PHILIPS - 29PT6541/44/85 _ 30PW6341/37 _ 32,S6341/37 _ 32PT5441/37 _ 32PT6441/37 _ 32PW6341/85 _ 33PT5441/85 _ ALIGNMENT PROCEDURE

ALIGNMENT CONDITIONS
Perform all electrical adjustments under the following conditions:

• AC voltage and frequency: 120 V_ac / 60 Hz or 240 V_ac / 50 Hz (region dependent).
• Connect the set to the AC power (a.k.a. Mains voltage) via an isolation transformer with a low internal resistance.
• Allow the set to warm up for approximately 20 minutes.
• Measure the voltages and wave-forms in relation to chassis ground (with the exception of the voltages on the primary side of the power supply). Never use the cooling fins / plates as ground.
• Test probe: Ri > 10 Mohm; Ci < 2.5 pF.
• Use an isolated trimmer / screwdriver to perform the alignments.

HARDWARE ALIGNMENTS

VG-2 ADJUSTMENT

1. Activate the SAM.
2. Go to the WHITE TONE sub menu.
3. Set the values of NORMAL RED, GREEN and BLUE to “32”.
4. Go, via the MENU key, to the normal user menu and set
5. SATURATION/COLOR to “0”.
6. CONTRAST to “0”.
7. BRIGHTNESS to minimum (OSD just visible).
8. Return to the SAM via the MENU key.
9. Connect the RF output of a pattern generator to the antenna input. Test pattern is a 'black' picture (blank screen on CRT without any OSD info) with a signal strength of 1 V_pp.
10. Set the channel of the oscilloscope to 50 V/div and the time base to 0.2 ms (external triggering on the vertical pulse). Ground the scope at the CRT panel and connect a 10:1 probe to one of the cathodes of the picture tube socket.
11. Measure the cut off pulse during first full line after the frame blanking  (V_cutoff waveform”). You will see two pulses, one being the “cut off” pulse and the other being the “white drive” pulse. Choose the one with the lowest value; this is the “cut off” pulse.
12. Select the cathode with the highest V_dc value for the alignment. Adjust the V_cutoff of this gun with the SCREEN potentiometer on the LOT to 160 V_dc, except for the 25/28BLD picture tube (Black Line Display, for EU only); this tube must be aligned to 140 V_dc.
13. Restore BRIGHTNESS and CONTRAST to normal (= 31).

SOFTWARE ALIGNMENTS.

Click on image.  Right click on the enlarged image, save image as, to a folder (My document > My  Pictures).  View it in ‘Picasa’ picture viewer.  There you can enlarge it more.  Download ‘Picasa-3’ by Google site, and install it to your system.  It’s a  free software from Google and download it by Google. [Search for ‘Picasa’ by Google]