Adjustment For White Balance; Adjustment For Crt Cut Off; Adjustment Procedure - Panasonic TX-21RX25R Service Manual

2.3.

Adjustment for White Balance

Preparation:
1. Receive the white balance pattern and aging should be performed over 30 minutes.
2. Set the picture menu to DYNAMIC NORMAL.
3. Degausse the CRT face.
4. Fix the CRT colour analyzer receiver unit to CRT face.
Adjustment of Low Light
1. Adjustment Sub Bright, so that Y = 6.5 ± 1.0 nit.
2. Adjustment R-CUT OFF, so that X = 0.241 ± 0.005 nit.
3. Adjustment G-CUT OFF, so that Y = 0.242 ± 0.005 nit.
Adjustment of High Light
1. Adjustment Sub Bright, so that Y = 150 nit.
2. Adjustment R-Drive, so that X = 0.263 ± 0.003 nit.
3. Adjustment B-Drive, so that Y = 0.261 ± 0.003 nit.
2.4.

Adjustment for CRT CUT OFF

Preparation:
1. Connect the oscilloscope probe to TPL5.
2. Screen VR min.
3. Set the data Sub Bright, Bright.
4. In service Mode at "Bright" dac press [5] in factory mode to enter vertical line and adjust by presing the volume down or up
button.
5. Adjust "Screen VR" until 1-H Line appears.
2.5.

Adjustment Procedure

2.5.1. +B Voltage
Item / preparation
1. Operate the TV set.
2. Set control as follows :
Brightness ........... minimum
Contrast ............... minimum
Adjustment procedure
1. Confirm the DC voltage at the indicated test points, as follows :
TPA 15 : 3.35 ± 0.2 V
TPA 16 : 130 ± 2 V
TPA 17 : 8.25 ± 0.35 V
TPA 18 : 1.85 ± 0.15 V
TPA 19 : 5.30 ± 0.2 V
TPA 20 : 188 ± 15 V
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TX-21RX25R