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LINEARITY ADJUSTMENT
TEST POINTS
MEASURING EQUIPMENT
ADJUSTMENT
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.
S/W PULSE TEST PIN
ENVELOPE TEST PIN
OSCILLOSCOPE
VR CONTROL
S/T GUIDE ROLLER
a: Max output of envelope
b: Min output of envelope
Linearity adjustment
Fig.48.
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PATH ADJ. JIG
PATH ADJ. JIG
PATH ADJ. JIG
TAPE TRANSPORTING SYSTEM
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