Toshiba 34HF85 Service Manual page 56

A B
8
FROM/TO SCALER
DATA0
DATA1
DATA2
DATA3
7 DATA4
DATA5
DATA6
DATA7
DATA8
DATA9
DATA10
DATA11
DATA12
DATA13
DATA14
DATA15
DATA16
DATA17
DATA18
DATA19
DATA20
DATA21
DATA22
6
DATA23
DATA24
DATA25
DATA26
DATA27
DATA28
DATA29
DATA30
DATA31
ADDR0
ADDR1
ADDR2
ADDR3
ADDR4
ADDR5
ADDR6
ADDR7
ADDR8
5
ADDR9
ADDR10
BA0
BA1
WEN
CASN
RASN
CSN
DQM
SDRAM_CLK
4
3
FROM/TO IN/OUT/REGULATOR
2
P.CON+3.3V
GND
1
A B
G-33
C D
SDRAM SCHEMATIC DIAGRAM
IC3902
SDRAM
MT48LC2M32B2P-6(Y14W)
0
VSS
DATA15 1.5
DQ15
0
VSSQ
DATA14 1.7
DQ14
DATA13 1.2
DQ13
C3965
3.1
VDDQ
0.1 B
DATA12 1.7
DQ12
DATA11 1.7
DQ11
0
VSSQ
DATA10 0.2
DQ10
1.6
DATA9
DQ9
C3964
3.1
VDDQ
0.1 B
DATA8 1.6
DQ8
0.7
NC NC
0
VSS
0
DQM1
0.4
NC NC
0.5
NC NC
SDRAM_CLK 0.6
CLK
R3919
3.1
CKE
470
ADDR9 0.9
A9
0.9
ADDR8
A8
ADDR7 1.2
A7
ADDR6 1.2
A6
ADDR5 1.2
A5
ADDR4 1.2
A4
ADDR3 1.2
A3
0
DQM3
0
VSS
0.3
NC NC
DATA31 1.5
DQ31
C3963
3.1
VDDQ
0.1 B
DATA30 1.7
DQ30
DATA29 1.3
DQ29
0
VSSQ
DATA28 1.7
DQ28
DATA27 1.7
DQ27
C3962
3.1
VDDQ
0.1 B
DATA26 1.6
DQ26
DATA25 1.6
DQ25
0
VSSQ
DATA24 1.6
DQ24
0
VSS
NLC3225
L3908
47uH
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
C D
E
(SCALER PCB)
C3954
3.1
VDD
0.1 B
1.3 DATA0
DQ0
C3955
3.1
VDDQ
0.1 B
1.3 DATA1
DQ1
1.2 DATA2
DQ2
0
VSSQ
1.1 DATA3
DQ3
1.3 DATA4
DQ4
C3956
3.1
VDDQ
0.1 B
1.3 DATA5
DQ5
1.3
DATA6
DQ6
0
VSSQ
2.1 DATA7
DQ7
2.2
NC NC
C3957
3.1
VDD
0.1 B
0.1 DQM
DQM0
3.1 WEN
WE#
3.1 CASN
CAS#
3.0 RASN
RAS#
2.9 CSN
CS#
0.2
NC NC
2.7
BA0
BA0
2.8 BA1
BA1
0.2 ADDR10
A10
1.0 ADDR0
A0
1.1 ADDR1
A1
1.1 ADDR2
A2
0.1
DQM2
C3958
3.1
VDD
0.5
0.1 B
NC NC
1.3 DATA16
DQ16
0
VSSQ
1.2 DATA17
DQ17
1.3 DATA18
DQ18
C3959
3.1
VDDQ
0.1 B
0.3 DATA19
DQ19
1.3 DATA20
DQ20
0
VSSQ
1.4 DATA21
DQ21
1.3 DATA22
DQ22
C3960
3.1
VDDQ
0.1 B
2.1 DATA23
DQ23
C3961
3.1
VDD
0.1 B
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
E
F G
PCBDS0
CED020
F G
34HF85/34HF85C
H
8
7
6
5
4
3
2
1
H
G-34