Sony MZ-E909 Service Manual page 13

5-4-3. Vl PWM Duty adjustment method
1. Set the Manual mode and set the item No. to 764.
LCD display
764 VlPWM XX
2. Connect a digital voltmeter to TP917 (VL) on the main board
and adjust + key (Voltage up) and – key (Voltage down) on
the remote control.
Adjustment value:2.23V
Standard value:2.22 to 2.235V
digital
MAIN BOARD (SIDE A)
voltmeter
TP917
(VL)
L902
D901
3. Press X key to write the adjustment value.
5-4-4. Vd PWM Duty adjustment method
1. Set the Manual mode and set the item No. to 765.
LCD display
765 VD_PWM XX
2. Connect a digital voltmeter to TP903(VD) on the main board
and adjust + key (Voltage down) and – key (Voltage up) on
the remote control.
Adjustment value:1.26V
Standard value:1.255 to 1.27V
MAIN BOARD (SIDE A)
TP603
TP903
(VD) TP602
C559
C529
C558
C557
56 55
digital
Q501
1
voltmeter
TP903(VD)
3. Press X key to write the adjustment value.
TP917
(VL)
D902
Q901
TP604
C806 C601
5 4
TP601
IC801
1
8
C805
R827
R805
TP533
C604
R807
CN551
50 45 43
1
42
5-4-5.Electrical offset adjustment method
Note: Doing adjustment by the state that a disc does not enter.
1. Confirm the power voltage is 1.5V.
2. Set to the test mode.
3. Press the – key activates the overall adjustment mode.
LCD display
000 Assy11
4. Press the DISPLAY key.
LCD display
030 Ofst**
5. If result of electrical offset adjustment is OK,the following dis-
play appears.
LCD display
030 OfstOK
5-5. OVERALL ADJUSTMENT MODE
5-5-1. Overall adjustment mode structure
TEST MODE
(Display Check Mode)
VOLUME – key
Overall Adjustment
Title Display(ASSY**)
key
.
key
> N
DISPLAY key
PLAY MODE key
Note: The overall adjustments should be always performed in the
sequence of CD t MO adjustments.
5-5-2. Overall CD and MO adjustment method
1. Set the TEST MODE and press – key to set the Overall Ad-
justment mode.
LCD display
R
000 Assy11
2. Insert CD disc in the set, and press . key to set the Overall
CD Adjustment mode.
Automatic adjustments are made.
LCD display
XXX CD RUN
XXX: Item No. for which an adjustment is being executed.
MZ-E909
key
x
CD overall
Adjustment
key
> N
key
x
MO overall
Adjustment
key
x
Electrical offset
Adjustment key
key
x
Power Supply
Adjustment
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