Radio CDR23
| Work instruction | Yes | No | |
|---|---|---|---|
| 1 | Switch on ignition and radio. Measure voltage at positive connection of antenna amplifier. Voltage is 10 - 14 V? |
==> Step 5 | ==> Step 2 |
| 2 | Check the voltage of the line to the roof/rear lid connection point. Voltage is 10 - 14 V? |
==> Step 5 | ==> Step 3 |
| 3 | Pull connector A off radio and check voltage at pin A 5. Voltage is 10 - 14 V? |
==> Step 5 | Check radio ==> End |
| 4 | Check positive cable to antenna amplifier for ground short. Ground short is present? |
Repair or replace line. ==> End |
==> Step 5 |
| 5 | Check screw connections of ground lead and check that ground plate is seated correctly. | ==> Step 6 | Tighten ground strap and ground plate. ==> End |
| 6 | Check ground strap for open circuit. Open circuit is present? |
Repair ground strap. ==>End |
==> Step 7 |
| 7 | Check for short circuit in HF conductor (internal conductor) of antenna lead, which provides shielding between radio and antenna amplifier. Short circuit is present? |
==> Step 6 | Disconnect plug connection of antenna lead to rear lid at the back of the roof. Check sections of lead to the antenna amplifier and to the radio for short circuit between internal conductor and shielding. Replace damaged sections of lead. |
| 8 | Check for open circuit in HF conductor (internal conductor) of antenna lead between radio and antenna amplifier. | Check radio and antenna amplifier. ==> End |
Disconnect plug connection of antenna lead to rear lid at the back of the roof. Check sections of lead to the antenna amplifier and to the radio for open circuit. Replace section of lead with open circuit. ==> End |