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A
B
PRINTED CIRCUIT BOARD (Foil side)
1
There are two types of P. C. B. Assembly Tuner for these models in items of construction of components.
One uses the Lead Type Device only and the other uses the Lead Type device and Surface Mount Device (SMD).
These P. C. B. assemblies are interchangeable.
MONAURAL
DISTORTION
ADJ.
DISCRIMINATOR
BALANCE ADJ.
2
FREQUENCY
STEP
(R,T only)
1
24
AM
ANT
3
GND
FM
ANT
4
W1
AM SENSITIVITY
ADJ.
J, U, C, R, T, A and L models
CIRCUIT CHANGES BY MARKET.
Semiconductor Location
J
Ref. No.
Location
5
D1
C3
R48
D2
C3
T3
D3
D3
IC1
B3
J41
IC2
C4
SW1
IC3
C3
Q1
B4
J42
Q2
B4
Q3
B3
R55
Q4
B2
R57
Q5
D3
Q6
D2
R58
Q7
C4
R60
6
C
P. C. B. ASS'Y TUNER LIST
Model
DSP-R495
RX-V495/HTR-5140
RX-V495/HTR-5140
•
RX-V495/HTR-5140
J, U, C, R, T, A and L models
RX-V495RDS/HTR-5140RDS B, G/G
P. C. B. TUNER (Lead Type)
TO : INPUT (1)
SEPARATION
ADJ.
12
1
11
13
12
22
11
1
22
12
SIGNAL
1
METER
ADJ.
U,C
R,T
A,L
1
Point
(Pin22 of IC2)
:USED
V : 2V/div
H : 0.1µsec/div
:NOT USED
0V
2V
SAMPLE 0.1us
D
E
Markets Lead Type Lead & SMD
J
V2518500
V2519200
U, C
V2518600
V2519300
R, T/T
V2518700
V2519400
A, L/A
V2518800
V2519500
V2518900
V2519600
MONAURAL
DISTORTION
ADJ.
AM
ANT
GND
FM
ANT
W1
B and G models
Semiconductor Location
Ref. No.
Location
D1
G3
DC range
1 : 1 probe
D2
F3
D3
H3
IC1
F3
IC2
G4
IC3
G3
IC4
H3
Q1
F4
Q2
F4
Q3
F3
Q4
F2
Q5
G3
Q6
H2
Q7
F4
40
F
G
DSP-R495/RX-V495/RX-V495RDS/HTR-5140/HTR-5140RDS
Lead & SMD : See page 42~43, PRINTED CIRCUIT BOARD
P. C. B. TUNER (Lead Type & SMD)
•
B and G models
P. C. B. TUNER (Lead Type)
DISCRIMINATOR
SEPARATION
BALANCE ADJ.
ADJ.
1
12
24
13
22
12
1
11
22
12
1
11
SIGNAL
AM SENSITIVITY
METER
ADJ.
1
ADJ.
Point
1
(Pin22 of IC2)
Point
V : 2V/div
H : 50nsec/div
DC range
1 : 1 probe
V : 2V/div
0V
0V
2V
2V
2V
SAMPLE 50us
H
TO : INPUT (1)
24
1
12
13
2
2
(Pin12 of IC4)
H : 0.1µsec/div
DC range
1 : 1 probe
SAMPLE 0.1us
41
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