DOWNLOAD Sony KD-30XS955 Service Manual ↓ Size: 13.13 MB | Pages: 127 in PDF or view online for FREE

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 the two signals to balance the best 

condition between the two. 

 

Use the CXA2170-D1 and -D2 adjustable data items shown.

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. 

Note: Keep LANG and LBOW data between 5 and 58.

9.  Finish with UCP, LCP, PPHA, PIN adjustments. 

10. Check SLIN, MPIN. 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.

.

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)

Item 1.  HPOS (H-POSITION)

Item 2.  HSIZ (H-SIZE)

Item 5.  PIN (PIN AMP)

Item 7.  UCP (UP COR PIN COR)

Item 8.  LCP (LOW CO PIN COR)

Item 14. PPHA (PIN PHASE)

Item 15. VANG (AFC-ANGLE)

Item 16. LANG (L-ANGLE)

Item 17. VBOW (AFC-BOW)

Item 18. LBOW (L-BOW)

1.  Input a 1080i cross-hatch signal and an HD monoscope full signal 

that contains overscan markers. (From service mode, verify 1080I 
mode).

2.  If this procedure was not performed for full mode, adjust the raster 

position per Section 2-8. H Raster Center Adjustment.

3.  Adjust the geometry similar to Full DRC mode.  

Vertical size is 11.7 ± 0.1 sq. and horizontal size is 15.6 ± 0.1 sq., if 
monoscope signal is available.  Otherwise, set the Vertical size to 
91.0 ± 0.6% scan and Horizontal size as 91.0 ± 0.6% scan.

4.  Adjust HPOS as necessary.

 

Note: If necessary, touch up the geometry using the data registers 
listed above for full mode. Check NTSC full mode for adjustment side 
effects because some data registers are shared between modes, in 
which case a balance must be achieved.

5.  Write the data into memory before changing modes.

1.  Input a monoscope and crosshatch signal.

2.  Set CXA2170-P4 item 26 IDSW to 4 (VC 960i).

3.  Check for vertical compressed mode distortion. 

4.  Adjust VPIN as necessary to correct upper lower horizontal line 

straightness. Adjust other registers in Full mode above as necessary, 
being careful to balance any shared data effect between modes.

5.  Repeat steps 3 and 4 for IDSW set to 3 (VC 1080i). 

6.  Write the data before changing modes.

1.  Check Normal and Zoom modes for size and position. 

2.  Optimize VPIN adjustment in Normal mode for the straightest upper 

and lower horizontal lines. For other registers, remember to check for 
shared data side effect. 

3.  Write the data before changing modes.

4.  Check Wide Zoom mode for size and position. 

Wide Zoom is a specially adjusted mode to fi t a 4:3 picture into a 
16:9 format, and is only available on wide screen models. 

5.  Set the following key registers to the data indicated: 

VSCO = 10, UVLN = 4, LVLN = 4, SLIN = 10, MPIN = 9,
then adjust the other data registers shown here for Full mode to 
straighten horizontal and vertical lines. The picture on the top and 
bottom edge is deliberately compressed vertically, and similarly the 
picture on the left and right side is expanded horizontally. 

 

Note: Do not adjust horizontal and vertical linearity to make another 
Full mode. Most data registers for this mode are dedicated to Wide 
Zoom mode only so there should be no adjustment side effects to 
other modes but please confi rm this. 

6.  Write the data before changing modes.

Standard ....................................................................................................

135.3 ± 1 VAC

Check Condition:

  AC input voltage: 120 (± 2) VAC 

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

Initial Setting: .............................................................................................

Standard Reset condition

Confi rm Point:............................................................................................

Across CN5509 PIN 9 for B+ of DZ Board

1.  Using an external DC power supply, apply 5.3 ± 0.5 Vdc between 

Pin 2 of CN507 (jig connector) and ground (Pin 8); confi rm set goes 
to hold-down (main power relay click).

2.  Remove the external DC power supply.

Standard 

135.3 ± 1 VAC

Check Condition:

  AC input voltage: 120 (± 2) VAC 

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

Initial Setting: .............................................................................................

Standard Reset condition

Confi rm Point:............................................................................................

Across CN5509 PIN 9 for B+ of DZ Board

Standard:..........................................................................135.3  ±  1 VDC

Measurement point:

 

CN5509 pin (9) for B+ of [DZ] board

Input Video Signal:............................................................All Black Signal

Picture level:..................................................Picture/Brightness 

Minimum

HV Probe:  Service can use Fluke 80K-40 or equivalent.

Standard:............................................................................32.5  ±  0.5 kV

Measurement point:............................................................Anode of CRT

Input Video Signal:............................................................All Black Signal

Picture level:..................................................Picture/Brightness Minimum

1.  Remove DZ board screws and carefully lift board as necessary to 

gain access to the bottom of the board.

2.  Unsolder CN5001 pin 1 to open ABL connection to AZ board.

 

(Alternately, open AZ - DZ connector (CN509-CN5001) and carefully 
push pin 1 metal tab (ABL) up from the bottom and pull up from the 
top using long nose pliers and release it from the connector, then 
close the connector with pin 1 connection now open.)

3.  Install jumper wire from MZ board connection CN2304 pin 1 to CN509 

pin 1 to inject 5V to ABL line. (Alternately, use STBY 5V, IC501 Pin O 
on AZ board)

4.  Unsolder CN5009 pin 8 (H-prot).

5.  Open ABL pin 1 of T8001 (RHT) on DZ board and connect analog 

current meter.

Input Video Signal:............................................................All Black Signal

Picture level:..................................................Picture/Brightness Minimum

1.  Confi rm ABL current which should be approximately 0.160mA.

2.  Short across C8002, C8021, and C8052.

3.  Turn off the set and install precision VR1 jig (a multi turn pot initially 

set to 100K) to IC8005 pin 1 (It’s the unmarked IC8005 pin on PWB A 
side, neither K nor A.) and GND (C8076 -).

4.  Restore power and adjust HV to obtain 36.4 ± 0.15kV by precision 

VR1 jig.

 

Note: If the picture turns bright red or other color and the set shuts 
down, place a 10 M  resistor on the CX board between G2 and E2 
pins on the socket. Confi rm G2 adjustment before returning set to 
production.

5.  Remove short from C8002 and confi rm that hold down activates.

6.  Short C8002 again and confi rm that HV recovers.

7.  Re-adjust HV to obtain 33.5 ± 0.2 kV by precision VR1 jig.

8.  Remove short from C8002 and C8021 and C8052.

9.  Confi rm that hold down does not activate.

Note: Remove the 10 M  resistor , if installed in step D above

Input Video Signal:............................................................All White Signal

Picture level:..............................................Picture/Brightness Adjustment

1.  Short across C8002, C8021, C8052, C8012, and C8015.  

2.  Set ABL current to 2.76mA by adjusting picture and brightness 

 

towards max condition. 

3.  Adjust HV to obtain 35.7 ± 0.15kV by precision RV1 jig.

4  Remove short from C8002 and confi rm that hold down activates.

5.  Short C8002 again and confi rm that HV recovers.

6.  Re-adjust HV to obtain 32.2 

± 0.2 kV by precision VR1 jig.

7.  Remove shorts from C8002, C8021, and C8052.

8.  Confi rm that hold down does not activate.

9.  Remove short from C8012 and C8015.

10. Remove VR1 jig from DZ board

Input Video Signal:............................................................All White Signal

Picture level:...............................................Picture/Brightness Adjustment

1.  Short across C8015.

2.  Set ABL current to 2.76mA by adjusting picture and brightness 

 

towards max condition.

3.  Confi rm that AC Relay shuts off.

4.  Remove short from C8015 and Short across C8012.

5.  Turn the set off and on to reset AC relay latch.

6.  Confi rm the voltage at CN5009 pin 8 (H_prot) = 3.6 ± 0.5V.

7.  Remove short from C8012.

1.  Using an external DC power supply, apply 5.3 + 0.5 Vdc

 

 between Pin 2 of CN507 (jig connector) and ground (Pin 8) on 
AZ board.

2.  Confi rm that hold down activates.

3.  Remove the external DC power supply.

1.  Re-solder CN5001 pin 1 and CN5009 pin 8 to restore AZ -DZ 

connections. 
(Or as applicable, restore AZ –DZ connector by carefully pressing the 
tab back into the slot and snapping the connector shut.  Be sure the 
tab is fl ush and level with the other tabs on the connector.)

2.  Remove jumper wire from MZ board connection CN2304 pin 1 to 

CN509 pin 1. 

3.  Remove current meter from ABL pin and restore ABL pin connection.

4.  Replace all DZ board screws and restore user menu settings to reset 

condition.