Panasonic TX-21AV1C, Service Manual, Page: 7 / 54

6
ALIGNMENT INSTRUCTIONS
6-5. HORIZONTAL CENTER
1) Apply a RETMA PATTERN SINGNAL.
2) Adjust picture centering with H-/- KEY.
7. DECK ADJUSTMENT
7-1. X-POSITION AND P2,P3 ADJUSTMENT
1) Adjust point : X-POSITION
Checking point : oscilloscope ch1 = H/SW (PY03 #2)
oscilloscope ch2 = PB ENVE (PY03 #4)
Triggering : CH1
Measuring Equipment : oscilloscope, path jig
Mode : PLAYBACK, ATK OFF
Test tape : DP-2 (6KHz)
* Adjustment Procedure
1) Connect the PATH JIG to PY03 after Test tape PLAYBACK
2) Insert the DP-2 TAPE. ( Auto playback )
3) Pressing the “ATK OFF” KEY.
4) Adjust the waveform of PB ENVE to maximum(figure1) using X-position VR.
5) Adjust IN/OUTPUT GUIDE until the exact waveform appear as bellow figure2.