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Dynamic Edge Convergence Adjustment
(Display Figures 3a, 3b, 3c, 4a, 4b, & 4c of Wedge Placement Graphic)
Note: To secure the correct position of the deflection yoke, three rubber wedges are used. They are
ultimately to be placed as shown in Figure 3c or Figure 4c.
1. Apply a crosshatch pattern to the antenna/cable input terminal.
2. Use the Menu Up/Down keys to select Normal Green, and use the Menu Left key to set Normal
Green to minimum.
3. Tilt the yoke up and down to converge the red and blue vertical lines at the 6:00 and 12:00 positions
and the red and blue horizontal lines at the 3:00 and 9:00 positions (refer to Figure 5). When the
correct position has been found, place a rubber wedge between the yoke and the CRT. If the yoke is
tilted up, place wedge one as shown in Figure 3a; if it is tilted down, place wedge one as shown in
Figure 4a.
4. Tilt the yoke to the left and right to find the point of best possible convergence of the red and blue
lines at the edges, top and bottom of the screen as shown in Figure 6. When the correct position is
located, place wedges two and three as shown in Figure 3b or Figure 4b.
5. Remove wedge one and place it in the final position as shown in Figure 3c or Figure 4c.
6. Use the Menu Up/Down keys to select Normal Green, and use the Menu Right key to set Normal
Green to maximum.
7. Proceed to the White Balance Setup.
(Display Figures 3a, 3b, 3c, 4a, 4b, & 4c of Wedge Placement Graphic)
(Display Figures 5 &6 of Yoke Tilt Graphic)
Master Screen (VG2)/ White Balance Setup:
1. With the set OFF, rotate VG2 (located on the lower part of the flyback transformer) counter clockwise.
2. Use the Power Button (on the remote control or the local keyboard) to turn the set ON, without a
signal, and rotate VG2 clockwise until snow is visible.
3. Enter Service Alignment Mode (refer to Service Alignment Mode section).
4. Enter the Virtual Customer Menu by pressing the Menu button on the remote and set brightness and
picture to 31 and color to 0.
5. Apply an NTSC color bar signal to the antenna/cable input terminal and tune to the active channel.
6. Connect an oscilloscope, 20V per division and 10 uSec time base, to pin 6 of the CRT Socket.
Observe the stairstep pattern while adjusting VG2.
Hint: Counter clockwise adjustment will compress bottom of stairstep pattern. Clockwise adjustment will
compress top of stairstep pattern.
7. Adjust VG2 midway between top and bottom compression.
8. Proceed to White-Tone Adjustments under White Tone sub-menu in the Service Alignment Mode
section to complete White Balance Setup.
Customer Service Mode (CSM)
1. The Customer Service Mode (CSM) is used to retrieve data on the TV operation settings and stored
error codes.
2. To enter the Customer Service Mode, press and hold the Mute button on the remote control and any
key on the local keyboard (except "Power") for more than 4 seconds. When the set is in Customer
Service Mode, the text "CSM" is displayed in the top right corner of the screen.
3. To use this system, the customer is instructed to enter CSM and read off the display that appears.
This information is useful to gain insights into failures before traveling to the customer's home.
4. This information can also be used to avoid nuisance trips to the home when the problem is an
operational error (example: Closed Caption is on or set is in Hospital Mode).
5. When entering CSM, all disruptive functions are turned off, and service unfriendly modes are ignored.
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