Pioneer PDP-5071PU Service Manual page 121

5
2 Actual Vofs adjustment (1)
(From 1 )
Perform aging with RST MASK 01
(white) displayed for 3 seconds:
Set to RST MASK 09 (red 760).
Set VOL OFFSET to 246 (60 [V] ).
Are there any dark cells?
Gradually decrease Vofs data
until dark cells disappear (Vofs should
be 005 (15 [V]) or more).
Is Vofs_max1 118 (36 [V])
or greater?
Return the Vofs value to the tentative
voltage setting.
Perform aging with RST MASK 01
(white) displayed for 3 seconds:
Set to RST MASK 19 (red R1023+).
Set VOL OFFSET to 246 (60 [V] ).
Are there any dark cells?
Gradually decrease the Vofs data
until dark cells disappear (Vofs should
be 005 (15 [V]) or more).
Is Vofs_max2 118 (36 [V])
or greater?
Return the Vofs value to the tentative
voltage setting.
(To 3 )
5
6
(Check Vofs_max1 with the red 760 signal.)
MKS S51
MKS S59
VOF 246
No
Note:
Yes
This setting value becomes the value
VOF ∗∗∗
for Vofs_max1.
No
Yes
Note:
VOF ∗∗∗
This is for checking the lower limit of Vofs accurately.
(Check Vofs_max2 with the red 1023+ signal.)
MKS S51
MKS S69
VOF 246
No
Note:
Yes
This setting value becomes the value
VOF ∗∗∗
for Vofs_max2.
No
Yes
Note:
This is for checking the lower limit of Vofs accurately.
PDP-5071PU
6
7
Set Vofs_max1 to 246 (60 [V]).
Replace the panel
again or abnormality
in circuits
Set Vofs_max2 to 246 (60 [V]).
Replace the panel
again or abnormality
in circuits
7
8
Vofs_max1
[V]
Note: Take note of the value
for Vofs_max1.
Vofs_max2
[V]
Note: Take note of the value
for Vofs_max2.
121
8
A
B
C
D
E
F