Pioneer PDP-5070PU, Service Manual

Page: 121 / 219

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