Adjustments, English; Adjustments After Replacement Of Main Chassis - Bang & Olufsen BeoVision 1 Guía De Servicio

2.20

Adjustments, English

#16 Adjustments after replacement of main chassis

Disconnect the ESD mat from the main chassis
Connect the mains voltage
Turn on the TV
Set settings for VTR
Adjust G2
Adjust FOCUS
Adjust geometry
- Remove the alligator clip from the aerial input on the main chassis.
- Turn on the TV, with GO. If the screen is black, adjust the 04R485 (SCREEN) to
obtain a picture on the screen. The 04R485 (SCREEN and FOCUS) is located at
the top of PCB4, just to the right of PCB3 seen from behind (see
- A VTR must be used for adjustment to take place.
- If the customer has a videotaperecorder (VTR), then this can be used. If not,
another VTR has to be used. If the customer does not have a VTR: Select OPTIONS
in SETUP. Select CONNECTIONS. Set V.TAPE to V.TAPE. Remember to set V.TAPE
to NONE, when adjustment of the TV is finished, (not if the customer's VTR has
been used).
- Enter SETUP, select SERVICEMODE with STOP, STOP, GO. Push the button
combination within 3 seconds. Select the MONITOR SERVICE MENU then
PICTURE ADJUSTMENTS. Select G2 ADJUSTMENT with GO. Then adjust G2 by
means of 04R485 (SCREEN) (see
write down error messages, if any. Press GO to exit servicemode.
- Connect the VTR to the BeoVision 1 in the V.TAPE plug using a scart cable.
Choose V.TAPE in display and press GO. Insert the test tape from the back-up
suitcase, and press GO. Now a test picture should be on the screen. If a non B&O
or an old B&O VTR is used, insert the test tape and press play on the VTR or the
VTR remote control. Adjust to optimum focus of the vertical lines as viewed
approx. 10 cm/4" from the edge of the screen, by means of 04R485 (FOCUS)
(see 22).
- Use the Test-tape as in FOCUS adjustment to check the geometry.
- Remember to check the geometry in format 2 (16:9) as well. Enter SETUP and
select PICTURE FORMAT. Select FORMAT 16:9 with GO. The geometry of
BeoVision 1 rarely requires adjustment after replacement of main chassis but if so,
the parameters in the following sections can be adjusted.
These parameters are fixed and should not be adjusted:
- Vertical Slope (V-SL)
- Vertical S-Correction (V-SC)
- Horizontal sensitivity (EHT)
22). When G2 displays OK, press GO and
Must always be set to 25.
Must always be set to 20.
Must always be set to 38.
22).