DOWNLOAD Sony KF-E42A10 / KF-E50A10 Service Manual ↓ Size: 5.38 MB | Pages: 60 in PDF or view online for FREE

– 9 –

Section

Title

Page

––––––

––––

––––

5-1.

Screen Mirror Block, Cover ...............................

50

5-2.

B Block, Chassis Assembly ...............................

51

5-3.

Lamp Duct Assembly, Optics Unit Block .........

52

• AS Board ...................................................................

53

• GT Board ..................................................................

55

• HA Board ..................................................................

58

• HB Board ..................................................................

58

• HC Board ..................................................................

59

• S2 Board ....................................................................

59

• T1 Board ...................................................................

59

• T2 Board ...................................................................

59

– 10 –

- This device includes a self-diagnosis function.
- In case of abnormalities, the POWER/STANDBY indicator automatically blinks. It is

possible to predict the abnormality location by the number of blinks. The Instruction
Manual describes blinking of the POWER/STANDBY indicator.

- If the symptom is not reproduced sometimes in case of a malfunction, there is recording of

whether a malfunction was generated or not. Operate the remote command to confirm the
matter on the screen and to predict the location of the abnormality.

- When a malfunction occurs the POWER/STANDBY indicator only blinks for one of the

following diagnosis items. In case of two or more malfunctions, the item which first
occurred blinks. If the malfunctions occurred simultaneously, the item with the lower
blink count blinks first.

- The screen display displays the results regarding all the diagnosis items listed below.

The display "0" means that no malfunctions occurred.

La

Lamp temp. over

mp cover error

3

2 times

times

- Lamp cover is not
attached securely.

Iris error

0

Lamp driver error

5 times

- Lamp driver is faulty.

- No picture/No sound

Low B error

6 times

- D5V is not
supplied.

- No picture/No sound

- Lamp for the light
source burns out.

- No picture/No sound

- Speaker line is shorted.

- IC2605, IC2606 or IC2608

is faulty.

- PS2600, PS2601 or PS2602
opened.

D-

ATSC OVP

OVP error

8

10 times

times

- +3.3V or +2.5V or +1.8V is
over voltage.(ASU board)

- No picture/No sound

Fan stopped

4 times

- Fan1, Fan2, F an 3, Fan

power is not

supplied.
- Fan connector is not
attached securely.

- No picture/No sound

Lamp error

LAMP-LED flashes

- No picture/No sound

Audio error

7 times

- No picture/No sound

4 or Fan 5

– 11 –

- One blink is not used for self-diagnosis.

- Example
Diagnosis item

LED blinks

Lamp cover

3 times

Fan

4 times

LED ON : 0.3sec
LED OFF : 0.3sec

The POWER/STANDBY indicator blinking display is released by removing the plug from
the power or leaving for 2 minutes.

- 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.

- Quickly press the remote command button in the following order from the standby state.

Channel

Vol

Be aware that this differs from
the method of entering the
service mode (Vol +).

LED OFF

3.0sec

DISPLAY

5

-

POWER

1

: LOWB_ERROR

0

 2

: D_OVP

0

 3

: ATSC_OVP

0

4

: TEMP_ERROR

0

 5

: AUDIO_PROT

0

6

: LAMP_TEMP

0

7

: LAMP_ERROR

0

8

: LAMP_COVER

0

9

: LAMP_DRIVER

0

10

: FAN_ERROR

0

SELF CHECK

- Numeral "1" means a fault was detected one time
- Numeral "0" means that no fault was detected

– 12 –

- 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.

1. Power off (Set to the standby mode)

2.

Channel

Vol

3. Channel

- When ending the self-diagnosis screen completely, turn the power switch OFF on the

remote commander or the main unit.

8

ENTER

DISPLAY

5

-

POWER

1

:

Low B error

When the voltage converted on ASU DC-DC Converter D5V is low, TVM
(TV u-com) detects it and makes turn off the lamp.

 2

:

D-OVP

When the output voltage from ASU DC-DC converter is abnormally high, 
TVM detects it and makes turn off the lamp.

3

:  ATSC OVP

When the voltage converted by IC6403 on G board is abnormally high, TVM 
detects it and makes turn off the lamp.

4

:

lamp temp over

When the inside temperature sensed with IC1700, IC1800, IC1900 and 
IC5066 mounted on S1 board, S2 board, S3 board and C board respectively 
exceed the threshold, DEM (Display Engine u-com) detects it and makes 
turn off the lamp. 

5

:

Audio

When DC is appeared by audio amp failure at speaker line, DEM detects it 
and makes turn off the lamp.

8

:

lamp cover

When the lamp cover is opened or harness from T board is off, DEM detects it 

and makes turn off the lamp.

9

:

Lamp Driver

When the ballast is not working with high voltage, DEM detects it and makes 
turn  off the lamp.

10

:

FAN 

When any FAN (FAN1~FAN5) is stopping or harness is not connected correctly, 
DEM detects it and makes turn off the lamp

LAMP

:

Lamp

When the lamp is broken, DEM detects it.