Sharp MD-MS701H Service Manual page 13

72h : EEPROM data read check sum error
73h : Record head drive disabled (by EJECT lever)
82h : Power overvoltage detection
91h : Ambient temperature is higher that the allowable temperature.
12. INNER Mode
• when the STOP button is pressed on the INNER menu (SQ______ ), the state is changed to the TEST mode STOP state.
• : Address
2
E -PROM (IC402) writing procedure
1. Procedure to replace E
(1) Replace E 2 -PROM.
(2) Deprive E 2 -PROM of protection (connect the pins 8 and 6 of IC402).
2
(3) Refer to the latest E -PROM data list.
(4) Press the Display/Lower-case Character button, Enter/Synchro button and Play/Pause button to start the test mode.
(5) Version display
[ V e r .
(6) The whole LCD lights.
(7) Test mode stop state
[ T E S T
(8) Press the "BASS" button, and press twice the "SKIP DOWN" button.
[ E E P R O M ]
(9) Perform the operation to display "E
display, and set according to the E
(10) Set the temperature reference. (Refer to the Temperature Reference Setting Method.)
(11) Set according to the E
(12) Press the Stop button.
[ T E S T
(13) Press the Stop button.
(14) After data is written in E
(15) Restore protection of E
2. Temperature reference setting method
[1] Measurement, calculation and setting procedure
(1) Set the TEST mode.
Set TEST 1, 0 = '01', and turn on power (or set PLAY ON in standby state).
•
(2) Start the EEPROM mode 'Temp' menu.
In the TEST mode STOP state, press the keys as follows: BASS, SKIP-DOWN x 2 times, PLAY, SKIP-DOWN x 4 times,
•
and PLAY in this order.
'TM$$%%' is displayed. ($$= Temperature code, %% = Temperature reference)
•
(3) Once press SKIP-UP, and determine the displayed microcomputer TEMP input AD value.
• 'TPin##' is displayed. (## = TEMP input AD value)
(4) At the ambient temperature, determine the temperature corrected value from the temperature measurement value
correction table.
(5) Determine the temperature reference, using the following formula.
• Temperature reference = Microcomputer TEMP input AD value + Temperature corrected value
• An example: Environmental temperature is 22°C and set voltage is 1.25V.
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2
-PROM and write initial value of microcomputer in E
]
E 2 -PROM version (C ~ Z)
Microcomputer ROM version
]
2 -PROM SETTING MODE CHART", compare the E
2 -PROM DATA LIST with the VOL UP or VOL DOWN key.
2
-PROM DATA LIST.
]
2
-PROM, turn off power .
2
-PROM (Disconnect connection made in Step (2) above).
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MD-MS701H/MS702H
2
-PROM
2 -PROM DATA LIST with the