Yamaha CRX-E400, Руководство по обслуживанию

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A B C D E F G H
1
2
3
4
5
6
I J K
7
8
RX-E400
19
■
SCHEMATIC DIAGRAM (MAIN)
* All voltage are measured with a 10M
Ω
/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.
Each voltage represents the voltage when receiving FM (stereo) signal and the voltage in the parentheses ( ) is the voltage when receiving AM signal.
IC109 : LC72722
RDS Decoder & Controller
+
REFERENCE
VOLTAGE
57kHz
bpf
(SCF)
CCB
TEST
PLL
(57kHz)
ANTIALIASING
FILTER
SMOOTHING
FILTER
RAM
(24 BLOCK DATA)
ERROR CORRECTION
(SOFT DECISION)
SYNC/EC
CONTROLLER
SYNC
DETECT-1
DATA
DECODER
CLOCK
RECOVERY
(1187.5Hz)
MEMORY
CONTROL
OSC/DIVIDER
VREF
CLK(4.332MHz)
SYNC
DETECT-2
VDDA
VSSD
VDDD
RDS-ID
SYNC
SYR
VSSA
MPX IN
DO
CL
DI
CE
T1
T2
T3
T4
T5 T6 T7
X IN
VREF FL
OUT
C IN
X OUT
3 14
15
19
18
24
1 5 6
4
2
20
21
22
23
7
8
9
10
11 16 17 13 12
Point
r
(Pin12 of IC109)
V : 2V/div H : 0.1
µ
sec/div
DC range 1 : 1 probe
0V
IC101, 210 : NJM2068D-D
Dual OP-Amp
IC100 : LC78211
Analog Function Switch
L2
L4
L3
LCOM1
L1 1
2
3
4
5
L6
LCOM2
L5 6
7
8
L8
LCOM3
L7 9
10
11
V DD 19
V
SS
16
V EE 12
RES 18
S 17
LEVEL SHIFTER
LATCH
SHIFT REGISTER
R2
R4
R3
RCOM1
R1
R6
RCOM2
R5
R8
RCOM3
R7
20
22
30
29
28
27
26
25
24
23
21
CONTR
OL
15 CL
14 D1
13 CE
2 3
P1
5 IN 1
1 GND
4 VZ
6 IN 2
OUT
1
8
VCC 2
10
OUT
2
9
P2
INPUT LOGIC
PRE DRIVER
7
VCC 1
IC211 : LB1641
Motor Driver
INPUT SELECTOR
BUFFER
REGULATOR
RDS DECODER
MOTOR DRIVE
MAIN POWER SUPPLY
SUB POWER SUPPLY
REGULATOR
TONE CONTROL
AMP
POWER AMP
MUTE
MUTE
PROTECTION
MUTE DRIVE
TUNER(Lch)
11.9
11.5
14.1
0
13.9
13.9
0.7 0.5
0
14.2
35.6
37.6
14.7
0
-37.7
-37.7
0
0
0
-14.8
-14.8
-27.4 -14.3
23.9
0
11.9
37.6
37.5
37.5
0
37.1
1.1
0.5
37.6
0.5
0
0
-0.5
-37.7
-0.5
-1.1
-37.7
37.6
37.5
37.5
0
0
0
37.5
37.2
0
0
0
0
0
0
0.7
-29.1
-29.7
0 0
0.5
0.7 0.5
11.9
0
0
0 0
14.2
-14.3
0 0
4.8
0.1
0.1
0
14.2
0.1
0.1
0
-14.3
0
0
-2.4
0 0
0.6
-36.3 -37.2
0
0
0.6
-36.4
-37.2
0
0
-36.4
-1.1
-37.0
-36.3
-37.0
-1.1
-1.1
-0.5
-37.7
-0.5
0
-37.7
0
0
0
37.2
0
0 0
-0.1
0
0
-0.1
0 0
-0.1
0 0
-0.1
0.5
-37.6
0
1.0
37.2
0.5
-1.1
1.1
-0.4
-1.1
1.1
-0.4
-2.4
14.2
0
0
0 0
0
0
0 0
0 0 0
0
0 0
0
0
14.2
0
0
0
-14.3
0
0 0 0 0 0 0 0 0
AC12.0
0
0.7
0
AC4.4
AC58.4
r
0 (0) 0 (0) 0.1 (0) 4.7 (4.7) 4.9 (0.1) 0 (0) 4.8 (4.8)
2.3 (2.3)
2.4 (2.4)
2.4 (2.4)
2.4 (2.4) 4.8 (4.8)
0 (0) 0 (0) 0 (0)
CIRCUIT CHANGES BY MARKET. O : USED X : NOT USED
SAME PAGE
[D-5]/[C-6]
SAME PAGE
[F-3]
P-20 [C-7]
P-20 [F-7]
P-20 [H-4]
SAME PAGE
[A-5]
SAME PEGE
[D-5]/[C-6]
SAME PAGE
[I-2]
SAME PAGE
[A-5]
SAME PAGE
[I-2]
SAME PAGE
[A-5]
– +
OUT 1
–IN
1
–V
CC
+V CC
OUT
2
1
2
3
4 5
+IN
1
–IN
2
+IN
2
– +
6
7
8