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After finished internal Check, TONELAB Le automatically goes to Operation Check.
Internal Check 4. CODEC MUTE
This item inspectｓ the wiring of the CODEC and DSP (FXD03). Same setting as LEVEL Check (3.1),
check input level and confirm that mute is working (there is not input bigger than noise level).
Internal Check 5. LEVEL
Output 1khz sine wave from the DSP2 and inspect the returned signal level to the input.
The test cable 1 and 2 (described at the end of this document) are needed for connection.
PHONE->INPUT, SEND->RETURN
The routing, output level, input level (OK range) are followings.
1. L->R , RETURN SW Off
SO[1]L (0.250(=1/4)) ---> DSP SI[1]R (0.150858 +-20%)
IN ------------------->| Ain R | | AoutR |- - - -> PHONE R
+-|----| DoutR | | Din R |<-+ |
| |
| |
| |
| |
| +-->| SI[1]L SO[1]L |-----|-+
+---->| SI[1]R SO[1]R |-----+
2. L->L , RETURN SW On
SO[1]L (0.063(=1/16)) ---> DSP SI[1]L (0.607623 +-20%)
INSERT(*0.56)
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|
|
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IN ---+(-->)+-- *16 -->| Ain L | | AoutL |-------> PHONE L
↑
RETURN OPEN
+-|----| DoutR | | Din R |<-+ |
| |
| |
| |
| |
| +-->| SI[1]L SO[1]L |-----|-+
+---->| SI[1]R SO[1]R |-----+
A/D
D/A
AK5381VTPA AK4384VTP
+-------+ +-------+
| Ain L | | AoutL |-------> PHONE L
|
| |
|
+----| DoutL | | Din L |<---+
+-------+ +-------+ | |
DSP(FXD03)
+---------------+
+---------------+
A/D
D/A
AK5381VTPA AK4384VTP
+-------+ +-------+
| Ain R | | AoutR |- - - -> PHONE R
|
| |
|
+----| DoutL | | Din L |<---+
+-------+ +-------+ | |
DSP(FXD03)
+---------------+
+---------------+
| |
| |
| |
| |
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| |
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