PIONEER PRO-507PU
Service Manual

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3 Actual Vofs adjustment (2)
A

(From 2 )
(Check the upper limit of Vofs with the green 1023 signal.) Set to RST MASK 03 (green 1023). MKS S53

Set VOL OFFSET to 246 (60 [V] ).

VOF 246

Are there any dark cells? Yes
B

No

Set Vofs_max3 to 246 (60 [V]).

Gradually decrease the Vofs data until dark cells disappear (Vofs should be 005 (15 [V]) or more).

VOF ���

Note: This setting value becomes the value for Vofs_max3.

Vofs_max3

[V] Replace the panel again or abnormality in circuits
Note: Take note of the value for Vofs_max1.

Is Vofs_max3 118 (36 [V]) or greater? Yes

No

(Check the upper limit of Vofs with the blue 1023 signal.)
C

Set to RST MASK 04 (blue 1023).

MKS S54

Set VOL OFFSET to 246 (60 [V] ).

VOF 246

Are there any dark cells? Yes Gradually decrease the Vofs data until dark cells disappear (Vofs should be 005 (15 [V]) or more). VOF ���

No

Set VOL OFFSET_max4 to 246 (60 [V]).

Note: This setting value becomes the value for Vofs_max4.

Vofs_max4

[V]
Note: Take note of the value for Vofs_max2.

D

Is Vofs_max4 118 (36 [V]) or greater? Yes

No

Replace the panel again or abnormality in circuits

Vofs_max
Set the lowest voltage among Vofs_max1, Vofs_ max2, Vofs_max3, and Vofs_max4 as Vofs_max.
E

[V]
Yes

Is Vofs_max 187 (49 [V]) or greater? No Value for Vofs = Vofs_max - 48 (9 [V])

Value for Vofs = 139 (40 [V])

Set the value as Vofs.
F

(To 4 )

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PDP-5071PU
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