Tuner Adjustment - Yamaha RX-V495 Service Manual

TUNER ADJUSTMENT

1. Measuring Instruments
FM signal generator (FM SG)
Stereo signal generator (SSG)
AM signal generator (AM SG)
Distortion meter (DIST. M)
AC Voltmeter (ACVM)
DC Voltmeter (DCVM)
Oscilloscope
Low pass filter (YLF-15, fc=15kHz)
Oscillator
TEST POINT
AM
SENSITIVITY
ADJ.
FM ANT
GND
AM ANT
MONAURAL
DISTORTION ADJ.
(ANTENNA)
IFT
PK1
FRONT END
T2
PK2
VR1
TP2
16
IC1
VR2
T1
TP1
T3
A, B, G, L
models only
DISCRIMINATOR
BALANCE ADJ.
(FRONT)
RX-V495/RX-V495RDS/HTR-5140/HTR-5140RDS
Dummy antenna
FM dummy antenna
10Ω
E1
FM SG
(50Ω)
E2 (dB) = E1 (dB) -6 (dB)
FM dummy antenna
E1
FM SG
(75Ω)
E2 (dB) = E1 (dB)
AM loop antenna
AM dummy antenna
AM SG
(50Ω)
SIGNAL METER ADJ.
IC2
IC3
T5 T4
CB4
SEPARATION
ADJ.
45Ω
E2
RECEIVER
(75Ω)
E2
RECEIVER
(75Ω)
10KΩ
AM ANT
GND
Front
Panel
22