ICD-PX312, ICD-PX312D, ICD-PX312F, ICD-PX312 M, ICD-PX312M (serv.man2) - Sony Audio Service Manual (repair manual). Page 11

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ICD-PX312/PX312D/PX312F/PX312M
11
10. ZLOAD test (Not used in this set)
•  A battery load check is forcedly executed.
 
LCD DISPLAY
ENTER
<ZLOAD>
Please Enter
<ZLOAD>
ZLOAD : ON
•  The OFF state is set at power-on.
 
[FF]:  Each time the key is pressed, ZLOAD_CTL switches 
between ON and OFF.
•  Press the [
x
] button to return to the test mode screen.
11. LOW DET test (Not used in this set)
•  The H/W low battery level detection signal LOWBATT_
XDET is checked.
 
LCD DISPLAY
ENTER
<LOW DET>
Please Enter
<LOW DET>
LOW DET : OFF
•  This set is normally off.
•  Press the [
x
] button to return to the test mode screen.
12. VBUS test
•  The VBUS signal is checked.
 
LCD DISPLAY
ENTER
<VBUS>
Please Enter
<VBUS>
OFF
OFF : VBUS_XDET=1(H)
ON   : VBUS_XDET=0(L)
•  At power-on, the acquired value of VBUS_XDET is indicated.  
(Constantly updated)
•  Press the [
x
] button to return to the test mode screen.
13. FM test
•  Operation of the FM tuner is checked.
 
LCD DISPLAY
ENTER
<FM TEST>
Please Enter
FM : OK DX
076.00  Lv : 00.50
•  At power-on, optionally the 00h (DeviceID) value of the FM 
IC register is obtained and compared.
 
OK: DeviceID, the acquired value is OK.
 
NG: DeviceID, the acquired value is NG.
•  If OK, a transition to the FM receiving mode is made and the 
receiver sensitivity is indicated.
 
Receiver sensitivity: Register 0 Ah bit [7:0] 
 
 
(Value of RSS [7:0] )
 
Initial value: 80.0 MHz/DX mode
 
[FF]: The receive step value is increased by 1.
 
[REW]: The receive step value is decreased by 1.
 
[PLAY]:  Each time the key is pressed, change of receive 
sensitivity. (DX t LOCAL t DX t......)
•  Press the [
x
] button to return to the test mode screen.
14. Key Count test
•  The count value is indicated for the key slide switch endurance 
test.
 
LCD DISPLAY
ENTER
<KEY COUNT>
Please Enter
<KEY COUNT>
00000
•  The count value is increased by 1 each time the following sig-
nal change is detected after power-on. The type of a key slide 
switch pressed is not discriminated.
•  All buttons (Also the production of the WakeUP signal is 
checked.)
•  Operate all the slide switches from ON to OFF and then OFF 
to ON.
•  Card insertion signal (Plus 1 only when the card is inserted.)
•  HP/MIC jack detection signal (Plus 1 only when the jack is 
inserted.)
 
Initial value: 00000
 
Upper limit value: 99999
•  If a key is pressed when the counter arrives at the upper limit 
of 99999, it is get back to 00000 and continues the count-up 
operation.
•  To exit this mode, disconnect power unplug the battery.
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