Sony PCM-D50 Service Manual page 17

9 DCIN
Function: To display the current value of DCIN A/D and
whether it can be detected by the 5T735 detection
register.
<DCIN>
A/D : 84h
DETECT : OK
[STOP/MENU] : RET
0 VBUS
Function: VBUS detection check.
VBUS is checked by both the 5T735 register and the M66592
register and OK is displayed when it could be detected.
<VBUS>
DETECT (5T735) : OK
DETECT (M66592) : OK
[STOP/MENU] : RET
qa Sleep
Function: Sleep test
It is tested that the Sleep Mode can be entered.
qs App LogOut
Function: For design. Output of the application's operation
log
qd Log Output
Function: For design. Log output.
qf Log Clear
Function: For design. Log clear.
qg Menu Init
Function: To return the Menu settings to the factory settings.
LCD Contrast Adjustment
When the system board or LCD1 has been replaced, the LCD con-
trast should be adjusted.
1. Enter the TEST MODE and select Lcd Contrast.
2. Connect a digital voltmeter between the test points VLCD and
DGND of the DA board.
3. Use [FF] key and [FR] key to adjust the contrast until the read-
ing on the voltmeter is 14.45±0.05V.
4. When the voltage falls within the specifi ed range, press
[PLAY] key and make sure that the display is returned to the
Menu List.
5. Exit the TEST MODE.
– DA BOARD (Side A) –
VLCD DGND
S4202
224
VLCD DGND
MIC (L-CH)
DIRECTION
R4207
6 4
R4222
3 1
Q4221
Q4222
1 3
4 6
R4223
JL4005
R4037
R4226
2
D4253
3
R4225
B L OVER
4
IC4007
JL4252
3 2
PH4001
4 1
R402
R4008
PCM-D50
C4202
1 13
CN4201
2 12
C4203
1
6
R4031
3 4
R4089
Q4032
1
R4036
5
R4092
JL4202
JL4201
JL4001
R4024
R4052
R4048
JL4206
R4062
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