Adjustments; Power Supply Voltage Check; Carrier Frequency Adjustment; Rf Power Output Adjustment - Sony WRT-808A Service Manual

3-2. Adjustments

This section describes the following adjustments and checks
required to satisfy specifications.
Adjustment and Check Items

3-2-1. Power Supply Voltage Check

3-2-2. Carrier Frequency Adjustment

3-2-3. RF Power Output Adjustment

3-2-4. Reference Frequency Deviation Adjustment

3-2-5. Maximum Frequency Deviation Check
3-2-6. Distortion Ratio Check
3-2-7. Input Level Control Check
3-2-8. AF/PEAK and POWER/BATT Indicator Check
3-2-9. S/N Check
3-2-10. Frequency Characteristics Check
3-2-11. Tone Signal Adjustment
3-2-12. Battery Alarm Signal Check
3-2-13. Spurious Emissions Check
3-2-14. Occupied Bandwidth Check
n
. 0 dBV = 1 Vrms
. 0 dBm = 0.775 Vrms
3-2
Preparation
1. When adjustments are performed, remove the Main frame
assembly (with battery terminal) from WRT-808A unit.
Refer to the "Section 2. Service Overview" for removal.
2. Peel off the copper leaf sheet from the main frame
assembly.
3. Connect the MM-SMA (J) connector (J-6402-480-A)
with SMA-BNC (J) connector (J-6402-490-A) to the an-
tenna connector (CN402) on the RF-90 board as shown
below.
4. Unsolder the soldering bridge from the printed slit land
on the RF-90 board as shown below.
n
After completing adjustment and checking, be sure to
make a solder bridge to the slit land.
Main frame assembly
Copper leaf sheet
CN402
SMA-BNC (J) connector
MM-SMA (J) connector
Battery terminal
Black
Red
Unsolder the solder bridge.
n
After completing adjustment
and checking, be sure to
make a solder bridge.
WRT-808A (U)