Electrical Adjustment - Philips VR299/55 Service Manual

SECTION 3
ELECTRICAL ADJUSTMENT
3.1 PRECAUTION
Electrical adjustment are required after replacing circuit
components and certain mechanical parts. !t is important
to perform these adjustments only after all repairs and
replacements have been completed. Also do not attempt
these adjustments unless the proper equipments is avail-
able.
3.1.4 Required test equipment
@ Colour television or monitor
@ Oscilloscope: wide-band,dual-trace, triggered delayed
sweep
@ Frequency counter __ aarp ;
@® Signal generator: RF/IF sweep/marker
® Signal generator: PAL colour bar, stairstep
© Recording tape
@ Digit-key remote controller{provided)
3:1.2 Required adjustment tools
Alignment tape
(SP.stairstep)
4822 397 30262
Presetting unit
4822 395 90915
3.1.3 Colour bar signal,colour bar pattern
@ PAL colour bar signal
White(100%)
White(75%)
O7V Burst
Vv ms
O3V
0.3 V
a Vv U
Horizontal... siete MIREY): 2
Fig. 3-1-1 PAL colour bar signal waveform
@ PAL colour bar pattern
(75%} otis
Fig. 3-1-2 PAL cotour bar pattern
Note:
The system control circuit of this model
has an automatic recognition about the
ON-OFF control of the DOCTOR SYSTEM.