Agc Adjustment; Stereo Adjustment; Vertical Adjustment - THOMSON CR14300 Basic Service Data

3.4 AGC Adjustment

•
Apply a color bar pattern (RF Input) with 500µV signal;
•
Connect a DC Voltmeter, in the AGC pin of the tuner;
•
Adjust AGCT to Zero and measure the voltage (V1);
•
Adjust AGCT so that the indication on the voltmeter be (V1) - 1 ± 0.2V.

3.5 Stereo Adjustment

•
For the adjustments, proceed according to illustration 2;
•
Adjust output indicated by "A" to tension equal to half of VCC plus 1V ;
•
Adjust TC to an indication in the microAmpère meter of 24µA in the pin 17 of IC450;
•
Apply 300Hz/Mono/25KHz of deviation, 250mVrms, in the pin 29 of IC450;
•
Adjust SL to 500±20mVrms in the pins 15 and 38 of IC450;
•
Apply in the channel L=300Hz and in the channel R= 3k, 14% of generator Stereo modulation
DBX-NR (EIDEN BTSC );
•
Change ADJ from 0 to 1. Check A1 and A2 after 1 second (if they varied);
•
After 1 second returns ADJ to 0 . The stereo circuit will align automatically.

3.6 Vertical Adjustment

•
Apply a circle Pattern Philips signal (RF Input)
•
Using the remote control, set the MAGIC mode "ORIGINAL"
All manuals and user guides at all-guides.com
ILLUSTRATION 2
8