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b) Check LCD and the connector and antenna connected between P10-3340 PCB and
P10-3300 PC. If it is defective, it should be replaced.
13-4 NBDP SN-100
As SN-100 is NBDP terminal, error can happen on transceiver, power supply, CPU BOARD,
LCD. When error happens, please check as follow.
1. POWER
①
Power is not working.
- 24V is supplied only when power supply is connected to SRG-150DN/250DN.
If there is something wrong, check the power supply switch, the connector cable to
SRG-150DN/250DN, fuse (5A), power polarity.
②
Power is not working.
- Firstly, check the +12V on U8 of T-025, +5V on DC-DC CONVERTER and then, check
power supply cable that is connected power supply board and screen. If +12V is not
supplied, LCD, CPU BOARD is not operated. If +5V is not supplied, CPU BOARD is not
operated.
2. SCREEN DISPLAY
①
Screen is not turned on.
- Check if power is correctly supplied to LCD.
②
Screen is waved or there is white line on the screen.
- If the condition of the connect point of LCD connector or of LCD board are bad,
connector and board should be cleaned with detergent material that is volatile.
3. NBDP DATE RECEIVING
①
Can
’
t receive the data
- Firstly check if Antenna is correctly connected.
- Check if 12V is generated on U1 of T-025.
- Check if SRG-150DN/250DN can receive the W/K signal.
If SRG-3150DN does not receive W/K signal, check the third pin (IC4 of T-132) is
approximately 3.2V (+ 3.2V is normal). And, check 1
ST
, 2
ND
, BFO is supplied.
- Check that 1.7 kHz
±
85Hz on CN8 of T-132 is generated.
- Check that DOT/PATTERN signal on 13th of U9 of T-130 is generated.
- Check that DOT/PATTERN signal on 18th of IC3 of T-130 is generated.
4. NBDP DATA TRANSMITTING
①
Data is not transmitted