19
MZ-E505
000
XXX
NG
000
CD OK
XXX
MO RUN
5-4-3. VI PWM Duty adjustment
Connection:
Procedure:
1. Set the Manual mode and set the item No. to 764.
LCD display
2. Connect a digital voltmeter to TP904 (VL) and TP921 (GND)
on the main board and adjust VOL + (Voltage up) and VOL –
(Voltage down) on the remote control.
Adjustment value:2.23V
Standard value:2.22 to 2.235V
3. Press
X
key to write the adjustment value.
5-4-4. Vb A/D value check
1. Set the Manual mode and set the item No. to 731.
LCD display
2. Confirm the A/D value is 73 to 87 hex.
3. Confirm the power supply consumiption current is 120 mA or
less.
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. Turn the control towards VOL – activates the overall adjust-
ment 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 turn the control towards VOL – to
set the Overall Adjustment mode.
LCD display
2. Insert CD disc in the set, and turn the control towards
.
to
set the Overall CD Adjustment mode.
Automatic adjustments are made.
LCD display
XXX: Item No. for which an adjustment is being executed.
3. If NG in the overall CD adjustments, return to Reset NV and
perform from the electrical offset adjustment again.
LCD display
XXX: NG item No.
4. If OK through the overall CD adjustments, then perform overall
MO adjustments.
LCD display
5. Insert MO disc in the set, and turn the control towards
> N
to set the Overall MO Adjustment mode. Automatic adjustments
are made.
LCD display
XXX: Item No. for which an adjustment is being executed.
731
Vb_AD XX
764
VlPWM XX
000
Assy11
035
Ofst**
000
OfstOK
TEST MODE
(Display Check Mode)
Overall Adjustment
Title Display(ASSY**)
CD overall
Adjustment
.
key
x
MO overall
Adjustment
> N
> N
key
x
Electrical offset
Adjustment key
DISPLAY key
key
x
key
x
Power Supply
Adjustment
PLAY MODE key
VOL
XXX
CD RUN
000
Assy11
digital
voltmeter
MAIN board
TP904 (VL)
TP921 (GND)