Philips MRD200 Service Manual page 20

CIRCUIT DIAGRAM - KEY BOARD
1
A
B
C
0v
4.9v
4.9v
D
0v
E
3.5v
F
1
5-2
2 3
4.9v
4.9v
0v
0v
4.9v
4.9v
3.5v
+5v
2 3
4 5
5.1v
5.1v
4.2v
AC 1.3v
0v
AC 1.3v
4.9v
4.9v
4.9v
5.1v
0v
0v
5.1v
0v
5.1v
LVU0219C021
VOLUME SCHEMATIC
3.5v
4.9v
0v
4.9v
4.9v
4.9v
LVU0219C031
LED SCHEMATIC
4 5
5-2
6
C201 A1 R998
R203 B1
C202 A1 R9002 D3
R204 B1
C203 A1 R205 B1 R9003 C4
C204 D3 R206 B1 R9004 E4
RB201 D5
C205 D3 R213 A1
A
RB202 F5
C207 B1 R214 A2
C208 B1 RB204 E4
R215 C5
C209 B1 RB205 F4
R216 D3
C212 F2 R223 C4 RB301 E6
C213 F2 R224 C4 SN201 C3
C214 F4 R225 D3 TA202 D1
TA204 C2
C215 F4 R227 E3
C328 B6 TA205 C2
R228 C1
B
C331 B6 TA206 C2
R229 C1
C334 B6 TA207 C2
R230 C1
C340 C6 R231 C1 TA208 D2
C341 C6 R232 D2 TA209 D2
TA210 F4
C342 B5 R233 D2
VR201 E5
C345 B5 R234 D2
C346 D6 XL981 F2
R235 D2
C347 C6 FB302 B6
R236 D3
C
C348 C6 R237 D3 FB303 B6
C350 A6 R238 A1 ZD201 C4
C351 A6 R239 B1 ZD202 D3
ZD203 D3
C991 F3 R241 D4
C992 F2 ZD301 B5
R242 D4
C993 F2
R349 B6
C994 F2
R350 B6
D201 C3 R353 C6
D D202 C3 R354 C6
D203 C3 R355 D6
D301 D6 R356 D6
D302 B6
R357 D6
D985 E3
R358 D6
DP201 A3 R359 D6
IC251 B2 R360 C6
IC304 B6 R361 C6
E IC981 F3 R362 C5
JK301 A5
R363 C6
LVU0219C041
LD201 E4
R364 C6
PHONE SCHEMATIC
Q201 D1
R365 B6
Q202 D2 R366 B6
Q203 D3 R367 D6
Q204 D4 R987 F2
Q306 C6 R988 E2
Q307 D5
R991 F3
F
Q308 B5
R992 F3
Q983 E2 R993 F3
R201 A1 R995 E3
R202 B1 R996 F2
6
E2