HHB-MDP500-md-sm 维修电路原理图.pdf

《HHB-MDP500-md-sm 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《HHB-MDP500-md-sm 维修电路原理图.pdf（48页珍藏版）》请在收音机爱好者资料库上搜索。

1、Visit HHB online at www.hhb.co.ukHHB Communications Ltd 73-75 Scrubs Lane, London NW10 6QU, UKTel: 020 8962 5000 Fax: 020 8962 5050 E-Mail: saleshhb.co.ukHHB Communications USA LLC 1410 Centinela Avenue, Los Angeles, CA 90025-2501, USATel: 310 319 1111 Fax: 310 319 1311 E-Mail: HHB Communications Ca

2、nada Ltd 260 King Street East, Toronto, Ontario M5A 4L5, Canada Tel: 416 867 9000 Fax: 416 867 1080 E-Mail: SERVICEMANUALHHB MDP500 PORTABLE MINIDISC RECORDERRadioFans.CN 收音机爱 好者资料库This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qua

3、lifiedtechnicians have the necessary test equipment and tools, and have been trained to properly and safely repair complexproducts 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. Ifyou are not

4、 qualified to perform the repair of this product properly and safely, you should not risk trying to do so andrefer 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 theunit inside the battery com

5、partment.This equipment fully complies with 21 CFR 1040.10 and 1040.11CAUTION: Invisible laser radiation when the unit is disassembled, avoid exposure to beam.32CONTENTSPORTADISC MDP500 MiniDisc RecorderSAFETY INFORMATION1. DISASSEMBLY INSTRUCTIONS . . . . . . . . 5-12Removing The Top & Bottom Panel

6、s . . . . . . . . . . 5-6Removing The Front Panel . . . . . . . . . . . . . . . . . 7-8Removing The Main CPU Circuit Board . . . . . . . . . . 9Removng The MD Mechanism . . . . . . . . . . . . . . 10Removing The Analog Main & Sub Circuit Boards 11-122. BLOCK DIAGRAM . . . . . . . . . . . . . . . . .

7、 . . . 133. CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . 15-21CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Power Supply CPU Board . . . . . . . . . . . . . . . . . . 17Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 19Analog Output & Digital Coax I/O .

8、. . . . . . . . . . . . 214. PCB LAYOUTS . . . . . . . . . . . . . . . . . . . . 24-33CPU PCB Component Side . . . . . . . . . . . . . . . . . 24CPU PCB Solder Side . . . . . . . . . . . . . . . . . . . . . 25Analog Main Solder Side . . . . . . . . . . . . . . . . . . 28Analog Main Component Side .

9、. . . . . . . . . . . . . . 29Analog Sub PCB Solder Side . . . . . . . . . . . . . . . . 32Analog Sub PCB Component Side . . . . . . . . . . . . 33Front Panel PCB Parts Side . . . . . . . . . . . . . . . . 35Front Panel PCB Solder Side . . . . . . . . . . . . . . . . 35Deck Panel PCB . . . . . . . .

10、 . . . . . . . . . . . . . . . . 375. RESET INFORMATION . . . . . . . . . . . . . . . . . 396. TEST MODE & ALIGNMENT . . . . . . . . . . 41-47Entering Test Mode . . . . . . . . . . . . . . . . . . . . . . 41Switch Test Mode . . . . . . . . . . . . . . . . . . . . . . . 41Mechanism Alignment Test Mod

11、e . . . . . . . . . . . . 41Tools For Alignment . . . . . . . . . . . . . . . . . . . . . . 42Button Operation During Alignment Test Mode . . . 42The Alignment Modes . . . . . . . . . . . . . . . . . . . . 42Test Mode Displays . . . . . . . . . . . . . . . . . . . . . . 43Temperature Compensation Of

12、fset Adjustment . . . 43Laser Power Adjustment . . . . . . . . . . . . . . . . . . 44Traverse Adjustment . . . . . . . . . . . . . . . . . . . 44-45Focus Bias Adjustment . . . . . . . . . . . . . . . . . 45-46Error Rate Confirmation . . . . . . . . . . . . . . . . . . . 46Creating A Continuously Rec

13、orded Test Disc . . . . . 477. IC INFORMATION . . . . . . . . . . . . . . . . . . 49-508. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . 51-53Main Frame . . . . . . . . . . . . . . . . . . . . . . . . 51-52CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Analog Main Unit

14、. . . . . . . . . . . . . . . . . . . . . . . 53Analog Sub Unit . . . . . . . . . . . . . . . . . . . . . . . . 539. IDENTIFICATION OF PARTS . . . . . . . . . . . 55-58Top Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Front Panel . . . . . . . . . . . . . . . . . . . . . . . . .

15、. . 56Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . 57LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5810. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . 59CONTENTSRadioFans.CN 收音机爱 好者资料库This service manual is intended for qualified service technicians;

16、 it is not meant for the casual do-it-yourselfer. Qualifiedtechnicians have the necessary test equipment and tools, and have been trained to properly and safely repair complexproducts such as those covered by this manual.Improperly performed repairs can adversely affect the safety and reliability of

17、 the product and may void the warranty. Ifyou are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so andrefer the repair to a qualified service technician. This appliance is classified as a CLASS 1 LASER product, the CLASS 1 LASER product mar

18、king is on the rear of theunit inside the battery compartment.This equipment fully complies with 21 CFR 1040.10 and 1040.11CAUTION: Invisible laser radiation when the unit is disassembled, avoid exposure to beam.32CONTENTSPORTADISC MDP500 MiniDisc RecorderSAFETY INFORMATION1. DISASSEMBLY INSTRUCTION

19、S . . . . . . . . 5-12Removing The Top & Bottom Panels . . . . . . . . . . 5-6Removing The Front Panel . . . . . . . . . . . . . . . . . 7-8Removing The Main CPU Circuit Board . . . . . . . . . . 9Removng The MD Mechanism . . . . . . . . . . . . . . 10Removing The Analog Main & Sub Circuit Boards 11

20、-122. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . 133. CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . 15-21CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Power Supply CPU Board . . . . . . . . . . . . . . . . . . 17Analog Inputs . . . . . . . . . . . . . . . . . .

21、. . . . . . . . 19Analog Output & Digital Coax I/O . . . . . . . . . . . . . 214. PCB LAYOUTS . . . . . . . . . . . . . . . . . . . . 24-33CPU PCB Component Side . . . . . . . . . . . . . . . . . 24CPU PCB Solder Side . . . . . . . . . . . . . . . . . . . . . 25Analog Main Solder Side . . . . . . .

22、. . . . . . . . . . . 28Analog Main Component Side . . . . . . . . . . . . . . . 29Analog Sub PCB Solder Side . . . . . . . . . . . . . . . . 32Analog Sub PCB Component Side . . . . . . . . . . . . 33Front Panel PCB Parts Side . . . . . . . . . . . . . . . . 35Front Panel PCB Solder Side . . . . . .

23、 . . . . . . . . . . 35Deck Panel PCB . . . . . . . . . . . . . . . . . . . . . . . . 375. RESET INFORMATION . . . . . . . . . . . . . . . . . 396. TEST MODE & ALIGNMENT . . . . . . . . . . 41-47Entering Test Mode . . . . . . . . . . . . . . . . . . . . . . 41Switch Test Mode . . . . . . . . . . . .

24、 . . . . . . . . . . . 41Mechanism Alignment Test Mode . . . . . . . . . . . . 41Tools For Alignment . . . . . . . . . . . . . . . . . . . . . . 42Button Operation During Alignment Test Mode . . . 42The Alignment Modes . . . . . . . . . . . . . . . . . . . . 42Test Mode Displays . . . . . . . . . .

25、. . . . . . . . . . . . 43Temperature Compensation Offset Adjustment . . . 43Laser Power Adjustment . . . . . . . . . . . . . . . . . . 44Traverse Adjustment . . . . . . . . . . . . . . . . . . . 44-45Focus Bias Adjustment . . . . . . . . . . . . . . . . . 45-46Error Rate Confirmation . . . . . . .

26、. . . . . . . . . . . . 46Creating A Continuously Recorded Test Disc . . . . . 477. IC INFORMATION . . . . . . . . . . . . . . . . . . 49-508. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . 51-53Main Frame . . . . . . . . . . . . . . . . . . . . . . . . 51-52CPU Unit . . . . . . . . . . . .

27、. . . . . . . . . . . . . . . . . 52Analog Main Unit . . . . . . . . . . . . . . . . . . . . . . . 53Analog Sub Unit . . . . . . . . . . . . . . . . . . . . . . . . 539. IDENTIFICATION OF PARTS . . . . . . . . . . . 55-58Top Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Front Pan

28、el . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . 57LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5810. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . 59CONTENTS54DISASSEMBLY INSTRUCTIONSPORTADISC

29、MDP500 MiniDisc RecorderInstructions are best carried through in the following order:a)Slide off the plastic battery coverb)Remove the 4 screws (A) fig.1fig.1c)Remove the 2 screws (B) fig.2fig.2Removing The Top And Bottom Panels 54DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc RecorderInstruction

30、s are best carried through in the following order:a)Slide off the plastic battery coverb)Remove the 4 screws (A) fig.1fig.1c)Remove the 2 screws (B) fig.2fig.2Removing The Top And Bottom Panels DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recorder76DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniD

31、isc Recordera)Remove the dual concentric record level knob (A) by pushing through from behind the front panel fig.5b)Remove the phone level knob (B) fig.5fig.5c)Remove 2 screws (C) fig.6fig.6Removing The Front Paneld)Remove the 2 screws (C) fig.3fig.3e)Remove the top panel. Caution: Disconnect speak

32、er connector (D) before fully separating the top panel from the machine fig.4fig.4f)Remove the bottom panelDISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recorder76DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recordera)Remove the dual concentric record level knob (A) by pushing through from

33、behind the front panel fig.5b)Remove the phone level knob (B) fig.5fig.5c)Remove 2 screws (C) fig.6fig.6Removing The Front Paneld)Remove the 2 screws (C) fig.3fig.3e)Remove the top panel. Caution: Disconnect speaker connector (D) before fully separating the top panel from the machine fig.4fig.4f)Rem

34、ove the bottom panelDISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recorder98DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recordera)Remove 4 screws (A) fig.9b)Remove the SPDIF optical protector plugs if connectedc)Lift up the CPU board carefully as the board is still attached by several cabl

35、esfig.9d)Disconnect 8 cables (1 - 8) and remove the board fig.10fig.10Removing The Main CPU Circuit Boardd)Remove 2 screws (D) fig.7fig.7e)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.8fig.8DISASSEM

36、BLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recorder98DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recordera)Remove 4 screws (A) fig.9b)Remove the SPDIF optical protector plugs if connectedc)Lift up the CPU board carefully as the board is still attached by several cablesfig.9d)Disconnect 8 cables

37、 (1 - 8) and remove the board fig.10fig.10Removing The Main CPU Circuit Boardd)Remove 2 screws (D) fig.7fig.7e)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.8fig.8DISASSEMBLY INSTRUCTIONSPORTADISC MD

38、P500 MiniDisc Recorder1110DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recordera)Remove 4 screws (A) fig.12fig.12b)Disconnect the XLR input cables, (9) and (10) fig.13c)Remove the Analog Sub pcbd)Remove 2 screws (B) to remove the metal shield plate fig.12e)Remove the Record Level Pot locking nu

39、t and washer (C) fig.13f)Disconnect cable, (11) fig.13g)Remove 3 screws (D) fig.13Removing The Analog Main & Sub Circuit Boardsa)Remove 4 screws (A) fig.11fig.11b)Ensure cables (3) and (4) are disconnected fig.10c)Lift out the MD mechanismRemoving The MD MechanismDISASSEMBLY INSTRUCTIONSPORTADISC MD

40、P500 MiniDisc Recorder1110DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recordera)Remove 4 screws (A) fig.12fig.12b)Disconnect the XLR input cables, (9) and (10) fig.13c)Remove the Analog Sub pcbd)Remove 2 screws (B) to remove the metal shield plate fig.12e)Remove the Record Level Pot locking nu

41、t and washer (C) fig.13f)Disconnect cable, (11) fig.13g)Remove 3 screws (D) fig.13Removing The Analog Main & Sub Circuit Boardsa)Remove 4 screws (A) fig.11fig.11b)Ensure cables (3) and (4) are disconnected fig.10c)Lift out the MD mechanismRemoving The MD Mechanism12fig.13h)Remove 5 screws (E) fig.14

42、i)Remove the connector side panel (F) fig.14j)Lift out the Analog Main pcb.fig.14DISASSEMBLY INSTRUCTIONSPORTADISC MDP500 MiniDisc Recorder13BLOCK DIAGRAMPORTADISC MDP500 MiniDisc Recorder15CPUPORTADISC MDP500 MiniDisc Recorder17POWER SUPPLY CPU BOARDPORTADISC MDP500 MiniDisc Recorder19ANALOG INPUTS

43、PORTADISC MDP500 MiniDisc Recorder21ANALOG OUTPUT & DIGITAL COAX I/OPORTADISC MDP500 MiniDisc Recorder24CPU PCB COMPONENT SIDEPORTADISC MDP500 MiniDisc Recorder25CPU PCB SOLDER SIDEPORTADISC MDP500 MiniDisc Recorder28ANALOG MAIN SOLDER SIDEPORTADISC MDP500 MiniDisc Recorder29ANALOG MAIN COMPONENT SI

44、DEPORTADISC MDP500 MiniDisc Recorder32ANALOG SUB PCB SOLDER SIDEPORTADISC MDP500 MiniDisc Recorder33ANALOG SUB PCB COMPONENT SIDEPORTADISC MDP500 MiniDisc Recorder35FRONT PANEL PARTS & SOLDER SIDEPORTADISC MDP500 MiniDisc Recorder37DECK PANEL PCBPORTADISC MDP500 MiniDisc RecorderThere are 4 types of

45、 reset function which may be used to eliminate abnormal behaviour in the Portadisc. If havingimplemented all the 4 reset types, and the MDP500 has not returned to normal behaviour, then investigate thepossibility of a fault or misalignment in the machine.The four reset types are listed below:1)F1 +F

46、2 reset. Resets factory defaults2)F1 +F3 reset. Resets factory defaults, user set-ups, clock3)Power reset. Remove all power from machine. Remove external dc supply and batteries. Re-connect power and power on.4)System reset. Remove bottom panel. Locate and press SW1 on the main pcb.3938RESET INFORMA

47、TIONPORTADISC MDP500 MiniDisc RecorderThere are 4 types of reset function which may be used to eliminate abnormal behaviour in the Portadisc. If havingimplemented all the 4 reset types, and the MDP500 has not returned to normal behaviour, then investigate thepossibility of a fault or misalignment in

48、 the machine.The four reset types are listed below:1)F1 +F2 reset. Resets factory defaults2)F1 +F3 reset. Resets factory defaults, user set-ups, clock3)Power reset. Remove all power from machine. Remove external dc supply and batteries. Re-connect power and power on.4)System reset. Remove bottom pan

49、el. Locate and press SW1 on the main pcb.3938RESET INFORMATIONPORTADISC MDP500 MiniDisc Recorder4140TEST MODE & ALIGNMENTPORTADISC MDP500 MiniDisc RecorderThere are two test modes.1)Switch Test Mode2)Mechanism Alignment Test ModeWhen ejecting a disc, always ensure that the disc has stopped rotating

50、by pressing STOP . In addition, please be awarethat the record protection tab on a mini-disc is not detected in test mode, therefore it is possible to overwriterecorded material.Hold down the F1 and Display buttons whilst simultaneously pressing the power switch. The Portadisc will appear tohave boo