12
MZ-E900
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
4. Press the DISPLAY key.
LCD display
5. If result of electrical offset adjustment is OK,the following dis-
play appears.
LCD display
5-5. OVERALL ADJUSTMENT MODE
5-5-1. Overall adjustment mode structure
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
2. Insert CD disc in the set, and press . key to set the Overall
CD Adjustment mode.
Automatic adjustments are made.
LCD display
XXX: Item No. for which an adjustment is being executed.
5-4-3. Vc PWM Duty (H) adjustment method
1. Set the Manual mode and set the item No. to 763.
LCD display
2. Connect a digital voltmeter to TP901(VC) on the main board
and adjust + key and – key on the remote control.
Adjustment value:2.75V
Standard value:2.735 to 2.765V
MAIN BOARD (SIDE A)
3. Press X key to write the adjustment value.
5-4-4. Vl PWM Duty adjustment method
1. Set the Manual mode and set the item No. to 764.
LCD display
2. Connect a digital voltmeter to TP917 (VL) on the main board
and adjust + key and – key on the remote control.
Adjustment value:2.23V
Standard value:2.22 to 2.235V
MAIN BOARD (SIDE A)
3. Press X key to write the adjustment value.
LCD display
763 VchPWM XX
764 VlPWM XX
D902
C904
C903
L903
L
904
L902
TP917
(VL)
digital voltmeter
TP917
(VL)
000 ADJ OK
000 Assy11
030 Ofst**
030 OfstOK
TEST MODE
(Display Check Mode)
Overall Adjustment
Title Display(ASSY**)
CD overall
Adjustment
.
key
VOLUME – key
key
x
MO overall
Adjustment
> N
key
> N
key
key
x
Electrical offset
Adjustment key
DISPLAY key
key
x
key
x
Power Supply
Adjustment
PLAY MODE key
XXX CD RUN
000 Assy11
R921
R920
R950
R901
R903
R948
R946
C918
C915
C917
C905
D903
C911
C919
C920
1
5
10
14
15202528
43
29
30
35
40
45 50 5556
42
IC901
TP901 (VC)
TP901 (VC)
digital voltmeter