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MZ-E501
5-4. MANUAL POWER ADJUSTMENTS
5-4-1. Adjustment sequence
The adjustments should be always performed in the following
sequence:
1 Vc PWM Duty (L) adjustment (item No.:762)
r
2 Vc PWM Duty (H) adjustment (item No.:763)
r
3 VLL 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. To set the overall adjustment mode, press VOL– key.
LCD display
4. Press PLAY MODE key, and item No. will change to 762.
LCD display
SECTION 5
ELECTRICAL ADJUSTMENTS
5-1. GENERAL
In this set, CD and MO discs can be automatically adjusted by setting
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:
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
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
Overall adjustment mode
Manual mode
Manual mode
3. Press X key on the remote control.
LCD display
4. Press X key on the remote control again.
LCD display
5. Press x key to terminate the Manual mode and return to the
TEST MODE.
021 Res NV CC
021 Res OK?
021 Res ***
021 Reset!
After reset is completed.
5. Connect a digital voltmeter to TP901 (VC) on the main board
and adjust VOL+ key (voltage up) and VOL– key (voltage
down) on the remote control.
Adjustment value:2.36V
Standard value:2.35 to 2.365V
MAIN BOARD (SIDE B)
762 VclPWM XX
6. Press X key to write the adjustment value. Item No.will change
to 763.
000 Assy 00
TP901 (VC)
digital voltmeter