DOWNLOAD Panasonic SA-VKX80GA / SA-VKX80GC / SA-VKX80GS Service Manual ↓ Size: 13.35 MB | Pages: 127 in PDF or view online for FREE

33

 The lock can be cancelled by the same procedure as used in setting.(“UNLOCK” is displayed on cancellation) At normal Power

ON/OFF the LOCKED condition is not cleared.However AC Power ON/OFF should clear LOCKED condition).

 Remote con-

troller unit

EXT-IN, REPEAT, RADIO, NUMERIC KEYS 0~9, 

,

,

,

,

,

,

,

RETURN, FUNCTIONS,

FL DISPLAY, SLEEP, MUTE, MENU, USB   , TAPE, TOP MENU, SETUP, GROUP.

34

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, 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

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
then F61

Set can ON

1

Transformer T5701

1a

Short circuit between Pin 14 and Pin 16.

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 
ZJ2701(At Main P.C.B) & connector CN5802

2b

Voltage regulator IC (IC4200) & 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) 

(IC4000) faulty.

1

Speaker Output

1a

Faulty speaker unit, Loose connection, Short.

1b

Check output IC (Pin 10 & 14) which have DC Voltage
at speaker output short to    Vdd/Vss.

D-Amp IC5000, IC5200, 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.

2

D-AMP circuit

Refer to section 
7.2.3 Fig 3 D-Amp
P.C.B..

35

Fig. 1 SMPS P.C.B.

36

Fig. 2 Main P.C.B.