Check After Adjustment - Sony DSR-300 Service Manual

5-7. CHECK AFTER ADJUSTMENT

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.
5. Perform checks after Section 5-7-1.
5-7-1. Tracking Check
1. Set the FWD search/REV search mode,
assuming that the output level of the RF
waveform is A (= 100 %).
2. Set the PLAY mode, assuming that the RF
waveform output level is B (= 65 %).
3. Check that the A and B levels are Specification 1.
4. Check to see that the difference in the amplitude
between Emax and Emin in the FWD mode is
less than 17 % of the amplitude (A = 100 %) in
the FWD/REV search mode. (Specification 2)
5. Check to see that no significant fluctuations are
observed in the waveform. (Specification 3)
DSR-300/P(E)/V1
Specification 1
B
= 0.65
A
FWD search or REV search
FWD mode
Specification 2
(Emax _ Emin) < 17 % or (
Specification 3
1
C < A
15
B A
A = 100 %
Emin Emax
2.5
A)
15
C
A
C
5-13