Yamaha DVD-C996 Service Manual page 51

A B
SCHEMATIC DIAGRAM (MAIN P.C.B. (3/3))
1 Q Q
CIRCUIT CHANGES BY MARKET. 3 7 6 3 1 5 1 5 0
2
3
4
CM (4)
P63
T E K-6
L 1 3 9 4 2 2 9 6 5 1 3
5
4.1
2.7
P63
A-3
3.7
2.5
6
7
IC207 : M51951BHP
IC209 : S-80820ANNP
Reset Signal Generator
Reset Signal Generator
VCC OUT
1 1
VDD 2
R1
2 OUT
R2
VREF
1.25V
w w w
VSS 4
3
GND
8
2SA1037K (Q, R, S) 2SA933S (Q, R) 2SB544 (E, F, G) 1SS355
.
2SD400 (E, F) MA8056-M
RB051L-40
C
E B E
C
B C
B
E
Cathode
C D E
+ 5V
REGULATOR
+ 2.6V
4.9
0 REGULATOR
0
0
0
0
0
0
0 4.2
0 4.2
0
0
± 7V
TRACKING
REGULATOR
-7.2 -15.6
2.5 4.8 4.9 4.8
-14.9
0 0
RESET SIGNAL GENERATOR
4.9
0
0
0
13.9
7.2 14.6
+ 9V
REGULATOR
9.0
14.2
0
4.8 13.7
14.3
0
x a o
y
RLZ5.1A 1N4002S D2SBA20 D4SBS4 NJM7809FA
i
RLZ27.0C
Anode
Anode
1: OUTPUT
–
–
Cathode 2: COMMON
3 2
3: INPUT
+
1
+
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VIDEO SELECTOR
AMP
3.1 0
11.9
4.2
11.9
3.0 1.7
5.7
0
11.3
4.9
3.0
0
4.9
4.9
0
0
0
-1.0
7.2
3.7 3.7
0
AC 7.2V
Q Q
2.7 3 7 6
0
5.3
2.6
2.6
0
POWER SUPPLY
AC 3.7V
-15.6
-0.2 -0.2
14.6
AC 25.4V
IC201 : TC74VHC08AF
Quad 2 Input AND
~ A1 1
~ -29.2
-25.9
-25.9 B1 2
Y1 3
-20.2
-26.5
A2 4
-15.4
B2 5
0
Y2 6
V SS 7
u 1 6 3
PQ05RD11 PQ1CG21H2F M5294P M51951BHP PQ12DZ5U
.
1 3
1: VIN
5 2: VC
1: VIN 1 5
8
3: VO
2: VO
2 4: NC
5: GND
3: GND
16
1
4: VC 1 : VCC
1 1
4 2 : GND
3 : OUT
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H I
2 4
8 9 9
11.3
11.1
4.2
1.0
4.9
3.0
0 4.9
0
0.7 0
0.7 0 0
0 0 0
2.8
0
0
0
0 0
2.6
4.9
3 1 5 1 5 0 8 9 2
IC203 : PQ1CG21H2F IC204 : M5290P
+2.6V Regulator Constant-Voltage Tracking Supply with Reset
V IN 1 2 V OUT
14 V DD
13 B4
VOLTAGE ON/OFF
12 A4 REGULATOR CIRCUIT
PWM
5 ON/OFF
COMP.
11 Y4
SOFT
10 B3 START
OVER CURRENT Q
PROTECTION R OSCILLATOR
9 A3 F/F
CIRCUIT 4 O ADJ
S
8 Y3
ERROR
AMP.
VREF
GND 9
OVER HEAT
PROTECTION
CIRCUIT
3 ON/OFF 10
COM
m
c o
S-80820ANNP TC74VHCT08AF TC74HC4052AF MM1443XJBE
TC74HC4053AF (EL)
BA7660FS-E2
18
4 3 TC74HC595AF
8
9
17
14
7
34
16 8
1
1 2
1
1
J K
DVD-C996/DV-C6280
IC287 : MM1443XJBE IC289 : BA7660FS-E2
Ω
Video Selector Amp 3 Channel 75 Driver
VCC1 VCC2
2
8 9 9
4 2
SW1 MUTE 1 16 VCC
TUN—V 28
31 V OUT1
INA 2 6dB 75Ω 15 OUTA1
BUF
GND 3 14 OUTA2
SW2
E1—V 1 30 V OUT2
INB 4 6dB 75Ω 13 OUTB1
6dB 75‰
DRIVE GND 5 12 OUTB2
E2—V SW3
3
29 V OUT3 N.C. 6 11 N.C.
EXT—V 5 6dB 75‰
DRIVE
INC 7 6dB 75Ω 10 OUTC1
SW4
TUN—L 24
0.12dB 27 L OUT1 GND 8 9 OUTC2
BUF
SW5
E1—L 10
26 L OUT2
600‰
0,2,4,6dB
DRIVE
SW6
E2—L 8
L OUT3
25
EXT—L 6 600‰
0,2,4,6dB
DRIVE
SW7
TUN—R 20
23 R OUT1
0.12dB
BUF
IC286 : PQ12DZ5U
+12V Regulator
SW8
E1—R 16
22 R OUT2
600‰
0,2,4,6dB
DRIVE
DC INPUT (VIN) 1 3 DC OUTPUT (VO)
SW9
E2—R 14
21 R OUT3
I C
EXT—R 12 600‰
0,2,4,6dB
DRIVE
13 PORT1
BIAS 7 2 ON/OFF CONTROL (VC)
BIAS
15 PORT2 5
GND
MUTE
9
2 I C
SDA
32
LOGIC
SCL 33
11 FS
19 34
GND1 GND2
IC288 : TC74HC4053AF(EL)
Triple 2-Channel Multiplexer/Demultiplexer
VDD
16
14 X-COMMON
OUT C IN OX
A 11 12
OUT C IN 13 IX
B 10 OUT C IN 2 OY
OUT C IN 1 IY
C 9
OUT C IN 5 OZ
OUT C IN 3 IZ
INH 6 4 Z-COMMON
15 Y-COMMON
8 7
VSS VEE
CONTROL INPUTS "ON" CHANNEL
INHIBIT C B A 0X (Pin 12), 0Y (Pin 2), 0Z (Pin 5)
(Pin 6) (Pin 9) (Pin 10) (Pin 11) 1X (Pin 13), 1Y (Pin 1), 1Z (Pin 3)
L L L L 0X, 0Y, 0Z
L L L H 1X, 0Y, 0Z
L L H L 0X, 1Y, 0Z
L L H H 1X, 1Y, 0Z
L H L L 0X, 0Y, 1Z
L H L H 1X, 0Y, 1Z
4 9 8 L H 2 H L 9 0X, 1Y, 1Z 9
L H H H 1X, 1Y, 1Z
H * * * NOTE
* Don't Care
IC206 : TC74HC4052AF
Analog Multiplexers/Demultiplexers
INHIBIT VDD
6 16
INHIBIT B A
0 0 0 0x, 0y
LEVEL BINARY TO 1-OF-4 0 0 1 1x, 1y
A 10
CONVERTER DECODER WITH INHIBIT 0 1 0 2x, 2y
B 9
0 1 1 3x, 3y
VSS 8
1 X X NONE
VEE
7
X0 12 SW
X1 14 SW
X
13
X2 15 SW
X3 11 SW
Y0 1 SW
Y1 5 SW
Y
3
Y2 2 SW
Y3 4 SW
OUTPUT
VCC
E– C+ NC (+5V) DELAY
16 15 14 13 12 7
REFERENCE
11
IN
8 RESET OUT
REFERENCE CURRENT
PROTECTION
REGULATOR CONTROL
ON/OFF
CONTROL
+
BAL. ADJ.
6
CURRENT CURRENT
CONTROL CONTROL
1 3 2 4 5
–VCC E– C– NC OUTPUT
(–5V)
* 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.
64