21
KDC-W8534/W8534Y
KDC-X790
DC OFFSET ERROR
Display Example
PROTECT
Blink alternately
at 1Hz
(
(
CD LOAD ERROR DETECTION
●
Overview
Record the number of times when mechanism error (SW er-
ror) occurred at CD LOAD.
LOAD error recording shall be done in 2 patterns, by the SW
status illustrated below.
LOAD error is established when LOAD operation is not com-
pleted after LOAD operation is started before the protect timer
count is completed.
Clearing of record is done in the following situations:
1) After reset is cancelled, when reading EEPROM, the code
is NG.
2) While in test mode, the specified key (Play/Pause key
pressed for 2 seconds) input.
3) When in EEPROM all-clear initialization mode (refer to
the test mode specification document)
• Display is shown on the test mode specification document.
• Number of times with error(s) is 99 at MAX.
• Not recorded in test mode [1+3 keys].
●
Operation
∗
Trigger for starting the sequence: detecting the inserted disc
with SW 1 and 3 LOW edge.
(As an exception, protect LOAD when EJECT error)
q
If the protect timer was counted up before the LOS (SW1)
up edge detection, it is recorded as LOAD_ERR1.
w
If the protect timer was counted up after the LOS (SW1) up
edge detection, before the LOE/LIM (SW4) up edge detec-
tion, it is recorded as LOAD_ERR2
∗
When DISC was inserted briefly but pulled out immediately
(DISC is detected but not inserted), it is considered as an
error.
Special case: Even if LOS (SW1) up edge is not detected, if
LOE/LIM (SW4) up edge is detected, it is still recorded as
LOAD_ERR1. Also, if SW4 up edge is detected, the motor is
stopped.
∗
The purpose is to shut down audio output. Basically, the
logic sets the audio output system signal line when in
Standby source.
3. Key specification
• No specific limitation (Normal operation).
4. Display specification
• Display the “PROTECT” string and blink all characters at
1Hz.
∗
Use the indication below with the highest priority (error mes-
sage), and maintain the error message even when the
source is changed.
●
Cancel Condition
• Press the Reset terminal on the main body. or set Backup
to OFF (Unplug and plug back in the DC connector).
The history is maintained (E2PROM data is saved).
●
Note while in test mode
• While in test mode, even if DC leak is detected, it is not
written into E2PROM.
When an error is detected, the display is enabled.
●
Other
• Function for checking and clearing data in E2PROM by a
given key shall be included.
(Used at production dpt. and service center, etc.)
SW1
(LOS SW)
SW3
(12EJE SW)
SW4
(LOE/LIM SW)
LOAD_ERR1
LOAD_ERR2
LOAD
q
w
ERR condition
Effect