DOWNLOAD Sony KP-51WS505 Service Manual ↓ Size: 9.11 MB | Pages: 127 in PDF or view online for FREE

The following adjustments should always be performed when replacing 
IC501, R5032.
1.  Supply 130VAC to variable autotransformer.

2.  Receive dot signal pattern and set the PICTURE and BRIGHTNESS 

settings to their minimum.

3.  Confi rm the voltage of TP +B 135V is less than 137.0Vdc.

4.  If step 3 is not satisfi ed, replace IC501 and repeat steps 1-3.

1.  Add to low voltage power supply between to TP5001 and ground.

2.  Supply 120VAC to variable autotransformer.

3.  Power on the Set and receive dot signal pattern.

4.  Set the PICTURE and BRIGHTNESS settings.

5.  Check the OVP is activated.

 

Operate :less than 2.50V

1.  Receive the all black (1080i, component) signal with VIDEO 5 input, 

and set PICTURE to maximum.

2.  Connect an oscilloscope between CN5 

i

 pin (B) on the (A board) 

and ground.

3.  Set in the service mode and select the category “2150D-2”.

4.  Adjust “SLIN” so that the waveform level is 2.20 ± 0.05Vpp.

5.  After completing the adjustments, write the data into memory by 

pressing “MUTING” Æ “ENTER” on the remote commander.

6.  Receive the RF signal and change the wide screen mode to “Wide 

Zoom”.  Copy the same data to “SLIN”.

Reference Pulse

2.20 ± 0.05 Vp-p

GND

16.7ms

1.  Receive the signal.

 

TV terminal (sub) 

: Color-bar (white-75%, 7.5% setup)

 

VIDEO terminal (main) 

: Color-bar (white-75%, 7.5% setup)

2.  VIDEO MODE   

: Pro

 PICTURE 

 

: 

Maximum

 COLOR 

 

: 

Minimum

 

2150P-2 1 RGBS 

: 2

3.  Set to P & P mode, and set to service mode.

4.  Connect an oscilloscope between the check point and ground.

 

Check points  

: CN5 pin h

  A Board 

: CN5 pin h

5.  Select “2103-1-02” (Main scon), and adjust so that the waveform level 

of V

WB

 is 1.55 ± 0.04Vp-p.

6.  Select “2103-2-02” (Sub scon), and adjust so that the waveform level 

of V

WB 

is 1.55 ± 0.04Vp-p.

7.  After completing the adjustments, write the data into memory by 

pressing “MUTING” Æ “ENTER” on the remote commander.

White

Black

V

WB

1.  Receive the signal.

 

TV terminal (sub) 

: Color-bar (white-75%, 7.5% setup)

 

VIDEO terminal (main) 

: Color-bar (white-75%, 7.5% setup)

2.  VIDEO MODE   

: Pro

 PICTURE 

 

: 

Maximum

 COLOR 

 

: 

Minimum

 

 2150P-2 1 RGBS 

: 2

3.  Set to P & P mode, and set to service mode.

4.  Connect an oscilloscope between the check point and ground.

 

Check points  

: CN5 h

  A Board 

: CN5 h

5.  Select “2103-1-02” (Main scon), and adjust so that the waveform level 

of V

WB

 is 1.55 ± 0.04Vp-p.

6.  Select “2103-2-02” (Sub scon), and adjust so that the waveform level 

of V

WB 

is 1.55 ± 0.04Vp-p.

7.  After completing the adjustments, write the data into memory by 

pressing “MUTING” Æ “ENTER” on the remote commander.

White

Black

V

WB

1.  Receive the signal.

 

TV terminal (sub)  

: Color-bar (white-75%, 7.5% setup)

 

VIDEO terminal (main)  

: Color-bar (white-75%, 7.5% setup)

2.  VIDEO MODE   

: Pro

 PICTURE 

 

: 

Maximum

 COLOR 

 

: 

Center

 

 2150P-2 1 RGBS 

: 7

3.  Set to P & P mode, and set to service mode.

4.  Connect an oscilloscope between pin 

i

 of CN5 (A board) connector 

and ground.

5.  Select “2103-1-03 SCOL, -04 SHUE” (Main), and adjust them to have 

VB1 ≤ VB4 and VB2 ≤ VB3 in the waveform levels.

6.  Select “2103-2-03 SCOL, -04 SHUE” (Sub), and adjust them to have 

VB1 ≤ VB4 and VB2 ≤ VB3 in the waveform levels.

7.  After completing the adjustments, write the data into memory by 

pressing “MUTING” Æ “ENTER” on the remote commander.

 

  

VB1      VB2     VB3     VB4

1.  Receive the signal.

 

TV terminal (main) 

: Color-bar (white-75%, 7.5% setup)

 

VIDEO terminal (sub) 

: Color-bar (white-75%, 7.5% setup)

2.  VIDEO MODE   

: Pro

 PICTURE 

 

: 

Maximum

 COLOR 

 

: 

Center

 

 2150P-2 1 RGBS 

: 7

3.  Set to P & P mode, and set to service mode.

4.  Connect an oscilloscope between pin 

i

 of CN5 (A board) connector 

and ground.

5.  Select “2103-1-03 SCOL, -04 SHUE” (Main), and adjust them to have 

VB1 ≤ VB4 and VB2 ≤ VB3 in the waveform levels.

6.  Select “2103-2-03 SCOL, -04 SHUE” (Sub), and adjust them to have 

VB1 ≤ VB4 and VB2 ≤ VB3 in the waveform levels.

7.  After completing the adjustments, write the data into memory by 

pressing “MUTING” Æ “ENTER” on the remote commander.

 

  

VB1      VB2     VB3     VB4

All capacitors are in µF unless otherwise noted. pF : µµF 50WV or less 
are not indicated except for electrolytics and tantalums.

All electrolytics are in 50V unless otherwise specifi ed.

All resistors are in ohms.  K=1000, M=1000k

Indication of resistance, which does not have one for rating electrical 
power, is as follows: 

Pitch : 5mm 

 

 

 

 

 

 

Rating electrical power : 

1

/

 4 

W

1

/

 4 

W in resistance, 

1

/

10 

W and 

1

/

 8 

W in chip resistance.

: nonfl ammable resistor.

 : fusible resistor.

 : internal component.

 : panel designation and adjustment for repair.

 : earth ground

 : earth-chassis

All variable and adjustable resistors have characteristic curve B, unless 
otherwise noted.

Readings are taken with a NTSC color-bar signal input.

Readings are taken with a 10M digital multimeter.

Voltages are DC with respect to ground unless otherwise noted.

Voltage variations may be noted due to normal production tolerances.

All voltages are in V.

S : Measurement impossibility.

: B+ line

: B-line.  (Actual measured value may be different).

: signal path. (RF)

Circled numbers are waveform references.

The components identifi ed by X in this basic schematic diagram have 
been carefully factory-selected for each set in order to satisfy regulations 
regarding X-ray radiation. Should replacement be necessary, replace 
only with the value originally used.

When replacing components identifi ed by Y, make the necessary 
adjustments as indicated.  If the results do not meet the specifi ed value, 
change the component identifi ed by X and repeat the adjustment until 
the specifi ed value is achieved. 

(Refer to adjustments in Sections 3-1 and 3-2.)

When replacing the parts listed in the table below, it is important to 
perform the related adjustments.

C8079, C8083, C8090, 
C8129, 
D8013, D8038, D8043, 
D8051, 
IC8006,
Q8021,
R8055, R8099, R8102, 
R8128, R8129,
R8131, R8139, R8140, 
R8142, R8153, R8163,
R8223, R8230,
T8004 (LOT), T8005 (FBT),
HV Block, D Board

VR8001

C8054, C8086, C8088,
C8100, C8104, C8118,
C8123, C8124, C8094
D8019, D8020, D8022,
D8028, D8036,
FB8001,
IC8008,
Q8035, Q8043,
R8035, R8043, R8159, 
R8166, R8171,
R8196, R8201,
T8004 (LOT), T8005 (FBT),
HV Block, D Board

VR8002

Part Replaced (Y)

Adjustment (X)

SR

CG

CR

G

A

CB

H2

H3

H1

V

V

D

AD

B

U

UD