ICD-PX312, ICD-PX312D, ICD-PX312F, ICD-PX312 M, ICD-PX312M (serv.man2) - Sony Audio Service Manual (repair manual). Page 10

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ICD-PX312/PX312D/PX312F/PX312M
10
7.  LCD Pattern test
•  LCD and LED on/off checks and LCD contrast adjustment are 
performed.
LCD DISPLAY
ENTER
<LCD PATTERN>
Please Enter
+
+
+
+
88
188
188
,
DXLOCAL
 SCAN HL
.  >
REC
NEW
c
VOR
EASY-S
LCF
m
SHQSPLP
FULL
e
u
/
B
B
b
b
The LED is 
illuminated orange.
The LED is 
illuminated red.
The LED is 
illuminated red.
The LED is 
illuminated red.
The LED is 
illuminated green.
,
EASY-S
LCF
m
SHQSPLP
FULL
e
u
b
88
188
188
DXLOCAL
 SCAN HL
.  >
REC
NEW
c
VOR
B
B
b
+
•  Press the [
x
] button to return the test mode screen.
8.  RTC test
•  Perform the self test of the RTC module.
 
LCD DISPLAY
ENTER
<RTC TEST>
Please Enter
<RTC TEST>
Please wait.....
0.9~1.1 sec
<RTC TEST>
OK
•  At power-on, optionally an R/W test on the clock register is set 
and either an interrupt updated by the second or a 1-sec fi xed-
cycle interrupt to the RTC module is set. And it is verifi ed that 
the interrupt signal is produced.
•  If an interrupt occurs in between 0.9 and 1.1 second after the 
interrupt is enabled to the timer on the main side, it is deter-
mined to be OK.
•  If no interrupt occurs after the elapse of 2 seconds, a timeout is 
set and it is determined to be NG.
•  Press the [
x
] button to return to the test mode screen.
9.  BATT A/D
•  The A/D values related to voltage and temperature are ob-
tained.
 
+
LCD DISPLAY
ENTER
<BATT A/D>
Please Enter
AC : 66
BC : 65
2AC : 00
4BC : 00
TEMP : 71
AC     :Voltage of 2 sell
BC     :Voltage of 1 sell for battery
2AC   :Charge X2 amplifier output value
2BC   :Charge X4 amplifier output value
TEMP :Temperature
•  At power-on the relevant A/D value is obtained and indicated.
 
The indicated value is in 8-bit format (2 bits are cut off on the 
LSB side and then the bits are shifted.)
•  The indicated value is continually updated.
•  Press the [
x
] button to return to the test mode screen.
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