Read Sony ST-SA50ES Service Manual online
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NOTE : The preset data will be erased when this test mode is used. Therefore, take down the data before setting this mode and preset the data
again after completing operations in this mode.
2. Display Tube Check and KEY Check mode
NOTE : Do not perform this check mode when replacing display tubes or excepting when replacing a microcomputer.
1. Turn OFF the power.
2. While pressing 1 and MENU together, turn ON POWER .
3. While continuously pressing 1 and MENU together, check the following.
2. While pressing 1 and MENU together, turn ON POWER .
3. While continuously pressing 1 and MENU together, check the following.
Indication test pattern
* The indication test patterns from 2 to 5 are indicated on only even grids.
The display changes every 1 sec.
4. Release 1 and MENU . The KEY CHECK mode will be set.
5. All key numbers will be displayed.
5. All key numbers will be displayed.
Key Number : 24
6. Each time the key is pressed, the key number will be counted down.
Each key will be counted only once, at the first time.
7. When all keys have been pressed, the process will end.
NOTE : As contents of the Factory Preset will be written into memory after completing this check mode, delete contents of memory
according to 4. Forced RESET.
3. Entering the Factory Preset (In case perform just to write memory of the Factory Preset.)
1. Turn OFF the power.
2. While pressing 3 and MENU together, turn ON POWER .
2. While pressing 3 and MENU together, turn ON POWER .
4. Forced RESET (Used to delete the contents of Factory Preset when it is written into the preset memory.)
Clears all the RAMs and sets the initial state
1. Turn OFF the power.
2. While pressing 5 and MENU together, turn ON POWER .
1. Turn OFF the power.
2. While pressing 5 and MENU together, turn ON POWER .
5. How to select the frequency steps of the AM band
1. 9kHz step : while pressing 9 , turn ON POWER .
2. 10kHz step : while pressing 0 , turn ON POWER .
2. 10kHz step : while pressing 0 , turn ON POWER .
Microcomputer version indication (1 sec)
All light up “7F”
Dot area only “60”
Dot area only “7E”
Dot area only “3D”
Dot area only “5F”
1
7F
2
60
3
7E
4
3D
5
5F
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