Pacer Ic U601 - Motorola StarTAC 3000 Service Manual

StarTAC 3000:
B +
SPEAKER OUT-
J1-6
page B-24
SPEAKER OUT+
J1-7
page B-24
C607
J800
ON OFF-SENSE
CR942
7
page B-15
WATCHDOG
U700-55
9
page B-18
RESET
REF 2.75V
REF2.75 DRV
Q620
page B-12
LOGIC 2.75V
Q630
page B-12
R620
L2.75 DRV
REF 4.75
REF4.75 DRV
Q610
page B-12
J800
BATT+ SENSE
22
U800-26
page B-19
B+ SENSE
U800-21
18
page B-19
BATT MON
CR631
page B-15
CHARGER DAC
U520-10
page B-9
CH_I_SNS
R1012
page B-15
EXT B+
J3-14
page B-13
J800
EXT OUT
U700-44 31
page B-18
This manual is Motorola property. Copying or
distribution strictly prohibited without prior written
consent from Motorola and must be returned upon
Motorola's request.
Motorola Confidential Proprietary

Pacer IC U601

R664
R662
C660
C652
R665
R651
R607
12 11 10 9 8 7 6 5 4 3
0.10V 13 MOB SENSB
2.76V 14 ON OFFSB
2.76V 15
2.76V EXT OUT
16
1.60V 17
U601
2.75OUT
2.77V 18
R621
2.75DRV
3.08V
19
2.77V 20
3.08V 21
4.82V 22
4.89V 23
0.00V 24
25 26 27 28 29 30 31 32 33 34
C662
RX SIGNAL
VOLTAGE SUPPLIES
Colored boxes represent the area in
which the components are placed.
Battery
External No
Supply Headset
Supply Headset
.5V 2.7V 0V 2.75V
B A
BOOM SPKR
C605
NC
2 1
48 1.5V
47 2.75V R609
46 2.9V
45
1.60V
EXT IN
44
1.59V
C635
43
1.9V
42
3.73V
41 2.72V
40 2.76V
39 1.57V
0.00V
38
0.03V
37
36
35
U601
J800
C622
AUDIO CNTL
C645
HEADSET EN
HC11-VRH
3-SEC
B_I_SNS
B_DRV
160 KHZ CLK
PCPUMP
NCPUMP
SPKR OUT
AUDIO_OUT
CR670
CH OUT
ON OFF
B
BATT PWR SNS
J600-3
J800
40
Q681
page B-16
A
Q680
19
page B-16
B+
J800
40
U800-30
page B-19
R1042
19
page B-19
Q635
page B-12
Q635
page B-12
BOOST B+
J800
page B-12
21
U700-22
page B-18
Q636
page B-12
Q636
page B-12
J800
27
U700-43
page B-18
J3-9
page B-24
Q632-4
page B-15
J800
1 R990
page B-15
5 U800-69
page B-19