Philips 20PT643F Service Manual page 66

Model Number
27ST421L/17
32LT621L/17
32ST220P/17
32ST230P/35
36ST220P/35
36ST230P/35
Tuner
Note: Described alignments are only necessary when the NVM (part reference number
7602) is replaced.
IF-PLL
This adjustment is auto-aligned. Therefore, no action is required.
AGC (AGC take over point)
1. Connect the RF output of a video pattern generator to the antenna input.
2. Input a color bar test pattern to the television set.
3. Set the amplitude of the video pattern generator to 10 mV and set the frequency
to 61.25 MHz (channel 3).
4. Connect a DC multimeter to pin 1 of the tuner (item 1000 on the main chassis).
5. To enter SDAM, press the following key sequence on the remote control
transmitter: 0 6 2 5 9 6 directly followed by the MENU button (do not allow the
display to time out between entries while keying the sequence).
OP1 OP2 OP3
196 220 3
198 252 11
198 220 11
198 220 11
198 220 11
198 220 11
OP4 OP5
35 12
41 252
43 12
43 12
43 12
43 12