XV-EV51
93
5
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5
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8
C
D
F
A
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E
EVA emergency processing specification
1. About Emergency process
When abnormality of hardware of power supply short circuits and so on occurred, turn the power OFF
without an usual step in a moment. And perform process to limit the later power ON operation.
2. Category of error to perform the Emergency process
As for the error to perform the Emergency process, there are two kinds of the following.
• PROTECT error: Error by power supply of the amplifier section and abnormality of the fan
Overcurrent detection of amplifier
DC voltage detection of amplifier
Fan open and lock detection
Abnormal detection of 8V and 15V
• DVD error: Error by power-failure in the DVD module
3. Condition to enter Emergency process
• PROTECT error: When PROTECT port (pin 92) of the microcomputer was L more than 90 mS (less than
0.15VDD +0.4V).
• DVD error: When 3.3DET port (pin 17) of the microcomputer was more than 90mS, and were less than 2.5V
or more than 4.25V.
* Do not perform the error detection during 1.5 seconds after the power ON operation start at both ports.
4. State after the power OFF
STANDBY LED flashes in case of both of PROTECT and DVD errors
5. Possibility or no of re-power ON
• PROTECT error: Power ON is once again possible after the power OFF 60 seconds later.
Indicates "POW ERR" instead of "WELCOME" in this time.
* When pulled the AC power cord out after the power OFF within 60 seconds, cannot turn the power ON for 60
seconds after inserting the AC power cord once again.
* Flash of STANBY LED is continued even if it passes after the power OFF for 60 seconds.
• DVD error: Power ON is once again possible after the power OFF 60 seconds later.
Indicates "DVD ERR" instead of "WELCOME" in this time.
* When pulled the AC power cord out after the power OFF within 60 seconds, cannot turn the power ON for 60
seconds after inserting the AC power cord once again.
* Flash of STANBY LED is continued even if it passes after the power OFF for 60 seconds.
6. Recovery method of within 60 seconds after PROTECT error, and after DVD error
When turn the power ON once again after turning the power OFF within 60 seconds in the PROTECT error, and
after turned the power OFF in the DVD error, it is necessary to start with the test mode.
To enter the Test mode, turn the power on while short-circuiting with TEST jumper (W284) and VE+5 jumper
(W282) on the IF Assy.
Indicate with "U-TEST" in this time.
In addition, RAM of the microcomputer is reset to the factory shipping state when releasing the service test
mode with the power OFF. Then power ON can normally from the next time.
(When error is left, enter the Emergency process once again.)
1 Diagnosis method when the protection circuit turned to OFF at normal connection (MEDIA-AMP)
2 The release method that "power cannot turn on for 60 seconds"
When enter the individual operation
mode, a protection circuit does not work.
Enter the test mode by supplying AC power
(or DC power in the individual operation) while
short-circuiting the jumpers with "TEST" indication
on the IF ASSY, waiting for 60 seconds is released.
Be because the microcomputer was reset then.
Protection circuit
