Yamaha DVD-S2300MK2, Руководство по обслуживанию, Страница: 61 / 63

A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
DVD-S2300MK2
SCHEMATIC DIAGRAM (RS-232C)
53
★
All voltages are measured with a 10M
Ω
/V DC electronic volt meter.
★
Components having special characteristics are marked
s
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
+
–
+
–
1 2
3
V
OUT
5
ON/OFF
4 Oadj
V
IN
V
REF
COM
Voltage
regulator
Over current
protection
circuit
Over heat
protection
circuit
ON/OFF
circuit
Soft
start
Oscillator
ERROR AMP.
PWM COMP.
F/F
Q
S
R
IC822: PQ1CG21H2F
Voltage Regulator
IC821: M62723ML
Reset Signal Generator
IC824: TC7SH08F
2 Input OR Gate
1
2
3
IN B
IN A
GND 4
5 Vcc
OUT Y
IC
1 VIN
GND
DC output
VCC
3
2
5
IC825: PQ033EZ01ZP
Regulator
4G 13
4A 12
4Y 11
3G 10
3A 9
3Y 8
1A 2
2Y 3
2G 4
2A 5
2Y 6
GND 7
IC826, 827: TC74HC125AF
Quad Bus Buffer
Vcc 14 1G 1
IC828: TC7WU04F
Triple Inverter
1A
3Y
GND
VCC
1Y
1
2
3
4 5
2A 3A
2Y
6
7
8
IC829: SP3223ECA
RS232 Driver/Receiver
2
19
C1+
Vcc
18
GND
4 C1-
5 C2+
3
7
V+
V-
6 C2-
1 EN
20 SHUTDOWN
14 ONLINE
11 STATUS
13 T1IN
TTL/CMOS INPUTS RS-232 OUTPUTS
17 T1OUT
12 T2IN 8 T2OUT
15 R1OUT
TTL/CMOS OUTPUTS RS-232 INPUTS
16 R1IN
10 R2OUT 9 R2IN
1.25V
R1
R2
2
1
6
GND
COUNTER
OSC
SUPPLY VOLTAGE
OUTPUT
"L" RESET TYPE
Page 51
to MAIN (4)
to Power Transformer
to Power Transformer
L5
Page 51
K8
Page 51
J5
Page 48
to SACD
F10
Page 52
to MAIN (2)
A5
RS-232C
REMOTE CONTROL
RS-232C DRIVER
PHOTO COUPLER
SUB CPU
AND
REGULATOR
BOTTOM HOLD
RELAY DRIVER
REGULATOR
RESET
SIGNAL
GENERATOR
3-STATE
BUFFER
INVERTER
IC823 is not available.
Change the board when IC823 is defective.
Point D Pin 13 of IC823
2
3
10
8
6
5
4
7
12
11
13
1
7
2
3
6
5
3
1 2
5
4
11
12
10
1
4
13
8
9
6
8
4
3
2
14
9
1
PQ3DZ53
3-STATE BUFFER
D
AC15.3
0.1 12.6
16.6 -0.3
3.3
3.3
0
0
0
0
0
3.3
3.3
3.3
3.3
3.3
0
3.3
0
0
0
0
0
3.3
0
0.1
0
3.3
3.3
3.3
0
3.3
3.3
3.3
3.3
3.3
0
3.3
3.3
3.2
3.3
3.3
0
3.3
3.3
0
3.2
3.3
3.2
0
3.3
3.3 3.3
0 0 3.3 1.7 0 1.4 3.3 3.3 3.0 3.2
0
3.3
3.3
0
3.3
3.3
0 0 0
3.3
3.3
3.3 3.3 0 16.6
0
0
3.2
3.3
3.0
3.3
3.2
0
3.2 3.2
3.3 3.3
3.3
0
0
0
0
0
0
0
0
0
0.1
0
0.8
3.3
0
3.3
16.6 1.3 0 3.4
0
16.6
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
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