: Designed for a 13.8V DC power supply; the manual warns against using 24V sources.
If you hear distortion on FM signals because the radio is 2-3 kHz off frequency, the manual provides the alignment procedure for the TCXO (Temperature Compensated Crystal Oscillator). Usually, it involves adjusting a variable capacitor or setting via the service menu. Tyt Th-9800 Service Manual Pdf
Here are the top 5 scenarios where the service manual becomes indispensable: : Designed for a 13
He didn't need a user guide; he needed the "holy grail" of radio repair—the TYT TH-9800 Service Manual Tyt Th-9800 Service Manual Pdf
: Diagrams for various board versions (TH-9800-A-1, B-1, C-1) that trace the flow of electrical signals.