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Abgleich / Alignment
CUC 5365
2. Picture Tube Panel
Measuring instruments: Oscilloscope with 10:1 test probe, high-resistance voltmeter
Service works after replacement or repair of:
the picture tube panel, alignment 1.1 and 1.2
1.1 White balance
Feed in a FuBK test pattern.
Set the controls VG and VB so that no discolouration is
@ minimum, & nominal value, @ maximum
visible in the grey scale.
1.2 Screen grid
- Feed in a test pattern.
- With the control SG on the picture tube panel set the
voltage
- Adjust the screen brightness with the remote control
voltage to 175V.
handset so that the grey aeras just become dark.
- If flyoack lines are visible on the screen, reduce the
- Switch the TV receiver to AV mode.
voltage by 10V approximately.
- Connect a voltmeter (200 kQ series resistance) to the
test points R, G, B to determine the test point with the
highest voltage level.
ees
rs
black level
165-175V
2. Colour-RGB
Measuring instruments: Dual-beam oscilloscope with 10:1 test probe.
Service works after replacement of 1C5080, F5013, F5046, F5051, F5083.
| Alignment
| |
Preparations
|
Alignment Process
|
Process
2.1
a
ee
ered
in a PAL test pattern.
ae
the filter F5013 for minimum colour carrier of the Y-
colour trap
Oscilloscope to 1C5120-(17).
signal.
2.2 Colour
Connect IC5080-(28) TDA4650 to +12V.
Adjust the trimmer C5073 to stop the colour bars moving
synchronization
} Connect iC5080- i si
7) TDA4650 to ground.
across the screen.
Remove the connections.
2.3 Colour
Oscilloscope to emitter of the transistor T5048.
Adjust the filter F5046 to obtain the maximum colour carrier.
decoupling
2.4 SECAM
Feed in a SECAM test pattern:
By adjusting the filter F5083
and the control R5083
demodulator
Oscilloscope channel 1 to 1C5100-(11)
alternately, set the zero lines of the (B-Y)-signal and the
Oscilloscope channel 2 to 1C5100-(12)
(R-Y)-signal to the line blanking level.
Note: Start with F5083.
=
bring to coincidence
overshoots
correctly adjusted
2.5 SECAM
Oscilloscope to 1C5100-(12).
With F5051 adjust the (B-Y)-signal of a colour staircase for
gaussian filter
symmetrical and minimum overshoots.
2.6 NTSC synchron- | Feed in a NTSC test pattern.
Adjust the trimmer C5071 to stop the colour bars moving
ization only
1C5080-(26) to +12V.
across the screen.
multi-module
1C5080-(17) to ground.
Remove the connections.
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