Service manual

November 2001
Part No. 001-7240-001
8-6
D401
D402
D403
D404
R411
100k
R412
100k
R413
100k
R414
100k
D405
R402
47k
R401
47k
R404
47k
R403
47k
L5V
L5V
R415
100k
R416
47k
R409
100k
L5V
S10
*
S7
"7"
S4
"4"
S1
"1"
S11
"0"
S8
"8"
S5
"5"
S2
"2"
S12
"#"
S9
"9"
S6
"6"
S3
"3"
S13
"FCN"
(F1)
S14
"SYS"
(F2)
S15
"GRP"
(F3)
R440
Open
S0
S1
S2
S3
S4
R3
R2
R1
R0
KINT
Sw Batt Out
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Gnd
21
22
23
24
25
26
27
28
29
30
KEYR2
KEYS1
KEYS2
KEYS3
AMUT
Keypad Interrupt
RESET
MIC
KEYS4
MSO
KEYR1
RXD
KEYS0
KEYR0
L5V
Serial Clock
DISST
BKLED
T5C
KEYR3
AUDIO-VRIN
DISEN
TXD
PTT/Flash
BATT
GND
PTT/Flash
Gnd
Sw Batt
Gnd
Reset
UDC-Sense
Ext Spkr
RxD
Emer Sw
Batt
Audio-VR Out
Aux Sw
Gnd
Int Spkr +
Audio-VR In
TxD
Ext Mic
Int Spkr -
FCN Sw
UDC-Mic Sense
Q301
3906
R308
100k
Sw Batt
R307
4.7k
D901
R302
220
D902
D303
D305
D307
D309
D304
D306
D308
D310
R306
220
R305
220
R304
220
R303
220
R301
220
5
6
8
7
4
3
1
2
+
C111
22
R111
27k
C110
100pF
INTA +
INTA -
INTB +
INTB -
Gnd
Out B
Out A
Vcc
U102
NJM2073
+
C115
47
R112
47
C113
0.1
5
6
81
INTA +
INTA -
INTB +
INTB -
Gnd
Out B
Out A
Vcc
7
C103
0.01
R105
47
C105
0.1
R106
47
C106
0.1
C107
0.22
2
3
4
U101
NJM2073
+
C109
4.7
+
C102
4.7
C108
0.1
C101
0.1
Q101
BCX51
R107
100k
R101
100k
Sw Batt
Sw Batt
R108
47k
R104
47k
R109
22
R103
22
R102
47k
R110
47k
AMUTE
R116
47k
L5V
Q106
UMT3906
Q103
UMT3904
UDC SENSE
Q104
BCX51
EXTERNAL SPEAKER
AUDIO AMP
INTERNAL SPEAKER
AUDIO AMP
Sw Batt
KEYPAD
R408
100k
External Speaker
Internal Speaker +
Internal Speaker –
Sw Batt
Source
2
1
3
4
5
6
8
7
9
10
11
12
35
36
34
33
32
31
29
30
28
27
26
25
47 48 46 45 44 43 41 42 40 39 38
37
14 13 15 16 17 18 20 19 21 22 23
2
1
3
4
5
6
8
7
9
10
11
12
24
14 13 15 16 17 18 20 19 21 22 23 24
35
36
34
33
32
31
29
30
28
27
26
25
R501
100k
C501
1800pF
R502
47k
R508
3.3k
R505
3.3k
R506
3.3k
R503
3.3k
R504
12k
RT509
47k
C502
0.1
2
1
3
4
5
6
8
7
9
10
11
12
14
13
15
16
17
18
20
19
21
22
31
32
30
29
28
27
25
26
24
23
43
44
42
41
40
39
37
38
36
35
34
33
35
36
37
35
32
31
27
28
24
23
34
21
19
20
16
15
12
11
7
8
4
3
37
38
35
33
30
38
29
22
26
25
1
22
17
18
14
13
10
9
6
1
5
2
EH1
AT4138AZR
P1/S1
P2/S2
P3/S3
P4/S4
P5/S5
P6/S6
P7/S7
P8/S8
S9
S10
S12
S11
S
2
3
S
2
4
S
2
2
S
2
1
S
2
0
S
1
8
S
1
9
S
1
7
S
1
6
S
1
5
S
1
4
COM1
COM2
V
L
C
D
C
O
M
3
C
O
M
4
V
D
D
V
L
C
D
1
V
L
C
D
2
V
S
S
O
S
C
_
I
N
H
C
E
C
L
D
I
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S
1
3
37
38
U501
LC75834W
LCD
LCD
DRIVER
U201B
TC4W66
C204
33pF
R203
33k
C203
0.22
R204
10k
Q202
DTC144
L5V
T5C
U201A
TC4W66
L5V
U5
Internal Mic
L5V
8
1
5
4
3
6
2
7
External Mic Audio
DISEN
DISST
MSCK
MSO
L5V
Source
T5C
Source
NC
NC
Audio-VR Out
External Mic
Mute
Internal Mic
Mute
MIC MUTE
DISPLAY/KEYPAD
BACKLIGHT
J801
To J2
L
ogic Board
J802
To Fle
x
Circu
it
Q102
UMT3904
Q105
UMT3904
R115
27k
+
C104
4.7
R311
0
R310
100k
Q302
UMT3904
R202
22k
R201
100k
L5V
Q404
UMT3904
L5V
Q201
DTC144
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
+
C205
10
R205
12k
R117
0 (Not Used)
C202
0.1
R207
2.7k
C206
1
R206
12k
R208
2.7k
Q401
DTA123
Q402
DTA123
Q403
DTA123
+
C207
1
DISPLAY/KEYPAD BOARD SCHEMATIC