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5-1. GENERAL
In this set, CD and MO discs can be automatically adjusted by set-
ting the Overall Adjustment mode within the TEST MODE,
Before performing these automatic adjustments, it is necessary to
clear the memory and adjust the power in the Manual mode.
5-2. NOTES FOR ADJUSTMENT
5-2-1. Jigs
• CD disc
TDYS-1 (part code: 4-963-646-01)
• MO disc
PTDM-1 (part code: J-2501-054-A)
or commercially available MO disc (recorded)
• Digital voltmeter
5-2-2. Adjustment sequence
The adjustments should be always performed in the following
sequence:
1 Reset NV (Clear the memory)
2 Manual power adjustments
3 Electrical offset adjustments
(Do not enter the disc)
4 Overall CD adjustments
5 Overall MO adjustments
6 RESUME clear
5-2-3. Power
The power is supplied with 1.5 V DC from the battery case.
5-3. RESET NV
5-3-1. How to reset NV
1. Set the TEST MODE.
2. Set the Manual mode and set the item No. 021, Reset NV.
LCD display
021 Res NV CC
3. Press X key on the remote control.
LCD display
021 Res OK?
4. Press X key on the remote control again.
LCD display
021 Res ***
After reset is completed.
021 Reset!
5. Press x key to terminate the Manual mode and return to the
TEST MODE.
SECTION 5
ELECTRICAL ADJUSTMENTS
Manual mode
Overall adjustment mode
5-4. MANUAL POWER ADJUSTMENTS
5-4-1. Adjustment sequence
The adjustments should be always performed in the following se-
quence:
1 Vc PWM Duty (L) adjustment (item No.:762)
r
2 Vc PWM duty (H) adjustment (item No.:763)
r
3 Vl PWM Duty adjustment (item No.:764)
5-4-2. Vc PWM Duty (L) adjustment method
1. Confirm that the power voltage is at 1.5 V DC.
2. Set the TEST MODE.
3. Set the overall adjustment mode and press PLAY MODE key,
item No. will change to 762.
LCD display
762 VclPWM XX
4. Connect a digital voltmeter to TP901 (VC) on the main board
and adjust + key (voltage up) and – key (voltage down) on
the remote control.
Adjustment value:2.36V
Standard value:2.35 to 2.365V
MAIN BOARD (SIDE A)
R903
28
25
20
29
C905
30
IC901
R901
35
40
42
43
45
50
5556
C911
C915
C917
R950
TP901 (VC)
digital voltmeter
TP901 (VC)
5. Press X key to write the adjustment value. Item No.will change
to 763.
MZ-E900
D903
15
14
C918
10
R920
5
R921
1
11
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