Raymarine RAY230E Owner's Handbook Manual page 122

5-10
12
Poor or no
modulation (TX)
13
Hailer inoperative
a.Check IDC inp level at pin 15 of J2 +/-
3 kHz dev: 155 mV typ.
b. Check IDC output and VR3
c. Check handset mic line ouput: +/- 3
kHz dev: 155 mV typ.
d. Check cross-point SW (IC315) and
analog SW (IC311) on CPU PCB
e.Check VCOf. Defective/device
1) Handset: Mic, IC704-705, C717
2) CPU PCB: IC311, IC315, IC319-321
CPU (IC305)
3) RF PCB: IC6, VR3, VCO
a.Check Relay: RL301
Make: Talk, Break: Listen
b. Check Hailer Speaker and wiring
c. Check AF PA output: 10W at 4 ohm
d. Check AF level cross-point (IC315)
output to AF PA input
Maintenance