2. Turn the adjustment screw for the maximum output leTape Speed Adjustmentvels. If theseDECK A DECK B
levels do not match, turn the adjustment scruntil both of out-ew Procedure :
put levels match together within 1dB.Mode : Playback
test tape
WS-48B
frequency counter
(3kHz, � 0dB)
L-CH
peak
set+
�
outputwithinwithin
1 dB1 dB
level
R-CHOutput level measurement point
peak(see page 9)
Screw
position
1. Set to FWD playback mode.
2. Adjust RV380 so that the frequency counter reading becomes 3,000
? 15Hz.
screw position
L-CHR-CH
rFrequency difference between the begining and the end of the tape
peakpeak
should be within ? 3%.
rFrequency difference between deck A and deck B the bigining of
3. Mode : Playbackthe tape should be within 1.5%.
test tape
P-4-A100
Adjustment Location : MAIN board. (see page 11)
(10kHz, �10dB)oscilloscope
L-CH
Playback Level AdjustmentDECK A DECK B
Procedure :
L
VHMode : Playback
set
Rtest tape
P-4-L300level meter
(315Hz, 0dB)
R-CH
Output level measurement point
(see page 9)
+
set
screen pattern�
Output level measurement point
(see page 9)
in phase 45! 90! 135! 180!
goodwrongDeck A is RV301 (L-CH) and RV401 (R-CH), deck B is RV302 (L-
CH) and RV402 (R-CH) so that adjustment within adjustment level
4. Change the review playback mode and repeat the steas fps 1 to 3.ollows.
5. After the adjustment, lock the adjustment screw with suitable lock-
ing compound.Adjustment Level :
OUTPUT level : �7.2 to �8.2dB (� 301.5 to 338.3 mV)
Adjustment Location :level Difference between Channels : within 0.5dB
Comfrim the OUTPUT level does not change in playback mode while
changing the mode from playback to stop several times.
Adjustment Location : MAIN board. (see page 11)
Adjustment screws
REC/PB head (deck B)
or PB head (deck A)
� 10 � |
ACEC
SONY
