Schematic Diagram - Main Board (2/6) - Sony HT-CT180 Service Manual

4-4.

SCHEMATIC DIAGRAM - MAIN Board (2/6) -

1 2
MAIN BOARD (2/6)
A
STB_3V3
R3 R3
10K 10K
EN2
EN2
TP43 TP43
Q1 Q1 R8 R8 10K 10K
POWER_ON
NPN_3DG3904M NPN_3DG3904M
C12 C12
B
0.1uF/25V/Y5V 0.1uF/25V/Y5V
STB_3V3
U4 U4
AS1117 AS1117
C
3 2
input Vout
4
Out
1.25V
D
STB_3V3
SYS_3V3
Q3 Q3
PNP_3CG9012M PNP_3CG9012M
R774 R774
C755 C755
0.1uF/25V/Y5V 0.1uF/25V/Y5V
22K 22K
E
R21 R21 560 560
EN2
HT-CT180
• See page 28 for IC Block Diagrams.
3 4
POWER_18V AMP_VCC
POWER_18V
FB19 FB19 600/2A 600/2A
1V2
5 6 7
Rate : 2A 30V 160m
In Range: 4-30V
Out Range: 0.923V-12V
Vout=0.923(R1+R2/R2)
R1 R1
R5 R5
CE7 CE7
C3 C3
47K 47K
+ + C6 C6 0.01uF 0.01uF
L1 L1 10uH/2A 10uH/2A
56 56
C4 C4
U2 U2 R99 R99
7 3
EN SW
R6 R6
C7 C7 8 5
SS FB 100pF 100pF
22K 22K
FB=0.923V
EUP3482ADIR1 EUP3482ADIR1
C11 C11
C10 C10
3300pF//50V/X7R 3300pF//50V/X7R C152 C152
R10 R10
150 ohm 150 ohm
7.5K 7.5K
Vout=0.923(R1+R2/R2)
R25 R25
C116 C116
C15 C15
C16 0.01uF C16 0.01uF
L2 L2
56 56
C17 C17
U3 U3 R123 R123
7 3
EN SW
C20 C20 8 5
100pF 100pF
SS FB
FB=0.923V
EUP3482ADIR1 EUP3482ADIR1
C19 C19
C18 C18
C162 C162
3300pF//50V/X7R 3300pF//50V/X7R
POWER_ON R81 R81 100 100
R95 R95 150 ohm 150 ohm
7.5K 7.5K
21 21
8
340KHz
STB_3V3
R16 R16 0 0
R57 R57
CE25 CE25 39.2K/1% 39.2K/1%
+ +
R96 R96
7.5K/1% 7.5K/1%
R97 R97
7.5K/1% 7.5K/1%
SYS_5V
10uH/1A 10uH/1A R122 R122 0 0
R115 R115
CE27 CE27 51K/1% 51K/1%
+ +
R120 R120
1K/1% 1K/1%
R121 R121
10K/1% 10K/1%
HT-CT180