Sub Picture Adjustment - Hitachi C47-WD8000 Service Manual

SERVICE ADJUSTMENTS
(2) Give offset the brightness data shown in below
DP5M
Offset data

2.18 SUB PICTURE ADJUSTMENT

Adjustment procedure
(1) Display sub Picture on the screen.
Receive SYSTEM B.G Phillips pattern in Main picture
Receive SYSTEM D.K Phillips pattern in Sub picture
(2) Observe P852 on the CPT P.W.B. and change the SUB CONTRAST (Item No. 68) of service mode by
using jig R/C and adjust so that the amplitude of the sub-picture is the same as that of the
main-picture.
(3) Press "ENTER" key to write the data.
* Adjustment specification
* Quality control specification : ±3V
* Wave form of P852 = Cathode
(Sub picture level compared with main picture level)
MAIN PICTURE
* Perform this adjustment after the white balance and sub-brightness adjustments of the main
picture are completed.
* White balance 14000K±0 MPCD
(Color coordinates: x=0.266 y=0.270)
43" 50"
-5 -4
: ±1V
1H
CATHODE WAVE FORM
47" 52"
-5 -5
WHITE
(CATHODE VOLTAGE)
69
57"
-4