1
WRT-808A (U)
Table of Contents
1. Operating Instructions
2. Service Overview
2-1.
Disassembly ................................................................................................ 2-1
2-2.
Note on Reassembly .................................................................................... 2-3
3. Electrical Alignment
3-1.
Equipment and Tools .................................................................................. 3-1
3-2.
Adjustments ................................................................................................. 3-2
3-2-1.
Power Supply Voltage Check .................................................... 3-4
3-2-2.
Carrier Frequency Adjustment ................................................... 3-4
3-2-3.
RF Power Output Adjustment .................................................... 3-5
3-2-4.
Reference Frequency Deviation Adjustment ............................. 3-6
3-2-5.
Maximum Frequency Deviation Check ..................................... 3-7
3-2-6.
Distortion Ratio Check ............................................................... 3-7
3-2-7.
Input Level Control Check ......................................................... 3-8
3-2-8.
AF/PEAK and POWER/BATT Indicators Check ...................... 3-9
3-2-9.
S/N Check ................................................................................ 3-10
3-2-10. Frequency Characteristics Check ............................................. 3-11
3-2-11. Tone Signal Adjustment ........................................................... 3-11
3-2-12. Battery Alarm Signal Check .................................................... 3-13
3-2-13. Spurious Emissions Check ....................................................... 3-15
3-2-14. Occupied Band Width Check ................................................... 3-16
4. Semiconductor Pin Assignments
5. Spare Parts
5-1.
Notes on Repair Parts .................................................................................. 5-1
5-2.
Exploded Views .......................................................................................... 5-2
5-3.
Electrical Parts List ..................................................................................... 5-4
5-4.
Accessories Supplied .................................................................................. 5-7
6. Block Diagram
Overall Block Diagram ............................................................................... 6-1
