04FD 3/1 ANALOG MAIN PCB 01-124-03 4/1 ANALOG SUB PCB 01-125-04 CN101 - 104 (2-pin conn) 53253-0210 3/2 IC209, 210 NJM2068M 4/2 IC200 NJM2110M 3/3 IC211, 212 NJM2121M 4/3 IC201, 203, 216 NJM2122M IC202, 204, 207, 208 TC74HC4052F No.
TOP PANEL PORTADISC MDP500 MiniDisc Recorder 2 3 4 5 BATTERY COMPARTMENT This cover slides off (from right to left in this view) and underneath is the battery caddy, holding 8 x AA batteries. KEYHOLD Use this button to avoid any accidental operation during recording. Each time you press the button for more than two seconds, the hold function changes from ‘Key Hold ON’ to ‘Key Hold OFF’ and vice versa.
TOP PANEL PORTADISC MDP500 MiniDisc Recorder 2 3 4 5 BATTERY COMPARTMENT This cover slides off (from right to left in this view) and underneath is the battery caddy, holding 8 x AA batteries. KEYHOLD Use this button to avoid any accidental operation during recording. Each time you press the button for more than two seconds, the hold function changes from ‘Key Hold ON’ to ‘Key Hold OFF’ and vice versa.
FRONT PANEL SIDE PANELS PORTADISC MDP500 MiniDisc Recorder 14 PHONE LEVEL Adjusts the volume level for the headphones and monitor speaker. The control will pop out if you press it. The monitor speaker will not function during recording or when the headphones are connected.
FRONT PANEL SIDE PANELS PORTADISC MDP500 MiniDisc Recorder 14 PHONE LEVEL Adjusts the volume level for the headphones and monitor speaker. The control will pop out if you press it. The monitor speaker will not function during recording or when the headphones are connected.
LCD DISPLAY TECHNICAL DATA PORTADISC MDP500 MiniDisc Recorder PORTADISC MDP500 MiniDisc Recorder GENERAL Unbalanced line output Format . . . . . . . . . . . . . . . . . . . MiniDisc digital audio system Connector type . . . . . . . . . . . . . . . . . . . . . . . . . RCA phono Disc Output level . . . . . . . . . . . . . . . . +8dBu @ 0dBFS into >10k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MiniDisc Recording method . . . . . . . .
LCD DISPLAY TECHNICAL DATA PORTADISC MDP500 MiniDisc Recorder PORTADISC MDP500 MiniDisc Recorder GENERAL Unbalanced line output Format . . . . . . . . . . . . . . . . . . . MiniDisc digital audio system Connector type . . . . . . . . . . . . . . . . . . . . . . . . . RCA phono Disc Output level . . . . . . . . . . . . . . . . +8dBu @ 0dBFS into >10k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MiniDisc Recording method . . . . . . . .
Visit HHB online at www.hhb.co.uk HHB Communications Ltd · 73-75 Scrubs Lane, London NW10 6QU, UK Tel: 020 8962 5000 · Fax: 020 8962 5050 · E-Mail: sales@hhb.co.uk 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.
