Sony KV-27HS420 (serv.man2) Service Manual ▷ View online
30
KV-27HS420/29DRC430/30HS420/32HS420/34HS420
KV-27HS420/29DRC430/30HS420/32HS420/34HS420
2-5. SCREEN (G2)
1. Input composite white fi eld into Video 1.
2. Set to service mode and adjust as follows:
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VR2
VR1
VR
(27HS/29DRC) = 1.84 ± 0.05 Vpp
(30HS) = 1.92 ± 0.05 Vpp
(32HS) = 1.92 ± 0.05 Vpp
(34HS) = 1.92 ± 0.05 Vpp
4. Write data from Step 3 above, into memory.
2-6. PICTURE QUALITY ADJUSTMENTS
Preparation:
• Set
• Set
PRO
MODE
(Reset).
1. Input signal (480i Composite):
• Color Bar Video 75 IRE (White) 75% modulation 7.5% Set-up.
• Color Bar RF 75 IRE (White) 75% modulation 7.5% Set-up.
2-6.1. VIDEO INPUT - SUB CONTRAST
ADJUSTMENT
Preparation:
• Input a Color Bar signal to VIDEO 1 (75 IRE 75%).
• Input a Color Bar signal to VIDEO 1 (75 IRE 75%).
• Set picture mode: Single (Full) (PRO MODE Reset).
• Picture:
Max
• Color:
Min
1. Set to Service Mode and adjust as follows:
NO. Name
Control Function
Avg. Data
01 RGBS
R ON
4
2170P-2
2. Connect oscilloscope to Pin 1 of CN9001 (R.DRV) on the CH Board.
3. Adjust contrast according to the service mode item: SPIO.
NO. Name
Control Function
02 SCON
SUB-CONT
2103-1
31
KV-27HS420/29DRC430/30HS420/32HS420/34HS420
KV-27HS420/29DRC430/30HS420/32HS420/34HS420
2-6.2. VIDEO INPUT - SUB HUE/SUB COLOR
ADJUSTMENT
Preparation:
• Input a Color Bar signal to VIDEO 1 (75 IRE 75%).
• Input a Color Bar signal to VIDEO 1 (75 IRE 75%).
• Set picture mode: Single (Full) (PRO MODE Reset).
• Picture:
Max
1. Set to Service Mode and adjust as follows:
NO. Name
Control Function
Avg. Data
01 RGBS
R ON
4
2170P-2
2. Connect an oscilloscope to Pin 5 of CN9001 (B. DRV) on the CH
Board.
3. Adjust color according to Service Mode for SCLO.
4. Adjust color according to Service Mode for SHUO.
NO. Name
Control Function
03 SCOL
SUB-COL
04 SHUE
SUB-HUE
2103-1
VB4
VB3
VB2
VB1
COLOR: VB1 < VB4 (=20mV ± 200 mV)
HUE: VB2 < VB3 (=20mV ± 200 mV)
5. Write data into memory.
2-6.3. RF INPUT - SUB CONTRAST
ADJUSTMENT
Preparation:
• Input a Color Bar signal to RF (75 IRE 75%).
• Input a Color Bar signal to RF (75 IRE 75%).
• Set picture mode: Single (Full) (PRO MODE).
• Picture:
Max
• Color:
Min
1. Set to Service Mode and adjust as follows:
NO. Name
Control Function
Avg. Data
01 RGBS
R ON
4
2170P-2
2. Connect an oscilloscope to Pin 1 of CN9001 (R. DRV) on the
CH Board.
3. Adjust contrast according to service mode for SCON.
NO. Name
Control Function
02 SCON
SUB-CONT
2103-1
white
black
GND
VR2
VR1
VR
(27HS/29DRC) = 1.84 ± 0.05 Vpp
(30HS) = 1.92 ± 0.05 Vpp
(32HS) = 1.92 ± 0.05 Vpp
(34HS) = 1.92 ± 0.05 Vpp
4. Write data from Step 3 above, into memory.
7
32
KV-27HS420/29DRC430/30HS420/32HS420/34HS420
KV-27HS420/29DRC430/30HS420/32HS420/34HS420
2-6.4. RF INPUT - SUB HUE/SUB COLOR
ADJUSTMENT
Preparation:
• Input a Color Bar signal to RF (75 IRE 75%).
• Input a Color Bar signal to RF (75 IRE 75%).
• Set picture mode: single (FULL) (PRO MODE Reset).
• Picture:
Max
1. Set to Service Mode and adjust as follows:
NO. Name
Control Function
Avg. Data
01 RGBS
R ON
7
2. Connect an oscilloscope to pin 5 of CN9001 (B. DRV) on the CH
Board.
3. Adjust color according to Service Mode for SCOL.
4. Adjust color according to Service Mode for SHUE.
NO. Name
Control Function
03 SCOL
SUB COLOR
04 SHUE
SUB HUE
2103-1
VB4
VB3
VB2
VB1
COLOR: VB1 < VB4 (=20mV ± 200 mV)
HUE: VB2 < VB3 (=20mV ± 200 mV)
5. Write data into memory.
2-7. WHITE BALANCE (CRT) AND SUB
BRIGHT ADJUSTMENT
Preparation
• Input an all white 480I (15.734 KHz) signal into the VIDEO 1 input
• Input an all white 480I (15.734 KHz) signal into the VIDEO 1 input
terminal to perform the White Balance (highlight, cut-off) adjustments.
The parameters to adjust are in the CXA2170P1 in Service Mode.
The parameters to adjust are in the CXA2170P1 in Service Mode.
• Set Picture Mode: Single (FULL) ( PRO MODE Reset)
• Picture:
Max
• Color:
Min
2170P-4
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2-7.1. COLOR OFFSET ADJUSTMENT
PROCEDURE
Preparation:
• Input an all white (30 IRE) signal to the specifi ed input.
• Input an all white (30 IRE) signal to the specifi ed input.
• Adjust the white balance using the specifi ed registers.
• Set picture mode: Single (FULL) (PRO MODE Reset)
• Color:
Max
VIDEO 1
CXA2170P1
NO.
Name
Control Function
3
CBOF
CB OFFSET
4
CROF
CR OFFSET
VIDEO 5
CXA2170P1
NO.
Name
Control Function
3
CBOF
CB OFFSET
4
CROF
CR OFFSET
VIDEO 7 -
CXA2170P1
NO.
Name
Control Function
3
CBOF
CB0F (FROM VIDEO 5) + 3
4
CROF
CR0F (FROM VIDEO 5) - 4
HDMI 480i Signal
33
KV-27HS420/29DRC430/30HS420/32HS420/34HS420
KV-27HS420/29DRC430/30HS420/32HS420/34HS420
2-8. H RASTER CENTER ADJUSTMENT
Preparation:
• Input a monoscope signal.
• Input a monoscope signal.
• Set to NTSC (DRC) mode.
1. Set to Service Mode and adjust as follows:
NO. Name
Control Function
Data
05 AGNG
AGING 1, AGING 2
2
NO. Name
Control Function
Avg. Data
02 HSIZ
Horiz Size
34
01 HPOS
Horiz Position
34
NO. Name
Control Function
Avg. Data
00 HBLK
Blanking Enable
0
CXA2170P-2
CXA2170D-2
CXA2170D-3
2. Reduce HSIZ to see sides of raster. (See Figure A)
3. Adjust H-Center with CXA2170D-2.
4. Adjust to the best screen position with H-CENT and write data.
5. Restore aging, HSIZ and HBLK to original condition.
Raster Edge Equal:
RASTER
EDGES
EDGES
RASTER
Figure A
2-9. PICTURE DISTORTION ADJUSTMENTS
2-9.1. NTSC (DRC) FULL MODE
ADJUSTMENT
1. Face the picture tube in an east-west direction. (For best condition.)
2. Input a monoscope and crosshatch signal.
3. Adjust the picture distortion with these two signals to balance the best
condition between the two.
Use the CXA2170-D1 and -D2 adjustable data items shown here.
4. Complete V-PIN and V-CEN adjustments fi rst and adjust HPTZ to
straighten and parallel top and bottom lines.
5. Adjust VSCO, VLIN as necessary.
6. Adjust VSIZ and VPOS and write the data.
7. Adjust for Vertical line distortion.
8. Adjust VANG, VBOW, LANG, LBOW. Keep LANG and LBOW data
between 5 and 58.
9. Finish with UCP, LCP, PPHA, PIN adjustments. Check SLIN, MPIN.
10. Adjust for correct HSIZ and HPOS and write the data before
changing modes.
Note: Make sure that the picture size is within specs. Vertical size is
11.8 ± 0.1 sq. and horizontal size is 15.8 ± 0.1 sq.
11.8 ± 0.1 sq. and horizontal size is 15.8 ± 0.1 sq.
.
CXA2170D-1
Item 0. VPOS (V-POSITION)
Item 1. VSIZ (V-SIZE)
Item 3. VLIN (V-LINEARITY)
Item 4. VSCO (V S-CORRECTION)
Item 9. HTPZ (H-TRAPEZOID)
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