XC-Z9
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3. Operations
Operations are basically the same as in Normal Mode. However whenever functions are changed, the display indicates
that the unit is in Service Test Mode, as shown below.
SERVICE TEST MODE scrolls across the top of the display when functions are changed.
After scrolling, SERVICE TEST MODE continues to be displayed only for LINE, PHONO, and FRONT AUDIO.
For all other functions, SERVICE TEST MODE is not displayed after it scrolls off the display.
4. Description of Errors
According to the type of malfunction, the following error indications are displayed when the unit is turned on:
Protect Circuit is activated.
1. An abnormal level of electricity indicates a short-circuit at V+10, V+5, or V+3R3 or that the normal value(s)
at one or more of these points has/have been exceeded.
2. The XPROTECT line up to the system control computer is short-circuited to ground or broken.
SACD/CD malfunction
1. An irregular current indicates a short-circuit at V+6R8, V+5V, or V+3 or that the normal value(s) at one or more of
these points has/have been exceeded.
2. The VDET line up to the system control computer is short-circuited to grount or broken.
1. It is possible that there is a short-circuit or a break in the communication line to the EEPROM.
2. There may be a problem with the IC for the EEPROM.
If an error message is displayed again, it may indicate one of the following problems:
1. The Digital AMP IC in the AMP Assy is malfunctioning.
2. There is a short-circuit between the Digital AMP IC and the speaker terminals.
If "Over Temperature" is not displayed the next time you turn the power on in Normal Mode, the problem has
been resolved.
(Turn down the volume when listening because high volumes may temporarily cause an increase in temperature.)
If "Over Temperature" is displayed again, it may indicate one of the following problems:
1. The Digital AMP IC in the AMP Assy is malfunctioning.
2. The OTW line from the above-mentioned Digital AMP IC up to the system control computer is short-circuited
to grount or broken.
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