Page 407 - Workshop Manual - Aumark (BJ1051)

04-263
Diagnosis-audio system

Malfunction symptoms table

Use of the table below will help you find causes of problems. The SNs show possibilities sorting of
causes of problems. Check each part according to this order and replace as needed.
Symptom Suspected area Refer to

1. Power and ground circuits Chapter 04 Audio System-Audio
Audio unit does not work.
2. Audio unit itself Unit Does Not Work
1. In mute mode Operation Manual of the Audio
Speaker is soundless in all 2. Speaker circuit System (in Chinese and English)
modes. 3. Speaker Chapter 04 Audio System-Speaker Is
4. Audio unit itself Soundless In All Modes
4
Operation Manual of the Audio
1. Audio unit settings improper
Speaker tone quality is poor in all System (in Chinese and English)
modes. 2. Speaker circuit Chapter 04 Audio System-Speaker
3. Speaker
Tone Quality Is Poor In All Modes
1. Audio unit settings improper Operation Manual of the Audio
Speaker volume is low in all 2. Speaker circuit System (in Chinese and English)
modes. 3. Speaker Chapter 04 Audio System-Speaker
4. Audio unit itself Volume Is Low In All Modes
Chapter 04 Audio System-Speaker
Speaker tone quality is poor only 1. Tone quality of media source file poor Tone Quality Is Poor Only When
when playing CD or MP3. 2. Audio unit itself
Playing CD Or MP3
1. Peripheral interference of
Failure to receive radio broadcast electromagnetic wave too strong Chapter 04 Audio System-Failure to
Receive Radio Broadcast or
or reception is poor. 2. Antenna Reception Is Poor
3. Audio unit itself
CD can not be inserted/played or Chapter 04 Audio System-CD Can
immediately ejected after 1. CD recognition failure Not Be Inserted/Played or
2. Audio unit itself
inserted. Immediately Ejected After Inserted
Operation Manual of the Audio
System (in Chinese and English)
1. Use of unknown CD
CD can not be ejected. (Replacing audio unit)
2. Audio unit itself
Chapter 56 Audio System-Audio
Unit, Replacement
1. Tone quality of CD source file poor Chapter 04 Audio System-CD Sound
CD sound jump
2. Audio unit itself Jump

1. Format of audio source file incorrect Chapter 04 Audio System-MP3 Can
MP3 can not be loaded/played.
2. Audio unit itself Not Be Loaded/Played

1. Tone quality of media source file poor Chapter 04 Audio System-MP3
MP3 sound jump
2. Audio unit itself Sound Jump
(Replacing audio unit) Chapter 56
LCD screen has no display while 1. Audio unit itself Audio System-Audio Unit,
audio system works normally.
Replacement

Page 407