Used ICs: TC4066BP – TC4053BP – TMPA8803CSN – 24C08 - STV9302 – MSP34X5G – MC44608 – TDA7057AQ
Initialization
Press
sound-effect under factory mode, the set will initialize, until “OK” appears on
the screen which means the initialization is finished. After initialization,
the set will quit factory mode automatically.
Factory
settings
D-mode(Design mode)
Enter D-Mode by pressing D-Mode ON/OFF key, and then you can enter the D-mode.
S-mode (Service mode)
Enter S-Mode by pressing VOLUME DOWN key on the unit until the volume decrease to minimum level, then press the DISPLAY key on the remote handset (don’t release the volume key) and you can enter S- mode.
After enter D-mode or S-mode, press OK, then press program up/down to select menu from menu 1 to menu 22, press OK to enter the menu, press program up/down to select item, press volume up/down to adjust the setting. Press D-mode again to quit factory mode.
You can also enter menu 1 to menu 19 directly by pressing digital button 1~9, 0, notebook, CAP, Display, Sleep, Calendar, System/INS, Favorite, Return, Picture.
Enter D-Mode by pressing D-Mode ON/OFF key, and then you can enter the D-mode.
S-mode (Service mode)
Enter S-Mode by pressing VOLUME DOWN key on the unit until the volume decrease to minimum level, then press the DISPLAY key on the remote handset (don’t release the volume key) and you can enter S- mode.
After enter D-mode or S-mode, press OK, then press program up/down to select menu from menu 1 to menu 22, press OK to enter the menu, press program up/down to select item, press volume up/down to adjust the setting. Press D-mode again to quit factory mode.
You can also enter menu 1 to menu 19 directly by pressing digital button 1~9, 0, notebook, CAP, Display, Sleep, Calendar, System/INS, Favorite, Return, Picture.
Circuit diagram [Click on the circuit diagram to magnify]
Adjustment
of B+ voltage
1) Apply 120VAC(±5V) to mains power input, and Philips standard testing pattern to RF input.
2) Adjust VR830 in STANDARD mode until voltage at TP2 (B+) is 108V ±0.5V
1) Apply 120VAC(±5V) to mains power input, and Philips standard testing pattern to RF input.
2) Adjust VR830 in STANDARD mode until voltage at TP2 (B+) is 108V ±0.5V
Screen
& Focus voltage adjustment1. Apply pattern
signal in normal status, enter D-mode, press “TV/AV” button to turn off the
vertical output.2. Adjust the
SCRREEN switch on the flyback transformer to make a horizontal shining line
just visible on the screen.3. Turn on the
vertical output, adjust the “FOCUS” on the flyback transformer to obtain the
optimum focus.
Adjustment
of Sub-brightness,1. Apply the
Grey-scale/Color bar (NTSC signal) to the AV input, in normal status.2. Select BRTC to
adjust the sub-brightness, until that the 2nd dark bar of 8 level Grey scale
just can be seen.
