Marantz SA8004/K1SG Service Manual page 30

If an error occurs to communication commands while the unit is performing normal operations including PLAY,
PAUSE and SEARCH, the display will show the following message. This message is mainly for debugging software
and normally does not appear.
After this message is displayed, the unit automatically resets the USB module.
If the error persists after the unit is restarted, U501 may be broken as it will not accept a specifi c command alone.
If no other error message appears, replace U501.
A- B 1 RPT
Display
Off
U S B
If an error occurs to the command communication to indicate a change in the sampling frequency, the display will
show the following message.
This message is mainly for debugging software and normally does not appear.
A- B 1 RPT
Display
Off
L 0 A C
Upon confi rming that an iPod device is connected, the unit will begin modifying the USB communication method. If
an error occurs in this process, the display will show the following message.
If this message reappears after unplugging and plugging the iPod device, U501 may be broken as it will not accept a
specifi c command alone.
If no other error message appears, replace U501.
A- B 1 RPT
Display
Off
S e t u
RNDM PROG TRK SA-CD CD
C T i
RNDM PROG TRK SA-CD CD
0 1
RNDM PROG TRK SA-CD CD
p 1
M FILE USB STRG D OFF
m e r O u t
M FILE STRG D OFF
USB
E r r : X X
M FILE USB STRG D OFF
E r r o r
30
REMAIN TTL
REMAIN TTL
REMAIN TTL
X