DOWNLOAD Sony KF-50XBR800 / KF-60XBR800 Service Manual ↓ Size: 10.86 MB | Pages: 127 in PDF or view online for FREE

– 9 –

• In cases of malfunctions where it is not possible to determine the symptom such as when the power goes off occasionally or when the

screen disappears occasionally, there is a screen display on whether the malfunction occurred or not in the past (and whether the detection

circuit operated or not) in order to allow confirmation.

<Screen Display Method>
• Quickly press the remote command button in the following order from the standby state.

• The results display is not automatically cleared.  In case of repairs and after repairs, check the self-diagnosis screen and be sure to return

the results display to “ 0 ”.

• If the results display is not returned to “ 0 ” it will not be possible to judge a new malfunction after completing repairs.

<Method of Ending Self-Diagnosis Screen>
• When ending the self-diagnosis screen completely, turn the power switch OFF on the remote commander or the main unit.

          

  b    b   ! b  "#$  %&' (

)   * b #+,#$  ,  - .' / '&&

J

Be aware that this differs from the method of

entering the service mode (volume + ).

DISPLAY b Channel 5 b VOL Ð b POWER

 

       

    

      

 

  

B

 b

 

   

! " !

– 10 –

3 : Lamp Cover

When lamp cover SW is opened then pin 4 of CN1012 on the A board is high, LCD Engine µ-com (IC9502) detects
it and make turn off the lamp.

4 : FAN Stop

When FAN1 or FAN2 is stopped then pin 8 or q; of CN1012 on the A board is high, LCD Engine µ-com (IC9502)
detects it and make turn off the lamp.

5 : Lamp Driver

When lamp is not turned on then pin wl of LCD Engine µ-com (IC9502) is high, checks pin wk of LCD Engine µ-com
. If pin wk is low, it is judged no High Voltage.

6 : Low B

Detect +5 V line failure.

9 : Audio

When DC is appeared by audio amp failure at speaker line.

Then it is detected by MAIN µ-com (IC9004) and it turns off the main power.

LAMP : Lamp error

When lamp is not turned on then pin wl of LCD Engine µ-com (IC9502) is high, checks pin wk of LCD Engine µ-com.
If pin wk is high, it is judged lamp is burned out.

     

   

 

 

 

 

  

! 

"

"

 #

 

 

! 

 

$

" 

 

   

% &'  ()

 

! 

 

" 

" 

% " *'

% +,

-% . 

   /

01/2

$

 

0 1 

 

 1 

$

– 11 –

2

 

1

 

   

1

 

   

1

Six screws

(+BVTP 4 x 16)

2

OU bracket

3

 

   

7

 

6

4

 

5

 

   

1

2

 

   

2

   

1

   

3

– 12 –

1

Connector

1

Connector

3

   

2

  

     

   

                 

       

       

             

              

           

   

5

RF antenna switch

4

Two washers

Nine screws

(+BVTP 3 x 12)

1 

 

 

 

 

 

 

 

 

3 

 

 

 

 

 

 

 

 

Screw

(+BVTP 4 x 16)

8

Two screws

(+BVTP 3 x 12)

Terminal board

assembly

Bracket M

6

2

7

UD board

9

Claw