– 15 –
2. Connect a digital voltmeter to TP903 on the main board and
adjust + key and – key on the remote control so that the
voltage is at 2.25V
+5 mV
.
SECTION 5
ELECTRICAL ADJUSTMENTS
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:
5-2-3. Power
The power is supplied with 1.5 V DC from the DC IN jack.
5-3. RESET NV
5-3-1. How to reset NV
1. Set the TEST MODE. (See page 11)
2. Set the Manual mode and set the item No. 021, Reset NV. (See
page 12)
LCD display
1
Reset NV (Clear the memory)
2
Manual power adjustments
3
Overall CD adjustments
4
Overall MO adjustments
Overall adjustment 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.
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
Vrem PWN duty (L) adjustment (item No.:764)
r
3
Vc PWM duty (H) adjustment (item No.:765)
r
4
Vrem PWM Duty (H) adjustment (item No.:766)
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. (See page 11)
3. Set the Manual mode and set the item No. to 762. (See page 12)
LCD display
021
Res NV
021
Res OK?
021
Res ***
021
Reset!
After reset is completed.
4. Connect a digital voltmeter to TP901 on the main board and
adjust + key (voltage up) and – key (voltage down) on the
remote control so that the voltage is at 2.32V
+5 mV
.
762
VclPWM
–10 mV
–10 mV
5. Press
X
key to write the adjustment value.
Note :
Do not Press the
X
key if the adjustment value is already
set.
5-4-3. Vrem PWM Duty (L) adjustment method
1. Set the Manual mode and set the item No. to 764. (See page 12)
LCD display
TP901 (VC)
TP912 (GND)
Main board
Digital
voltmeter
3. Press
X
key to write the adjustment value.
Note :
Do not Press the
X
key if the adjustment value is already
set.
764
VrlVcl
TP903 (VR)
TP912 (GND)
Main board
Digital
voltmeter
