![Service Service](/uploads/1/2/5/6/125638916/210248480.jpg)
To access service menu: Power up radio while holding: FAST, A/B, A=B. Download the PDF File from new YEASU FT-991: user-manual-yaesu-ft-991-part-1 user-manual-yaesu-ft-991-part-2 Oficial Yaesu Web Site: LINK.
- 2FT-911 Preliminary Service Information
- 2Required Test Equipment
- 3Alignment Procedure: PLL Master Oscillator
- 3Alignment Procedure: VCV Voltage Verification
- 3Alignment Procedure: Transmitter Section
- 4Alignment Procedure: Receiver Alignment
- 5Circuit Board Access
- 5Board Locations
- 6Exploded View
- 6Screw List
- 7Motherboard Unit Parts Layout: Obverse View of 'Component' Side
- 8Motherboard Unit Parts Layout: Obverse View of 'Chip-Only' Side
- 9Motherboard Unit Circuit Diagram
- 11Motherboard Unit Parts List
- 14IF Unit Parts Layout/Circuit Diagram
- 15IF Unit Parts List
- 16Reg Unit Parts Layout/Circuit Diagram
- 17Reg Unit Parts List
- 19APC Unit Parts Layout/Circuit Diagram
- 20APC Unit Parts List
- 21AFC Unit Parts Layout/Circuit Diagram
- 22AFC Unit Parts List
- 23Control Unit Parts Layout
- 27Control Unit Circuit Diagram
- 29Control Unit Parts List
- 32SW Unit a & B
- 33FTS-17 Parts Layout/Circuit Diagram
- 34FTS-17 Parts List
- 35PLL, Clock Unit Parts Layout
- 36Pll, Clock Unit Circuit Diagram
- 37Pll, Clock Unit Parts List
- 39Connection Diagram
- 40Block Diagram