Philips 27G7 Service Manual page 41

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 Left/Right keys to select Green (G), and use the Menu Up/Down keys to set Green to
maximum.
7. Proceed to the White Balance Setup.
Master Screen (VG2)/ White Balance Setup:
1. With the set OFF, rotate VG2 counter clockwise.
2. Power 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 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, at the junction of resistors 3833 and
3834 on the CRT Board. 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.
2. Adjust VG2 midway between top and bottom compression.
3. Proceed to WHITE-TONE Adjustments under ALIGNMENTS in the Service Alignment Mode to complete
White Balance Setup.
Fig. 3a Fig. 3b
Fig. 4a Fig. 4b
Fig. 3c
Fig. 4c