Printed Circuit Board - Yamaha RX-V496 Service Manual

A B
I PRINTED CIRCUIT BOARD (Foil side)
1
There are two types of Tuner P. C. B. assemblies for this model:
One has only lead-type device and the other has lead-type and surface-
mount (SMD) devices. These two P. C. B. assemblies are interchangeable.
•
MONAURAL
2
DISTORTION DISCRIMINATOR
ADJ.
BALANCE ADJ.
1
24
3 AM
ANT
GND
FM
ANT
4
W1
AM SENSITIVITY
ADJ.
Lead Type
G
Semiconductor Location
Ref. No. Location
Point 1 (Pin22 of IC2)
5
D1 C3
D2 C3
V : 2V/div H : 50nsec/div
D3 D3
IC1 B3
IC2 C4
IC3 C3
IC4 D3
0V
Q1 B4
Q2 B4
Q3 B3
Q4 B3
2V 2V
Q5 C3
Q6 D2
Q7 C4
6
C
P. C. B. ASS'Y TUNER LIST
Model Markets Lead Type
RX-V496RDS/ B, G/G V2518900
HTR-5240RDS
B and G models (RDS model)
P. C. B. TUNER (Lead Type)
TO : INPUT (1)
SEPARATION
ADJ.
12
13
12
22
1 11
22 12
1 11
SIGNAL
1
METER
ADJ.
Point 2 (Pin12 of IC4)
V : 2V/div H : 0.1µsec/div DC range
DC range 1 : 1 probe
0V
SAMPLE 50us 2V SAMPLE 0.1us
D E
Lead & SMD
V2519600
AM
ANT
GND
FM
ANT
1 24
W1
12 13
2
Lead Type & SMD
G
Semiconductor Location
Ref. No. Location
D1 G5
1 : 1 probe D2 G5
D3 H4
IC1 F2
IC2 G3
IC3 G2
IC4 H3
Q1 F3
Q2 F3
Q3 F3
Q4 F2
Q5 G2
Q6 H2
Q7 G3
E-40/J-36
F
DSP-R496/RX-V496/RX-V496RDS/HTR-5240/HTR-5240RDS
•
B and G models (RDS model)
P. C. B. TUNER (Lead Type & SMD)
(Lead Type Device)
MONAURAL DISCRIMINATOR
DISTORTION BALANCE
SEPARATION
ADJ. ADJ. ADJ.
1
12
1
24
13
22
1
22
AM SENSITIVITY SIGNAL 1
ADJ. METER
ADJ.
(Surface Mount Device)
G H
TO : INPUT (1)
11
12
24 1
11
13 12
12
2
E-41/J-37