229

(3) Tweeter speaker assembly inspection

1

Disconnect speaker connector

2

Check resistance

Notice:

Do not remove the speaker during inspection.

Standard Value: 4

Ω

¸

Abnormal

Replace tweeter speaker assembly

NORMAL Check wire harness and connector

(4) Check front speaker assembly

1

Disconnect speaker connector

2

Check resistance

Standard Value: 4

Ω

¸

Abnormal: Replace front speaker assembly

Normal: Check wire harness and connector

(5) Check rear speaker assembly

1

Disconnect speaker connector

2

Check resistance

Standard Value: 4 ¸

Abnormal: Replace rear speaker assembly

Normal: Check wire harness and connector

(6) Check wire harness and connector

Abnormal: Repair or replace wire harness and connector

Normal: Check and replace radio assembly

(7) Check and replace radio assembly (+B, ACC, GND)

(a) Check the continuity between terminals under each operating condition as shown in the table below.

Standard:

(b) Check the voltage between terminals under each operating condition as shown in the table below.

Standard:

Normal: Repair or replace wire harness and connector

Abnormal: Check and replace radio assembly

Tester connection

Condition

Standard Status

GND

Constant Status

Continuity

Tester Connection

Condition

Standard Status

+B - GND

Constant Status

10～14V

ACC - GND

Ignition switch ACC or ON

10～14V

Ω

230

4. Unable to receive radio broadcast (poor reception)

(1) Check if the radio auto-research function works

Perform the radio auto-research function to see if it works

Normal: Check and replace radio assembly

Abnormal: Check the antenna for noise

(2) Check the antenna for noise

1

Turn on radio to AM with the ignition switch ACC.

2

Touch the antenna of the seated antenna assembly with the tip of the screwdriver. Check the speaker for

noise.

Standard: There is noise

Normal: Check and replace radio assembly

Abnormal: Check antenna assembly

(3) Check antenna assembly

1

Remove the antenna plug from the antenna assembly

2

Check for noise

Connect the radio assembly connector and turn the ignition switch to ACC.

Turn on the radio to AM

 Insert a flat pan screwdriver or metal object similar to thin wire into the hole in the antenna coaxial

cable. Check the speaker for noise.

Standard: There is noise.

Normal: Check and replace radio assembly

Abnormal: Check and replace antenna coaxial cable sub-assembly

5. Cassette tape can not be inserted or played.

(1) Check for foreign object

Check the radio assembly and cassette recorder for foreign object or defect.

Abnormal: Clean foreign object

Normal: Check cassette tape

(2) Check cassette tape

Check if the cassette tape is used to record music or sound.

Replace the tape with another tape and re-check if it is faulty.

(3) Replace it with another tape and re-check

Replace the faulty tape with working tape to see if the same fault will re-occur.

Standard: The function is normal

Normal: The tape is faulty

Abnormal: Check if the radio auto-research function works

231

(4) Check if the radio auto-research function works

Perform the radio auto-research function to see if it works

Standard: The operation works.

Normal: Check and replace radio assembly

Abnormal: Check radio assembly (+B, ACC, GND)

(5) Check the radio assembly (+B, ACC, GND)

1

Check the continuity between terminals under each operating condition as shown in the table below.

Standard:

2

 Check the voltage between terminals under each operating condition as shown in the table below.

Standard:

Abnormal: Repair or replace wire harness and connector

Normal: Check and replace radio assembly

6. The tape doesn't eject

(1) Press "EJECT" and check the operation

Press "EJECT" of the radio assembly. Check if the tape ejects.

Standard: The tape is ejected.

Abnormal: Check and replace radio assembly

Normal: Check cassette tape

(2) Check cassette tape

Check the ejected tape for trademark peeled off or tape box distortion or other issues

Standard: There is nothing wrong with the tape

Abnormal: There is something wrong with the tape

Normal: Replace it with another tape and re-check

(3) Replace it with another tape and re-check.

Replace the faulty tape with working tape to see if the same fault will re-occur.

Standard: The fault is cleared

Normal: There is something wrong with the tape

Abnormal: Check and replace the recorder assembly

Tester connection

Condition

Standard Status

GND

Constant Status

Continuity

Tester Connection

Condition

Standard Status

+B - GND

Constant Status

10～14V

ACC - GND

Ignition switch ACC or ON

10～14V

232

7. Poor sound quality only when playing tape

(1) Replace it with another tape and re-check

Replace the faulty tape with working tape to see if the same fault will re-occur.

Standard: The fault is cleared

Normal: There is something wrong with the tape

Abnormal: Check for foreign object

(2) Check for foreign object

Check the radio assembly and the cassette player for foreign objects or defects.

Abnormal: Clean foreign objects

Normal: Clean the magnet head and check operation

(3) Magnet Head Cleaning

1

Raise the cassette door with your finger. Next, using a pencil or similar object, push in the guide.

2

Using a cleaning pen or cotton applicator soaked in cleaner, clean the magnet head surface, pinch rollers

and tape press wheel.

3

Check if the same fault reoccurs.

Normal: The magnet head is dirty

Abnormal: Check and replace radio assembly

8. Tape jammed, malfunction with tape speed or auto-reverse

(1) Check for foreign objects

Check the radio assembly and tape player for foreign objects and defects

Standard: No foreign objects or defects

Abnormal: Clean foreign objects

Normal: Replace it with another tape and re-check

(2) Replace it with another tape and re-check

Replace the faulty tape with working tape (less than 90min) to see if the same fault will re-occur.

Standard: The fault is cleared.

Normal: There is something wrong with the tape

Abnormal: Clean the head

(3) Clean the magnet head

1

Raise the cassette door with your finger. Next, using a pencil or similar object, push in the guide.

2

Using a cleaning pen or cotton applicator soaked in cleaner, clean the magnet head surface, pinch rollers

and capstans.

3

Check if the same fault reoccurs.

      Normal: The head is dirty

      Abnormal:  Check and replace radio assembly