Chapter 3 Theory Of Operation; Control Head Board; Control Head Board Major Sections - Motorola ASTRO XTL 1500 Detailed Service Manual

Chapter 3 Theory of Operation

3.1

Control Head Board

This section provides a detailed circuit description of the XTL 1500 radio control head board for VHF/
UHF Range 1/UHF Range 2/700–800 MHz models. The control head board contains the following
major sections:
• Controller
• Power Management
• User Interface
• GCAI Accessory Interface
When reading the theory of operation, refer to your appropriate schematic and component location
diagrams located in
detailed Theory of Operation will help isolate the problem. However, first use the ASTRO Digital
XTL 1500 VHF/UHF Range 1/UHF Range 2/700–800 MHz Mobile Radio Basic Service Manual
(6815853H01) to troubleshoot the problem to a particular board.
3.2

Control Head Board Major Sections

This section contains the control head board layouts for XTL 1500.
The illustrations
sections of the control head board.
TPS65012
PWR MGT IC
C2105
TP_2.8V
E2102
24
36
C2100
U2100
TP_1.88V
E2101
12
R2132
TP_3.3V
R2108
C2104
C2103
L2100
E2100
R2201
TP_1.55V
R2216
VR2201
R2215
GROUND_3
Q2201
VR2202
SW_B+
CONTROLS
(page 3-2)
(page 3-3)
(page 3-7)
(page
"Chapter 7. Schematics, Component Location Diagrams, and Parts
(Figure 3-1 on page 3-1
5V
SWITCHING
REGULATOR
FACTORY
BOOT
SH2200 TP_SW_5V
GROUND_2
R2139
R2211 L2201
8
5
Q2100
4
R2204
R1066
VBUS_SRC
R2208
Q2200
R2205
4 1
C2205
9
C2204
U2200
5
R2203 8
R2206
R2200
C2200
G1
L2200
C2201
GROUND_1
BATTERY_A+
Figure 3-1. XTL 1500 Control Head Board Sections — Side 1
3-7)
to Figure 3-2 on page
OMAP
CONFIG.
LCD CONN.
R4208
10 C4211
1
U1007
R4218
U1002
C4209
R4219
U1008
R4216
C4212 R4207
11 20
C4208
R4217
TP_UNSW_2.8V
C4210
R4215
R4213
R1051 C1031
C4206 R4211
R1068
R1049 R1053
C1038 C4204
R1027 R1023 R1058
R1055
R1005
R1028 R1024 R1030
R1026 C1027
R1059
R1065 R1064 R1056 C1032
R1047 R1052
R1046
R1031 R1022 R1025 R1029
R1002
C1026
R1057 R1006 R1007
R1054
TP_PB5
R1069 R1003
R1048
TP_PB1
TP_IGNiTION
R1214
R1215
2 70
J5000 G2
1
69
D1001
R1041
D1000
VIPOUTs AVR PROG
CONN.
3-2) identify the location of the major
USB 5V
CURRENT
LIMITER
UNSW VCC
R2202
R3102
C3103
TP_VBUS_MODE_SEL
5
3
R3121 4
TP_VBUS_OC_DET
8 5
U3101
1
4
R2213
R2214
Q3100
TP_MUX_EN
C3102
TP_MUX_SEL
C3203
R3212
R3219
R3213
U3200 C3204
C3202
R1216
R3216
R3214 R2129
TP_5V_EN
R1217 R3218
R1213
C1201
TP_ON_OFF_2
C4201
R4204
R4205
10
1
U1200
11 20
VOLUME
CONN.
Lists". This
TP_USB_DP
TP_USB_DM
TP_USB_VBUS
VR3200
RX AUDIO
OP AMP
VR3202
TP_PB2
TP_ON_OFF_1