HHB-CDR882-cdr-sm 电路图维修手册.pdf

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1、 CDR-882 DualBurn Service Manual Version 1.3 February 2009 RadioFans.CN 收音机爱 好者资料库 CDR-882 Service Manual Version 1.3 Page 2 of 37 Table of contents 1 Important information . 5 2 Disassembly and assembly . 6 2.1 Lid removal . 6 2.2 Removal of CD drives . 8 2.3 Rear board P8202 removal . 13 2.4 Mothe

2、rboard P8200 removal . 14 2.5 Power supply removal . 18 2.6 Front panel removal . 19 2.7 Front panel disassembly . 21 2.8 Removing the power cables . 24 3 PCBs overview . 26 3.1 Motherboard P8200 . 26 3.2 Switches board P8201 . 28 3.3 Rear board P8202 . 29 3.4 Headphones board P8203 . 30 3.5 PS2 boa

3、rd P8204 . 31 3.6 Power switch backlight board P8205 . 32 3.7 Power switch board P8206 . 33 4 Fault finding. 34 4.1 The unit doesnt power up . 34 4.2 The unit doesnt power up properly or freezes while powering up . 34 4.3 Some buttons dont respond or some LED dont flash . 35 5 Firmware updates . 36

4、5.1 CDR-882 firmware update . 36 5.2 Drive firmware update . 37 RadioFans.CN 收音机爱 好者资料库 CDR-882 Service Manual Version 1.3 Page 3 of 37 Table of Figures Figure 2.1-1: Remove the four screws on the top . 6 Figure 2.1-2: Remove the six screws on the sides . 6 Figure 2.1-3: Remove the seven screws on t

5、he rear . 6 Figure 2.1-4: Push to unlock lid . 6 Figure 2.1-5: Interior of the unit . 7 Figure 2.2-1: Data and power cables on the back of the drive . 8 Figure 2.2-2: Bus and power cables removal from the drive . 8 Figure 2.2-3: Bus and power cables on the motherboard . 8 Figure 2.2-4: Disconnect bu

6、s and power cables from the motherboard . 9 Figure 2.2-5: Cut tie holding the power cables for drive 1 . 9 Figure 2.2-6: Twelve screws that hold the drives brackets in place . 10 Figure 2.2-7: How to reach the screw under the power switch. . 9 Figure 2.2-8: Removing the drives from the chassis . 10

7、Figure 2.2-9: Push the eject lever under the tray to eject the disc tray . 11 Figure 2.2-10: Door removal . 11 Figure 2.2-11: 4 screws that hold each bracket attached to the drives . 11 Figure 2.2-12: Drive, brackets and door disassembled . 12 Figure 2.3-1: FFC socket on the upper board . 13 Figure

8、2.3-2: Unlocking the FCC on the upper board . 13 Figure 2.3-3: FFC removal . 13 Figure 2.3-4: Eight screws, two stand-offs and nut and washer on the rear panel . 14 Figure 2.3-5: Pliers used to remove the BNC nut . 14 Figure 2.3-6: Nut-driver used to remove the serial port stand-offs . 14 Figure 2.4

9、-1: Different connectors on the motherboard . 15 Figure 2.4-2: 3 FFCs on the motherboard . 15 Figure 2.4-3: Screws and stand-offs that hold the motherboard to the rear panel . 15 Figure 2.4-4: Screws that hold the motherboard to the chassis . 16 Figure 2.4-5: Push to release the motherboard from the

10、 rear panel . 16 Figure 2.4-6: Remove loose cables . 17 Figure 2.5-1: Remove the four screws and disconnect the Molex type connector . 18 Figure 2.5-2: CDR-882 switched mode power supply . 18 Figure 2.6-1: 8 screws that hold the panel to the chassis . 19 Figure 2.6-2: 3 crews that hold the headphone

11、s board . 19 Figure 2.6-3: Six more screws that hold the front panel to the chassis . 20 Figure 2.6-4: Remove the front panel . 20 Figure 2.6-5: Front panel standing alone . 20 Figure 2.7-1: Remove pots . 21 Figure 2.7-2: Release the switches board from the panel . 21 Figure 2.7-3: Unlock the FFC .

12、21 Figure 2.7-4: Separate the switches and PS2 boards . 22 Figure 2.7-5: Remove the volume pot . 22 Figure 2.7-6: Remove all the buttons from the front panel . 22 Figure 2.7-7: Front panel and buttons . 23 Figure 2.7-8: 4 screws that hold the LCD in place . 23 Figure 2.7-9: Front panel completely di

13、sassembled. 23 Figure 2.8-1: Remove power cabling . 24 RadioFans.CN 收音机爱 好者资料库 CDR-882 Service Manual Version 1.3 Page 4 of 37 Figure 2.8-2: Remove flat push connectors . 25 Figure 2.8-3: Remove the power button . 25 Figure 2.8-4: Remove screws and sleeve . 25 Figure 3.1-1: Motherboard . 26 Figure 3

14、.1-2: Motherboard with the most important components highlighted . 26 Figure 3.2-1: Switches board . 28 Figure 3.2-2: Switches board with the most important components highlighted . 28 Figure 3.3-1: Rear board . 29 Figure 3.3-2: Rear board with the most important components highlighted . 29 Figure 3

15、.4-1: Headphones board . 30 Figure 3.4-2: Headphones board with the components highlighted . 30 Figure 3.5-1: PS2 board . 31 Figure 3.5-2: PS2 board with the components highlighted . 31 Figure 3.6-1: Power switch light board . 32 Figure 3.6-2: Power switch light board . 32 Figure 3.7-1: Power switch

16、 board . 33 Figure 3.7-2: Power switch board with the components highlighted . 33 CDR-882 Service Manual Version 1.3 Page 5 of 37 1 Important information This service manual is written for the use of trained service personnel only. Disassembly of the CDR-882 DualBurn by an untrained operative could

17、cause severe damage to the unit, and will invalidate the CDR-882 DualBurn warranty. It is essential that all normal electrostatic discharge (ESD) protection procedures are carefully followed. Damage caused by ESD will not be covered by any warranty. During reassembly, check that all cables are recon

18、nected and are in the correct sockets. This manual contains sections on disassembly/assembly, firmware updates and known faults. Throughout this manual, part numbers are enclosed in square brackets (for example P8202). Please note that only a few component parts are available for the printed circuit

19、 boards (PCB) as changing a majority of the PCB components is not considered practical for field service. If faults occur, it is likely the whole PCB will have to be replaced. Tools Normal workshop tools for work on small electronic assemblies are required. Notes For your own safety, the mains power

20、 cord should be removed before disassembly takes place. No part of this manual may be reproduced or copied. HHB Communications Ltd. DualBurn website CDR-882 Service Manual Version 1.3 Page 6 of 37 2 Disassembly and assembly In general the assembly is the reverse process of disassembly. Thus, only di

21、sassembly is explained in this section. 2.1 Lid removal For a majority of service operations it will be necessary to remove the lid. 1. First remove all the screws that hold the lid to the chassis. There are four screws on the top (labelled as “A” in Figure 2.1-1), three screws on each side (labelle

22、d as “B” and C” in Figure 2.1-2) and seven screws on the rear (labelled as “D” in Figure 2.1-3). Figure 2.1-1: Remove the four screws on the top Figure 2.1-2: Remove the six screws on the sides Figure 2.1-3: Remove the seven screws on the rear 2. Slide the lid horizontally away from the front panel

23、to unlock the lid (as in Figure 2.1-4). Lift vertically away from the chassis to remove it completely. Figure 2.1-4: Push to unlock lid CDR-882 Service Manual Version 1.3 Page 7 of 37 The most important parts inside the chassis have been highlighted in Figure 2.1-5: E) Drives 1 and 2 F) Mains cable

24、IEC inlet G) Switched Mode Power Supply (SMPS) H) Motherboard P8200 and rear board P8202 Figure 2.1-5: Interior of the unit CDR-882 Service Manual Version 1.3 Page 8 of 37 2.2 Removal of CD drives To remove the drives: 1. First carefully disconnect the data and power cables connected to the back of

25、the drives (“A” and “B” in Figure 2.2-1, also see Figure 2.2-2). Figure 2.2-1: Data and power cables on the back of the drive Figure 2.2-2: Bus and power cables removal from the drive 2. Also carefully disconnect the cables from the motherboard (“C” and “D” in Figure 2.2-3, also see Figure 2.2-4). F

26、igure 2.2-3: Bus and power cables on the motherboard CDR-882 Service Manual Version 1.3 Page 9 of 37 Figure 2.2-4: Disconnect bus and power cables from the motherboard 3. To remove the power cables for drive 1, cut the tie to release the cables from the bottom of the chassis (Figure 2.2-5). This tie

27、 should be re-fitted when reassembling the unit. Figure 2.2-5: Cut tie holding the power cables for drive 1 4. Remove all twelve screws holding the drives (and brackets) to the bottom of the chassis (”E” in Figure 2.2-7). To reach the two screws near the power switch, a long thin screwdriver is need

28、ed as access to the screw is restricted (Figure 2.2-6). Figure 2.2-6: How to reach the screw under the power switch. CDR-882 Service Manual Version 1.3 Page 10 of 37 Figure 2.2-7: Twelve screws that hold the drives brackets in place 5. The drives can now be removed. Release each drive by gently movi

29、ng them backwards away from the front panel and then lift them to remove from the chassis (Figure 2.2-8). Figure 2.2-8: Removing the drives from the chassis CDR-882 Service Manual Version 1.3 Page 11 of 37 6. The “door” of the disc tray and the brackets can be removed from the drive. To remove the t

30、ray, first eject it by pushing the eject lever on the front of the drive (Figure 2.2-9). Figure 2.2-9: Push the eject lever under the tray to eject the disc tray 7. Pull the tray fully open and carefully remove the door by unclipping it from the two retainers on the bottom edge of the tray. Then lif

31、t the door free (Figure 2.2-10). Figure 2.2-10: Door removal 8. To remove the brackets unscrew the four screws on each side (”F” in Figure 2.2-11). Figure 2.2-11: 4 screws that hold each bracket attached to the drives Figure 2.2-12 shows a drive with both brackets and door removed. CDR-882 Service Manual Version 1.3 Page 12 of 37 Figure 2.2-12: Drive, brackets and door disassembled The drives model is the DH-52R2P from LiteOn. The MTBF (mean time before failure) for this model is 80,085 at 25% duty cycle and room temperature. It should be replaced if faulty. CDR-882 Service Manual