Service manual

Schematic Diagrams
B - 34 POWER
B.Schematic Diagrams
POWER
Sheet 34 of 45
POWER
+2.5V
+3VS
+3V
+3VS
+1.5VS
+5VS
+3VS
+3VS
+3V +3VS
+3VS+3V
+3VS
+3V
+3V
+3VS
+3V +3V +3V +3V
ICHPWROK16, 24,26,28 CK8_PW RGD 13, 22
+5VS 8, 11,14,16,19 ,22, 23, 26, 28,29,30, 34, 35, 36
+12V 8,20, 21,23 ,2 6, 28, 29,30, 32
+3V 4,9, 10, 11, 13, 14 ,17 ,18,19,20,21,22 ,23 ,2 4, 26, 29, 32
+1.5VS 10,14,24,34
+VDD5 9, 13, 16, 19, 23,26,29,30,32, 34 ,36
+3VS 2, 4,8,9,10, 11, 12, 13, 14 ,16 ,18,19,22,23,24 ,2 5,2 8, 29, 32, 35,36
+2.5V 3,4,5,6,7,16,30
+1.2V_H T 2,9,14
H8BEEP22
H8_BEEP 26
PGOOD30
CK8_PWRGD
Z3 308
ICHPWROK
Z3311
Z3309
Z331 0
H8BEEP
H8_BEEP
Z3302
Z 3301
Z331 5
Z331 2
R235
1K
C903
0.1U
C309
*0.1U
C206
*0.1U
C902
0.1U
C901
0.1U
C908
0.1U
C900
0.1U
U26
74AHC1G14
24
53
1
U25
TC7SZ08
2
1
4
3
5
T4 25
C350
2200P
R232
1K
U14
7404_U MT5
2 4
53
1
R379
1M
CA25
0.1U
C904
0.1 U
T
R230
470K
C216
0.1U
R243
220K_1%
R242
750K_1%
U15
MIC2774
1
2
3
4
5
RESET#
GND
MR#
RST-IN
VCC
R241
1K
Q45
2SC 4672
B
E
C
R347
0
1 2
C905
0.1 U
C906
0.1 U
C907
0.1 U
R343
*5.1K
1 2
POWER SEQUENCING
94/1/26_Alex
CK8_PWRGD Faster than PWRGD_SB.
MAX6306 Delay 200ms
NOTE:
94/7/25
U15 VCC ? ? +3VS
R243 180K change to 10K
R242 39K change to 39K
Rubb a n d
Change By vin 7/28
Place at +3VS & +3V Plane Between.
94/9/14
Fix auto-shutdown
Rubband
94/11/14 Kevin
94/1 1/1 4 Kev in
10K Change 470K