NWZ-S636F, NWZ-S636FK, NWZ-S638F, NWZ-S639F, NWZ-S736F, NWZ-S738F, NWZ-S739F - Sony Audio Service Manual (repair manual). Page 10

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NWZ-S636F/S636FK/S638F/S639F/S736F/S738F/S739F
10
SECTION  4
TEST  MODE
1.  SETTING  THE  TEST  MODE
Note: Perform the test mode in the state of 3.6 V or more in the battery 
voltage.
Setting method:
1.  Turn the power on.
2.  Press the [BACK] key for 1.5 seconds or more, the home menu 
is displayed. 
3.  Slide the [HOLD] key to set the hold on.
4.  While pressing the [OPTION] key, press the key as following 
order.
    [
v
→ [
u
→ [
B
→ [
u
→ [
V
→ [
u
→ [
b
→ [
u
→ 
[
v
→ [
u
→ [
V
→ [
u
]
5.  The set reboots when the [HOLD] key is slided to set the hold 
off, and the color bar is displayed in the liquid crystal display.
6.  Enter the test mode when the [BACK] key is pressed in the 
state of step 5.
Note: The destination setting and sound pressure regulation setting cannot 
be executed by this test mode.
2.  RELEASING  THE  TEST  MODE
1.  Display the major item selection screen.
2.  Press the [
v
]/[
V
] key to select the “EXITTEST”, and press the 
[
B
] key to select the “SURE ?”.
3.  Press the [
u
] key, turn the power off and release the test 
mode.
3.  CONFIGURATION  OF  THE  TEST  MODE
<>
key
Major item
Major item switching: 
<><>
key
<#"$,>
 key
Minor item
Finish
or
Result
Start
Automatic
V
<>
 key
<>
 key
#
C
W 7
Minor item switching: 
<><>
key
W 7
4.  OPERATION  OF  THE  TEST  MODE
4-1. Power (POWER)
   
liquid crystal display
MPTAPP (X.XX.XX)
 POWER 
VCHK
 AUDIO 
ACHK
 VIDEO 
DSVCHK
 OTHER 
CHGCHK
 CLESTE 
BATTCHK
 DAC
 FM
 NC
 SHUTDOWN
 EXITTEST
 Note: Item of “NC” is displayed only by NWZ-S736F/S738F/S739F.
4-1-1.  Power supply voltage check (VCHK)
This mode is used in case power supply voltage in the state where 
all power supply lines are starting is checked.
Checking method:
1.  Enter the test mode.
2. Press 
the 
[
v
]/[
V
] key to select the “POWER”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] key to select the “VCHK”.
4.  Press the [
u
] key, all power supply lines are started.
   
liquid crystal display
POWER VCHK
START
    In this state, the power supply voltage of each power supply 
line can be confi rmed by measuring the voltage.
5.  Press the [BACK] key, return to minor item selection screen.
4-1-2. Consumption current (audio playback) check 
(ACHK)
This mode is used in case consumption current (audio playback) 
is checked in the state where “1 kHz 0 dBs L-ch/R-ch VOLUME: 
15” audio signal is outputted.
Checking method:
1.  Enter the test mode.
2. Press 
the 
[
v
]/[
V
] key to select the “POWER”, and press the 
[
B
] key to enter the minor item.
3.  Press the [
v
]/[
V
] key to select the “ACHK”.
4.  Press the [
u
] key, “1 kHz 0 dBs L-ch/R-ch VOLUE: 15” 
audio signal is outputted.
   
liquid crystal display
POWER ACHK
1kHz 0dBs L/Rch
HPOUT [ VOL: 15 ]
START
5.  In this state, each time the [OPTION] key is pressed, LCD 
back light on/off switch is performed.
6.  Press the [BACK] key, return to minor item selection screen.
Note: Information on the test mode must correspond in enough 
security. When the leakage has been revealed by any 
chance, the source of information is specifi ed.
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