Raymarine Ray 106 User Manual - page 32
b. Check the battery voltage.
c. Check the connector connection.
d. Defective regulator IC106.
2
NO sound from speaker
a. Defective speaker (SP101).
b. Defective IC104 and/or assoc. components(C118,
etc)
c. Defective speaker ON control circuit (Q102, Q103).
d. Defective volume control.
e. Defective mute circuitry (Q105).
3.
Squelch circuit inop
a. Check squelch control.
b. Defective IC201 and/or associated circuitry between
pins 7 and 9.
4.
No receive (RX)
a. Defective regulator IC106.
b. Defective Q110 (RX+B).
c. Check IC201 audio output voltage at pin 9.
d. Defective audio signal buffer Q201,Q202.
e. Check XTL201 output for 21.145 MHz signal.
f. Check 21.6 MHz output of X’tal filters F301and F302.
g. Check 21.6 MHz output of first IF amplifier Q15.
h. Check 455 KHz signal form ceramic filter F20.
i. Failure of VCO circuit (VCO1, PLL IC, IC3, Q9, Q10,
Q11, Q12 and/or other associated circuitry.
j. Defective CPU.
5.
Low receiver sensitivity
a. Check antenna and connector for possible
corrosion or bad connection.
b. BPF, Q8 and/or associated circuitry.
c. Output of Q9 and/or associated circuitry.
d. Output of VCO1 Pin 3.
6
CPU inoperative
a. Turn off the power once, and try again.
b. Check CPU clock frequencies (pins 70 and 71 of
IC101).
c. If clock frequency is not present, check for+5 Vdc
line.
7
Display malfunction
a. check the interconnection to the LCD display.
b. Inoperative CPU.
8
No transmit (TX)
a. Defective PTT switch.
b. Defective regulator IC106.
c. Defective Q108 (TX+B).
d. Check power transmit circuit (Q6, Q5, and/or IC1)
e. Failure of VCO circuit (VCO1) or PLL IC3.
f. Check PLL control voltage for 2.3 V at Pin 2 of VCO1 on
channel 16.
g. Failure of TX mute circuit (IC2 and/or associated circuit
).
h. Failure of talk detection circuit (D3).
Table 5-3 TROUBLESHOOTING CHART
Item
Symptom
Possible Cause
9
Low RF power output
a. Check RF power output from IC1 pin 4.. If it checks