Philips TC5.1L Service Manual page 16

EN 16 8. TC5.1L CB
8.4 Screen & Focus Voltage Adjustment
1. Apply the test pattern signal in normal status.
2. Enter the Factory mode
3. Press the "TV/AV" button to stop the vertical scan (Note:
the RC/GC/BC is preset to 80, GD/BD to 40)
4. Adjust the SCREEN potentiometer on the line output
transformer in such a way the horizontal line is just visible
on the screen.
5. Measure the VG2 voltage with a High Voltage Meter and a
High Voltage Test stick (1000:1). The VG2 voltage should
be 675 ±50 V.
6. Turn on the vertical output, and adjust the "FOCUS"
potentiometer on the line output transformer in such a way
the focus is maximized. The "FOCUS" voltage should be
within the range of 7 - 8.0 kV.
8.5 White Balance Adjustment (NORMAL)
Normal color temperature adjustment.
1. In Rich Status, choose a
AV input (Color Temperature = normal).
2. Adjust Brightness & Contrast until at the grey side Y = 5 ±1
Nits and at the white side Y = 85 ±10 Nits.
3. Use color analyzer to measure the grey side of the screen.
By adjusting the value of RC, GC and BC, set the reading
of the color analyzer x = 274 ±8 and y = 280 ±8.
4. Use color analyzer to measure the white side of the screen.
By adjusting the GD and BD, set the reading of the color
analyzer to x = 274 ±8 and y = 280 ±8.
5. Repeat steps 2 to 4 until the reading of the color analyzer
is correct on both grey and white picture.
Cool color temperature adjustment.
1. In Rich status, choose a
AV input (Color Temperature = cool).
2. Adjust RC-C, GC-C, BC-C, GD-C and BD-C as described
in 2, 3, 4 and 5 of the "Normal color temperature
adjustment" procedure until you have reached a reading on
the color analyzer of x = 263 ±8 and y = 265 ±8.
Warm color temperature adjustment.
1. In Rich status, choose a
AV input (Color Temperature = warm).
2. Adjust RC-W, GC-W, BC-W, GD-W and BD-W as
described in 2, 3, 4 and 5 of the "Normal color temperature
adjustment" procedure until you have reached a reading on
the color analyzer of x = 291 ±8 and y = 300 ±8.
CVI color temperature adjustment.
1. In Rich status, choose a
CVI input (Color Temperature = normal).
2. Adjust YUVRC, YUVGC, YUVBC, YUVGD and YUVBD as
described in 2, 3, 4 and 5 of the "Normal color temperature
adjustment" procedure until you have reached a reading on
the color analyzer of x = 274 ±8 and y = 280 ±8.
8.6 Adjustment of Sub-brightness
1. In Rich & Normal status, apply standard grey & white
pattern via RF (NTSC-M).
2. Test the brightness of grey side of the picture to meet
BRTS 17 - 21 Nits.
Alignments
1 1
/ grey and / white pattern from
2 2
1 1
/ grey and / white pattern from
2 2
1 1
/ grey and / white pattern from
2 2
1 1
/ grey and / white pattern from
2 2
8.7 Picture Geometry Adjustment
1. Apply the Philips NTSC standard testing pattern in normal
status.
2. Then enter menu 3.
3. Adjust the following data to get the minimum distortion:
a. HPOS6 (Horizontal Centre).
b. PARA6 (Level).
c. TRAP6 (Trapezium).
d. HSIZE6 (Horizontal Size).
e. CNRT6 (Top).
f. CNRB6 (Bottom).
4. Apply the Philips NTSC standard testing pattern in normal
status.
5. Enter menu 3.
6. Adjust the following data to get the minimum distortion:
a. HIGH6 (Height).
b. VP60 (Vertical Center).
c. VLIN6 (Linearity).
d. VSC6 (Vertical-S Correction).
7. Apply the Philips PAL standard testing pattern in normal
status.
8. Then enter menu 3.
9. Adjust the following data to get the minimum distortion:
a. HPOS6 (Horizontal Centre).
b. PARA6 (Level).
c. TRAP6 (Trapezium).
d. HSIZE6 (Horizontal Size).
e. CNRT6 (Top).
f. CNRB6 (Bottom).
10. Apply the Philips PAL standard testing pattern in normal
status.
11. Enter menu 2.
12. Adjust the following data to get the minimum distortion:
a. HIGH5 (Height).
b. VP50 (Vertical Center).
c. VLIN5 (Linearity).
d. VSC5 (Vertical-S Correction).
8.8 The Peak White Adjustment
In Rich status and Color Temperature = Normal, apply the peak
white signal with a 14x14 cm window to the AV input. Enter
factory alignment menu 5, select SCNT to adjust the sub-
contrast until the spec of the window is 285 ±15 Nits.
8.9 Initialization
Put the set into "Factory Mode" (see "How to Put the Set into
Factory Mode", the first item of this chapter). Press the
"SOUND" button, the screen displays "WAIT". When the
screen displays "OK", the initialization is finished.