Grundig DAVIO 37-2201 TV Service Menu
Grundig Chassis 12.5
DAVIO 37 P 37-2201 GBA0700
DAVIO 37 P 37-4201 TOP GBA0800 GBA0801
DAVIO 37 P 37-4201/5 TOP GBA1100
DAVIO 51 T 51-4201 TOP GBA0900 GBA0901
DAVIO 51 T 51-4201/5 TOP GBA1200
DAVIO 55 T 55-4201 TOP GBA1000 GBA1001
DAVIO 55 T 55-4201/5 TOP GBA1300
Enter to Grundig Television service mode
Start of the Service Mode: Via "i" (Dialog Center) –> Service –>
"OK" –> Service Code "8500". Activate menus 1 to 4 via buttons "red", "green", "yellow" and "blue".
End the Service Mode: Press button "TXT".
Grundig Television service mode Basic Settings
The following table shows all basic settings in the service mode. In addition all values marked with * and ** must be adjusted according to adjustment (page 2 - 3).
2. Change of the Memory IC402
After changing IC402 all settings in the service mode must be done according to the table "Basic Settings" (point 1).
3. Hotel Mode
3.1 Activating the Hotel Mode
The Hotel Mode can be activated via Service Mode (menu 1).
Select point of menu "Hotel" with button or , with button or set to "YES". End the Service Mode.
With activated Hotel Mode:
- only the "SLEEP TIMER" can be selected in the "Dialog Center".
- the last volume setting is stored as the maximum level possible
(H.VOL in menu 1 of the Service Mode).
3.2 Deactivating the Hotel Mode
Press and hold button " " on the remote control handset while switching the TV set on with the mains switch. Select point of menu "Hotel" in menu 1 of Service Mode via button or , set with button or to "NO".
4. Cancelling the Parental Lock Continuously To cancel the parental lock enter the number "7038".
5. ATS Reset (Automatic Tuning System)
Press the power "ON" button while pressing button "L+" on the Remote Control –> Language Selection –> Country Selection -> "OK".
The ATS system stops at every station of acceptable reception quality (AFC and coincidence) and stores the station data and the respective standard automatically. The system then continues searching.
Pressing the "TXT" button stops the ATS function. If ATS will be stopped before storing anyone station, ATS will start again when switching on the TV again.
6. Software Version Number The software version number is shown after ending the service mode.
Grundig Television service mode 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
DAVIO 37 P 37-2201 GBA0700
DAVIO 37 P 37-4201 TOP GBA0800 GBA0801
DAVIO 37 P 37-4201/5 TOP GBA1100
DAVIO 51 T 51-4201 TOP GBA0900 GBA0901
DAVIO 51 T 51-4201/5 TOP GBA1200
DAVIO 55 T 55-4201 TOP GBA1000 GBA1001
DAVIO 55 T 55-4201/5 TOP GBA1300
Enter to Grundig Television service mode
Start of the Service Mode: Via "i" (Dialog Center) –> Service –>
"OK" –> Service Code "8500". Activate menus 1 to 4 via buttons "red", "green", "yellow" and "blue".
End the Service Mode: Press button "TXT".
Photo credit to www.wotif.com
Grundig Television service mode Basic Settings
The following table shows all basic settings in the service mode. In addition all values marked with * and ** must be adjusted according to adjustment (page 2 - 3).
2. Change of the Memory IC402
After changing IC402 all settings in the service mode must be done according to the table "Basic Settings" (point 1).
3. Hotel Mode
3.1 Activating the Hotel Mode
The Hotel Mode can be activated via Service Mode (menu 1).
Select point of menu "Hotel" with button or , with button or set to "YES". End the Service Mode.
With activated Hotel Mode:
- only the "SLEEP TIMER" can be selected in the "Dialog Center".
- the last volume setting is stored as the maximum level possible
(H.VOL in menu 1 of the Service Mode).
3.2 Deactivating the Hotel Mode
Press and hold button " " on the remote control handset while switching the TV set on with the mains switch. Select point of menu "Hotel" in menu 1 of Service Mode via button or , set with button or to "NO".
4. Cancelling the Parental Lock Continuously To cancel the parental lock enter the number "7038".
5. ATS Reset (Automatic Tuning System)
Press the power "ON" button while pressing button "L+" on the Remote Control –> Language Selection –> Country Selection -> "OK".
The ATS system stops at every station of acceptable reception quality (AFC and coincidence) and stores the station data and the respective standard automatically. The system then continues searching.
Pressing the "TXT" button stops the ATS function. If ATS will be stopped before storing anyone station, ATS will start again when switching on the TV again.
6. Software Version Number The software version number is shown after ending the service mode.
Grundig Television service mode 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