JVC LT-26DB1BU/AX Service Manual page 35

MAIN PWB CIRCUIT DIAGRAM (4/28) [Power Regulation]
1
NORMAL POWER
+5V
R21
A
104/1005
C21 C23
106p/16V/2012
106p/16V/2012
7
8
C29
104p/16V/1005
4
C28
OPEN-106p/16V/2012
TP23
+3V3
PCB_TP10
B
R29
104/F/1005
C41
C42
C48
106p/10V/2012
106p/10V/2012
104p/16V/1005
R30
104/F/1005
TP25
PCB_TP10
+3V3
+5V
C52
C53
3
106p/16V/2012
104p/16V/1005
2
R33
103/1005
4
C
8
C58
9
OPEN-104p/16V/1005
C59
105p/16V/1005
U25
LD29150PT/P-PAK 5P
MAX 1.5A
TP28
TP27
PCB_TP10
PCB_TP10
+5V
C63 C64
D
106p/16V/2012 104p/16V/1005
C65
OPEN-105p/16V/1005
All location are from 21 to 80
1
2
TP22
PCB_TP10
L21
4.7uH/SPC7040-4R7/3.5A
TP21
C22
PCB_TP10
103p/50V/1005
R42
000/1005
D21
R1
U21 OPEN-SX34
MP2307 R22 C24
243/F/1005
106p/10V/2012
3
EN SW
5
SS FB
C27
332p/50V/1005
6
GND COMP
R23
R2 912/F/1005
Max.3A
R24
C30 562/1005
OPEN-561p/50V/1005
VOUT = 0.925V * (1 + R1/R2)
TP24
PCB_TP10
U23
MP2121DQ R39 C43
000/1005 103p/50V/1005
L22
4 5
IN BS
SPC6025-1R0M
7 3
IN SW
6 8
POK SW
R1
10 1
EN/SYNC FB
R31
304/F/1005
C50
OPEN-106p/2012
R2 R32
6043/F/1005
Vout=0.8V(R1+R2)/R2
TP26
PCB_TP10 +1V8
U24
[Douglas DDR]
RT9018B25PSP
+1.816V,
6
VIN VOUT
Max.781mA
C54 C55
R1
R34
EN
753/F/1005 106p/10V/2012 104p/16V/1005
7
VDD ADJ
5
GND NC
R2 R36 R37
593/F/1005 104/F/1005
1
TAP PGOOD
Max.3A
Vout=0.8V(R1+R2)/R2
+3V3_D
+5.03V
MAX 642mA
C67
R40 C66 C68
1692/F/1005
103p/50V/1005 104p/16V/1005
106p/10V/2012
R41
103/F/1005
2
(No.YA698<Rev.001>)2-13
3 4
+3V3
L16 +3.36V, Max.2.790A
BLM31PG601SN1
C25 C26
104p/16V/1005 100uF/25V/BXE/S
[Douglas Core]
+1.2V,
+1V2 Max.1634mA
check 1V2 ripple noise
C62
100uF/25V/BXE/S
C44
C61
226p/6.3V/2012
226p/6.3V/2012
MAIN PWB ASS'Y (4/28)
[Power Regulation]
HU-71100005
3 4
2-14(No.YA698<Rev.001>)
5
STAND-BY POWER
TP29
+5V4STB PCB_TP10
U22 RT9167-50PB
1 5
VIN VOUT
3
EN
2 4
GND BP
C31 C32
106p/16V/2012 Open_104p/16V/1005 C69
104p/16V/1005
3V3 Power Branch
+3V3 L23 +3V3_A
BLM18PG300SN1D
C45 104p/16V/1005
C46 C47 100uF/16V/MVK/S
104p/16V/1005
+3V3H
+3V3_D L24
BLM18PG300SN1D
C49 104p/16V/1005
C51 100uF/16V/MVK/S
1V8 Power Branch
+1V8
VDDR_MEM
L25
BLM18PG300SN1D
R35
102/F/1005
C57
C56
104p/16V/1005 100uF/25V/BXE/S
R38
102/F/1005
DGND GND_A
5
6
TP30
PCB_TP10
+5VSTB
MAX 29mA
A
C33 C34
104p/16V/1005
105p/16V/1005
B
DDR_VRF
C
C60
104p/16V/1005
D
6
lt-26_32db1bu_0514_2/30_0.0