Motorola XTS 2500 Service Manual page 910

Index-2
power-up self-check error codes . . . . . . . . . . . . . . . . 5-3
power-up, self-check diagnostics and repair . . . . . . . 5-4
procedures, troubleshooting . . . . . . . . . . . . . . . . . . . 5-1
R
radio
board layouts . . . . . . . 9.1-1, 9.2-1, 9.3-1, 9.4-1, 9.5-1
interconnect block diagram . . . . . . . . . . . 9.1-2, 9.2-2
overall characteristics 2.1-1, 2.2-1, 2.3-1, 2.4-1, 2.5-1
parts list . . . . . . . . .9.1-29 to 9.1-38, 9.1-39 to 9.1-49,
9.1-49 to 9.1-59, 9.2-38 to 9.2-48,
9.2-48 to 9.2-58, 9.2-58 to 9.2-68,
9.3-31 to 9.3-40, 9.4-24 to 9.4-31,
9.4-31 to 9.4-39, 9.4-39 to 9.4-50,
9.5-26 to 9.5-36, 9.5-36 to 9.5-47
power down . . . . . . . . 3.1-1, 3.2-1, 3.3-1, 3.4-1, 3.5-1
power up . . . . . . . . . . 3.1-1, 3.2-1, 3.3-1, 3.4-1, 3.5-1
schematics . . . . . . . . 9.1-1, 9.2-1, 9.3-1, 9.4-1, 9.5-1
radio board ordering information . . . . . . . . . . . . . . . .A-1
receiver
front end theory . . . . . 4.1-3, 4.2-3, 4.3-3, 4.4-3, 4.5-3
replacement parts ordering
mail orders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
S
schematics . . . . . . . . . . 9.1-1, 9.2-1, 9.3-1, 9.4-1, 9.5-1
signal tracing procedures . . . . . . . . . . . . . . . . . . . . . 5-1
SRAM U403 pinout . . . . . . . . . 8.2-6, 8.3-6, 8.4-6, 8.5-6
SRAM U804 pinout . . . . . . . . . . . . . . . . . . . . . . . . 8.1-6
standard bias table . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
supply voltages, standard . . . . . . . . . . . . . . . . . . . . . 5-2
symbol
caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
danger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
system clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
T
theory of operation
Abacus IC U401 . . . . . . . . . . . . . . 4.1-3, 4.2-4, 4.3-4
antenna switch
receive mode . . . . . . . . . . . . . . . 4.1-2, 4.2-2, 4.3-2
transmit mode . . . . 4.1-2, 4.2-2, 4.3-2, 4.4-2, 4.5-2
frequency synthesis . 4.1-1, 4.2-1, 4.3-1, 4.4-1, 4.5-1
receiver
front end . . . . . . . . 4.1-3, 4.2-3, 4.3-3, 4.4-3, 4.5-3
troubleshooting charts
button test . . . . . . . . . 6.1-9, 6.2-9, 6.3-9, 6.4-9, 6.5-9
DC supply fail . . . . . . 6.1-6, 6.2-6, 6.3-6, 6.4-6, 6.5-6
listing . . . . . . . . . . . . . 6.1-1, 6.2-1, 6.3-1, 6.4-1, 6.5-1
no display . . . . 6.1-13, 6.2-13, 6.3-13, 6.4-13, 6.5-13
no transmit deviation . .6.1-21, 6.2-21, 6.3-21, 6.4-21,
6.5-21
radio power-up fail . . . 6.1-3, 6.2-3, 6.3-3, 6.4-3, 6.5-3
top/side button error . .6.1-12, 6.2-12, 6.3-12, 6.4-12,
6.5-12
volume set error 6.1-10, 6.2-10, 6.3-10, 6.4-10, 6.5-10
troubleshooting procedures
handling precautions . . . . . . . . . . . . . . . . . . . . . . . 5-1
power-up self-check error codes . . . . . . . . . . . . . . 5-3
February 14, 2012
power-up, self-check diagnostics and repair . . . . 5-4
radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
signal tracing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
standard bias table . . . . . . . . . . . . . . . . . . . . . . . . 5-2
system clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
voltage measurements . . . . . . . . . . . . . . . . . . . . . 5-1
troubleshooting tables
FLASH U402 pinout . . . . . . .8.2-3, 8.3-3, 8.4-3, 8.5-3
FLASH U803 pinout . . . . . . . . . . . . . . . . . . . . . . 8.1-3
main board to key flex assembly J601 . . 8.1-1, 8.2-1,
8.3-1, . . . . . . . . . . . . . . . . . . . . . . . . . 8.4-1, 8.5-1
main board to universal (side) connector flex assembly
J601 . . . . . . . . . .8.1-3, 8.2-3, 8.3-3, 8.4-3, 8.5-3
Patriot MCU/DSP U401 pinout . . . 8.2-7, 8.3-7, 8.4-7,
8.5-7
Patriot MCU/DSP U800 pinout . . . . . . . . . . . . . . 8.1-7
SRAM U403 pinout . . . . . . .8.2-6, 8.3-6, 8.4-6, 8.5-6
SRAM U804 pinout . . . . . . . . . . . . . . . . . . . . . . 8.1-6
troubleshooting waveforms
16.8 MHz buffer input and output . . . . 7.1-36, 7.2-37,
7.3-36, 7.4-39, 7.5-39
1st LO control voltage 7.1-18, 7.2-18, 7.3-18, 7.4-19,
7.5-19
2nd LO control voltage 7.1-31, 7.2-32, 7.3-31, 7.4-34,
7.5-34
2nd LO VCO buffer output . . . 7.1-32, 7.2-33, 7.3-32,
7.4-35, . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5-35
32.768 kHz clock outputs . . . . 7.1-37, 7.2-38, 7.3-37,
7.4-40, . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5-40
abacus analog 3V . . . 7.1-30, 7.2-31, 7.3-30, 7.4-33,
7.5-33
abacus digital 3V . . . . 7.1-34, 7.2-35, 7.3-34, 7.4-37,
7.5-37
analog 5V . . . . 7.1-24, 7.1-33, 7.2-25, 7.2-34, 7.3-24,
7.3-33, . . . . . . . . . .7.4-27, 7.4-36, 7.5-27, 7.5-36
antenna input . . . . . . .7.1-6, 7.2-6, 7.3-6, 7.4-6, 7.5-6
antenna switch bias . . 7.1-22, 7.2-23, 7.3-22, 7.4-24,
7.5-24
coupler RF feedback to PCIC
7.4-10, 7.5-10
coupler RF out . . . . . .7.1-8, 7.2-8, 7.3-8, 7.4-8, 7.5-8
crystal filter out .7.1-29, 7.2-30, 7.3-29, 7.4-32, 7.5-32
frequency out (16.8 MHz) . . . 7.1-20, 7.2-21, 7.3-20,
7.4-22, 7.5-22
higher level voltage multiplier . 7.1-13, 7.2-13, 7.3-13,
7.4-13, 7.5-13
list . . . . . . . . . . . . . . . .7.1-1, 7.2-1, 7.3-1, 7.4-1, 7.5-1
low-noise amplifier output . . . 7.1-26, 7.2-27, 7.3-26,
7.4-29, 7.5-29
mixer out (IF) . .7.1-28, 7.2-29, 7.3-28, 7.4-31, 7.5-31
mod in . . . . . . .7.1-17, 7.2-17, 7.3-17, 7.4-18, 7.5-18
PA control voltage . . . . 7.1-11, 7.2-11, 7.3-11, 7.4-11,
7.5-11
prescalar input to FracN synthesizer . 7.1-15, 7.2-15,
7.3-15, . . . . . . . . . . . . . . . . . . . . . . 7.4-16, 7.5-16
preselector 1 output . . 7.1-25, 7.2-26, 7.3-25, 7.4-28,
7.5-28
preselector 2 output . . 7.1-27, 7.2-28, 7.3-27, 7.4-30,
7.5-30
preselector tuning voltage . . . 7.1-23, 7.2-24, 7.3-23,
7.4-25, . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5-25
reference crystal output . . . . . 7.1-16, 7.2-16, 7.3-16,
7.4-17, 7.5-17
RX RF input after antenna switch . . . . 7.4-26, 7.5-26
Index
7.1-10, 7.2-10, 7.3-10,
6816985H01-F