Philips AZ7900 Service Manual page 14

1250 A7 1951 E14 2256 B12 2268 C14 2406 F2 2957 E13
1251 A8 2251 B9 2257 A13 2269 B11 2950 G8 2958 H13
1403 A2 2252 A10 2258 A13 2400 B4 2951 F10 2960 F14
1418 F1 2253 C10 2259 A13 2401 D2 2952 D10 2961 H13
1430 G4 2254 A10 2260 B12 2402 C2 2953 D10 2962 E13
1950 H14 2255 A11 2265 A6 2405 F2 2954 D11 2964 H10
1 2
+3
PART 1
A
1403
ESD
+3
B
7400 34 35
33 HOLD
3,1V KE0
2402 F400
C
32
RESET
3V
220n
3400
31
5400
2K2 XOUT
CSTCC
1,2V
8M46
30
2401
XIN
1,2V
47p
29
P51
0,7V
D
3,0V 28
PORES
P50
3432
1,8V 27
R92
SCL
SCK
100R
3431
1,7V 26 R91
SDA
SO
100R
E
2,0V 25 R90
SILD
SI
+3 +3
24 R83
HOLD
T1
3V
SLOW CLOCK
R82
23
INT1
ESD
ZIN
4 3 2 1
22 21
F
1418 ESD-11H130
+3
+3 +A
+3
3,1V
7956-A
3 8
G LM2904
4,6V
1,9V
1
F259
2
4
1,7V
LOBAT DETECTION
H
X....component only forseen (not in use)
V EVM
%....tolerance of component = 1%
1 2
CS 46 651
4-1
2965 H10 2974 G11 3254 A9 3262 B10 3268 C13
2966 F10 2975 H11 3256 B7 3263 B10 3269 G1
2967 E9 2976 F11 3257 A8 3264 A10 3270 G1
2970 F14 3250 A8 3258 C9 3265 B12 3271 G1
2971 G14 3251 B7 3259 B9 3266 B14 3273 G2
2973 F11 3253 C7 3261 B9 3267 C14 3280 B11
3 4 5 6
+3
0211
DISPLAY
(connected via membrane assembly)
ESD
+3
36 37 38 39 40 41 42 43 44
1 S5
SEG5
1,7V
LCD - DRIVER
2 S6
SEG6
1,7V
3 S7
SEG7
1,7V
4 S8
4-BIT CPU
SEG8
1,7V
5
S9
SEG9
1,7V
RAM
ROM
6 S10
SEG10
1,7V
7 S11
SEG11
1,7V
TMP47C422
R60 8 S12
SEG12
1,7V
R61 9 MODE
SEG13 2,5V
R62 10 PROG
I/O PORT
I/O PORT
SEG14 2,5V
ADC INPUT
R63 11 NEXT
SEG15 2,5V
20 19 18 17 16 15 14 13 12
+3
+3
DOORSWITCH
A
DC voltages measured in
PLAY-mode, DBB off
Set supplied via mains adaptor
3 4 5 6
3290 C7 3406 B2 3412 F1 3953 E10 3966 H10 5251 A13
3400 C2 3407 A5 3413 F1 3954 G9 3967 F10 5400 C1
3401 D2 3408 A6 3414 A3 3955 G9 3968 F10 6251 A9
3403 A2 3409 A6 3416 F4 3956 E8 3969 G10 6252 A10
3404 A3 3410 F4 3431 E2 3961 G10 3970 E10 6253 A12
3405 B2 3411 G4 3432 D2 3962 D9 5250 A12 6254 B14
7 8 9
DC/DC UP/DOWN CONVERTER
6256 1251
F250 5V 4,7V
1250 I250 T630mA
SB140
SP391
F252
I251
3254
DC JACK
F251
100K
6251
3257
2,1V 2,5V
10K
BAS216
+A
3259
4,6V
PLAY
+3
0,5V
PLAY_ON
3,1V 0V
0V
POWER OFF
7252
0,6V BC847BW
SQUARE WAVE GEN.
1,4V
11
+3
7250-F
74LV14 3,1V
14
HP_ON 13 12
3,1V
0V
7
from 7807-PART2
from 3809-PART2
+3A
5
1,5V
6
VR REFERENCE
from 3811-PART2
from 3813-PART2
7 8 9
4-1
6256 A7 7250-C B11 7254 A9 7956-A G2 F255 A14 F404 A3
6257 B7 7250-D D10 7255 A11 7956-B G9 F256 A14 F405 A3
6950 D9 7250-E E9 7256 B12 F250 A7 F259 G2 F406 A6
6951 C10 7250-F E8 7257 A12 F251 A7 F400 C2 F407 A5
7250-A B10 7252 C8 7400 B2 F252 A7 F402 A2 F408 A6
7250-B B11 7253 C9 7950 E11 F254 B11 F403 A3 F950 H14
10 11 12
4,7V
2254 3264
4,1V BC857BW
7255
100K
100n
3,1V 4,5V
7257
BC807-40
3,1V
4,7V
7254
BC857BW
3265
3,1V 7250-B
470R
74LV14
14
F254
3263 3280 2256
3 4
100K 0,2V 470R 10n
7
2269
7250-A
7250-C
74LV14
74LV14
4,7V
14 2n2
14
10K 3262
1V 2,9V
1 5 6
2
7256
47K
0,2V
7 7 BSH 105
7253
BC847BW
5µs 5µs
3V 3V
t t
6951
4,7V 8,2V
+A
BAS216
6950
BAV99
5,5V
14
3962
8
9
1,7V
1,4V
150K 7250-D
7
VOLTAGE
74LV14
DOUBLER
14
F955
3970
10
7950
1,4V 0R
7250-E
7
74LV14
1
to 7350-PART2
HP_ON
2
+3
3,1V
3953 3
DM
1,6V
10K
4
0,2V
5
2,2V
6
RA
1,6V
7
+3
0,7V
8
+3
1,2V
9
7956-B
8
3,1V
LM2904
7 10
1,5V 1,5V
F956
11
4
1,5V 0,2V
12
1,1V
13
0,7V
14
FO
1,4V
15
1,0V
16
0,7V
17
SL
1,6V
18
10 11 12
F951 H14 I250 A8
F952 F14 I251 A8
F953 F14
F954 E14
F955 E10
F956 G11
13 14
F255
+A
A
5251 F256
+3
3,1V 10u
2260X
47p
4,5V
3,1V
1 6254
B
TL431ACD
4
8
5
3V
2 3 6 7
0,5V
C
D
MPC17A50VM
to 7807-PART2
INNERSWITCH
36
E
9,1V
to/from VAM2103/08
2962
35
0,4V
470p
1951
F954
2957
34
0,2V 1
470p
33 A
F953 2
0,4V +
F952 3
12
32 M
-
0V 4
PH-B
F
31
+A
4,7V
30
0V
29
0V
28 TRACK-
10
0V
TRACK+
27
FOCUS-
0V
9
G
FOCUS+
26
0V
25
0,3V
to VAM2103/08
24
4,7V
1950
F950
23 2
-
0V
F951
11 1 S
22 +
0,5V
PH-B
21 2961 H
0,3V
470p
20 2958
0,7V
470p
19
3,1V
13 14