Panasonic TX-21GV1, Руководство по обслуживанию

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LINEARITY ADJUSTMENT
S/W PULSE TEST PIN PATH ADJ. JIG
TEST POINTS
ENVELOPE TEST PIN PATH ADJ. JIG
MEASURING EQUIPMENT OSCILLOSCOPE
VR CONTROL PATH ADJ. JIG
ADJUSTMENT
S/T GUIDE ROLLER TAPE TRANSPORTING SYSTEM
1) Connect the PATH ADJ. JIG to PTO1 of the MAIN CIRCUIT BOARD.
2) Play back the ALIGNMENT TAPE (COLOUR BAR SIGNAL).
3) Connect the channel-1 scope probe to the S/W PULSE TEST PIN of the PATH ADJ. JIG.
4) Connect the channel-2 scope probe to the ENVELOPE TEST PIN of the PATH ADJ. JIG.
5) Adjust the VR CONTROL of the PATH ADJ. JIG for maximum envelope signal output of the alignment tape.
6) Adjust the S/T GUIDE ROLLER until the envelope signal waveforms of the entrance and exit sides are as shown fig.48.
30
Linearity adjustment
Fig.48.
a: Max output of envelope
b: Min output of envelope