Alignment; Chassis Board / Crt Panel - Grundig Melbourne SE 7212 TOP Serviceanleitung

CUC 2032 / 2033

Alignment

GB
Attention!
1. After any repair or replacement of NVM (IC82005) check whether the NTSC 3.58MHz quartz is fitted. If it is not, the dialog line "NTSC 3,6" in the
Service Menu must be set to "off".
Button " " –> "OK" –> "SERVICE" –> "OK" –> Service Code "8500" –> NTSC 3,6 "off" and in dialog line "End" store the setting "with mem.".
2. When no SAT Receiver (SER 250) is built in, SAT in the Service Menu is to be set to "off".
Button " " –> "OK" –> "SERVICE" –> "OK", select dialog line "SAT" and switch to "off".
All adjustment controls not mentioned in this description are pre-set at the factory and must not be re-adjusted in the case of repairs.
Chassis / CRT Panel
Measuring instruments: Dual-channel oscilloscope, 10:1 test probe, digital voltmeter, colour video generator, spectrum analyser or RF millivoltmeter
Service works after replacement or repair of the following modules:
- Power supply: alignment 1
- Tuner: alignment 2
- NVM IC82005: alignment 2...8, 11
- Horizontal and vertical deflection and replaced picture tube: alignment 10...12
- Bridge Coil L53074: only necessary in the case of inexpert manipulation of the horizontal deflection: alignment 9
Alignment
1. +A voltage This voltage must be checked and re-adjusted if necessary
after every repair and before every alignment.
Brightness: Minimum
Digital voltmeter: Cathode D61016
2. Tuner AGC Spectrum analyser or RF millivoltmeter symmetrical to
tuner contact 10, 11.
Feed in a standard test pattern or generator via the aerial,
70...80dBµV.
Call up the dialog line "AGC" via " " (DIALOG CENTER) –>
"OK" –> SERVICE –> "OK" –> Service Code "8500".
3. OSD Call up the dialog line "OSD" via " " (DIALOG CENTER) –>
"OK" –> SERVICE –> "OK" –> Service Code "8500".
4. Tube Call up the dialog line "Tube" via " " (DIALOG CENTER) –>
(Type of picture "OK" –> SERVICE –> "OK" –> Service Code "8500".
tube)
Only with IC TDA8843 or TDA8844 as well as with Philips
5. Overscan
72cm/84cm in 4:3 and 70cm/82cm in 16:9 format picture
tubes.
Call up the dialog line "Overscan" via " " (DIALOG
CENTER) –> "OK" –> SERVICE –> "OK" –> Service Code
"8500".
6. NTSC 3.6 Call up the dialog line "NTSC 3,6" via " " (DIALOG
CENTER) –> "OK" –> SERVICE –> "OK" –> Service
Code "8500".
7. Vertical Slope Call up the "Vertical Slope" menu via " " (DIALOG CENTER)
–> "OK" –> SERVICE –> "OK" –> Service Code "8500" –>
"GEOMETRY"
GRUNDIG Service
Preparations
Alignment Process
Adjust R60037 or R61313 acc. to the table (page 3-18) on
the power supply circuit diagram.
Adjust 102dBµV (360mV ) with button "
pp
Alternatively, without using a spectrum analyser or RF
millivoltmeter, adjust the picture with button "
so that noise just appears on the screen. Then reset until
the picture is again free of noise.
Dialog line "End", terminate "with mem".
With button " -" or "+ " position the menu in the
middle of the picture.
Dialog line "End", terminate "with mem.".
With button " -" or "+ " enter the correct screen
diagonal.
Dialog line "End", terminate "with mem.".
Set to "off" with button " -" or "+
Dialog line "End", terminate "with mem.".
Set to "off" or "on" with button "
on the type of television receiver.
Dialog line "End", terminate "with mem.".
Adjust the center line of the test pattern in the dialog line
"Vertical Slope" (typ. 30...33) with button "
so that it is just still visible.
Press button " " twice (GEOMETRY –> SERVICE) and
terminate the dialog line "End" with "with mem.".
The picture geometry is adjusted to the value last stored
whenever the TV set is switched on.
Abgleich / Alignment
-" or "+ ".
-" or "+ "
".
-" or "+ " dependent
-" or "+ "
2 - 3