Toshiba 21V53 Manuale di servizio - Pagina 3

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software. See the IF indicator on service menu, it must be like on FIGURE-1 shown

belove.

IF POSITIVE ADJUSTMENT (WITH L' SYSTEMS)

Set the video pattern to a SECAM-L colour bar pattern with frequency 33.9 MHz. Apply

this IF signal to PIN-10 and PIN-11 of tuner. Press PROG-1 and after that BLUE

(INSTALL)button from remote controller. Select the BAND VHF-1 (S1 – S4 for PLL

tuners) and standard as L'. Enter service menu. Select IF1 parameter from service menu

and press BLUE (INSTALL) button from remote controller. IF adjustment will be done

automatically by software. See the IF indicator on service menu, it must be like on

FIGURE-1 shown below.

AGC: Automatic Gain Control

In order to do AGC adjustment, enter a 60µdBV RF signal level from channel C-12

(224.25 MHz) Select AGC parameter from service menu. Press BLUE (INSTALL)

button from remote controller. The adjustment will be done automatically by software.

See the AGC indicator on service menu, it must be 1. Check that picture is normal at

90dBµV signal level.

IF INDICATOR

AGC INDICATOR

NONE

FIGURE-1

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