JVC AV20F704
Manual de Servicio

AV-20F704

2-7: VERTICAL POSITION 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Adjust the VR401 until the horizontal line becomes fit to the notch of the shadow mask. 2-8: VERTICAL SIZE 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (07) on the remote control to select �V. SIZE�. 4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes 9 ± 2%. 2-9: VERTICAL LINEARITY NOTE: Adjust after performing adjustments in section 2-8. After the adjustment of Vertical Linearity, reconfirm the Vertical Position and Vertical Size adjustments. 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (08) on the remote control to select �V. LIN�. 4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum. 2-10: OSD HORIZONTAL 1. Activate the adjustment mode display of Fig. 1-1. 2. Press the VOL. UP/DOWN button on the remote control until the difference of A and B becomes minimum. (Refer to Fig. 2-1)

2-11: SEPARATION 1, 2 Please do the method (1) or method (2) adjustment. Method (1) 1. Set the multi-sound signal generator for each different Lch and R-ch frequency (Ex. L-ch=2KHz, R-ch=400Hz) and receive the RF. 2. Connect the oscilloscope to the Audio Out Jack. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (34) on the remote control to select �SEP1�. 4. Press the VOL. UP/DOWN button on the remote control to adjust it until the audio output wave becomes a fine sine wave. 5. Press the CH UP button once the set to �SEP 2� mode. Then perform the above adjustment 4. Method (2) 1. Set the multi-sound signal generator L-ch=1KHz, R-ch=Non input and receive the RF. 2. Connect the oscilloscope to the Audio Out Jack (R-ch). 3. Press the AUDIO SELECT button on the remote control to set to the stereo mode. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (34) on the remote control to select �SEP 1�. 5. Press the VOL. UP/DOWN button on the remote control to adjust it until the R-ch output becomes minimum. 6. Set the multi-sound signal generator L-ch=Non input, R-ch=1KHz and receive the RF. 7. Connect the oscilloscope to the Audio Out Jack (L-ch). 8. Activate the adjustment mode display of Fig. 1-1 and press the channel button (35) on the remote control to select �SEP 2�. 9. Press the VOL. UP/DOWN button on the remote control to adjust it until the L-ch output becomes minimum. 2-12: BRIGHT CENTER 1. Receive the monoscope pattern. (RF Input) 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (16) on the remote control to select �BRI. CENT�. 4. Press the VOL. UP/DOWN button on the remote control until the white 15% is starting to be visible. 5. Receive the monoscope pattern. (Audio Video Input) 6. Press the TV/VCR button on the remote control to set to the AV mode. Then perform the above adjustments 2~4. 7. Press the TV/VCR button on the remote control to set to the CS mode. 8. Activate the adjustment mode display of Fig. 1-1 and press the channel button (16) on the remote control to select �BRI. CENT�. 9. Press the VOL. UP/DOWN button on the remote control to set the same step numbers as the AV.

TV

00 OSD A

35 B

Fig. 2-1

No. 52131

9