PANASONIC CT-27SC15
Manual de Servicio

ELECTRICAL ADJUSTMENTS
2-6: VERTICAL POSITION (RF) 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. (Refer to Fig. 2-1) horizontal line 2-10: HORIZONTAL PHASE (RF) 1. Receive the center cross signal from the Pattern Generator. 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 (03) on the remote control to select �H.PHASE�. 4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and 2-11: LEVEL (RF) left becomes minimum.

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Notch

1. Connect the AC voltmeter to pin 6 of CP101. 2. Activate the adjustment mode display of Fig. 1-1 and press the channel button (35) on the remote control to select �LEVEL�. 3. Press the VOL. UP/DOWN button on the remote control until the AC voltmeter is 85 ± 2mV. 2-12: SEPARATION 1, 2 (RF, AV) 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=400Hz, R-ch=2KHz) 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 (36) on the remote control to select �SEPARATION1�. 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 �SEPARATION2� 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 (36) on the remote control to select �SEPARATION1�. 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 (37) on the remote control to select �SEPARATION2�. 9. Press the VOL. UP/DOWN button on the remote control to adjust it until the L-ch output becomes minimum. The output difference of the between with Filter and without Filter should be more than 25db for both L and R.

Shadow mask Fig. 2-1

2-7: VERTICAL SIZE (RF) 1. Receive the cross hatch signal from the Pattern Generator. 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%. 2-8: VERTICAL LINEARITY (RF) NOTE: Adjust after performing adjustments in section 2-7. 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, 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. LINERITY�. 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. 2-9: TRAPEZIUM (RF) 1. Receive the cross hatch signal from the Pattern Generator. 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 (34) on the remote control to select �TRAPEZIUM�. 4. Press the VOL. UP/DOWN button on the remote control until the both vertical lines of the screen become parallel.

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