Circuit Check - Toshiba 20N7XE Service Manual

13. V901 ADJUSTMENT
(Point) C.CRT adjusting magnetic field
(Adjusting magnetic field)
Correction field
Mid Near East
Russian
Asia, Hongkong
New Zealand, Australia
Adjusting procedure is based on working instruction of CPT Adjustment.
HIGH VOLTAGE CHECK
CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on this chassis. Checking should be done following the steps
below.
1. Connect an accurate high voltage meter to the second anode of the picture tube.
2. Turn on the receiver. Set the BRIGHTNESS and CONTRAST controls to minimum (zero beam current).
3. High voltage must be measured below (B) kV.
Refer to table-1 for high voltage (B).
(See SETTING & ADJUSTING DATA on page 18)
4. Vary the BRIGHTNESS control to both extremes to be sure the high voltage does not exceed the limit under any conditions.
perpendicular field
North field
North field
Zero field
South field
CIRCUIT CHECKS
– 17 –
Adjusting
perpendicular field
35 µT
35 µT
5 µT
–50 µT
Confirming
35 µT
35 µT
5 µT
–50 µT