HHB Portadisc MDP500 User manual

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HHB Communications Ltd · 73-75 Scrubs Lane, London NW10 6QU, UK
Tel: [phone] · Fax: [phone] · E-Mail: [email protected]
HHB Communications USA LLC · 1410 Centinela Avenue, Los Angeles, CA 90025-2501, USA
Tel: [phone] · Fax: [phone] · E-Mail: [email protected]
HHB Communications Canada Ltd · 260 King Street East, Toronto, Ontario M5A 4L5, Canada
Tel: [phone] · Fax: [phone] · E-Mail: [email protected]
SERVICE
MANUAL
HHB MDP500 PORTABLE MINIDISC RECORDER

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. If
you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and
refer the repair to a qualified service technician.
This appliance is classified as a CLASS 1 LASER product, the CLASS 1 LASER product marking is on the rear of the
unit inside the battery compartment.
This equipment fully complies with 21 CFR 1040.10 and 1040.11
CAUTION: Invisible laser radiation when the unit is disassembled, avoid exposure to beam.
3
2
CONTENTS
PORTADISC MDP500 MiniDisc Recorder
SAFETY INFORMATION
1. DISASSEMBLY INSTRUCTIONS . . . . . . . . 5-12
Removing The Top & Bottom Panels . . . . . . . . . . 5-6
Removing The Front Panel . . . . . . . . . . . . . . . . . 7-8
Removing The Main CPU Circuit Board . . . . . . . . . . 9
Removng The MD Mechanism . . . . . . . . . . . . . . 10
Removing The Analog Main & Sub Circuit Boards 11-12
2. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . 13
3. CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . 15-21
CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Supply CPU Board . . . . . . . . . . . . . . . . . . 17
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Analog Output & Digital Coax I/O . . . . . . . . . . . . . 21
4. PCB LAYOUTS . . . . . . . . . . . . . . . . . . . . 24-33
CPU PCB Component Side . . . . . . . . . . . . . . . . . 24
CPU PCB Solder Side . . . . . . . . . . . . . . . . . . . . . 25
Analog Main Solder Side . . . . . . . . . . . . . . . . . . 28
Analog Main Component Side . . . . . . . . . . . . . . . 29
Analog Sub PCB Solder Side . . . . . . . . . . . . . . . . 32
Analog Sub PCB Component Side . . . . . . . . . . . . 33
Front Panel PCB Parts Side . . . . . . . . . . . . . . . . 35
Front Panel PCB Solder Side . . . . . . . . . . . . . . . . 35
Deck Panel PCB . . . . . . . . . . . . . . . . . . . . . . . . 37
5. RESET INFORMATION . . . . . . . . . . . . . . . . . 39
6. TEST MODE & ALIGNMENT . . . . . . . . . . 41-47
Entering Test Mode . . . . . . . . . . . . . . . . . . . . . . 41
Switch Test Mode . . . . . . . . . . . . . . . . . . . . . . . 41
Mechanism Alignment Test Mode . . . . . . . . . . . . 41
Tools For Alignment . . . . . . . . . . . . . . . . . . . . . . 42
Button Operation During Alignment Test Mode . . . 42
The Alignment Modes . . . . . . . . . . . . . . . . . . . . 42
Test Mode Displays . . . . . . . . . . . . . . . . . . . . . . 43
Temperature Compensation Offset Adjustment . . . 43
Laser Power Adjustment . . . . . . . . . . . . . . . . . . 44
Traverse Adjustment . . . . . . . . . . . . . . . . . . . 44-45
Focus Bias Adjustment . . . . . . . . . . . . . . . . . 45-46
Error Rate Confirmation . . . . . . . . . . . . . . . . . . . 46
Creating A Continuously Recorded Test Disc . . . . . 47
7. IC INFORMATION . . . . . . . . . . . . . . . . . . 49-50
8. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . 51-53
Main Frame . . . . . . . . . . . . . . . . . . . . . . . . 51-52
CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Analog Main Unit . . . . . . . . . . . . . . . . . . . . . . . 53
Analog Sub Unit . . . . . . . . . . . . . . . . . . . . . . . . 53
9. IDENTIFICATION OF PARTS . . . . . . . . . . . 55-58
Top Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . 59
CONTENTS

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. If
you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and
refer the repair to a qualified service technician.
This appliance is classified as a CLASS 1 LASER product, the CLASS 1 LASER product marking is on the rear of the
unit inside the battery compartment.
This equipment fully complies with 21 CFR 1040.10 and 1040.11
CAUTION: Invisible laser radiation when the unit is disassembled, avoid exposure to beam.
3
2
CONTENTS
PORTADISC MDP500 MiniDisc Recorder
SAFETY INFORMATION
1. DISASSEMBLY INSTRUCTIONS . . . . . . . . 5-12
Removing The Top & Bottom Panels . . . . . . . . . . 5-6
Removing The Front Panel . . . . . . . . . . . . . . . . . 7-8
Removing The Main CPU Circuit Board . . . . . . . . . . 9
Removng The MD Mechanism . . . . . . . . . . . . . . 10
Removing The Analog Main & Sub Circuit Boards 11-12
2. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . 13
3. CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . 15-21
CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Supply CPU Board . . . . . . . . . . . . . . . . . . 17
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Analog Output & Digital Coax I/O . . . . . . . . . . . . . 21
4. PCB LAYOUTS . . . . . . . . . . . . . . . . . . . . 24-33
CPU PCB Component Side . . . . . . . . . . . . . . . . . 24
CPU PCB Solder Side . . . . . . . . . . . . . . . . . . . . . 25
Analog Main Solder Side . . . . . . . . . . . . . . . . . . 28
Analog Main Component Side . . . . . . . . . . . . . . . 29
Analog Sub PCB Solder Side . . . . . . . . . . . . . . . . 32
Analog Sub PCB Component Side . . . . . . . . . . . . 33
Front Panel PCB Parts Side . . . . . . . . . . . . . . . . 35
Front Panel PCB Solder Side . . . . . . . . . . . . . . . . 35
Deck Panel PCB . . . . . . . . . . . . . . . . . . . . . . . . 37
5. RESET INFORMATION . . . . . . . . . . . . . . . . . 39
6. TEST MODE & ALIGNMENT . . . . . . . . . . 41-47
Entering Test Mode . . . . . . . . . . . . . . . . . . . . . . 41
Switch Test Mode . . . . . . . . . . . . . . . . . . . . . . . 41
Mechanism Alignment Test Mode . . . . . . . . . . . . 41
Tools For Alignment . . . . . . . . . . . . . . . . . . . . . . 42
Button Operation During Alignment Test Mode . . . 42
The Alignment Modes . . . . . . . . . . . . . . . . . . . . 42
Test Mode Displays . . . . . . . . . . . . . . . . . . . . . . 43
Temperature Compensation Offset Adjustment . . . 43
Laser Power Adjustment . . . . . . . . . . . . . . . . . . 44
Traverse Adjustment . . . . . . . . . . . . . . . . . . . 44-45
Focus Bias Adjustment . . . . . . . . . . . . . . . . . 45-46
Error Rate Confirmation . . . . . . . . . . . . . . . . . . . 46
Creating A Continuously Recorded Test Disc . . . . . 47
7. IC INFORMATION . . . . . . . . . . . . . . . . . . 49-50
8. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . 51-53
Main Frame . . . . . . . . . . . . . . . . . . . . . . . . 51-52
CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Analog Main Unit . . . . . . . . . . . . . . . . . . . . . . . 53
Analog Sub Unit . . . . . . . . . . . . . . . . . . . . . . . . 53
9. IDENTIFICATION OF PARTS . . . . . . . . . . . 55-58
Top Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . 59
CONTENTS

54
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
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.2
Removing The Top And Bottom Panels

54
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
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.2
Removing The Top And Bottom Panels

DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
7
6
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
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
fig.6
Removing The Front Panel
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
f) Remove the bottom panel

DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
7
6
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
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
fig.6
Removing The Front Panel
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
f) Remove the bottom panel

DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
9
8
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
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
d) Disconnect 8 cables (1 - 8) and remove the board ~ fig.10
fig.10
Removing The Main CPU Circuit Board
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
fig.8

DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
9
8
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
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
d) Disconnect 8 cables (1 - 8) and remove the board ~ fig.10
fig.10
Removing The Main CPU Circuit Board
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
fig.8

DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
1110
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
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
f) Disconnect cable, (11) ~ fig.13
g) Remove 3 screws (D) ~ fig.13
Removing The Analog Main & Sub Circuit Boards
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
Removing The MD Mechanism

DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
1110
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder
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
f) Disconnect cable, (11) ~ fig.13
g) Remove 3 screws (D) ~ fig.13
Removing The Analog Main & Sub Circuit Boards
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
Removing The MD Mechanism

12
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.14
DISASSEMBLY INSTRUCTIONS
PORTADISC MDP500 MiniDisc Recorder

13
BLOCK DIAGRAM
PORTADISC MDP500 MiniDisc Recorder

15
CPU
PORTADISC MDP500 MiniDisc Recorder

17
POWER SUPPLY CPU BOARD
PORTADISC MDP500 MiniDisc Recorder

19
ANALOG INPUTS
PORTADISC MDP500 MiniDisc Recorder

21
ANALOG OUTPUT & DIGITAL COAX I/O
PORTADISC MDP500 MiniDisc Recorder

24
CPU PCB COMPONENT SIDE
PORTADISC MDP500 MiniDisc Recorder

25
CPU PCB SOLDER SIDE
PORTADISC MDP500 MiniDisc Recorder

28
ANALOG MAIN SOLDER SIDE
PORTADISC MDP500 MiniDisc Recorder