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Transceiver
FT-990
Service manual
Yaesu FT-990 Service Manual
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Also See for FT-990
:
Operating manual
(66 pages)
,
Operating manual
(65 pages)
,
Manual
(6 pages)
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Contents
Table of Contents
Bookmarks
Table of Contents
Contents
Introduction
Chip Component Information
Ceramic Capacitors
Tantalum Capacitors
Resistors
Replacing Chip Components
Precautions for Chip Replacement
Removing Chip Components
Installing a Replacement Chip
Cover Removal and Board Access
Pilot Lamp Replacement
Board Locations
Alignment
Alignment Preparation and Precautions
Local Unit
3Rd Local BPF
Reference Frequency
36.269-Mhz 2Nd Local Buffer
PA Unit
LPF Unit
Pll VCV
Final Idling Unit
Tuning Capacitor/Motor
SWR Meter Calibration
Tuner Impedance
Tuner Unit
Default Beeper and Sidetone Levels
IF Unit
High SWR Sensing
2Nd/3Rd Local Buffer Level
Receiver Circuits
IF Shift Zero Set
IF Interstage Transformers
IF Notch Depth
RF AGC and S-Meter Calibration
Noise Blanker
FM Detector Output Level
RTTY and PKT Jack Receiver AF out Levels
Transmitter
AF out and DVS-2 Jack Receiver AF out Levels
Carrier Level
Transmitter if Interstage Transformers
IC Meter Zero Set
Overcurrent ALC
RF Unit
AM Peak Output
Reverse ALC
Transmitter if Gain
ALC Meter Calibration
AM Carrier/Modulation Level
Tx AFSK Tone Level
Transmitter if Gain II
FM and CTCSS Devitation
Comp Meter Calibration
VCC/IC Meter Calibration
Antenna Tuner Power
Transmitter Carrier Point
Block Diagram
Interconnection Diagram
AF Unit
PLL DDS and Carrier DDS Units
Control Unit
100-W Power Amp Unit
Tuner Main Unit
Tuner Control Unit
Connector Unit
Protector Unit
Display Unit
Potentiometer Unit
Switch a Unit
Key Unit
Rotary Encoder Unit and Switch B Unit
Push Button Switch Unit and MIC Unit
Headphone Unit
DC Switch Unit
Regulator Unit
Motherboard
Power Supply Unit
Mechanical Details
Exploded View
PS Unit
Front Panel Assembly
Chassis Assembly
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Operating Manual
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Manual
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