TR850 Service Manual
5
GPS cannot locate.
1. Check if the GPS settings are right. If not, Please reset it.
2. The antenna may be put in a close place, please put it in a
open place and relocate.
6
LED lights fail to
lightup on the the
front panel.
1. Check 13.6VDC input or 100-220VAC input and the connector
status on the power board.
2. Check the protective tube inside the socket if it is AC input.
3. Check the baseband board input voltage 13.6V and 3V3_OMAP
indicator light (LED6).
4. Check the status of front board interface and the flat cable.
7
Fails to be powered
on.
1. Check the power indicator on the front panel.
2. Check 13.6VDC input or 100-220VAC.
3. Check the baseband board input voltage 13.6V and
3V3_OMAP indicator (LED6).
4. Check the DIP switch (J4) code location on the side of
baseband board, and it should be in the start mode normally (1, 2,
3, off).
5. Check the baseband board OMAP 24M clock(Y2).
6. Connect the serial port (J23), and check the programming
printing information. Chec k if the program is loaded successfully
based on the print information and if the chip is initialized correctly.
8
The lights on the
baseband fail to light
up.
Check if the DC input port voltage is 13.2V, check whether
DCDC (U1) input is 13.2V if the voltage is right, if not, please
change the fuse F1. Or check if U1 output is 5V, if not, check U1
periphery or change U1. Or check PMU (U2) or change U2.
9
The alarm red light is
on or blinking on the
front panel after
powering on.
1. Check the flat cable between Tx module and Rx module.
2. Check Tx module interface (J17) and Rx module
interface(J15).
3. Check if the baseband board 12.8MHz clock output interface
(J6 or J7) is normal.
10
FPGA operating
LED is abnormal.
1. Check the status of the four lights (LED2, LED3, LED4,
LED5) beside the baseband board FPGA (U14), and check the
operating status of OMAP and FPGA. Normally, 20 seconds after
powering on, LED3 lights up, and LED2 and LED4 blinks
simultaneously, indicating the program is loaded successfully from
NAND; after another 40 seconds, LED3 and LED4 Lights up, and
LED2and LED5 blinks simultaneously, indicating CPU and FPGA
are started. If the program keeps failing on loading or starting,
please connect to the JTAG port (J2) to connect to the OMAP
simulator inspection program or reburn the program. If the burning
53
Summary of Contents for TR850
Page 1: ......
Page 45: ...TR850 Service Manual 5 4 Connection 1 2 3 4 6 8 7 5 9 10 13 14 15 16 18 17 11 12 41 ...
Page 90: ...TR850 Service Manual Figure 1 Rx Module Top Board PCB View 86 ...
Page 91: ...TR850 Service Manual Figure 2 Rx Module Bottom Board PCB View 87 ...
Page 93: ...TR850 Service Manual Figure 5 Power Amplifier Module Bottom Board PCB View 89 ...
Page 94: ...TR850 Service Manual Figure 6 Baseband Mainboard Top Board PCB View 90 ...
Page 95: ...TR850 Service Manual Figure 7 Baseband Mainboard Bottom Board PCB View 91 ...
Page 97: ...TR850 Service Manual Figure 10 Power Board Top Board PCB View 93 ...
Page 114: ...TR850 Service Manual Figure 16 Baseband Mainbaord Schematic Diagram 110 ...
Page 169: ...TR850 Service Manual Figure 1 Rx module Top Board Position Mark Diagram 165 ...
Page 170: ...TR850 Service Manual Figure 2 Rx Module Buttom Board Position Mark Diagram 166 ...
Page 172: ...TR850 Service Manual Figure 5 Power Amplifier Module Buttom Position Mark Diagram 168 ...
Page 173: ...TR850 Service Manual Figure 6 Baseband Mainboard Top Board Position Mark Diagram 169 ...
Page 174: ...TR850 Service Manual Figure 7 Baseband Mainboard Buttom Board Position Mark Diagram 170 ...
Page 176: ...TR850 Service Manual Figure 10 Power Board Top Board Position Mark Diagram 172 ...
Page 193: ...TR850 Service Manual Figure 16 Baseband Mainboard Schematic Diagram 189 ...
