Advertisement
1
2
D
BYG22D is in Simons Library
MOLEXPWR4 is in Simons library
From Torroid
F1
Q_20
QPAD
FUSE T375MA SM
D10
SK4
Q_21
3
1
S1D
QPAD
4
2
D2
MOLEXPWR4
S1D
F2
Q_22
QPAD
FUSE T375MA SM
R48
2K2 0805
C
D5
S1D
C29
R36
10U EL SM
10K 0805
B
R34
XMUTE
10K 0805
R35
10K 0805
MUTE CIRCUIT
A
1
2
3
ANALOGUE POWER
D6
HS1
TO220HS30REG
+UR
Z1
LM317T
I
Vin
+ C1
3M3 EL
D4
S1D
D3
S1D
+ C3
3M3 EL
I
Vin
Z4
-UR
LM337T
R44
R45
R46
47K 0805
47K 0805
47K 0805
+UR
C25
+
R42
Z6
8K2 0805
100U EL SM
TA7317P
D8
2
IN1
BAS16W SM
Q_19
6
RL_MUTE
O
QPAD
3
IN2
C30
R47
47K 0805
1U0 EL
R41
8K2 0805
R49
33K 0805
-UR
3
4
5
S1D
R9,R10 changed from 100R to 22R at rev 3.1
+12VA
(11 8V)
Q_23
O
Vout
QPAD
R51
D11
S1D
+ C7
470U EL 25V
390R 0805
NF
+ C5
100U EL
R53
3K3 0805
R60
3K3 0805
+ C8
+ C6
470U EL 25V
100U EL
NF
R52
D12
390R 0805
S1D
O
Vout
Q_24
(-11.8V)
QPAD
D7
-12VA
S1D
+12V
R50
Q1 BC849B
0R0 MF
R15
10K 0805
D1
+ C19
3V9 0W5 SM
10U EL SM
+12V
+
RLY2C
RLY DPDT SM
SK5
+12V
Q_28 QPAD
-
1
Digital power & video power
2
+5V
3
4
Q_29
5
6
QPAD
7
8
100U EL SM
RL MUTE
AMPCT8
+ C26
100U EL SM
DRAWING TITLE
DVD AV PCB - Power
Circuit Diagram
23425
Notes:
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Filename
Cambridge CB5 9PB
J:\Change Control\ECO AGENDA\02 E000 L878 cap voltage correction\L878 3.3A.ddb - Documents\L878C2 3.3A.sch
4
5
6
7
+12VA, -12VA, +5V_DAC_L, and +5V_DAC_R are analogue supplies
+5V and +12V are digital supplies
+5V_VID is derived from +5V
D13
S1D
Z2
LM317T
Q_25
R9
I
O
Vin
Vout
22R 1W CF
QPAD
+ C9
R12
C13
330R 0805
22U EL
100N 0805
NF
+
C10
10U EL
R16
1K 0805
D15
S1D
Z3
LM317T
Q_26
R10
I
O
Vin
Vout
22R 1W CF
QPAD
+ C11
R13
C14
330R 0805
22U EL
100N 0805
NF
+
C12
10U EL
R17
1K 0805
Z9
78L05 SM
8
1
Vin
Vout
+ C103
C22
C33
10U EL SM
100N 0805
100N 0805
+12V
Z5
7805
I
Vin
Vout
C35
+5V_VID
100N 0805
L1
+ C27
33UH 2A RA
C32
100N 0805
02_E000 PG
07/01/02 Admin change - cap voltages corrected on BOM
PG
13/11/01 C155 changed to 100R
01_1047
PG
15-03-01 Diodes changed from 3B22D to 3BS1D
01_1000
PG
02/01/01 Change R9,R10 from 100R to 22R
00_1136
PG
24/11/00 Issue 3 PCB with 8740 DACs
ECO No.
INITIALS
DATE
Drawn by:
Date Printed
PG
7-Jan-2002
6
7
8
D
+5V_DAC_L
D14
S1D
+ C20
22U EL
Use hrough hole for C20 and C10
To allow for audio tweaking
+5V_DAC_R
C
D16
S1D
+ C21
22U EL
Power for clock oscillator
FLT3
+5V_CLOCK1
7G002
Q_27 QPAD
+ C23
C34
100N 0805
10U EL SM
B
Power for clock buffers
FLT4
+5V_CLOCK2
7G002
Q_62
O
QPAD
+ C104
C36
C37
100N 0805
100N 0805
10U EL SM
3.3A
A
3.3
3.2
3.1
3.0
DESCRIPTION OF CHANGE
ISSUE
Sheet
2
of
7
L878C2
DRAWING NO.
8
Advertisement
