Denon DVD-A1UDCI, Service Manual

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36
DVD-A1UDCI
4. 8U-310001 (MAIN UNIT)
4.1. No System Power up or Loading
No Video or Audio output
䌍䌁䌉䌎
Check Supply Voltages from Power Supply Unit
Check Soldering and Wires from Power Supply Unit
䍃
+5V_BE, +5.5V_BE, +3.3V_NSW, +5V_NSW
䍃㪲㪚㪯㪇㪋㪋㪴㩷㪈㪃㩷㪉㫇㫀㫅㪃㩷㪲㪚㪰㪈㪌㪈㪴㩷㪈㪃㩷㪈㪊㪃㩷㪈㪋㫇㫀㫅
Check Supply Control signal to Power Supply unit Check Soldering
䍃 ON/STANDBY [CY151] 4pin
Check Supply Voltages at DCDC output. Check Soldering
+3.3V_D4, +1.8V_D4, +1.1V_D4, +1.2V_D5 䍃 [IC207][IC206][IC208][IC205] and Circumference
Check Supply Control signal to DCDC Check Soldering
䍃
BE_STANDBY,BE_POWER_1.8V,BE_POWER_CORE [IC853] 22,58,63,77pin, [CY151] 5pin
MV_POWER, FE_DISP_STANDBY
Check Reset signals Check Soldering
䍃 NRST [IC851] 4pin
䍃
FL_RST, PLL_RST, BE_RST [IC853] 23,24,61pin
Check Oscllation waveform Check Soldering
䍃
VMCLK, AMCLK1, AMCLK2
䍃
[R986][RR950][RR951]
Check FAN Control signals Check Soldering
䍃 FAN_ON, FAN_STOP [IC853] 26,70pin
Check AT1DATA[0:15] signals from FE Unit Check Soldering
䊶㪲㪚㪰㪋㪌㪉㪴㩷㪉㪄㪈㪎㫇㫀㫅 䍃
[CY452] and Circumference
Check DSD Data and Clock signals from FE Unit Check Soldering
䊶㪲㪚㪰㪋㪇㪉㪴㩷㪉㪌㪄㪊㪉㪃㪊㪌㪃㪊㪎㪃㪊㪐㫇㫀㫅 䍃 [CY402] and Circumference
Check Video signals from MPEG Decoder Check Soldering.
䊶㪛㪭㪛㩷㪲㪚㪰㪏㪇㪈㪴㩷㪊㪐㪄㪌㪋㫇㫀㫅 䊶 [CY801] and Circumference
䊶㪙㪛㩷㪲㪚㪰㪏㪇㪈㪴㩷㪊㪄㪊㪍㫇㫀㫅
Check Audio Data and Clock Signals to DAC Check Soldering.
䊶㪲㪚㪰㪉㪌㪉㪴㩷㪋㪄㪎㪃㩷㪐㪄㪈㪋㪃㩷㪈㪏㪃㩷㪉㪋㫇㫀㫅 䊶 [CY252][CY253] and Circumference
䊶㪲㪚㪰㪉㪌㪊㪴㩷㪋㪄㪈㪌㪃㩷㪈㪐㪃㩷㪉㪋㫇㫀㫅
N.G.
N.G.
N.G.
N.G.
O.K.
O.K.
O.K.
Continue to the check
process of Video or
Analog Audio Unit
N.G.
O.K.
N.G.
O.K.
N.G.
O.K.
N.G.
O.K.
N.G.
O.K.