Sanyo SRT-8960P Service Manual page 10

Notes :
• Set the REC/PLAY SPEED button to indicator panel to the
8 H (8 hours) mode.
• Self-recoding means "Record any broadcasting or video
signal and play back the just-recorded portion".
2-1-3. SWITCHING POSITION ADJ.
Measuring Point Measuring Equipment Adj. Condition
TP101(VIDEO Oscilloscope
OUT terminal)
TP183 (SW-P)
Adj. Condition
REC button, TRACKING
buttons, EJECT button
1. Play back the alignment tape. Press the TRACKING buttons
(+) and (–) simultaneously. (TRACKING center position)
2. Press the REC button three times within 10 seconds after
the display is shown. All three presses must be carried out
within 3 seconds. For the third time, press the REC button
more than 0.5 seconds as shown in Fig. 2-1-2.
3. The automatic adjustment mode is set, the numerals of
Indicator display "P 0 : 00" changes automatically and the
unit stops at the point the adjustment value becomes
approx. 6.5 H.
4. In the same adjustment mode, trigger at the edge of the
RF SW pulse, and check that the front edge of the V sync
signal from the fall edge of the RF SW pulse is delayed by
6.5 H ± 0.5 H as shown in Fig. 2-1-3. If it is not 6.5 H ± 0.5
H, manually perform fine adjustments for the TRACKING
buttons (+) or (–) to satisfy the specification.
5. After completing adjustments, press the EJECT button (more
than 1 second) and check the Indicator shows "P – –" at
this time.
Note : Repeat steps 1 to 4 if the adjustment takes more then
20 seconds.
REC button
Start of play
back display
ON
OFF
within within
3
10 sec. 2 sec.
T=6.5H 0.5H
1H
Fall
PLAY (8H) mode
Alignment tape
VHJ-0052
Adj. Condition
6.5 H ± 0.5 H
more
then
0.5 adjusting
sec. period 10 sec.
Fig. 2-1-2
0.5H
Front edge of
vertical sync signal
RF.SW.PULSE
Fig. 2-1-3
2-1-4. 24H PLAY TRACKING CONFIRM AND ADJ.
Measuring Point Measuring Equipment
Picture of Color bar generator
monitor TV (Monoscope pattern
signal)
Monitor TV
Adj. Location
TRACKING buttons
REC button
1. Insert blank VHS cassette tape and record monoscope pat-
tern on the 8H mode.
2. Play back the self-recorded tape and then set the VCR in
the 24H mode.
3. Use the front tracking adjustment button to fine-tune to the
optimum position so that the positions of noise on the moni-
tor screen at the tracking center are vertically symmetrical.
Then press the REC button more than 1 second to enter
this position as the new tracking center. Then the indication
changes to "P – : –" for approximately 1 second.
4. If vertical shaking occurs at the tracking center, read just by
pushing the TRACKING buttons (no more than 3 times),
then enter this new tracking position as the tracking center.
2-1-5. F. SLOW TRACKING CONFIRM AND ADJ.
Measuring Point Measuring Equipment
Picture of Color bar generator
monitor TV (Monoscope pattern
signal), Monitor TV
Adj. Location
REC button, TRACKING
buttons, EJECT button
1. Insert blank VHS cassette tape and record monoscope pat-
tern on the 8H mode.
2. Play back the self-recorded tape and then set the VCR in
the STILL mode.
3. Change to F. Slow play back mode by pressing REC button
3 times. These 3-push must be done within 3 seconds, and
last push must be kept pressed for 0.5 seconds.
4. Set the tracking control position to the center by pressing
TRACKING (+) and (–) buttons simultaneously, and con-
firm the absence of noise in the slow playback image on
the monitor screen at this centered tracking position. Start-
ing from this centered tracking position, push the (+) and
(–) buttons and confirm that no noise appears before the
fifth push in either direction.
If noise appears before the fifth push, fine-tune with the
front tracking adjustment button so that no noise appears
before the fifth push, then press the EJECT button to make
this point the new tracking center. (When pressing the
EJECT button to enter this new tracking center, the track-
ing should be displayed.)
The FLD counter readout changes to "P – –" for approxi-
mately 1 second in order to confirm that data has been
entered.
– 11 –
Adj. Condition
Self-recording
(8H) mode
24H PLAY mode
Blank tape
Adj. Value
Adj. Condition
Self-recording
(8H) mode, PLAY
mode, Blank tape
Adj. Value
–