Kenwood NX-200 Service Manual page 37

When a normal
condition is confirmed.
Verify the GPS data (TXD).
R10: High (3.3V)
When a normal
condition is confirmed.
[The GPS IC is abnormal]
Replace the SUB (GPS) unit.
■ Descriptions of signal names
1) 5A : GPS block power supply (from TX-RX unit)
2) 33C : GPS block host I/F 3.3V power supply
3) OPT5 : GPS power supply control (ASIC to GPS AVR)
4) TXD, TXD1 : GPS control serial data (ASIC to GPS IC)
5) RXD, RXD1 : GPS NMEA serial data (GPS IC to ASIC)
TROUBLE SHOOTING
When an abnormal
condition is confirmed.
Verify the state of the TXD1 line.
[The ASIC IC is abnormal]
Verify the state of the ASIC
(IC108 (CONT)).
When an abnormal
condition is confirmed.
When a normal
condition is confirmed.
→
HIGH ON
NX-200(G)
[The TXD1 line circuit is faulty]
Replace any abnormal parts.
37