Panasonic SA-MAX500LMK - Troubleshooting Guide for F61 and;or F76

9.2. Troubleshooting Guide for F61 and/or F76
This section illustrates the checking procedures when upon detecting the error of “F61” and/or “F76” after power up of the unit. It is
for purpose of troubleshooting and checking in SMPS, Main & D-Amp P.C.B..
5 Switching Regulator 5 IC5701 Faulty.
.ytluaF1575T6
Switching Mode Power Supply Control IC (IC5799) faulty.
Set can ON
1 Speaker Output 1 Faulty speaker unit, Loose connection, Short.
then F61
2 D-AMP circuit D-AMP IC, IC5700, IC5800, IC5000, IC5200, IC5300, IC5400 defective.
(Check DC voltage at speaker terminals, 3V and above defective)
DC Voltage ok but no sound, check DC Voltage at Pin 1.
2a, 2b ok but no sound, check PWM waveform at Pin 10 and Pin 14 .
If no PWM, 24 resistors defective.
Set can ON
1 Main Transformer T5701 Short circuit between Pin 11 and Pin 12 .
then F76
1b Short circuit between Pin 13 and Pin 14 .
1c Short circuit between Pin 16 and Pin 17 .
2
2
Regulator Circuits 2a
2b
2c
3
Q2022 faulty (No +5V output).
2d
IC2014 faulty (No +3.3V output).
2e
IC2011 faulty (No +5V output).
2f
L2001 Open.
3 Photocoupler
PC5720 solder crack,
PC5720
Dry joint, short circuit, open circuit.
1 Rectifier Diode D5801 Improper contact between D5801 to Heatsink.
Rectifier Diode D5802
TH5861
Improper contact between D5802 to Heatsink.
Thermistor TH5860,
1b Set trigger temperature protection.
Set can ON
working normally
for some time
then F76
Symptom Remarks
Set cannot ON 1 AC Cord 1 AC Cord Faulty, Loose connection.
2
3 Fuse, F1 3 Fuse, F1 Open .
4 Photocoupler 4 PC5702/PC5799 solder crack.
PC5702, PC5799 Dry joint, short circuit, open circuit.
IC2010 faulty (No +9V output).
L2000 Open.
Possible Fault(s)Checking Items
AC Inlet, P5701 P5701 solder crack, dry joint.
IC, IC5701
Main Transformer T5751
2
1a
Refer to
Section 9.1.1
Fig. 1. SMPS
P.C.B.
Refer to
Section 9.1.2
Fig. 2. and Fig.3.
Main P.C.B.
Refer to
Section 9.1.1
Fig. 1. SMPS P.C.B.
Refer to Section
9.1.1 Fig. 1. SMPS
P.C.B.
Refer to
Section 9.1.2
Fig. 3. Main P.C.B.
and Section 9.1.3
Fig. 4. D-Amp
P.C.B.
Refer to
Section 9.1.1
Fig. 1. SMPS
P.C.B.
2b
2a
5V ok condition, 2.5V or 0V defective.
2c
1a
6a
6b
D5798 faulty.
6c
For IC5000 (R5004, R5005, R5010, R5011).
For IC5400 (R5402, R5405, R5410, R5411).
For IC5200 (R5200, R5201, R5210, R5211).
For IC5300 (R5302, R5305, R5310, R5311).