Troubleshooting - Denon DVD-2910 Service Manual

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TROUBLE SHOOTING
1. GU-3612 MAIN UNIT
1.1. FL TUBE doesn't light
(1) Check the Set-up process of Syatem µ-COM
Check Power Supply Voltages.
GU-3612 (MAIN UNIT)
• [IC318] : 80, 14
+3.3V_D1, +3.3V_NSW
O.K.
Check Oscillation waveform.
GU-3612 (MAIN UNIT)
• [IC318] :
16MHz at 13pin.
O.K.
Check Power Supply Voltages.
GU-3612 (MAIN UNIT)
• [IC318] :
"H" level at 39pin? "L" level at 7pin and
44pin?
TE
O.K.
L 13942296513
Check Reset Signal
GU-3612(MAIN UNIT)
• [IC318] :
"H" level at 10pin?
O.K.
Check Data Bus between.
GU-3616-3 (DISPLAY UNIT)
FLD Driver (GU-3614-3 , IC101)
• [VFD_RST] : "H" level?
O.K.
Continue to next step.
Check the Set-up process of B/E µ-COM.
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http://www.xiaoyu163.com
N.G.
Check Soldering.
• CX141 on MAIN UNIT.
N.G.
Check Soldering.
• X302 on MAIN UNIT.
N.G.
Check Soldering.
• IC318 on MAIN UNIT.
N.G. Check Soldering.
• IC319 (Reset IC) on MAIN UNIT.
N.G.
(1) Check soldering of CY171 on MAIN UNIT.
(2) GU-3616-3 is N.G. (No Good).
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