Kenwood KDC-MP928 Service Manual page 16

KDC-MP928/PSW9531
/PSW9531Y, XXV-01D
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Initializing AUDIO-related value setting
During STANDBY sourcing, by short-pressing [
DIO setting values are returned to the default values.
Flash ROM/Static RAM check
1. When entering the test mode, the manufacture code of the
Flash ROM (16M) is read and when it is normal, FROMCHK
terminal of the 100pin repeats Hi→Low→Hi · · ·. If the read-
ing is abnormal, "Low" is output.
If the manufacture code is normal, by short-pressing [
key, the connection checks on all terminal is started. If the
connections are normal, the FROMCHK terminal stops the
Hi→Low→Hi · · · repeating and outputs "Hi." If the reading
is abnormal, "Low" is output.
2. With all lights turned on and by long-pressing [AM] key, the
data on the Flash ROM (16M) is initialized. While erasing
the data, "Data_Erase. . . ." is displayed.
Note : Do not touch any key white this is in progress.
When erasing is complete, "Erase_OK!!" is displayed.
If "Erase_NG!!!!!!" is displayed, it was not possible to erase
the data on the Flash ROM (16M).
In this case, long-pressing [AM] key again. If it is the same,
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then there is an abnormality with the Flash ROM.
3. Regardless of the state of the test mode, when the power is
turned on, the manufacture code on the Static RAM is read
and, when, normal, Hi is output by the SRAMCHK terminal.
When abnormal, Low is output.
Other
• At Power ON "CODE_OFF", "CODE_ON" displays will not
be made.
• When sourcing STANDBY, by short-pressing [AUTO] / [TI]
key, GREEN/RED of the key illumination is switched.
• When staring up in the test mode, LINE MUTE prohibition
time is set to 1 second instead of 10 seconds.
• While in the test mode, security jig should not be used to
write the security code.
• While in the test mode, serial writing jig should not be used
to write the serial number.
• While in the test mode, even when a DC error is detected,
the detection information will not be written to the E2PROM.
• While in the test mode, even after an elapse of pre-set time,
the backup memory items will not be written to the E2PROM.
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• Information Clear mode for Test Mode, backup/installer
memory, and CD mechanism error log. In the DC error de-
tection information clear mode, DEMO mode operation will
.
not be conducted.
Also, in the above mode, the menu of the STANDBY source
will not display DEMO ON/OFF switching items.
16
TEST MODE
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• While in the test mode, and at the same time, PM_DET
terminal is H, the following will apply to the [EJECT] key,
regardless of whether a disc is in the unit or not.
Panel full OPEN/CLOSE is conducted with a short-push.
(Protection time: 3 seconds)
As far as this item is concerned, eject will be achieved by 1
second long-push on the [EJECT] key.
Clearing backup memory and installer memory
data (Clearing E2PROM data)
]
1. By pressing [NEXT] key and [ATT] key simultaneously, re-
set and start the unit. This will start the initialization pro-
cesses for backup and installer memory data and the error
log information of the CD mechanism.
2. When initialization is complete, the following display will be
made.
Normal completion
CD_E2P___ :
AUDIO_E2P :
Abnormal ending 1
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3 6 7 1 3 1 5
backup/installer memory initialization: NG
CD_E2P___ :
AUDIO_E2P :
Abnormal ending 2
CD mechanism error log initialization: NG
CD_E2P___ :
AUDIO_E2P :
Abnormal ending 3
All initialization: NG
CD_E2P___ :
AUDIO_E2P :
3. While in this mode, even after an elapse of a pre-set time,
no backup memory items will be written to the E2PROM.
4. This mode is released by resetting. (What was on the last
screen will not be retained.)
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