Cd Eject Error Detection; Installer Memory Specifications - Kenwood KDC-W8534 Service Manual

KDC-W8534/W8534Y
KDC-X790
Overview
Record the number of times when mechanism error (SW er-
ror) occurred at CD EJECT.
EJECT error recording shall be done in 4 patterns, by the SW
status illustrated below (3 patterns in models other than TYPE-
J).
EJECT error is established when EJECT operation is not com-
pleted after EJECT operation is started before the protect timer
count is completed (False EJECT, or ejection with no CD, is
considered as exception and is not recorded).
(False EJECT is determined when: while chucking is not done,
and when SW status is determined as NO DISC.)
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) is input.
3) When in EEPROM all-clear initialization mode (refer to
the test mode specification document).
• Indication is shown on the test mode specification docu-
ment.
• Number of times with error(s) is 99 times at MAX.
• Not recorded in test mode [1+3 keys].
• When EJECT was error, re-try 3 times, and count each er-
ror while re-try as 1 error.
At specialists (or specialty stores), when the installer sends
the vehicle back to the user, they may make the store-recom-
mended audio configuration.
When the user changes the setting values, when the backup
power supply was taken out at times of battery change or when
the reset button was pressed, to make it possible to recall the
setting values, the store-recommended configuration values
can be saved into E2PROM.
The specification detail defer in "with-DSP model" and in "with-
out-DSP model".
[Models with DSP] KDC-W8534/W8534Y
• Calling and saving the configuration is done by the multi-
function key.
22

CD EJECT ERROR DETECTION

INSTALLER MEMORY SPECIFICATIONS

Operation
EJECT
q
SW1
(LOS SW)
SW3
(12EJE SW)
SW4
(LOE/LIM SW)
ERR condition
EJECT_ERR1
∗ Trigger for starting the sequence: detecting DISC ejection
by EJECT key. (As an exception, protect EJECT when LOAD
error)
q If the protect timer was counted up before the LOS (SW1)
down edge detection, it is recorded as EJECT_ERR1.
w If the protect timer was counted up after LOS (SW1) down
edge before the 8EJE (SW2) down edge detection, it is re-
corded as EJECT_ERR2. [12EJE down edge detection in
models other than TYPE-J]
e If the protect timer was counted up after LOS (SW1) down
edge before the 12EJE (SW3) down edge detection, it is
recorded as EJECT_ERR3. (TYPE-J only)
r If the protect timer was counted up after LOS (SW1)/8EJE
(SW2)/12EJE (SW3) down edge before the down edge
detection of any of these, it is recorded as EJECT_ERR4.
∗ When EJECT is started, if not chucking, it is not counted as
EJECT error (considered as false EJECT). However, EJECT
when SW change is detected.
• Items to be saved are Cabin, Speaker, EQ, X' over, D.T.A.,
and Sub Woofer Level (Refer to the separate document for
more detail).
Only one setting can be saved for each item.
(EQ setting can be changed for each source, but only one
setting can be saved as the installer memory specification,
and the source in which the saving operation was carried
out is saved as such.)
• The contents read out by the call key shall be reflected only
to the current source at the time. → EQ curve is "IN-
STALLER".
(EQ setting can be changed for each source, but not re-
flected to EQ settings of sources other than where the call-
ing operation was carried out.)
r
w
EJECT_ERR2
EJECT_ERR4