22
7 Troubleshooting Guide
7.1.
Troubleshooting Guide for F61 and/or F76)
This section illustrates the checking procedures when upon detecting the error of “F61” and “F76” after power up of the unit.It is for
purpose of troubleshooting and chaking in SMPS,D-Amp & Main P.C.B..
Symptom
Remarks
Set cannot ON
1
AC Cord
1
Faulty AC Cord, Loose connection
Refer to
section 7.2.1
Fig.1 SMPS P.C.B..
Refer to
section 7.2.1
Fig.1 SMPS P.C.B..
Refer to
section 7.2.1
Fig.1 SMPS P.C.B..
Refer to
section 7.2.2
Fig.2 Main P.C.B..
2
AC Inlet, P5701
2
P5701 solder crack, dry joint.
3
Fuse, F1
3
Fuse, F1 Open
4
Photocoupler
4
PC5702/PC5799 solder crack.
PC5702, PC5799
Dry joint, short circuit, open circuit.
5
Switching IC, IC5701
5
IC5701 Faulty.
6
Switching IC, IC5799
6
IC5799 Faulty.
Set can ON
1
Speaker Output
1a
Faulty speaker unit, Loose connection, Short.
2a
D-Amp IC5000, IC5200, IC5300, IC5400 defective.
Check PWM output at pin 10, 14 of D-Amp IC.
Check + VDD/SS supply at pin 4 & 20 of D-Amp IC.
Check pin 1 (OSC) & pin 23 (MODE) of D-Amp IC.
Check pattern crack and solderability.
Refer to section
7.2.3 Fig 3 D-Amp
P.C.B..
Refer to section
7.2.4 Fig 4
Surround
D-Amp P.C.B..
then F61
2
D-AMP circuit
2b
D-AMP IC, IC5900 defective.
1b
Check output IC (Pin 10 & 14) which have DC Voltage
(DC voltage of +/-30V detected at speaker output)
Set can ON
1
Transformer T5701
1a
Short circuit between Pin 14 and Pin 15.
at speaker output short to Vdd/Vss.
then F76
1b
Short circuit between Pin 15 and Pin 16.
1c
Short circuit between Pin 16 and Pin 17.
2
DC-DC Circuit
2a
Check cable wire connection between connector
CN2014(At Main P.C.B) & connector CN5802
2b
Voltage regulator IC (IC2010) & DC/DC Converter IC
3
Photocoupler
3
PC5720 solder crack.
PC5720
dry joint, short circuit, open circuit.
Set can ON
1
Rectifier D5801
1a
Improper contact between D5801 to Heatsink
Improper contact between D5802 to Heatsink
working normally
Rectifier D5802
for some time
2
Thermistor TH5860
1b
Set trigger temperature protection.
then F76
Possible Fault(s)
Checking Items
(At SMPS P.C.B)
(IC2011) faulty.
Содержание SA-AKX90PH
Страница 13: ...13 5 Location of Controls and Components 5 1 Main Unit Key Button Operation ...
Страница 14: ...14 5 2 Remote Control Key Button Operation ...
Страница 15: ...15 5 3 Media Information ...
Страница 20: ...20 6 4 Self Diagnostic Mode ...
Страница 24: ...24 7 2 2 Main P C B Fig 2 Main P C B Connector CN2014 Voltage Regulator IC IC2010 DC DC Converter IC IC2011 ...
Страница 26: ...26 7 2 4 Surround D Amp P C B Fig 4 Surround D Amp P C B D Amp IC IC5900 ...
Страница 32: ...32 9 2 Main Components and P C B Locations ...
Страница 84: ...84 ...
Страница 94: ...94 ...
Страница 96: ...96 ...
Страница 124: ...124 ...
Страница 129: ...129 21 1 2 Packaging ...
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