Tape Path System Check - Sony DSR-300 Service Manual

5-3. TAPE PATH SYSTEM CHECK

If any setting in Section 5-3-1 and 5-3-2 does not
meet the specification, perform adjustments after
Section 5-4.
5-3-1. Check of Alignment Tape
Playback
Equipment and Tool
. Alignment tape (XH2-1AST)
. RF extension tool
. Oscilloscope
Setting
1. Connect the RF extension tool to CN775 of RP-
91 board.
2. Connect the oscilloscope as follows.
CH1: RF/RF extension tool (RF waveform)
CH2: JSW/RF extension tool (Switching
waveform)
Trigger: CH2
3. Select maintenance menu No. 604-10, center ITI
mode for tracking adjustment. (Refer to Section
5-2.)
4. Insert an alignment tape into the unit.
Checking Method
1. Set the PLAY mode.
2. Check that there are no large curls on the TG-1
upper flange, TG-2 lower flange, TG-3 upper
flange, TG-5 upper flange, TG-7 upper flange
and TG-8 upper flange. (Refer to Section 5-1-6.
Tape Path State.)
3. Check that both the RF waveform at both the
entrance and exit is flat on the oscilloscope.
5-6
<RF waveform>
Entrance Exit
A Normal
B Abnormal at
entrance
C Abnormal at
exit
DSR-300/P(E)/V1