Read Sony ICD-P28 Service Manual online
9
ICD-P28
3. Sleep test
• Pressing the x•B key causes the set to enter the sleep state.
• Press any keys to exit the sleep state.
• Pressing the x•B key causes the set to enter the sleep state.
• Press any keys to exit the sleep state.
4. Beep test
• Beep sound of 1.3 kHz or 2 kHz is output.
• Beep sound of 1.3 kHz or 2 kHz is output.
5. RTC test
• Perform the connection test of the RTC, EEPROM.
• Perform the connection test of the RTC, EEPROM.
(1) RTC EEPROM test
This test checks that any data is written and read to and from
specific registers (verify check) and that data is cleared.
specific registers (verify check) and that data is cleared.
(2) RTC clock function test
This test checks that the time is updated at intervals of 1 second
in the micro processor by the RTC.
• It determines whether a test result is OK or NG.
in the micro processor by the RTC.
• It determines whether a test result is OK or NG.
If NG, it indicates that either device of RTC or EEPROM was
found to be NG.
(All OKs: RTC OK/RTC NG: RTC BAD/EEPROM NG: EEP
BAD)
found to be NG.
(All OKs: RTC OK/RTC NG: RTC BAD/EEPROM NG: EEP
BAD)
6. Key entry test
• When the any key is pressed, the entry key and the A/D
• When the any key is pressed, the entry key and the A/D
converted value (hexadecimal) of the two channel keys are
displayed.
KEY IN0 is displayed on the upper side and KEY IN1 on the
lower side.
displayed.
KEY IN0 is displayed on the upper side and KEY IN1 on the
lower side.
• When the STOP key is pressed, the A/D value of the key is
displayed while the key is depressed. When the key is released,
the screen returns to the test menu.
the screen returns to the test menu.
7. Battery remaining power test
• The detected A/D value (hexadecimal) of the battery remaining
• The detected A/D value (hexadecimal) of the battery remaining
power is displayed.
8. LED test
• LED ( OPR : orange) are all turned on.
• LED ( OPR : orange) are all turned on.
SLEEP
SOON
x
• B
HOLD
SLEEP
with
off
off
any keys
BEEP
1.3k
(SET)
.
/ >
x
• B
x
• B
(SELECT)
STOP
2.0k
•
•
•
•
•
•
1.3k
1.3k
2.0k
STOP
STOP
ON
ON
RTC
RTC
ON
x
• B
STOP
KEY
KEY,OFF
OFF
x
• B
STOP
BATT
BATT
AA
x
• B
STOP
u
LED
LED
ON
x
• B
STOP
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