$pdf->writeHTML('Text with äää', true, false, false, false, '');
$pdf->Write(0, 'Text with üüü', '', 0, 'J', true, 0, false, true, 0);

$tbl = <<<EOD
<table cellspacing="0" cellpadding="1" border="1">
    <tr><td>Text with Ü</td></tr>
</table>
EOD;
$pdf->writeHTML($tbl, true, false, false, false, '');

$pdf = new MYPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);