ICD-UX522, ICD-UX522F, ICD-UX523, ICD-UX523F - Sony Audio Service Manual (repair manual). Page 14

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ICD-UX522/UX522F/UX523/UX523F
14
4-8. RTC TEST
The self-test of RTC module can be done.
Procedure:
1.  Enter the test mode.
2.  Press the [
>
] or [
.
] keys to select the “RTC TEST”, and 
press the [
N
/ENTER] key.
3.  The self-test of RTC module is executed, and result is dis-
played.
<RTC TEST>
OK
LCD Display
*Displayed characters/values are example.
RTC self-test result
Releasing method:
Press the [STOP/
x
] key, return to test mode menu.
4-9. BATT A/D
A/D value (voltage value and temperature value) acquisition can 
be performed.
Procedure:
1.  Enter the test mode.
2.  Press the [
>
] or [
.
] keys to select the “BATT A/D”, and 
press the [
N
/ENTER] key.
3.  A/D value (voltage value and temperature value) are acquired, 
and they are displayed.
 
(8 bit (The bit shift after LSB side 2 bit omission))
 
Displayed values are always updated.
<BATT A/D>
AC: 7B  2AC: 00
BC: 7B  4BC: 00
TEMP: 6F
LCD Display
*Displayed characters/values are example.
Releasing method:
Press the [STOP/
x
] key, return to test mode menu.
4-10. ZLOAD
Compulsive operation of a battery load check can be performed.
Procedure:
1.  Enter the test mode.
2. Press the [
>
] or [
.
] keys to select the “ZLOAD”, and 
press the [
N
/ENTER] key.
3.  ON/OFF of ZLOAD is changed. 
<ZLOAD>
ZLOAD : OFF
LCD Display
*Displayed characters/values are example.
 
Key input settings under this mode of operation:
 
[
>
] or [
.
]  : ZLOAD change (ON ↔ OFF)
 
[
N
/ENTER] 
: ZLOAD_CTL change (H ↔ L)
Releasing method:
Press the [STOP/
x
] key, return to test mode menu.
4-11. LOW 
DET
LOWBATT_XDET (Battery voltage decrease detection signal) 
can be checked.
Procedure:
1.  Enter the test mode.
2. Press 
the 
[
>
] or [
.
] keys to select the “LOW DET”, and 
press the [
N
/ENTER] key.
3.  The state of LOW DET is displayed.
<LOW DET>
LOW DET: OFF
LCD Display
*Displayed characters/values are example.
 
OFF : LOWBATT_XDET=1 (H)
 
ON  : LOWBATT_XDET=0 (L)
Releasing method:
Press the [STOP/
x
] key, return to test mode menu.
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