Philips PM32671 Service Manual page 77

5.4. SURVEY OF ADJUSTING ELEMENTS AND AUXILIARY EQUIPMENT
ADJUSTMENT
ILEMENT
POWER SUPPLY
31474
Supply voltage adjustment
1476
Current sensing
31471
-1 500V supply voltage
CRT DISPLAY ADJUSTMENTS
31504
Intensity
3401
lntens ratio
R14
Trace rotation
Astigmatism
Geometry
BALANCE ADJUSTMENTS
R547
Attenuator balance
channel A (B)
R571
Normal-Invert balance
channel A (B)
Final Y-amplifier balance
R660
Added balance
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ADJUSTING RESULT
- + -
or
Extra load between pin 2 (+14V) and
pin 1 of X858. Adjust so that current
limit point is just not reached.
-1 500V or -3°/oo on pins 7 and
14 of the c.r.t. socket.
Point i s just visible
DTB-trace must be well distinguished
from MTB-trace
Trace runs exactly in parallel with the
horizontal graticule line
Trace as sharp as possible
Displayed vertical lines as straight as
possible and signal must fall between
hatched area shown in Fig. 5.4.
Trace jump minimal (AMPLIDIV
setting 2mV and 5mV)
Trace jump minimal (AMPLIDIV
setting 10mV and 20mV)
Trace jump minimal
Trace in vertical mid of screen
Trace jump minimal when switching
to added.
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RECOMMENDED INSTRUMENT
AND INPUT SIGNALS
Digital multimeter
Digital multimeter and HV probe
Function generator (sine-wave
signal 10kHz)
Function generator (sine-wave
signal 100kHz and
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CHAPTER FIGURES
5.5.1 .I.
5.5.1.2. 5.3.
5.5.1.3.
5.5.2.1. 5.1.
5.5.2.2. 5.1.
5.5.2.3. 4.1.
5.3.
5.5.2.4.
5.5.2.5.
5.5.3.1. 5.2.
5.5.3.1. 5.2.
5.5.3.2. 5.2.
5.2.
5.5.3.3.
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