Yamaha MCX-1000 Service Manual page 67

A B
SCHEMATIC DIAGRAM (MAIN: VIDEO Block)
1
2
5.0
3
0.2
0.2
4.8
0
Point 4 Pin 238 of IC402
4
5
6
IC403: W986416DH-7
SDRAM
CLK
CLOCK
BUFFER
CKE
CS CONTROL
SIGNAL
GENERATOR
RAS
COMMAND
DECODER
CAS
COLUMN DECODER COLUMN DECODER
WE
7 CELL ARRAY CELL ARRAY
A10 BANK #0 BANK #1
MODE
A0 REGISTER
SENSE AMPLIFIER SENSE AMPLIFIER
ADDRESS
A9 BUFFER
A11
DMn
BS0
BS1
DQ0
DATA CONTROL DQ
CIRCUIT BUFFER
DQ15
REFRESH COLUMN
COUNTER COUNTER UDQM
LDQM
COLUMN DECODER COLUMN DECODER
CELL ARRAY CELL ARRAY
BANK #2 BANK #3
8
SENSE AMPLIFIER SENSE AMPLIFIER
All voltages are measured with a 10MΩ/V DC electronic voltmeter.
Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
9 Schematic diagram is subject to change without notice.
C D E
0 0
1.3
1.3
1.3
0
5.0 1.6
3.0
0.7
1.1
3.3 2.9
5.0
VIDEO
ENCODER
4
F G H
IC401: MB3516APF-G-BND
RGB Encoder
OSD
I J
GND2 R-OUT G-OUT B-OUT VIDEO-OUT Vcc2 N.C. Y-TRAP Y-OUT CROMA-OUT N.C. N.C.
24 23 22 21 20 19 18 17 16 15 14 13
R Output G Output B Output VIDEO Y Output CROMA
buffer buffer buffer Output buffer buffer Output buffer
75Ω drive 75Ω drive 75Ω drive 75Ω drive 75Ω drive 75Ω drive
Y/C
MIX
Buffer
Y
R-Y
R-Y
LPF
Modulation
B-Y
LPF B-Y
Modulation
CSYNC CSYNC CSYNC
Burst Generation
Phase
Clamp Clamp Clamp LPF & NTSC/PAL
Generation
Selection
1 2 3 4 5 6 7 8 9 10 11 12
GND1 R-IN G-IN B-IN N.C. fsc-IN NTSC/PAL-IN N.C. N.C. CSYNC-IN N.C. Vcc1
SDRAM
K L
MCX-1000
67