LG adjustments free download

File name adjustments.pdf

ADJUSTMENTS 1. TEST & ADJUSTMENT POINT C G A B Figure 1. 1 2. FM ADJUSTMENT Power Supply PRE OUT GND (GND) STEREO SG (BACK UP) (ACC) VTVM SCOPE FM SSG UNIT EXIT ANT Jack. MODE IN OUT OUT AUDIO OSC Figure 2. (1) The impedance of FM antenna terminal is 75. Therefore, connect coaxial cable (3C-2V etc.) between FM SG and antenna terminal when wiring. Item FM SSG Available Antenna Attenuator Power Terminal Type Indication Rato Voltage Open indication 0dB 5.2dBf 6dB/uV type 60dB 65.2dBf 66dB/uV Load or close 0dB 11.2dBf 12dB/uV indication type 54dB 65.2dBf 66dB/uV (2) There are two kind in indication of FM SG output attenuator 1) Attenuator with marking of 75 open ... open indication type. 2) Attenuator with marking of 75 load or close ... load or close indication type. (3) FM SG output level in this FM adjustment are described as open indication type. The left table shows relations among FM SG attenuator indication (dB), available power ratio (dBf) and antenna terminal voltage (dB/uV) in each indication type. NOTE: 1. BAND Switch ... FM 2. BALANCE ... Center 3. TREB/BASS ... Center 4. Connect as shown in figure 2. 5. Refer to figure 1 for Adjustmenu Points. FEED SIGNAL S