USED ICs:
- KA5Q0765RT = POWER SUPPLY
- OM8370 / TDA9370 = CPU + SIGNAL PROCESSOR
- STV9302A = FIELD DRIVER
- AN7522N = SOUND DRIVER
- TC4052BP = AV SWITCH
- AT24C08 = MEMORY
- PC817B = PHOTO-COUPLER (POWER SUPPLY)
- HS 0038A2 = IR-RECEIVER
- L7808CV = 8V REGULATOR IC
- L7805CV = 5V REGULATOR IC
TO ENTER SERVICE MODE
Make sure the +B voltage is (110VDC). Can be adjusted by (VR-501).
- Press "Menu" key to display picture menu.
- Press digit keys [6 => 4 => 8 => 3] will display 'M" on screen.
- Push "Standby" key once to 'Exit" factory mode.
TO SELECT MENUS IN FACTORY [SERVICE] MODE.
In factory mode {M} mode there are [10] menus totally. Menu-1 to Menu-4 can be selected directly; but Menu-5 to Menu-0 must be selected by these steps:
- Press "Call" key, to call "M".
- Press 'Lock" key, then press any one numeric key fro 5 to 0.
For example, to select Menu-7; press "Call" key and 'Lock' key in turns, then press the numeric key [7].
