Denon DVD-3930 Service Manual

Also see for DVD-3930: Specification Operating instructions Service manual

Contents

32DVD-3930/3930CI2.2. Image is not displayed. (Blue-back, DENON wallpaper)2.3. Does not Read Disc[00 00] displayed etc.(1) Disc does not Rotate.Check Data BusGU-3750-1(DISPLAY UNIT)FLD Driver (GU-3750-1), IC101 60pin• [VFD_RST]: "H" level?• The test mode "T0" is executed.The FL tube display turns all on?N.G.GU-3749-1(MAIN UNIT)(1) Check Soldering of CX211GU-3750-1(DISPLAY UNIT)(2) GU-3750-1 is N.G.O.K.Check Digital output signal for Video. [1]GU-3749-1(MAIN UNIT)• [IC154] 4pin: PCLK• [IC157] 176~183pin: YUV(0-7)N.G.Check Soldering.GU-3749-1(MAIN UNIT)• [IC154]: 4pin, R257, R439• [IC157]: 176-183pinO.K.Check Digital output signal for Video. [2]GU-3749-1(MAIN UNIT)• [CX211]: PCLK, 20pin• [CX211]: YUV(0-7), 11-18pinN.G.Check Soldering.GU-3749-1(MAIN UNIT)• [CX211]: 20pin, R439• [CX211]: 11-18pin, R283-290O.K.Continue to the check process ofGU-3749-2(VIDEO UNIT)Check the Emission of Pick-up.GU-3749-1(MAIN UNIT)• Emission of P.U. laser O.K.?• The test mode "T2" is executed.Laser current O.K.?N.G.(1) Check Soldering of P.U.• short-circuit?(2) Check the circumference soldering of TR150 andTR153.(3) Check connector insertion.• [P.U.]-[GU-3749] FFC(CX241)(4) Check the soldering [IC157] and circumferencesoldering of [IC157](5) Check the soldering [IC151] and circumferencesoldering of [IC151]O.K.Check Spindle drive.GU-3749-1(MAIN UNIT)• [SPINDLE]: "H" level?N.G.(1) Check soldering of [IC157]:85, 90pin(2) Check the circumference soldering of[SPINDLE], [FGIN] signal.(3) Check the soldering [IC151] and circumferencesoldering of [IC151]O.K.ENDENDw w w . x i a o y u 1 6 3 . c o mQ Q 3 7 6 3 1 5 1 5 0 992894298T E L 1 3 9 4 2 2 9 6 5 1 3 992894298051513673QQTEL 13942296513 QQ 376315150 892498299TEL 13942296513 QQ 376315150 892498299http://www.xiaoyu163.comhttp://www.xiaoyu163.com