MARANTZ SR4300
Manual de Servicio

System Error

When the micro-computer detects a trouble, the following information is displayed on the FLD.

1. Trouble in DSP If communication with DSP1(Q610) is troubled more than 2 seconds, FLD shows below.

E

R

R

O

R

D

S

P

R

O

M

* This display stays and sound is muted.

2. Trouble in EEPROM If data from EEPROM (ICS21) does not match, FLD shows below.

C

L

E

A

R

M

E

M

O

R

Y

* After displaying it, Back-up Data is reset to default.

3. Trouble in EEPROM I/F If communication with EEPROM(ICS21) is troubled more than 2 seconds, FLD shows below.

E

R

R

O

R

E

E

P

I

F

4. Trouble in 5V Supply If 5V supply to DIGITAL/AUDIO PCB is troubled, FLD shows below.

E

R

R

O

R

P

O

W

5

V

5. Trouble in 5V Supply If 5V supply to P604(DSP/CPU PCB) is troubled, FLD shows below.

P

R

O

T

E

C

T

* If a trouble is detected upon turning on the power, CPU turns off the speaker relay. And if the trouble is not recovered within 2 seconds, CPU turns the unit into stand-by. If DC offset or over current is detected while the power is on, CPU turns off the speaker relay. If overheat or some trouble is detected on the main transformer, CPU turns the unit into stand-by immediately.

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