– 7 –
2. Turn the adjustment screw for the maximum output levels. If
these levels do not match,turn the adjustment screw until both of
output levels match together within 1dB.
L-CH
peak
R-CH
peak
L-CH
peak
R-CH
peak
Screw
position
output
level
within
1 dB
within
1 dB
screw angle
3. Playback Mode
test tape
P-4-A100
(10kHz, –10dB)
V
H
in phase 45
°
90
°
135
°
180
°
good
wrong
set
L-CH
R-CH
screen pattern
L
R
Output level measurement point
(see page 6 )
4. Change the review playback mode and repeat the steps 1 to 3.
5. After the adjustment, lock the adjustment screw with suitable
locking compound.
Adjustment Location :
– record/playback head (Deck A and B) –
test tape
WS-48B
(3kHz, 0dB)
+
–
set
frequency counter
Output level measurement point
(see page 6 )
Speed
Deck
Adjustment
Frequency counter
*High
A
RV652
5,970 to 6,030Hz
B
RV652
Normal
A
RV651
2,940 to 3,090Hz
B
RV651
test tape
P-4-L300
(315Hz, 0dB)
Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-
CH) and RV401 (R-CH) so that adjustment within adjustment level as
follows.
Adjustment Level :
LINE OUT level : – 3.5
±
2.0dB (0.41 to 0.65V)
Level Difference between Channels : within 0.5dB
Confirm the OUTPUT level does not change in playback mode while
changing the mode from playback to stop several times.
Adjustment Location : AUDIO board.
(see page 8)
set
VTVM
+
–
Output level measurement point
(see page 6 )
Tape Speed Adjustment
DECK A DECK B
Procedure :
r
Perform high speed adjustment before normal speed adjustment.
Mode : Playback
* Continue to press HIGH SPEED DUBBING switch (S266) in
playback mode : High speed playback.
Frequency difference between the begining and the end of the tape
should be within
±
3%.
Frequency difference between deck A and deck B the bigining of
the tape should be within 1.5%.
Adjustment Location : AUDIO board.
(see page 8)
Playback Level Adjustment
DECK A DECK B
Procedure :
–FWD Playback Mode–
Fowerd
side
Reverse
side
Adjustment screws
Oscilloscope
