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MZ-E909
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
7 Rewrite the NV value
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.
12
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 Vl PWM Duty adjustment (item No.:764)
r
3 Vd PWM Duty adjustment (item No.:765)
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:2.35V
Standard value:2.34 to 2.355V
MAIN BOARD (SIDE A)
R909
C921
C908
28
25
20
R903
29
IC901
30
C905
digital voltmeter
5. Press X key to write the adjustment value.
TP901
(VC)
D903
15
14
R964
10
TP901 (VC)
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