DOWNLOAD Panasonic SA-PT880EE / SC-PT880EE Service Manual ↓ Size: 11.21 MB | Pages: 127 in PDF or view online for FREE

33

Update software

(Opecon)

If Opecon software update fail:

If Opecon software update 
completes successfully:

Update stop.
The theater set can’t work, 
and can’t be recovered by 
CD update again.

The theater set wll reboot
automatically.

FL Display 3: "FAIL" .

"UPDATE FAIL"

FL Display 3: "GOOD" .

Open the tray and take out
the CD, the update procedure
has been finished successfully.

Power off, then remove
AC Cord.

COMPLETED

PLEASE EJECT THE DISC

GUI Display 4:

FL Display 4: 

GUI Display 5:

FL Display 5: 

3

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 P.C.B. 

Set cannot ON

1

AC Cord 

1

Faulty AC Cord,Loose connection

Refer  to

2

AC Inlet P5701

2

P5701 soldier crack,dry joint,etc.

SMPS

3

Fuse  F1

3

F1 fuse open

P.C.B.

4

Photocoupler 
PC5702,PC5799

4

PC5702/PC5799 sildier crack,dry joint ,short 
circuit,open circuit,etc

Fig. 1

5

Switching IC IC5701

5

Faulty IC5701

6

Switching IC IC5799

6

Faulty IC5799

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 17

2

Power P.C.B.

2a

Check connection between Power P.C.B (CN2916 
& CN2917) and SMPS P.C.B (CN5802 & 
CN5803)

2b

L2902 Open (No input to IC2901)

2c

Faulty IC2901 (No output voltage at pin 10 & 11)

2d

Faulty Q2902 & Q2903 (Regulator)

2e

L2907 open (No DC +12v)

2f

L2908 op[en (No DC+5v)

3

3

Check cable connection between main (CN2004) 
and SMPS 

4

4a

Faulty IC2302

4b

LB2301 Open

5

Photocoupler

5

PC5720 solder crack

PC5720

dry joint,short circuit,open circuit,etc

Set can ON

1

Rectifier D5802

1a

Improper contact between D5802

working normally

to heatsink

for some time

1b

Set trigger tempriture protection

then F76

35

Figure 1. SMPS P.C.B.

36

Problems Checking 

Points

Checking 

components

b) Check video signals (Y,C)

LB8315, R8321, R8323,
LB8316,

(Y)
(C)

 R8325, R8327

a) Check SDRAM address, data 
bus, CLK and other control signals 
waveform

IC8051

1) Distorted picture or 
abnormal sound is head 
during the initialization

c) Check audio DAC circuitry 

* Compare the above with 
OK condition DVD Module
P.C.B

IC8001 (Pin 62, 63, 64)

R8402

*Check for solder short and/or  
component missing/damaged 

b) Check laser drive circuitry 
(Voltages & current) 

Q8551, Q8552  (For DVD),
Q8561, Q8562  (For CD)  

a) Check motor driver circuitry 
(+5V)

IC8251 Pin 8, 21

2) No TOC/Long TOC

c) Check LSI IC connection to

motor drive circuitry 
* Compare the above with OK 
condition Main P.C.B. 

IC8001 Pin 66, 67
IC8251 Pin 15 to 16 
* Check for solder short and/or 
component missing/damaged 

a) Check connection from 
Main to Traverse unit 

FP8251

3) Disc not spinning
4) Traverse not moving
5) Traverse and spindle 
abnormal  movement

b) Check motor driver circuitry on 
the voltages and control signals 

* Compare the above with 
OK condition Main P.C.B.

IC8251

* Check for solder short and/or  
component damaged

6) Cannot read the disc but 
spindle motor is spinning

- Cannot read CD/DVD

a) Check laser drive circuitry 
(voltages and current) 

     - Check CD Laser Drive 

     - Check DVD Laser Drive 

* Check voltages and LD current 

and compare with OK condition 

Main P.C.B.

Q8551, Q8552, LB8551
(For DVD Laser Drive current) 
Q8561, Q8562, LB8561 
(For CD Laser Drive current)  

7) Block Noise during play 

a) Check SDRAM address and

data bus signal

IC8051

8) Jitter out of specification

a) Check LD current

b) Check OPU (Change to other 
unit and confirmed operating
condition)

OPU Unit (Traverse unit), FPC
connection (FP8531 & FP8251)