Onkyo - Dvc601-Final[1] 电路图.pdf

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1、 Final release date:01/27/02 DV-C601, Ref: 112200-3 Service Tip and Troubleshooting: Make sure static free work environment is observed at all times when working with Laser Pickup. Symptoms: (1) Disk Starts, Spins and DISK ERROR comes up. (2) Disk plays with intermittent picture breaking up. (3) Dis

2、k fails to initialize, or locks up trying to read disk. (4) Plays DVD but fails to play CD or plays CD but not DVD. Mandatory Solution: Replace pickup connector cables, Remove pick-up connector intermediate PCB, update firmware with most recent version. Part Location Old Part number New part Number

3、Reason For change P112 2042183512 2042184012 Improved RF (Eye Pattern) P111 2042180512 Eliminated (Remove) RF Loss improved U7 1H412554-2 Eliminated (Remove) RF Loss improved E210 None 230957 (Add) RF Noise improved Before you start work, the following process must be addressed in order to avoid dam

4、age to the pickup assembly. Your finding may resemble the followings: a. Powers, rotates carousel, chucks, (clamps) and LD is not ON, and immediately un-chuck. b. Powers, chucks, and LD is on spins for a few seconds and unclamps goes to next disk. c. Powers, chucks, LD is on, spins and spins trying

5、to read TOC. Endless loop. d. DVD plays but not CD or plays CD not DVD. e. Picture breakup problem. Access hole for shorting pickup at the bottom. Must return cap when done. Fig1 Fig2 Fig3 Lift cap with a screwdriver. Short J019 with solder. Fig4 Remove top cover Fig5 Remove front panel screws Disco

6、nnect al wires from digital PCB. RadioFans.CN 收音机爱 好者资料库 Solution: Replace pickup connector cable. Second time around. Fig6 Fig7 Fig8 Front and rear panel removed Pull carousel forward with latch pushed down. Latch Carousel removed You may disconnect cable from P111B Remove two PCB mounting screws a

7、nd short pickup LD terminals. Connect cable PN#2042184012 directly to the pick-up. Please pay attention to the BLUE BACK. Bend the new cable PN#2042184012 at the point of red marking towards the marking. Re-assemble the unit back and attach the cable as illustrated next Fig14. It is important to kee

8、p the pickup shorted until last. Bend cable as you see on this picture. Please do not crush cable. Make sure the cable at connector CN501 is curled to a minimum to avoid cable break. Fig9 Fig10 Fig11 Fig12 Fig14 Set the unit on its side and de-solder the shorting from the pick up very carefully. Fig

9、15 Core PN#230957 must be installed at this point using double side tape. The bend seen in Fig11 shall match this corner (white mark). Return the clear vinyl as it was. Use double side tape to attach cable. Fig13 RadioFans.CN 收音机爱 好者资料库 Test points and references: A: make sure static free work envir

10、onment is observed at all times when working with Laser Pickup. With the unit totally turned OFF, confirm the impedance of the Focus Coil and the tracking coil at CN501. Between pin 10 and 13, 8.2ohm for Focus coil and across pin 11 and 12, 8.3ohm for the Tracking Coil. Check and verify procedure as

11、 given on page 43,44 of service manual. For disk to be recognized while carousel is rotating but fail to spin and focus is a result of missing LD ON. This happens when one of the connectors at any of the three points (Fig1 A, B and or Fig2 C) is lacking good contact to the ribbon. *The laser pick ne

12、eds no adjustment! * The troubleshooting guide given between pages of 43 and 50 is extremely helpful to determine the condition of the PICKUP. B: Disregarded Step 3 of page 45 and make correction as follows. The reference should be: lop = Voltage between E522 and E523 3.3ohm The voltage drop across

13、R505 (3.3ohm) resistor is higher than 218238mvDC in normal operating condition and the LD is not on, connection (Fig1 A, B and or Fig2 C) may be loose or poor. This indicates the LD is not present as load to the voltage rail R505. The Individual optical output level may be monitored at the pickup co

14、nnector point using an oscilloscope with no more than 10pf input capacitance. For location refer to manual Page 50. D: To help reduce the break up of the video signal, remount CORE #230957. The installation of this core should be as illustrated on Fig14. * Since the root cause for the failure of DV-

15、C600 and DV-C601 is mainly noisy pick-up signal do to poor connector terminals, it is very important all of the necessary steps mentioned are exhausted before attempting to replace the PICKUP. If the shorting PCB seen in Fig 3 is not in place, you will need to keep the DSP still connected to CN501 c

16、onnector until pick-up shorting is done as seen on figure 10. Keep DSP attached to the frame with an electrical tape. Fig16 TP-515 RadioFans.CN 收音机爱 好者资料库 Mandatory:Mandatory: Pi tfdtlDVDCDB thPicture freeze, does not play DVD, or CD or Both l t dblrelated problem. B flii kbl it i itt th t thBefore

17、replacing a pickup assembly it is important that the f llit hiddlMust add ferrite corefollowing component change is adressed properly. Do Not Attempt to Remove Optical Ribbon cable before Must add ferrite core PN#230957 or 230951Do Not Attempt to Remove Optical Ribbon cable before shorting the landi

18、ng found on the pick up assembly PN#230957 or 230951 shorting the landing found on the pick-up assembly. Short Pick up assembly and remove part U7. Part P112 have been replaced by Pn# 2042184012Pn# 2042184012 DV-C601 To check the Firmware version before update is done follow this process. Using the

19、remote controll Press ZOOM - 606 - ZOOM Thdilill hthithdillThe display will show the version on the display panel. If the dsiplay indicates a firmware of curent version need not update, unless PCB has been replaced. * Firmware runs in DOS mode only. * Firmware runs in DOS mode only Firmware runs in DOS mode only.