Toshiba 34HF85 Service Manual page 57

A B
8
7
FROM/TO SYNC CONT/CONNECTOR
CP3901B (CP3901A)
87760-3416
1 P.CON+5V
2 P.CON+5V
3 GND
4 GND
6
5 P.CON+3.3V
6 P.CON+3.3V
7 GND
8 GND
9 3D_Y/C-RESET
10 SCL
11 SOFT RESET
12 SDA
13 GND
14 GND
15 Y_OUT
16 GND
5
17 GND
18 Pb_OUT
19 Pr_OUT
20 GND
21 VSYNC
22 V_AV
23 C(CVBS)
24 HSYNC
25 GND
26 HD_UP NC
27 Y(1)
28 GND
4 29 GND
30 VD_UP NC
31 Pb(1)
32 GND
33 GND
34 Pr(1)
3
2
1
A B
G-35
C D
IN/OUT/REGULATOR SCHEMATIC DIAGRAM
L3903
27uH
2.7 BUFFER
BUFFER
R3921
W833 Q3902
2.0
Q3901
2SA1530A1
2SA1530A1
820 2.0
0
1.4
0
P.CON2.5V REG
IC3451 PQ070XZ01ZPH
DS
IN V.C OUT V.ADJ GND
6
1 2 3 4 5
3.3 3.3 2.5 NC 1.3 R3453 0
1K+-1%
C3455
16V 10 V-S
R3458
4.7K
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)
R3936
BUFFER
BUFFER W820
150
Q3903
Q3905
2SA1530A1
2SA1530A1
BUFFER
2.7 2.0 L3909
R3924
W834 Q3904
2.0 1.3
2SA1530A1
820 2.0 15uH
0 0
1.4
0
P.CON1.8V REG
IC3452 PQ070XZ01ZPH
DS
IN V.C OUT V.ADJ GND
6
1 2 3 4 5
3.3 1.8 0.9 0
3.2 NC R3456
1K+-1%
C3456
16V 10 V-S
R3460
4.7K
D3451 R3462
EC31QS04 2.2
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
E
F G
BUFFER
Q3906
2SA1530A1
1.3
0.7
0
FROM/TO SCALER
ANALOG_Y_OUT
ANALOG_U_OUT
ANALOG_V_OUT
SDA
SCL
SOFT_RESET
P.CON+3.3V
P.CON+1.8V
GND
FROM/TO SDRAM
P.CON+3.3V
GND
FROM/TO DIGITAL COMB
Y/CVBS_IN
C_IN
SCL
SDA
3D_Y/C-RESET
P.CON+2.5V
P.CON+1.5V
P.CON+3.3V
P.CON+5V
GND
FROM/TO ANALOG/DIGITAL CONVERTER
SCL
SDA
Y_IN
U[CB]_IN
V[CR]_IN
VSYNC
HSYNC
P.CON+3.3V
GND
PCBDS0
CED020
F G
34HF85/34HF85C
H
8
7
6
5
4
3
2
1
H
G-36