Pioneer XW-NAC3-K Service Manual page 31

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6. DSP Error Display
How to Enter DSP Error Display Mode
To enter DSP Error Display mode, press the STEREO key on the service remote control unit (GGF1381) during
Service Test mode.
To return to Normal Service Test mode, press the STEREO key on the service remote control unit again.
An error name is displayed in a maximum of 6 characters.
D S P E
H R E Q
D S P O
SUPPLEMENT:
Communication check method with the main ICs (System Ucom, Sub Ucom, DSP, ROM, etc.)
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Communication with each LSI can be confirmed in the following manner:
Communication between the System Ucom (IC1000) and NETWORK Assy
Communication will be OK if the Home menu is displayed when the HOME MEDIA GALLERY function is selected.
Communication between the System Ucom (IC1000) and SUB Ucom (IC3000)
Communication will be OK if the version of the SUB Ucom (IC3000) is displayed.
Communication between the System Ucom (IC1000) and DSP
Communication will be OK if no DSP error is displayed in Service Test mode.
Communication between the System Ucom (IC1000) and modulator (TAS5707)
Communication will be OK if sound is output and the volume can be increased or decreased.
Communication between the System Ucom (IC1000) and EEPROM
Communication will be OK if "STANDBY/ON" LED does not flash while power is on.
Communication between the System Ucom (IC1000) and Bluetooth adapter
Communication will be OK if pairing can be performed using the PLAY/PAUSE key on the remote control unit after
INPUT SELCTOR is switched to BT AUDIO.
Communication between the System Ucom (IC1000) and LCD
Communication will be OK if characters are displayed on the LCD.
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No data can be received from the DSP.
→ Communication error between the source and the DSP
→ The DSP is assumed to be defective.
No HREQ return value
→ The DSP is assumed to be defective.
No DSP error
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