AKAI TV2835
Manual de Servicio

Additional service mode settinas: Select the following service mode setting points with the HA I vcc buttons Format Vertical Amplitude Vertical Position S-Correction Adjust viewing screen format Adjust vertical image height Adjust vertical image position Adjust vertical linearity

NVM addr. Press the b*yellowcc button on the remote control to select the various setting positions of the NVM address and the NVM data and press the volume buttons to ~,d / ,(( change them. Each change of address must be stored separately by pressing the button,, OK ((. Attention: Changing other addresses may cause fault in the set. New initialisation: New initialisation of the channel positions: This function enables you to delete all the basic settings of the operating functions. Call up service mode and select the parameter �NVM addr.�. The NVM data (def. value 72) of the NVM address �0001� can now be changed to any value at all. Then store by pressing the button pi OK (( and exit the service mode by pressing the button )) TV <(. Switch the set off via the mains switch and restart. G2 balancing: After an operating time of approx. 30 min. actuate the G2 controller to set the cathode with the largest value (measured) in such a way that the measured value only just changes from a single digit numerical value to a two digit value. I

Vertical Symmetry Set vertical symmetry (S-Correction and Vertical Symmetry must be _ optimised either way) Horizontal Pos. RGB Adjust horizontal image orientation of a RGB source Horizontal Position Adjust horizontal image position

Horizontal Amplitude Adjust image width Cushion Trapeze Corner Compensate E/W-negative distortion Set the vertical lines of the test pattern parallel to each other Adjust vertical lines in the corners

Horizontal Svmmetry Set horizontal symmetry Blanking Phase Left Adjust the scanning of the horizontal rewind (left) (def. value 340) Blankina Phase Fiiaht Adjust the scanning of the horizontal rewind (right) (def. value 250) Chroma Delay Register Chroma-Signal with Luma-Signal Luma Delay Register Luma-Signal with ChromaSignal. Note: Only one parameter (Chroma or Luma Delay) needs to be balanced. Additional option for changing the horizontal image orientation. When balancing this parameter set odd numerical values only. (Def. value 61) DVCO The auxiliary colour carrier frequency automatically adjusts to its reference value see G2 adjustment see black-white adjustment see black-white adjustment

Setting the focus: Feed in appropriate test picture. Set brightness, colour saturation and contrast to nominal value according to your estimation. Press INFO button once (menu appears). Set picture to an optimal general definition with the focus adjuster (top adjuster of the line output transformer).
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Newline

Cutoff/White

Drive (black-white balance):

Cut-off: Set the three cutoff values so that the darker grey areas turn achromatic. The basic values of the cutoff setting points are 40. Leave the value of the cathode with the middle controlled value as it is, set the two other cathodes. White Drive: The basic values of the White Drive setting points are 120. If the picture seems too ,,cold� reduce the White Drive Blue setting point. If the picture seems too ,,warm� turn the White Drive Red setting point back.

G2 cutoff White Drive

Vet-t. Pos OSD Adjust vertical OSD position. Hor. Pos OSD Adjust horizontal OSD position. Vert. Pos OSD (NTSC) Hor. Pos OSD (NTSC) Vert. Pos VT Hor. Pas VT Adjust vertical OSD position in NTSC-playback mode. Adjust horizontal OSD position in NTSC-playback mode.

Adjust vertical position of teletext. Adjust horizontal position of teletext.