Marantz SA8004/K1SG Service Manual page 23

[B] The mode to check the last error message etc.
This test mode is common to all models.
1. The error message displayed as the Last Error Message
(1) Communication error between SA-CD Module and Microprocessor
When having had the communication error with the SA-CD Module more than a regulated number of times, the unit
will reset the SA-CD Module after displaying the following message. This will continue to be displayed until the unit
has recovered from the communication error.
When the unit is ready to play back CDs and SA-CDs, the SA-CD Module and the Microprocessor communicate
regularly. Check the signal in reference to the communication between the SA-CD Module and the Microprocessor
on Communication Waveforms page.
The MOD_SCL is the clock that is transmitted from the SA-CD regularly. If this signal cannot be detected, the SA-CD
Module may be broken. If so, replace the SA-CD Module.
When the SA-CD Module has been replaced, ensure that the Playtime will be cleared.
A- B 1
Display
Off
(2) Communication Error between D/A Converter and Front Microprocessor
If no response is detected in the communication between the D/A Converter and the Microprocessor, the display will
show the following message. Make the CD/SA-CD or the USB replayable.
Ensure that IIC communications have been established between R217 and R218 when the unit is switched from
STOP to PLAY.
If the error cannot be corrected through normal operations, U204 may be broken. If such is the case, replace U204.
A- B 1
Display
Off
2. Error messages that are not displayed in the Last Error Message
(1) Error messages that can be displayed on the FL
(Communication Error between the Front Microprocessor and EEPROM)
If no response is detected between the Front Microprocessor and EEPROM within a regulated timeframe, the display
will show the following message.
Ensure that IIC communications have been established between R123 and R125 when the unit is powered on or put
into STANDBY.
IF the error cannot be corrected through normal operations, U101 may be broke. If such is the case, replace U101.
A- B 1
Display
Off
When no disc information is displayed 120 seconds after the disc is loaded, the display will show the following
message. Reset the SA-CD Module.
If no information can be obtained after this operation has been repeated three times, the unit will open the tray by
itself. The unit cannot play back the disc if this message appears.
A- B 1
Display
Off
RPT RNDM PROG TRK SA-CD
S A C D _
RPT RNDM PROG TRK SA-CD
D A C E r
RPT RNDM PROG TRK SA-CD
E R O M E
RPT RNDM PROG TRK SA-CD
_ C a n '
CD M FILE USB STRG D OFF
C o m _ E r r
CD M FILE STRG D OFF
USB
r o r I I C
CD M FILE USB STRG D OFF
r r o r I I C
CD M FILE USB STRG D OFF
t _ P l a y
23
REMAIN TTL
REMAIN TTL
_
REMAIN TTL
REMAIN TTL
_