DR600 Service Manual
programming cannot be completed, changing NAND FLASH (U7)
for a second modulation and changing the parameter settings is
suggested.
2. Check the DC power supply of the processor unit below:
3V3_OMAP
1V2_OMAP
1V8_DDR
3. Check the DC power supply of the FPGA unit below.
VCCINT(1.2V)
VCCD_PLL(1.2V)
VCCA(2.5V)
VCCIO(3.3V)
4. Check the baseband board 12.8M clock (Y5) and 24M
clock(Y2).
11
Network connection
Fails
1. Check the cable connecting status.
2. Check the internet card chip power.
3. Check the 50M clock of the internet card chip.
12
No voice repeated
Please check Pin2 of transmit unit connector (J17). If there is no
modulation signal, please check reference voltage VREF (2.048V)
of DAC output from U29. If the VREF voltage is abnormal, please
change U29. If VREF is normal, please check DAC (U24).
13
No voice outside the
mode.
1.
Check the connecting status of ACCY connecting cable and
connector (U9).
2. Check the 18.432MHz clock of CODEC and power of 3VE_A,
3V3_OMAP. Please input 1KHz and 50mV testing audio signal on
the TXAF test point of baseband board, and check the transmitting
deviation from Comprehensive test instrument. If the deviation is
abnormal, please change CODEC chip (U30).
14
Abnormal
Programming
1. Check the connecting status of network connector (J12) and
network cable.
2. Check the network card running status of PC.
3. Check 50M clock(J23) of network connector on baseband.
4. Check prompt content on the programming running print
information and make the corresponding judgment.
49
Содержание DR600
Страница 1: ......
Страница 37: ...DR600 Service Manual 33 ...
Страница 109: ...DR600 Service Manual Appendix 2 PCB View and Schematic Diagram Figure 1 Rx Module Top Board PCB View 105 ...
Страница 110: ...DR600 Service Manual Figure 2 Rx Module Bottom Board PCB View 106 ...
Страница 111: ...DR600 Service Manual Figure 3 Tx Module Top Board PCB View 107 ...
Страница 113: ...DR600 Service Manual Figure 6 Baseband Mainboard Top Board PCB View 109 ...
Страница 114: ...DR600 Service Manual Figure 7 Baseband Mainboard Bottom Board PCB View 110 ...
Страница 115: ...DR600 Service Manual Figure 8 Front Panel Top Board PCB View Figure 9 Front Panel Bottom Board PCB View 111 ...
Страница 116: ...DR600 Service Manual Figure 10 Power Board Top Board PCB View 112 ...
Страница 117: ...DR600 Service Manual Figure 11 Accessory Board Top Board PCB View Figure 12 Accessory Board Bottom Board PCB View 113 ...
Страница 118: ...DR600 Service Manual Figure 13 Enternet Board Top Board PCB View 114 ...
Страница 119: ...DR600 Service Manual Figure 14 Enternet Board Bop Board PCB View 115 ...
Страница 150: ...DR600 Service Manual Figure 21 Baseband Mainboard Schematic Diagram 146 ...