Denon DVD-3930 Service Manual

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

Contents

31DVD-3930/3930CI2. GU-3749-1 (MAIN UNIT)2.1. FL TUBE dosen't light(1) Check the Set-up process of SystemCheck Power Supply Voltages.GU-3749-1(MAIN UNIT)• [IC157] 69+3.3V_NSW OK?N.G. Check Soldering.GU-3749-1(MAIN UNIT)• MAIN UNIT: CY132O.K.Check Power Supply Voltages.GU-3749-1(MAIN UNIT)• [IC157] 83, 102 [IC154] 1+1.2V_DV3.2, +3.3_A, +3.3_D1 OK?N.G.Check the output level.GU-3749-1(MAIN UNIT)• [CY132] 13pin[ON/ST]: "H" level?N.G. Check Soldering.GU-3749-1(MAIN UNIT)• [IC403] 2pinO.K.Check Soldering.GU-3749-1(MAIN UNIT)• [IC102](PQ012FZ01ZP)Check Reset signal.GU-3749-1(MAIN UNIT)• [IC157]"H" level at 84pin?N.G. Check Soldering.GU-3749-1(MAIN UNIT)• [IC153](Reset IC), R237O.K.Check Oscillation waveform.GU-3749-1(MAIN UNIT)• [IC157] 162, 163, 186, 190pin27MHz at 162, 163, 183 pin33.87MHz at 190pinN.G. Check Clock waveform.GU-3749-1(MAIN UNIT)• [IC154] 7, 15pinN.G.Check Soldering.GU-3749-1(MAIN UNIT)• MAIN UNIT: X150• [IC154](SM8707)O.K.Check Soldering.GU-3749-1(MAIN UNIT)• R271, R273, R274, R253,R264, R292, R294Check Bus Line.Check Address, Data Bus betweenGU-3749-1(MAIN UNIT)• [IC157] and [IC155](Flash Rom)"H" "L" alternate?N.G. Check Soldering.GU-3749-1(MAIN UNIT)• [LD0-LD15], [LCS3, LOE]O.K.Check Bus Line.Check Address, Data Bus betweenGU-3749-1(MAIN UNIT)• [IC157], [IC156] and [IC158] (SDRAM)"H" "L" alternate?N.G.Check Soldering.• Address, Data Bus, Control Signal.[MDQ0-24], [MA0-9], [NCAS], [NRAS]• Check the soldering [IC156] [158]andcircumference soldering of [IC156] [158].O.K.Check I 2 C Signal.GU-3749-1(MAIN UNIT)• [IC157]"H" "L" alternate?N.G. Check Soldering.GU-3749-1(MAIN UNIT)• [IC152] and [IC157]O.K.O.K.w 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