Read Sony KV-SZ25M50 (serv.man2) Service Manual online
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KV-SZ25M50
RM-GA002
3-3. PICTURE QUALITY ADJUSTMENT
3-3-1. P MAX / CONTRAST ADJUSTMENT
1. Set TV to Video mode.
2. Set Picture mode to “CUSTOM”.
3. Input PAL 100% Color Bar to TV set (OTHER model)
2. Set Picture mode to “CUSTOM”.
3. Input PAL 100% Color Bar to TV set (OTHER model)
and NTSC 75% Color Bar (NTSC model).
4. Set the following condition:
Picture 100%, Color 0%, Brightness 50%.
5. Connect an oscilloscope to pin 4 (R output) of CN004.
6. Go to service mode and set PICT 003 “PWL” to 00h,
6. Go to service mode and set PICT 003 “PWL” to 00h,
WHBL 017 “BLBG” to 01h and PICT 002 “SOC” to 03.
7. Select SADJ 000 “PMAX” with 1 and 4 button of the
commander then adjust VR with spec with 3 and 6
button until reach the spec below:
button until reach the spec below:
8. Then copy the adjusted PMAX data to TV mode.
9. Select Wide mode to “ON” in TV and Video mode and
9. Select Wide mode to “ON” in TV and Video mode and
write “PMAX” data -6 steps
(for models with V-Compression features only).
(for models with V-Compression features only).
10. Press [MUTING]
t - to write the data.
11. Set “PWL” and “BLBG” back to initial data.
(“PWL” : 01h, “SOC” and “BLBG” : 00h).
12. Finally press [MUTING]
t - to write the data.
3-3-2. SUB COLOR ADJUSTMENT
1. Set TV to Video mode.
2. Set Picture mode to “CUSTOM”.
3. Input PAL 100% Color Bar to TV.
4. Set the following condition:
2. Set Picture mode to “CUSTOM”.
3. Input PAL 100% Color Bar to TV.
4. Set the following condition:
Picture 100%, Color 50%, Brightness 50%, Hue 50%
and Sharpness 50%
and Sharpness 50%
5. Set PICT 006 “WTS” to 00h.
6. Connect an oscilloscope to pin 2 (B output) of CN004 A
6. Connect an oscilloscope to pin 2 (B output) of CN004 A
Board.
7. Select SADJ 004 “SCOL” with 1 and 4 button of the
commander then adjust with 3 and 6 so that
VB2=VB3=VB4 (for PAL) then write in the data as below:
VB2=VB3=VB4 (for PAL) then write in the data as below:
Add 11 steps to “SCOL” (PAL) – 25"
Add 11 steps to “SCOL” (PAL) – 29"
Add 6 steps to “SCOL” (PAL) – 34"
Add 11 steps to “SCOL” (PAL) – 29"
Add 6 steps to “SCOL” (PAL) – 34"
8. Copy “SCOL” 50(PAL) video data to “SCOL” 50 (SECAM)
video.
9. Then copy “SCOL” 50(PAL) video data and “SCOL”
50(SECAM) video data to “SCOL” 50(PAL) and “SCOL”
50(SECAM) TV table.
50(SECAM) TV table.
10. For NTSC model input NTSC 75% Color Bar to TV and
repeat step no. 4 to 6.
11. Select SADJ 004 “SCOL” with 1 and 4 button of the
commander then adjust using 3 and 6 so that
VB1=VB4 then write in the data as below:
VB1=VB4 then write in the data as below:
Add 11 steps to SCOL (NTSC) – 25"
Add 11 steps to SCOL (NTSC) – 29"
Add 6 steps to SCOL (NTSC) – 34"
Add 11 steps to SCOL (NTSC) – 29"
Add 6 steps to SCOL (NTSC) – 34"
12. Copy “SCOL” 60(NTSC) video data to “SCOL” 60(NTSC)
TV .
13. Finally copy “SCOL” 50(PAL) and “SCOL” 60(NTSC) data
to “SCOL” 50(PAL) and 60(NTSC) in DVD mode.
14. Then press [MUTING]
t - to write the data.
15. Set PICT 006 “WTS” back to original data.
3-3-3. SUB HUE ADJUSTMENT
(Except US/Latin model)
1. Set TV to Video mode.
2. Input NTSC 3.58 Color Bar to TV set.
3. Set the following condition:
2. Input NTSC 3.58 Color Bar to TV set.
3. Set the following condition:
Picture 100%, Color 50%, Brightness 50%, Hue 50%,
Sharpness 50%.
Sharpness 50%.
4. Connect oscilloscope to pin 2 (B output) of CN004.
5. Set to service mode and select SADJ 001 “SHUE” and
5. Set to service mode and select SADJ 001 “SHUE” and
YC 013 “TINT” with 1 and 4 button then adjust to
VB1=VB2=VB3=VB4 using 3 and 6 button.
VB1=VB2=VB3=VB4 using 3 and 6 button.
6. Press [MUTING]
t - to write the data.
7. Select TV channel with NTSC 3.58 and perform step 3
to 6.
8. For single system model with NTSC 4.43, select TV
channel with NTSC 4.43 and perform step 3 to 6.
9. Once adjustment is completed in Video mode, carry out
adjustment in DVD mode. Input NTSC 3.58 Color Bar.
10. Connect oscilloscope to pin 2 (B output) of CN004.
11. Set to service mode and adjust service item YC 013
11. Set to service mode and adjust service item YC 013
“TINT” with 1 and 4 button until VB1=VB2=VB3=VB4.
12. Press [MUTING]
t - to write the data.
Illustration 1
The highest level of VB1, VB2, VB3 and VB4 should
be aligned at the same line.
The ideal difference between VB2 and VB3 is within + 80mV.
VR
Black
VR
PAL
34"
29"
2.48
2.20
25"
NTSC
1.85 0.03Vpp
2.00 0.03Vpp
1.88 0.03Vpp
VB2 = VB3 = VB4 (for PAL)
VB1
VB2 VB3 VB4
VB1 = VB4 (for NTSC)
(Difference is within 70mV)
VB1 VB2 VB3 VB4
VB1
VB2
VB3 VB4
80mV
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