Marantz SR7500/A1B - System Error Detection and Display; System Error Codes and Causes

11
5. SYSTEM ERROR
When the microcomputer detects a trouble, the following in-
formation 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.
2. Trouble in DSP Code
The trouble of DSP Code was found.
3. Trouble in EEP-ROM
If data from EEPROM does not match.
4. Trouble in EEP-ROM IF
If communication with EEPROM is troubled more than 2
seconds.
5. Trouble in RS-232C
If communication of Panja with RS232C is troubled more
than 2 seconds.
6. Trouble in 5V Supply
If 5V supply to DATA DIR is troubled.
7. Trouble in Protection
CPU turns off the speaker output.
Indication is keep and sound is mute.
CHECK DSP ROM
CHECK E2P I F
CHECK E2P
CHECK 232C
CHECK POW5
PROTECT
CHECK DSP ROM
 ᘙᅆཞƸƦƷLJLJư᪦٣Ƹ /WVG ཞ
5. SYSTEM ERROR
ᙌԼϋᢿưƷီࠝႆဃ଺ƴϼྸŴᘙᅆǛᘍƍLJƢŵɼƴӲ
Device
ƱƷᡫီࠝǛ౨ЈƠLJƢŵ
᳽
ERROR
ᘙᅆࢸŴ
Surround

Mode
ƸИ஖҄ƞǕ߻ئЈᒵ
Ʒཞƴ৏ǓLJƢŵ
᳽
ERROR
ᘙᅆƷϋܾƸɦᚡưƢŵ
1. DSP
ီࠝ౨Јᘙᅆŵ
ီࠝ౨Јᘙᅆŵ

DSP
ƱƷᡫɥƷɧφӳǛኖ  ᅺ౨ЈƠƨ଺ŵ
2. DSP Code
ီࠝ౨Јᘙᅆŵ
ီࠝ౨Јᘙᅆŵ

DSP

Code
ƷီࠝǛ౨ЈƠƨ଺ŵ
3. EEP-ROM
ီࠝ౨Јᘙᅆŵ
ီࠝ౨Јᘙᅆŵ

EEP

ROM

Data
ƷɧૢӳǛ౨ЈƠƨ଺ŵ
4. EEP-ROM IF
ီࠝ౨Јᘙᅆŵ
ီࠝ౨Јᘙᅆŵ

EEP

ROM
ƱƷᡫɧφӳƕኖ  ᅺˌɥဃơƨ଺ŵ

5. RS-232C
ီࠝ౨Јᘙᅆŵ
ီࠝ౨Јᘙᅆŵ

Panja
ᡫ଺ƴ
RS

C
ƱƷᡫɧφӳǛኖ  ᅺˌ
ɥ౨ЈƠƨ଺ŵ
6. 5V
ီࠝ౨Јᘙᅆŵ
ီࠝ౨Јᘙᅆŵ

DATA

DIR
 ƷီࠝǛ౨ЈƠƨ଺ŵ
7. Protection
ӭီࠝ౨Јᘙᅆŵ
ӭီࠝ౨Јᘙᅆŵ

Speaker
ƔǒǛЈщǛഥNJLJƢŵ
CHECK DSP ROM
CHECK E2P I F
CHECK E2P
CHECK 232C
CHECK POW5
PROTECT
CHECK DSP ROM