V-Pin And V-Cen Adjustment; Convergence; 2-3.1. Vertical And Horizontal Static Convergence; 2-3.2. Operation Of Bmc (Hexapole) Magnet - Sony TRINITRON KV-27HS420 Service Manual

2-2. V-PIN AND V-CEN ADJUSTMENT

Preparation:
• Input a cross hatch pattern signal.
• Set Video Mode to: Standard (Reset)
• For all 4X3 CRT, VPIN data has separate register for full and V-
compress. Adjust both modes if needed.
1. Adjust service mode CXA2170D-1 05 V-CEN so that the top pin and
bottom pin are symmetrical from top to bottom.
2. Adjust service mode CXA2170D-1 06 V-PIN so that the top pin and
bottom pin are symmetrical from top to bottom.
3. Horizontal lines should be straight from left to right. Check landing for
side effect.

2-3. CONVERGENCE

Preparation:
• Set the CONTRAST and BRIGHTNESS control to standard (reset).
• Input a cross hatch pattern signal.
2-3.1. VERTICAL AND HORIZONTAL STATIC
CONVERGENCE
1. Disconnect the dynamic convergence before adjusting static
convergence (CN903), except for minor touch-up.
2. Adjust H.STAT convergence, RV9001, to converge red, green, and
blue dots in the center of the screen.
3. Connect dynamic convergence back.
4. Adjust V. STAT magnet to converge red, green and blue dots in the
center of the screen.
Center dot
RV9001
R G B
H-STAT
5. Tilt the V.STAT magnet and adjust static convergence to open or
close the V.STAT magnet.
1
KV-27HS420/29DRC420/30HS420/32HS420/34HS420/36HS420
R
G
B
V.STAT magnet
B B
G G
R R
KV-27HS420/29DRC420/30HS420/32HS420/34HS420/36HS420
2-3.2. OPERATION OF BMC (HEXAPOLE)
MAGNET
The respective dot positions result from moving each magnet interact.
Perform the following adjustments while tracking.
1. Use the BMC tabs to adjust the red, green and blue dots so that
they line up at the center of the screen (move the dots in a horizontal
direction).
HMC Correction
A < B
G
R
A
R G B
A=B
A
VMC Correction
C < D
C=D
R R
C
G
G
D
B B

2-3.3. TLH PLATE ADJUSTMENT

Preparation:
• Input a cross hatch pattern signal.
• Adjust unbalanced horizontal convergence of red and blue dots by
adjusting the TLH Plate on the defl ection yoke.
CH Board
RV9001
WY Board
R B TLH+
B R
(B)(R) TLH-
(R)(B)
1. Adjust XCV core to balance X axis.
2. Adjust the vertical red and blue convergence with V.TILT (TLV VR).
Note: Perform adjustments while tracking Item 1.
HMC Correction
A > B
B
B A
R G B
A=B
B A
VMC Correction
C < D
C=D
R
C
G
D
B
TLV
TLH Plate
XCV
G B
R
B
B
R
G
B
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