Overall Characteristics Check - Sony WRR-800A Service Manual

Step 3.
After completing adjustment, turn off the WRR-800A
power switch and perform the followings.
(1) Remove the tuner unit from the WRR-800A.
(2) Remove the lower side case lid from the tuner unit,
and unsolder the wire ( 80 mm long) from the TP201
(NOISE) terminal (land).
(3) Attach the upper and lower side case lids to the tuner
unit, and insert the tuner unit to the slot of the WRR-
800A.

3-2-2. Overall Characteristics Check

Perform the overall characteristics check according to the
following procedure.
Procedure
1. Output level check
↓
2. S/N check
↓
3. Frequency characteristic check
↓
4. Distortion check
↓
5. RF Level indicator /RF indicator check
↓
6. AF Level indicator/AF indicator check
↓
7. Muting level check
↓
8. BATT indicator check
↓
9. Tone squelch check
Equipment and Tools
. DC power supply: +9 Vdc
. Signal generator
. Function generator
. Audio analyzer
. Mic amp (Noise mete) with A-weighted filter
. Oscilloscope
. DC current meter
WRR-800A
Connection
Oscilloscope
MIC amp
600 Z
balance
input
Audio analyzer
DC power supply
DC IN 9 V
+9 Vdc
Signal generator
ANTENNA
A IN
Function generator
TUNER OUTPUT
WRR-800A
ANTENNA
B IN
3-7