Grundig DAVIO 37 P 37-2201 Service Manual page 15

Chassis 12.6
Alignment
Start of the Service Mode: Via " " (Dialog Center) –> Service –> "OK" –> Service Code "8500".
End the Service Mode: Press button "TXT".
Measuring instruments: 100MHz oscilloscop with 10:1 test probe, digital voltmeter, colour video generator.
Service works after replacement or repair of the following modules:
- Power supply: alignment 1
- IF: alignment 2
- IC101 (Video IC), EEPROM: alignment 2
- CRT, CRT panel: alignment 6...8
- Deflection: alignment 7
- IC402: alignment 2...5 and 7...8
- Tuner: alignment 2 and 3
Alignment
This voltage must be checked and re-adjusted if necessary
1. +B voltage
after every repair and before every alignment.
Brightness:
Contrast:
Digital voltmeter:
2. IF Start the Service Mode; call up the dialog line "Video" via
menu 1 (red button) with button
B/G,D/K,I Standard Feed in a standard signal of a TV station. Set fine tuning to
"00" and store it via "OK".
Start the Service Mode; call up the dialog line "AFT38" via
menu 4 (blue button) with button
3. Tuner AGC 100MHz oscilloscope: Channel A: Tuner contact 11
Colour video generator: Feed in a colour scale (with
Start the Service Mode; call up the dialog line "AGC" via
menu 1 (red button) with button
3.1 "2.AGC" Call up the dialog line "2.AGC" with button
B/G,D/K,I Standard
4. OSD Start the Service Mode; call up the dialog line "OSD.H" and
"OSD.V" via menu 2 (green button) with button
5. OEM Start the Service Mode; call up the dialog line "OEM" via
menu 1 (red button) with button
Start the Service Mode; call up the dialog line "SCRN" via
6. Screen grid
voltage menu 3 (yellow button) with button
Switch on the horizontal line with button
GRUNDIG Service
Preparations
Minimum
Minimum
Cathode D607
.
or .
Ground: Tuner
switched-off sound carrier) via the
aerial: channel 32; 70±1dBµV.
or .
or .
or
or .
or .
or .
Alignment Process
Adjust +B to the values below with P601:
Size CRT
14" A34LPE02X01
20" A48ECR43X51
21" A51EER133X41
With button set to "NEW".
End the Service Mode.
With button or set the right Hex-value to 78-7C
(e.g.: AFT38 87 79).
End the Service Mode.
With button or set to the following values:
PAL B/G standard
PAL/SECAM B/G/D/K standard 750mV
PAL I standard
End the Service Mode.
With button or set the same value like AGC value less 5.
Example: AGC = 48 -> 2.AGC = 48 - 5 = 43
End the Service Mode.
With button or position the picture to the center of the
. screen. End the Service Mode.
With button or set to "off".
End the Service Mode.
With "SCREEN" control (lower control at the splitter
transformer) adjust the line so that it is just well visible.
Abgleich / Alignment
Voltage Value
106V
118V
118V
±
750mV 20mV
pp pp
±
20mV
pp pp
±
700mV 20mV
pp pp
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