Read Sharp CD-MD3000 (serv.man25) Service Manual online
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CD-MD3000H/CD-MD3000W
IC1202 RH-iX2474AFZZ: 4Mbit D-RAM (IX2474AF)
Pin No.
Function
Terminal Name
1, 2
I/O1, I/O2
Data input/Data output
3
WE
Write enable
4
RAS
Row address storobe
5
A9
Address input
6-9
A0-A3
Address input
10
Vcc
Power (3.3V)
11-15
A4-A8
Address input
16
OE
Output enable
17
CAS
Column address storobe
18, 19
I/O3, I/O4
Data input/Data output
20
GND
Ground
Figure 105-1 BLOCK DIAGRAM OF IC
IC1301 VHiFTD2005/-1: Head Driver (FTD2005)
IC1302 VHiCPH5608/-1: Head Driver (CPH5608)
D2
S2
S2
G2
D1
S1
S1
G1
5
6
7
8
4
3
2
1
G1
S
G2
D1
D2
1
2
3
4
5
Figure 105-2 BLOCK DIAGRAM OF IC
Figure 105-3 BLOCK DIAGRAM OF IC
IC1402 VHi58X2402T-1: EEPROM (58X2402T)
Pin No.
Function
Terminal Name
1-3
A0~A2
Device address
4
VSS
Ground
5
SDA
Serial data input/output
6
SCL
Serial clock input
7
WP
Write protect
8
VCC
Power supply
Figure 105-4 BLOCK DIAGRAM OF IC
1
2
3
4
8
7
6
5
A0
A1
A2
VSS
VCC
WP
SCL
SDA
4
RAS
5
17
15
CAS
A0
A9
WE
DQ0~DQ3
20
V
SS
V
BB
17
CAS
Clock Generator
CBR Refresh
Counter
Row Address
Buffer
Memory
Cell
I/O
Selection
Write Clock
Generator
Data Input
Buffer
Data Output
Buffer
Row Address
Buffer
On ChipVBB
Generator
Row Decoder
Column Decoder
Sense Amp.
Word Driver
SELF Refresh
Timer
MN42V4400 Only
3
OE
16
2
18
19
1
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