Service manual

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GENERAL ADJUSTMENTSSPECIFIC INFORMATIONS
ITEMS NAMES SETTING
INPUT MEASURING MEASURING
ADJUSTING METHODS
ADJUSTMENT
SIGNALS POINTS INSTRUMENTS
STANDARS
High voltage
adjustment
(Unit)
fH. ADJ.
(Chassis)
HPOS
(Chassis)
CONTRAST :MAX BRIGHTNESS :CNT COLOUR :CNT TINT :CNT CNTRAST :MAX BRIGHTNESS :CNT COLOUR :CNT TINT :CNT CONTRAST :MAX BRIGHTNESS :CNT COLOUR :CNT TINT :CNT
Retoma signal • Retoma signal Retoma signal
Between T461-Z450 Between R431-GND D441-K (2V/div range) R4011-BB50 side (1V/div range)
High voltage meter Frequency counter Synchroscope
1) Perform connection of the high
voltage meter between T461-Z450 and adjust high pressure with R466.
1) Short-circuit test pin (H) and (+9V). 2) Adjust fH with R4055. 1) Adjust DC=0 of both wave forms to
the lowest line on the synchroscope.
2) Take measurement of 3 div. 3) Observe the wave forms at the two
points and make adjustments with the HPOS.
Horizontal oscillation frequency Horizontal phase
31.0±0.2kV
33.75± 0.15kHz A=0.76±0.1[µs]
D441 cathode wave form
3div
BB connector side wave form of R4011
0
A
ELECTRICAL ADJUSTMENT