Philips FX20 Service Manual page 41

8-13
Circuit Diagram - Main board:AMP ST518*2
A
1
CH1B
CH1A
PWM INPUT
CH2B
CH2A
TH_WAR
TH_FAULT
R241 R241
CE26 CE26
NC/10K NC/10K
100uF/16V 100uF/16V
process input EAPD
FB18 FB18 75/200mA 75/200mA
DVCC3
2
CH3B
CH3A
CH4B
CH4A
TH_WAR
TH_FAULT
R249 R249
CE30 CE30
10K 10K
100uF/16V 100uF/16V
EAPD
3
FB20 FB20 75/200mA 75/200mA
DVCC3
4
A
B
U21 U21
STA518 STA518
36 1
VCC-Sign SUB-GND
35 2
VCC-Sign OUT2B
C206 C206 C207 C207
34 3
0.1uF/50V/X7R 0.1uF/50V/X7R 0.1uF/50V/X7R 0.1uF/50V/X7R VSS OUT2B
33 4
VSS VCC2B
C211 C211
32 5 1uF/50V/X7R 1uF/50V/X7R
IN2B GND2B
31 6
IN2A GND2A
30 7
IN1B VCC2A
29 8 C215 C215
IN1A OUT2A
0.1uF/50V/X7R 0.1uF/50V/X7R
28 9
TH-WAR OUT2A
C219 C219
27 10
R242 R242 FAULT OUT1B
+ +
NC/10K NC/10K
26 11
TRI-STATE OUT1B
25 12
PWRDN VCC1B
C222 C222
24 13
1uF/50V/X7R 1uF/50V/X7R
CONFIG GND1B
23 14
VL GND1A
22 15
C230 C230 VDD VCC1A
+ +
CE27 CE27 21 16 C228 C228
VDD OUT1A
100uF/16V 100uF/16V 0.1uF/50V/X7R 0.1uF/50V/X7R
C232 C232
20 17
GND-Reg OUT1A
C227 C227
0.1uF/50V/X7R 0.1uF/50V/X7R
19 18
GND-CLEAN NC
C233 C233
1000pF/50V/X7R 1000pF/50V/X7R
U22 U22
STA518 STA518
36 1
VCC-Sign SUB-GND
35 2
VCC-Sign OUT2B
C234 C234 C235 C235
34 3
0.1uF/50V/X7R 0.1uF/50V/X7R 0.1uF/50V/X7R 0.1uF/50V/X7R VSS OUT2B
33 4
VSS VCC2B
C239 C239
32 5 1uF/50V/X7R 1uF/50V/X7R
IN2B GND2B
31 6
IN2A GND2A
30 7
IN1B VCC2A
29 8 C243 C243
IN1A OUT2A
0.1uF/50V/X7R 0.1uF/50V/X7R
28 9
TH-WAR OUT2A
C247 C247
27 10
R250 R250
+ + FAULT OUT1B
NC/10K NC/10K
26 11
TRI-STATE OUT1B
25 12
PWRDN VCC1B
C250 C250
24 13
CONFIG GND1B 1uF/50V/X7R 1uF/50V/X7R
23 14
VL GND1A
22 15
C258 C258 VDD VCC1A
+ +
CE31 CE31 21 16 C256 C256
VDD OUT1A
100uF/16V 100uF/16V 0.1uF/50V/X7R 0.1uF/50V/X7R
C260 C260
20 17
GND-Reg OUT1A
0.1uF/50V/X7R 0.1uF/50V/X7R
19 18
GND-CLEAN NC
CE33 CE33 + +
820uF/50V 820uF/50V
1000pF/50V/X7R 1000pF/50V/X7R
B
C D
D723 D723
NC/MBRX140/40V/1A NC/MBRX140/40V/1A
L406 L406 22uH/3.3A 22uH/3.3A
D722 D722
0.1uF/50V/X7R 0.1uF/50V/X7R
R238 R238 C208 C208
C209 C209
C210 C210 0.1uF/50V/X7R 0.1uF/50V/X7R
R239 R239
22 22 R240 R240
AMP
6.2 6.2 C214 C214
6.2 6.2
D721 D721 0.01UF/100V 0.01UF/100V
C217 C217
C218 C218 0.1uF/50V/X7R 0.1uF/50V/X7R
0.1uF/50V/X7R 0.1uF/50V/X7R
L409 L409 22uH/3.3A 22uH/3.3A
L410 L410 22uH/3.3A 22uH/3.3A
C220 C220
0.1uF/50V/X7R 0.1uF/50V/X7R
D724 D724 C221 C221
0.1uF/50V/X7R 0.1uF/50V/X7R
22 22 R244 R244 C224 C224
C225 C225
6.2 6.2 R245 R245
0.01UF/100V 0.01UF/100V
6.2 6.2
C229 C229
C231 C231 0.1uF/50V/X7R 0.1uF/50V/X7R
0.1uF/50V/X7R 0.1uF/50V/X7R
L411 L411 22uH/3.3A 22uH/3.3A
AMP
C275 C275
+ +
CE29 CE29
1000pF/50V/X7R 1000pF/50V/X7R
820uF/50V 820uF/50V
D725 D725
NC/MBRX140/40V/1A NC/MBRX140/40V/1A
L412 L412 22uH/3.3A 22uH/3.3A
D727 D727
0.1uF/50V/X7R 0.1uF/50V/X7R
C236 C236
C237 C237
C238 C238 0.1uF/50V/X7R 0.1uF/50V/X7R
R247 R247
22 22 R248 R248
AMP 6.2 6.2
C242 C242
6.2 6.2
D728 D728 0.01UF/100V 0.01UF/100V
C245 C245
C246 C246 0.1uF/50V/X7R 0.1uF/50V/X7R
0.1uF/50V/X7R 0.1uF/50V/X7R
L413 L413 22uH/3.3A 22uH/3.3A
L414 L414 22uH/3.3A 22uH/3.3A
C248 C248
0.1uF/50V/X7R 0.1uF/50V/X7R
D726 D726 C249 C249
0.1uF/50V/X7R 0.1uF/50V/X7R
22 22 R252 R252 C252 C252
C253 C253
6.2 6.2 R253 R253
0.01UF/100V 0.01UF/100V
6.2 6.2
C257 C257
C259 C259 0.1uF/50V/X7R 0.1uF/50V/X7R
0.1uF/50V/X7R 0.1uF/50V/X7R
L415 L415 22uH/3.3A 22uH/3.3A
C267 C267 C261 C261 C269 C269
C268 C268
0.1uF/50V/X7R 0.1uF/50V/X7R 1000pF/50V/X7R 1000pF/50V/X7R
0.1uF/50V/X7R 0.1uF/50V/X7R
C D
8-13
E
1
CON_9P_0GNDD CON_9P_0GNDD
WL+ 1
1
WL- 2
2
TL+ 3
3
TL- 4
4
WR+ 5
5
WR- 6
6
TR+ 7
7
8
TR-
8
9
9
JK704 JK704
2
WR+
WR-
TR+
TR-
3
4
E