Yamaha DSP-AX1/RX-V1 Service Manual page 86

A B
DSP-AX1/RX-V1
SCHEMATIC DIAGRAM (TUNER : RX-V1 only)
1
2
10.4 10.5
(0) (11.5)
0.1
(10.6)
3
VT
87.5MHz 1.9V
FM 98.0MHz 4.5V
9.3
108.0MHz 7.8V
(9.4)
531KHz 1.3V
5.1
AM 1080KHz 5.0V
(5.2)
1611KHz
7.3V
AM
4
bottom view
5
6
7
IC1 : LA1266
AM/FM IF
AM-IF STRQ FM-IF FM-IN
20 18 11 13 10 1 2 3 5 6 7
V CC
IF IF
FM-IF Q.D.
BUFFER BUFFER
8
21 RF MIX AM-IF DET
OSC NARROW S-
REG. OSC AGC
BUFFER S-METER METER
GND
22 23 24 4 14 19 17 16
E-101/J-93
C D E
DISCRIMINATOR BALANCE ADJ.
AM/FM IF
MONAURAL DISTORTION ADJ.
FM
FM
(11.1)
11.0
7.7 (7.6)
2.4 (2.1)
3.0
(5.2)
(2.8)
5.1
4.4
(4.4)
AM
AM SENSITIVITY
SIGNAL METER ADJ.
(11.5)
0
11.4
(0.2)
11.4 (11.5)
2.4
(0) (0)
0
(5.0) 4.9 0.1 10.6
(0)
0
(0) REGULATOR
(2.5) 0 0
(0) 2.4 11.4 (0.2)
(5.0) 4.9 0 (0)
5.0 11.4
(5.0) (11.5)
(1.0) 1.0 0 (0)
(1.0) 1.0 0 (0)
5.7
(5.0) 4.5 0 (0)
(5.7)
(0)
0
(2.5)
(2.5) 2.5 2.4
5.7
(5.7)
9
0
(0)
PLL
IC2 : LC72131
PLL Controller
q
XIN REFERENCE
PHASE DETECTOR
DIVIDER
@2 CHARGE PUMP
XOUT
!6 SWALLOW COUNTER
FMIN 1/2
1/16,1/17 4BITS
POST
12 FM-OUT
AMP.
12BITS UNLOCK
!5 DETECTOR
AMIN PROGRAMMABLE
DIVIDER
9 REG.
(TO 22PIN)
e
CE
15 AM-OUT
r
DI
2
t C B
CL
DATA SHIFT REGISTER UNIVERSAL
I/F
LATCH COUNTER
DO y
LED
8 V DD
DRIVER
POWER
!7
VDD ON
RESET
@1
VSS
u i o !0 !1 !3
F G
MPX
0 (0)
0 2.8
(9.1)
(0) (9.1) 2.8
(0) 0
4.9
(4.9)
0 (0)
SEPARATION ADJ.
IC3 : LA3401
MPX
22 21 20 19 18 17 16 15
!8
PD
PHASE
PILOT DET
VOL REG OSC
COMPARATOR
!9
AIN1 80K
VCO
@0 STOP
AOUT1
SYMMETRICAL
REACTANCE
CIRCUIT
FF FF FF
FF FF
38KHz 19KHz ∠90° 19KHz ∠0°
MUTING CONTROL
DECODER
FM AM CHANGE OVER
RA
RB RB
!2 RC
IFIN MUTING
FM AM CHANGE
RC V
1K MUTING
1 2 3 4 5 6 7 8
H I
PK1 : ENV-172C8G1R (V2909100) U, C, R, T models
CIRCUIT CHANGES BY MARKET.
L11 L1
C2
5P
L10
1 2 3 4
PK1 : ENV-172A4G1 (V2716700) A, B, G, L models
C1 C11
39P 22P
: USED
R1 C2
L9
100K 15P
: NOT USED
C28
6P
C32
0.01µ
1 2 3
P-E94/J86
K-6
Point o (Pin22 of IC2)
V : 2V/div
DC range
0V
2V
14 13 12
LAMP
DRIVER
TRIGGER
STEREO
SWITCH
MUTING
OUTPUT
CC ON
80K 1K
9 10 11
J K
Q2
C8
2SC2620 L7
Q1 R4 5P
C5
2SK360 22
5P
DT2
L5 R19
MA372
R8 10K
L2 L3
1K
D5 DT1
MA110 MA372
C32
R3 C31 R28 C24
2200P
100K 1.5P 47P
C33
2200P C13 R5 C10 R7
0.018µ 100K 27P 680K
C9
C29
470P
R9 2P
100
R2
100K
R15
C27 R12 R16 R22 R23
10K 330 330K 330
Q4
C17 C19
2SC2814
9P 5P
R10
2.7K
C18
DT4
22P
MA372 R17
R25
C15 10
L6
0.2P
Q6
C26 C12 C14 R13 R14 C20 2SC2619 C23
0.018µ 0.018µ 82P 10K 1.8K 12P 15P
5 6 7 8
Q2
C8
2SC535 L7
L1 4P
DT2 DT3
SVC212 SVC212
Q1
R4
C3 C5 2SK439
150
0.75P 10P
L5
L4 R19
R26 0.47µ
1.5K
L2 L3
DT1 R8
SVC212 10K
C24
C6 C7
47P
7P 2.5P
C4 R3
C10 R7
7P 100K
R27 27P 1M
390
R2 C31 C30 C13 R5 R6 C9
L8
100K 0.01µ 0.018µ 0.018µ 100K 100K 470P
R9
33
R20 R21
C29 C27
330K 470 R12 R22 R23
2P 0.018µ
10K 330K 330
Q4
Q5
2SC461
2SC461
C16 C17 C19
2P 8P 5P
R10
4.7K
C18
27P
R24
R25
10
C15 L6
Q6
C26 C12 C25 C14 R13 R14 C20 C23
DT4 2SC461
0.01µ 0.018µ 0.01µ 47P 10K 1.8K 12P 15P
SVC212
4 5 6 7 8
H : 0.1 µsec/div
1 : 1 probe
SAMPLE 0.1us
* All voltage are measured with a 10MΩ/V DC electric volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
L