Sharp MD-X7H Service Manual page 33

2. Test mode
Test mode setting method
1. Holding down the ENTER button and MD
(State A is changed to state B .)
2. Insert the playback disc 1 (high reflection disc) or recording disc 2 (low reflection disc). (State C is set.)
Thus, the test mode state is set.
A tsm e
TEST STOP state
B EJECT
TEST
C AUT YOBI
TEST
Entering the specific mode
Whenever the CD (PLAY/PAUSE) button is pressed, the mode is changed.
AUTO pre-adjustment
EEPROM setting
• Canceling the test mode
When the ENTER button is pressed and held, and then the POWER button is pressed, the TEST mode will be canceled and the
power will be turned off.
(If the ENTER button is pressed, the unit will enter the MD stand-by mode.)
EEPROM (IC1402) writing procedure
1. Procedure to replace EEPROM and to write the initial
value of microcomputer in EEPROM
(See the MD-X8/MD-X8H/MD-X8W service manual, page
28.)
(1) Replace EEPROM.
(2) Refer to the latest EEPROM data list.
(3) Hold down the ENTER button and MD PLAY button, and press
the POWER button to enter the test mode.
When an MD is loaded, "AUT YOBI" will appear.
Press the MD STOP button. When the MD STOP button is pressed,
the version described in step (4) below will be displayed.
(4) Indication of version.
[ t s m e
(5) Press the CD PLAY button 7 times.
[ E E P R O M S E T ]
(6) Perform the operation shown in the "EEPROM setting mode
chart", compare the indication with the EEPROM data list, and
make a setting according to the EEPROM data list, using
MULTI UP button or MULTI DOWN button.
(7) Set the temperature reference value.
(Refer to "Temperature reference setting procedure".)
(8) The setting must conform to the EEPROM data list.
(9) Press the ENTER button to write the data into the EEPROM.
MD-X5/X5H/X5W/X7/X7H/X8/X8H/X8W/XV300H/XV300X
(PLAY/PAUSE) button, press the POWER button.
: TEST MODE
(When the MD
is restored. To restore C again, press the CD
button.)
AUTO adjustment
MANUAL adjustment
]
EEPROM version (c to z)
Microcomputer ROM version
Model code
represents version of MD microcomputer.
(STOP) button is ressed in the C state, the indication A
RESULT Pre-adjustment
MANUAL pre-adjustment (MD-X8W Only)
2. Temperature reference value setting procedure
(to be executed at room temperature within 21 to 29
(1) Test mode stop state.
[ t s m
(2) Crrect temperature depending on ambient temperature according
to the following table.
Ambient temperature
+ 12.2 °C ~ + 15.8 °C
+ 15.9 °C ~ + 19.6 °C
+ 19.7 °C ~ + 23.2 °C
+ 23.2 °C ~ + 26.8 °C
+ 26.9 °C ~ + 30.7 °C
+ 30.8 °C ~ + 34.3 °C
+ 34.4 °C ~ + 37.9 °C
An example: When ambient temperature is 22°C and meadured
3) Press the CD PLAY button 7 times.
[ E E P R O M S E T ]
(4) Press the MD PLAY button 1 times.
[ F o c u s
(5) Press the CD PLAY button 4 times.
[ T e m p
(6) Press once the MD PLAY button.
[ T E M P
: Measured temperature,
(7) Set temperature to the value determined above, using the
MULTI UP or MULTI DOWN button.
(8) Press the MD STOP button.
[ T e m p
– 3 –
: Places to add/change/correct
(PLAY/ PAUSE)
RESULT MANUAL pre-adjustment
e ]
temperature is 73H
Temperature setting = 73 H - 01 H
= 72 H
* When the measured temperature fluctuates between
two values, take lower one (if temperature fluctuates
between 73H and 72H, take 72H).
]
]
]
: Temperature setting
]
°
C)
correction
-0 3
H
-0 2
H
-0 1
H
± 0
H
+0 1
H
+0 2
H
+0 3
H