Schematic Diagram - Yamaha TX-497 Service Manual

A B
SCHEMATIC DIAGRAM (TUNER)
1
FRONTEND
FM IF
FM
2
AM
3 AM IFT
4
pin 24 of IC1
5
6
7
IC1 : LC72130 (PLL)
8
9
C D E
DISCRIMINATOR
BALANCE FM/AM DETECT
MONAURAL
DISTORTION
STEREO
DISTORTION
TP1
AM SENSITIVITY
SIGNAL METER
PLL
IC2 : LA1266 (AM/FM IF)
F G
MPX DECODE
LPF
FM
TP2
AM MUTE SW
TP3
SEPARATION
IC3 : LA3401 (FM MPX)
pin 21 of IC3
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
H I J
PK1 : ENV-17297G1 (VQ98760)
Ω
K L
TX-497
IFT
21