Pioneer PDP-6071PU Service Manual page 126

1
4 Actual Vofs adjustment (3)
A
Perform aging with RST MASK 01
(white) displayed for 3 seconds:
Set to RST MASK 19 (red 1023+).
Set VOL OFFSET to 255 (60 [V] ).
B
Are there any dark cells?
Gradually decrease Vofs data
until dark cells disappear (Vofs should
be 024 (15 [V]) or more).
Is Vofs_max1 113 (32 [V])
C
Return the Vofs value to the tentative
voltage setting.
Perform aging with RST MASK 01
(white) displayed for 3 seconds:
Set to RST MASK 20 (green1023+).
D
Set VOL OFFSET to 255 (60 [V] ).
Are there any dark cells?
Gradually decrease the Vofs data
until dark cells disappear (Vofs should
be 024 (15 [V]) or more).
E
Is Vofs_max2 113 (32 [V])
Return the Vofs value to the tentative
voltage setting.
F
126
1
2
(From 3 )
(Check Vofs_max1 with the red 1023+ signal.)
MKS S51
MKS S69
VOF 255
Yes
VOF ∗∗∗
or greater?
Yes
VOF ∗∗∗
(Check Vofs_max2 with the green 1023+ signal.)
MKS S51
MKS S70
VOF 255
Yes
VOF ∗∗∗
or greater?
Yes
(To 5 )
2
3
No
Set Vofs_max1 to 255 (60 [V]).
Note:
This setting value becomes the value
for Vofs_max1.
Replace the panel
No
again or abnormality
in circuits
Note:
This is for checking the lower limit of Vofs accurately.
No
Set Vofs_max2 to 255 (60 [V]).
Note:
This setting value becomes the value
for Vofs_max2.
Replace the panel
No
again or abnormality
in circuits
Note:
This is for checking the lower limit of Vofs accurately.
PDP-6071PU
3
4
Vofs_max1
[STEP]
Note: Take note of the value
for Vofs_max1.
Vofs_max2
[STEP]
Note: Take note of the value
for Vofs_max2.
4