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9.3-16
UHF2 Schematics, Board Overlays, and Parts Lists
August 16, 2007
6816985H01-B
Figure 9.3-15. PMLE4427A/ PMLE4427B Regulators Schematic
drive ABACUS regulator from 5V supply
PLACE L500 and C509 CLOSE TO CONTROLLER
Remove L502 and place R521 to
NP
NP
NP
C518
3
VEN
VIN
1
VOUT
5
10uF
LP3985
BYPASS
4
D
N
G
2
LP3985
BYPASS
4
D
N
G
2
3
VEN
VIN
1
VOUT
5
U502
C541
U501
C540
270pF
D513
270pF
D512
D510
C527
330pF
330pF
C526
330pF
C525
0
1uF
R528
1uF
C517
1uF
C506
10uF
C516
R521
C514
0
R524
0
BYPASS
1
7
ERROR
3
D
N
G
4
INPUT
NC
2
5
OUTPUT
6
SENSE
8
SHUTDOWN
LP2989
*U500*
100uH
L502
0.1uF
C511
0.1uF
C512
330K
R520
0
R527
D511
C513
10uF
NC
0.1uF
C510
.01uF
C521
C523
.01uF
.01uF
C522
VSW1
POR
ABACUS_3V
RESET_OUT
SW_B+
ANA_5V
ANA_3V
Summary of Contents for ASTRO MT 1500
Page 4: ...iv Table of Contents August 16 2007 6816985H01 B Notes ...
Page 164: ...August 16 2007 6816985H01 B 5 6 Troubleshooting Procedures Operational Error Codes Notes ...
Page 188: ...August 16 2007 6816985H01 B 6 1 24 VHF Troubleshooting Charts Secure Hardware Failure Notes ...
Page 212: ...August 16 2007 6816985H01 B 6 2 24 UHF1 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 236: ...August 16 2007 6816985H01 B 6 3 24 UHF2 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 710: ...9 2 40 UHF1 Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Page 806: ...9 5 32 900MHz Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Page 816: ...Index 4 August 16 2007 6816985H01 B Notes ...
Page 817: ......