Marantz SR7400 - System Error Codes and Troubleshooting

60
11. SYSTEM ERROR
When the microcomputer detects a trouble, the following
information is displayed on the FLD.
• After the error contents indication, Surround Mode is
initialized and returned Factory mode.
• The contents of the ERROR indication are the followings.
1. Trouble in DSP.
If communication with DSP is troubled more than 2 seconds
CHECK DSP
Indication is keep and sound is mute.
2. Trouble in DSP Code.
The trouble of DSP Code was found.
CHECK DSP ROM
3. Trouble in ADC.
When ADC input was chosen and CAL signal continued
High about 2 seconds after the ADC Calibration start.
CHECK ADC
4.Trouble in EEP-ROM
If data from EEPROM does not match.
CHECK E2P
5. Trouble in EEP-ROM IF
If communication with EEPROM is troubled more than 2
seconds.
CHECK E2P I F
6. Trouble in RS-232C.
If communication of Panja with RS232C is troubled more
than 2 seconds.
CHECK 2 3 2C
7. Trouble in 5V Supply
If 5V supply to DATA DIR is troubled.
CHECK POW5
8. Trouble in Protection
CPU turns off the speaker output
PROTECT
11. SYSTEM ERROR
CHECK DSP
CHECK DSP ROM
CHECK ADC
CHECK E2P
CHECK E2P I F
CHECK 2 3 2C
CHECK POW5
PROTECT