YAESU FT-747GX

Adjustment

FM IF Amplifier

Adj.	Description

PLL Board

Adj.	Description

Main Board

Adj.	Description

Modification

Coverage mods
On backside of display unit there is a brown jumper wire near the large ribbon cable. Cut this jumper wire.
Turn radio on and set display for 12.345.6 and then turn radio off and then back on. This enables the general coverage mode and a GEN display will appears on at the top of the LCD display. It will now transmit between 1.5 and 30 MHz.

COMPONENTS

TDA2003H Audio Power Amplifier MC3357P FM IF-Amplifier and Mixer uPC1037H Duble Balanced Mixer CX7925B Serial Input PLL Frequency Synthesizer and Programmable divider IR3M03A DC/DC Converter M54459L 1/20, 1/100 High Speed Divider M54563P 8-Unit 500mA Source Type Darlington Transistor Array with Clamp Diode M54564P 8-Unit 500mA Source Type Darlington Transistor Array M5218AL Dual Low-Noise Operational Amplifiers (Dual Power Supply Type) M5223L Dual Single Power Supply Operational Amplifiers SN16913P RF Mixer 2SC2166 Pre-Driver Transistor 2SC3133 Driver Transistor 2SC3240 Finale Transistor - 100 Watt - 30MHz - SSB