Grundig Lenaro 72 Flat MF 72-5610 Service Manual page 11

GRUNDIG Service
Adjustment
Start of the Service Mode: via "
Call up the Menu: Press button
Adjustment:
Press button
Break of the Menu: Press button "
End the Service Mode: Press button "TXT".
Measuring instruments: digital voltmeter, colour video generator.
Service works after replacement or repair of the following modules:
– Power Supply: adjustment 1
– Feature Module: adjust all basic settings (page 2-5), adjustment 2 and 4
– CRT, CRT panel: adjustment 3, 4 and 5
– Deflection: adjustment 4
Adjustment
1. +B Voltage This voltage must be checked and re-adjusted if necessary
after every repair and before every alignment.
Set: .............................................................. AV operation
Brightness: ......................................................... Minimum
Contrast: ............................................................. Minimum
Digital voltmeter: .......................................
2. Video Colour video
Start the Service Mode with button "
Call up VIDEO ADJUSTMENTS with buttons
Call up SUBCARRIER with buttons
3. Screen Start the Service Mode with button "
Call up VIDEO ADJUSTMENTS with buttons
Call up SCREEN ADJ. with buttons
4. Geometry This adjustment must be done for PAL/SECAM (100HZ
GEOMETRY
(120HZ
Colour video
– at 100HZ
– ar 120HZ
Start the Service Mode with button "
Call up 100HZ GEOMETRY ADJUSTMENTS or 120HZ GEOME-
TRY ADJUSTMENTS with buttons
Call up the dialog line with buttons
– TILT
– VERTICAL ZOOM
– EHT TRESHOLD
– EHT TIME CONSTANT
– VERTICAL EHT1
– VERTICAL EHT2
– HORIZONTAL EHT1
– HORIZONTAL EHT2
Call up the dialog line with buttons
Vertical Amplitude – VERTICAL AMPLITUDE
Vertical Position – VERTICAL SHIFT
Vertical Linearity – LINEARITY
Vertical Correction – S_CORRECTION
Vertical Angel – VERTICAL ANGEL
Vertical Bow – VERTICAL BOW
– HORIZONTAL SHIFT
Horizontal Position
East/West – CUSION CORRECTION
Upper Corner – UPPER CORNER 1 und UPPER CORNER 2
– LOWER CORNER 1 und LOWER CORNER 2
Lower Corner
Horizontal OSD Pos. – HOR.OSD POSITION
Vertical OSD Pos. – VER.OSD POSITION
Horizontal Width – HORIZONTAL WIDTH
i
" –> Service Code "8500".
 P+ /  P– –> button "OK".
1 3
/ or /
(-10) (+10)
i
".
Preparations
generator: ...........feed in a FUBK test pattern
i
" –> "8500".
P+ / P–.
i
" –> "8500".
P+ / P–.
ADJUSTMENTS) seperately as well as NTSC
GEOMETRY ADJUSTMENTS).
generator:
GEOMETRY ADJ.: ......... feed in a PAL geometry
test pattern via aerial
GEOMETRY ADJ..: .... feed in a NTSC geometry
test pattern via Scart 1 (AV1)
i
" –> "8500".
P+ P–
/
P+ / P–:
P+ / P–:
4 6
, /
(-100) (+100).
Adjust +B with P601 dependent on the used CRT according
to the table on page 3-1.
Cathode D607
via aerial
Adjust the test pattern to pure with buttons
P+ P–
/ –>"OK". CARRIER indication "VALID").
End the Service Mode with button "TXT".
Set the value to "0" with buttons
P+ / P– –>"OK". Press button "OK" –> black screen and a line visible in the
middle of the screen.
Adjust SCREEN control at the diode splitt transformer, that
screen is black and the line is just visible.
End the Service Mode with button "TXT".
Set the type specific values according to the service table
–>"OK". (page 2-6 / 2-7) with buttons
4 / 6
(-100) (+100)
Adjust the test pattern with the buttons
3 4
,
(+10) (-100)
Is the adjustment range insufficient, set Horizontal Width to
255, than decrease EHT TRESHOLD.
2 - 
Chassis 22.1 ME
Adjustment Process

 
/ .
 
1
/ or
(-10)
.
 
/
6
/ .
(+100)

/ (SUB-
3
/ ,
(+10)
1
or /
(-10)