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4. Trouble Shooting
4.9.2 Speaker (Voice Loud Speaker, Midi, MP3, Key Tone)
• Signals to the speaker
– Speaker signals are generated at AB3000
• SPKRP, SPKRN
– Speaker path :
• 1. AB3000 (SPKRP, SPKRN)
• 2. C466, C467 on the main board
• 3. U405(audio amp) on the main board
• 4. VA501, VA502 on the main board
• 5. CN100 on the Key FPCB
• 6. Speaker
Note : It is recommanded that engineer should check the soldering of R, L, C
along the corresponding path before every step.
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