Sony DSR-300 Service Manual page 243

5-3-2. Check of self-recording tape
playback
Equipment and Tools
. RF extension tool
. Blanking tape
. 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. Insert the blanking tape into the unit.
4. Select maintenance menu No. 604-10, center ITI
mode for tracking adjustment. (Refer to Section
5-2.)
5. Set the REC mode, and record the center ITI
10 MHz single signal to the tape from the top for
three to ten seconds.
Checking Method
1. Set the PLAY mode, and playback the portion
recorded in the setting step 5.
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 Sections 5-1-5
and 5-1-6.)
3. Check that the RF waveform meets the
specification on the oscilloscope.
DSR-300/P(E)/V1
400 us
1350 us
140 us
70 us
C B D
(b) (c)
(d)
Specification
B > 0.65 A
C > 0.75 A
D > 0.8 A
E > 0.75 A
Overall max. value
Min. value between sections (b) : B
Min. value between sections (c) : C
Min. value between sections (d) : D (Excluding between sections (f))
Min. value between sections (e) : E
2400 us
700 us
60 us
E
(f)
(e)
: A
A
5-7