Check radio speaker operation

Check 5570TE

Irrespective of the position of the key, switch on the radio by pressing the 'VOL PUSH ON/OFF knob (A) for more than a second.

Acoustic test at the speakers

After the radio has been switched on, press buttons '3' (B) and '6 RND (C) at the same time to activate the acoustic self test function at the speakers. The test is carried out individually for each audio channel sending 'high' and 'low' tones. The writing corresponding to the speaker selected will appear on the radio display.

E.g. LF WOOFER SPEAKER (left front Woofer speaker)

Each time the writing appears on the display, check that the acoustic signal for the speaker being tested shown on the display can be heard. then press the '>>' button (D) to continue the check at the other sound sources.

Diagnosis of short circuit (audio channels and radio aerial) and open circuits (radio aerial).

Press buttons '3' (B) and '6 RND (C) at the same time. The acoustic test at the speakers has started. Press button '6 RND (C) again and check that the words 'SHORT CIRCUIT - OK appear on the display.

If there is a short circuit at one or more of the speakers, a list of components will appear on the display with an X at the side indicating the faulty speaker. The presence of a mark indicates that the channel(s) is(are) not short circuited.

LF = left front audio channel

RF - right front audio channel

LR = left rear audio channel

RR = right rear audio channel

X = audio channel short circuited

Mark = audio channel not short circuited

Where several faults are present at the same time, the respective signals will be shown on the displayed alternately (rolling) lasting around 2 seconds for each message.

If the words 'AERIAL: GND SHORT appear, this indicates a short cirtcuit to earth at the radio aerial intake;

If the words AERIAL: BATT. SHORT appear, this indicates a short circuit to the battery positive at the radio aerial intake;

If the words 'AERIAL: OPEN CCT appear, this indicates an open circuit to the radio aerial intake.