2. POWER OFF with Blinking POWER LED
Check Power Supply Voltages for Analog Block Check Soldering.
MAIN B'D MCU,Function Bloc䌫 N.G 䊶 IC22,23 on MAIN B'D
䊶䈀IC21䈁:31pin AVCC+7V 䊶䈀BN61䈁:1pin,2pin ±12V on MAIN B'D
67pin AVCC-7V 䊶䈀CN92䈁1pin,2pin ±12V on SMPS B'D
䊶 SMPS B'D IC97,IC98,D945,D931
O.K.
Check Power Supply Voltages for Digital Block Check Soldering.
MAIN B'D MCU,Function Bloc䌫 N.G MAIN B'D MCU,Function Bloc䌫
䊶䈀IC64䈁:3pin 䋫3.3V 䊶 IC64
䊶䈀WC52䈁:3pin HB+ 䊶䈀BN61䈁:4pin SW5.6V
䊶䈀WC52䈁:3pin 27VA
D.POWER AMP B'D
䈀WP52䈁:3pin 27VA
䈀CN91䈁:1,2,3,7pin 27VA
SMPS B'D
䈀BN91䈁:1,2,3,7pin 27VA
D931
O.K.
Check Protect Signal for System uCOM. Check Soldering.
MAIN B'D MCU,Function Bloc䌫 N.G MAIN B'D MCU,Function Bloc䌫
䊶 [IC62]:71pin PROT_2 High Level OK? 䊶 D371,D373,D374
O.K.
Check Protect Signal for D.Power Amp Check Soldering.
D.POWER AMP B'D N.G D.POWER AMP B'D
䊶䈀IC53䈁:3pin 12V 䊶 IC54
䊶䈀IC54䈁:17pin SD,18pin OTW,19 pin READY 䊶 IC53
High Level OK? ㇱຠ⏕
䊶 IC54,IC53
䊶 D.Power Amp Heat Sink
O.K.
Check Control Singal for DC Protect Check Soldering.
䊶 Q573_B Low Level OK? MAIN B'D MCU
䊶 Q571,572,573,574
䊶 D571,572
N.G Check Parts
䊶 Q571,572,573,574
䊶 D571,572
O.K.
Check Protect Signal for System uCOM.
Check Soldering.
MAIN B'D MCU,Function Bloc䌫 N.G
MAIN B'D MCU
䊶 [IC62]:74pin PROT_1 High Level OK? 䊶 D570
D.POWER AMP B'D
䊶 D504,D505,D506
END
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