Fm Tuner Check; Diagrams - Sony STR-DH520 Service Manual

FM TUNER CHECK

FM AUTO STOP CHECK
generator
set
OUT (75 Ω)
Procedure:
1. Turn on the set.
2. Input the following signal from Signal Generator to FM
antenna input directly.
* Carrier Frequency: A=87.5 MHz, B=98 MHz, C=108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Use 75 ohm "coaxial cable" to connect SG and the set.
You cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confi rm that input Frequency of A, B and C are detected and
automatic scanning stops.
The stop of automatic scanning means "The station signal is
received in good condition."
SECTION 3
• Circuit Boards Location
STANDBY-A VIDEO MT PC board
TEMP-SENSOR board
POWER KEY board
HEADPHONE board
11 11
STR-DH520
SECTION 4

DIAGRAMS

DCDC board
TUNER (FM/AM)
HDMI RE PC board
DIGITAL board
MAIN board
DISPLAY board