Sony KD-34XBR2 Service Manual ▷ View online
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KD-34XBR2
7-5. RF SUB-CONTRAST ADJUSTMENT
SET-UP CONDITION:
Picture mode: PRO
Color: Minimum
Picture: Maximum
Display mode: TWIN mode (P&P)
Picture mode: PRO
Color: Minimum
Picture: Maximum
Display mode: TWIN mode (P&P)
INITIAL DATA:
Cat. 2150P-1, item #4 “RDRV”, data = 45.
Cat. 2150P-1, item #7 “RCUT”, data = 41.
Cat. 2150P-1, item #4 “RDRV”, data = 45.
Cat. 2150P-1, item #7 “RCUT”, data = 41.
PROCEDURE:
1. With set turned off, connect an oscilloscope to pin # 1 (R) of CN9001
1. With set turned off, connect an oscilloscope to pin # 1 (R) of CN9001
on the C-board.
2. Enter the service mode.
3. Display a color bar pattern through an RF (tuner) input.
4. Select adjustment category “2150P-2”, item # 1 “RGBS”, and change
the data from 7 to 4 (this turns off the blue and green).
5. Select adjustment category “2103-1”, item # 2 “SCON” (for the left side
picture) and “2103-2”, item # 2 “SCON” (for the right side picture), and
change the data so that the voltage difference between the peak white
level and black level is 2.25 V +/- 0.05 V for 100 IRE color bars, or 1.7
V +/- 0.05 V for 75 IRE color bars.
change the data so that the voltage difference between the peak white
level and black level is 2.25 V +/- 0.05 V for 100 IRE color bars, or 1.7
V +/- 0.05 V for 75 IRE color bars.
Black
VR2
VR1
White
100 IRE color bars
VR1 – VR2 =
VR1 – VR2 =
∆
VR = 2.25 V
±
0.05 V
p-p
75 IRE color bars
VR1 – VR2 =
VR1 – VR2 =
∆
VR = 1.7 V
±
0.05 V
p-p
50mv/div.
5uS/div.
5uS/div.
6. Write the data to memory.
7. Select adjustment category “2150P-2”, item # 1 “RGBS”, and change
7. Select adjustment category “2150P-2”, item # 1 “RGBS”, and change
the data from 4 to 7 (this turns the blue and green on).
This completes the RF sub-contrast adjustment.
7-6. ANALOG VIDEO SUB-COLOR AND SUB-
HUE ADJUSTMENT
HUE ADJUSTMENT
SET-UP CONDITION:
Picture mode: PRO
Color: Factory default (press the RESET button while in PRO mode
adjustment menu).
Picture: Maximum
Display mode: TWIN mode (P&P)
Picture mode: PRO
Color: Factory default (press the RESET button while in PRO mode
adjustment menu).
Picture: Maximum
Display mode: TWIN mode (P&P)
INITIAL DATA:
Cat. 2150P-1, item #4 “RDRV”, data = 45.
Cat. 2150P-1, item #7 “RCUT”, data = 41.
Cat. 2150P-1, item #4 “RDRV”, data = 45.
Cat. 2150P-1, item #7 “RCUT”, data = 41.
PROCEDURE:
1. With set turned off, connect an oscilloscope to pin # 5 (B) of CN9001
1. With set turned off, connect an oscilloscope to pin # 5 (B) of CN9001
on the C-board.
2. Enter the service mode.
3. Display a color bar pattern through an RF (tuner) input.
4. Select adjustment category “2103-1”, item # 3 “SCOL” for the left side
picture, and “2103-2”, item # 3 “SCOL” for the right side picture, and
adjust the data so that VB1 and VB4 in the waveform meets the spec.
shown below.
adjust the data so that VB1 and VB4 in the waveform meets the spec.
shown below.
5. Select adjustment category “2103-1”, item # 4 “SHUE” for the left side
picture, and “2103-2” item # 4 “SHUE” for the right side picture, and
adjust the data so that VB2 and VB3 in the waveform meets the spec.
shown below.
adjust the data so that VB2 and VB3 in the waveform meets the spec.
shown below.
VB1 VB2 VB3 VB4
SCOL: VB1
≤
VB4 (=VB1 + 0 ~ 90mV)
SHUE: VB2
≤
VB3 (=VB2 + 0 ~ 90mV
50mv/div.
5uS/div.
5uS/div.
6. Write the data to memory.
This completes the RF sub-color and sub-hue adjustment.
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KD-34XBR2
8-1. WHITE BALANCE ADJUSTMENT
SET-UP CONDITION:
Picture mode: PRO mode at factory default (press the RESET button
while in PRO mode adjustment menu), then set COLOR to 50%.
Picture mode: PRO mode at factory default (press the RESET button
while in PRO mode adjustment menu), then set COLOR to 50%.
PROCEDURE:
1. Select the video-1 input.
1. Select the video-1 input.
2. Enter the service mode.
3. Set the following initial data:
Device Name
Adj. Item #
Name
Data
2150P-1
4
RDRV
45
2150P-1
7
RCUT
41
2150P-1
1
CBOF
34
2150P-1
2
CROF
32
2103-1
20
CBOF
34
2103-1
21
CROF
32
2103-2
20
CBOF
33
2103-2
21
CROF
33
4. Display a gray-scale pattern (or color bars with the chroma turned
off) and closely observe the 2 darkest gray bars (not including the
black bar).
black bar).
5. Display a white raster again, and adjust the pattern generator’s output
level so that raster level is in the middle of the level of the 2 darkest
gray bars observed in the previous step.
gray bars observed in the previous step.
6. Alternately adjust category 2150P-1 items # 8 “GCUT” and 9 “BCUT”
to obtain the purest gray (no color tint). Use the center area of the
screen to make your judgment.
screen to make your judgment.
7. Write the data to memory.
8. Display a 480i (NTSC) white raster through the video-1 input.
9. Alternately adjust category 2150P-1 items # 5 “GDRV” and 6 “BDRV”
to obtain the purest white (no color tint). Use the center area of the
screen to make your judgment.
screen to make your judgment.
10. Write the data to memory.
11. Alternately repeat steps 6 through 9 until the dark gray and white
rasters do not show any evidence of color tinting.
12. Write the data to memory.
13. Change the set from the video-1 mode to the DTV mode as follows:
a) Turn the set on and select the VHF-UHF antenna.
b) Tune the TV to channel 2.1 (“two point one” not “twenty one”). Use
the decimal point button on the remote. It’s OK if there is no signal
on channel 2.1.
the decimal point button on the remote. It’s OK if there is no signal
on channel 2.1.
c) Turn the TV off.
d) Enter the service mode.
14. Change white balance offset data for the DTV mode as follows:
Device Name
Adj. Item #
Name
Data
2150P-1
1
CBOF
26
2150P-1
2
CROF
26
15. Write the data to memory.
16. Change the set from DTV mode to TWIN (P&P) mode.
17. Change white balance offset data for the TWIN mode as follows:
Device Name
Adj. Item #
Name
Data
2150P-1
1
CBOF
36
2150P-1
2
CROF
36
18. Write the data to memory.
19. Change the set from TWIN mode to video-5 mode. An input signal
is not necessary.
SECTION 8. WHITE BALANCE, SUB-BRIGHTNESS AND G2 ADJUSTMENTS
Perform White Balance and Sub-brightness adjustments as necessary. Perform G2 adjustment whenever the CRT or D-board is replaced,
and whenever tinting or faint lines are seen in all-black areas of the screen.
and whenever tinting or faint lines are seen in all-black areas of the screen.
Required equipment:
NTSC generator with white raster and gray-scale pattern (color bar pattern with chroma turned off is OK).
NTSC generator with white raster and gray-scale pattern (color bar pattern with chroma turned off is OK).
NOTE: Throughout these adjustment procedures you will be instructed to “Write the data to memory”. To do this, follow this procedure:
1. Press the “MUTE” button (“WRITE” appears in green letters at the top right corner of the screen).
2. Press the “ENTER” button (“WRITE” changes from green to red, then “WRITE” changes to “SERVICE”).
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KD-34XBR2
20. Change white balance offset data for the video-5 mode as follows:
Device Name
Adj. Item #
Name
Data
2150P-1
1
CBOF
36
2150P-1
2
CROF
36
2103-1
20
CBOF
36
2103-1
21
CROF
38
21. Write the data to memory.
22. Change the set from video-5 mode to video-6 mode. An input signal
is not necessary.
23. Change white balance offset data for the video-6 mode as follows:
Device Name
Adj. Item #
Name
Data
2103-1
20
CBOF
32
2103-1
21
CROF
32
24. Write the data to memory.
This completes the white balance adjustment.
8-2. SUB-BRIGHTNESS ADJUSTMENT
SET-UP CONDITION:
Picture mode: PRO mode at factory default (press the RESET button
while in PRO mode adjustment menu), then set PICTURE to minimum.
Picture mode: PRO mode at factory default (press the RESET button
while in PRO mode adjustment menu), then set PICTURE to minimum.
The room must be dark.
PROCEDURE:
1. Enter the service mode.
1. Enter the service mode.
2. Select the video-1 input with no signal applied so that the screen is
black (except for the on-screen display).
3. Set the sub-bright offset data as follows:
Device Name
Adj. Item #
Name
Data
2150P-1
11
SBOF
7
4. Adjust the sub-bright data so that there is no light output from the CRT
in the black areas of the screen.
Device Name
Adj. Item #
Name
Data
2150P-1
3
SBRT
*
* Adjust as necessary.
5. Write the data to memory.
This completes the sub-brightness adjustment.
SET-UP CONDITION:
Display mode: FULL (NTSC)
Display mode: FULL (NTSC)
Picture mode:STANDARD (enter the STANDARD mode adjustment menu
from the user menu, then press the RESET button on the remote
control to set the STANDARD settings to the factory settings).
control to set the STANDARD settings to the factory settings).
PROCEDURE:
1. Select an unused input so that the screen is black except for the
1. Select an unused input so that the screen is black except for the
on-screen display.
2. Make the room as dark as possible.
3. Turn G2 RV9002 on the C-board clockwise until a slight glow is seen in
the black areas of the screen.
4. Turn G2 RV9002 on the C-board counter-clockwise until the glow
disappears and the black areas have no light output.
This completes the G2 adjustment.
8-3. G2 ADJUSTMENT
Perform this adjustment whenever the CRT or D-board is replaced,
and whenever tinting or faint lines are seen in all-black areas of
the screen.
and whenever tinting or faint lines are seen in all-black areas of
the screen.
C BOARD
RV9002
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KD-34XBR2
Is RHT
Changed?
Is D-Board
Replaced?
Replace RV8001 and RV8002 with the same value:
HV project adjust and inspection
HV project adjust and inspection
1. Turn RV8001 fully counter-clockwise.
2. Turn set on with black video signal then adjust
2. Turn set on with black video signal then adjust
RV8002 slowly to obtain
34.8 kV.
3. Adjust RV8001 clockwise slowly until hold down
protect just activates.
4. Adjust RV8002 clockwise, then turn the set on.
Change video to white field then slowly turn RV8002
counter-clockwise to get 34.8 ± 0.2kv. Confirm set
does NOT TURN OFF at this condition. If yes, then
repeat from step 1 again.
counter-clockwise to get 34.8 ± 0.2kv. Confirm set
does NOT TURN OFF at this condition. If yes, then
repeat from step 1 again.
5. Finally, set back RV8002 to 31.50kv + 0.2kv at video
cut off (black video).
Start
No
Yes
Change any
or
marked parts
Yes
No
Yes
No
Yes
Is +B, Vd and
hold down
confirmed?
Finish for
hold-down
check
Start from
the beginning.
Confirm +B, Vd and check hold-down on the D board
video with no signal (standard reset mode) as follows:
1. Confirm +B across C6544 to make sure that it is
video with no signal (standard reset mode) as follows:
1. Confirm +B across C6544 to make sure that it is
135.3 ± 1 Vdc.
2. Confirm Vd at pin 2 CN6506 or at TP-Vd for 4.3V <
Vd < 4.65 Vdc.
3. Apply 5.5 + 0.5 Vdc at pin 2 of CN6506, then confirm
that set holds down.
If all adjustments are complete, then seal and secure
RV8001 and RV8002 with epoxy to prevent any possible
misadjustment by non-trained technical service.
SECTION 9: SAFETY RELATED ADJUSTMENTS
X RV8001, RV8002 CONFIRMATION METHOD AND HV SERVICE ADJUSTMENTS
HV SERVICE FLOWCHART
B+ MAX CONFIRMATION
Standard............................................................................ 135.3 ± 1 VDC
Check Condition:
AC input voltage: ........... 120 (± 2) VAC at Board Adjustment Process
Check Condition:
AC input voltage: ........... 120 (± 2) VAC at Board Adjustment Process
................................................ 130 (± 2) VAC at QC
... 120 (± 2) VAC at Overall Adjustment (after aging)
Note: If using a stabilized power supply, make sure that the
distortion factor is 3% or less.
Setting mode: ............................................................................ Full mode
Signal input:.................................................. Cross-hatch of NTSC at QC
Initial setting:...........................................................Reset condition at QC
Confi rm point: .........................................Across C6544 for B+ of D Board
Signal input:.................................................. Cross-hatch of NTSC at QC
Initial setting:...........................................................Reset condition at QC
Confi rm point: .........................................Across C6544 for B+ of D Board
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