Read Sony HST-SE581 / SEN-R4820 / SEN-T481 Service Manual online
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3.
Mode: Playback (FWD)
4.
Repeat steps 1 to 3 in playback (REV) mode.
5.
After the adjustments, apply suitable locking compound to the
pats adjusted.
pats adjusted.
Adjustment Location: Record/Playback Head (Deck A and B).
Playback level Adjustment
DECK A
DECK B
Procedure:
Mode: Playback (FWD)
Mode: Playback (FWD)
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:
(L-CH) and RV401 (R-CH) so that adjustment within adjustment
level as follows.
Adjustment Level:
VIDEO1 AUDIO OUT PB level: 301.5 to 338.3 mV (–8.2 to
–7.2 dB) level difference between the channels: within
–7.2 dB) level difference between the channels: within
±
0.5
dB
Adjustment Location: AUDIO board
set
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
oscilloscope
L
R
V
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
rear panel
VIDEO1
AUDIO OUT connector
AUDIO OUT connector
H
+
–
–
level meter
set
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
rear panel
VIDEO1
AUDIO OUT connector
(L: L-CH)
(R: R-CH)
AUDIO OUT connector
(L: L-CH)
(R: R-CH)
Tape Speed Adjustment
DECK A
Note: Start the Tape Speed adjustment as below after setting to the
test mode.
Procedure:
Mode: Playback (FWD)
Mode: Playback (FWD)
1.
Insert the WS-48B into the deck A and the blank tape into the
deck B.
deck B.
2.
Press the REC button and
· button on the deck B. Then
the deck B is at recording mode.
3.
Set the deck A to playback mode.
4.
Press the DUBBING SPEED HIGH button in playback mode.
Then at high speed mode.
Then at high speed mode.
5.
Adjust RV652 on the AUDIO board do that frequency counter
reads 6,000
reads 6,000
±
180 Hz.
6.
Press the DUBBING SPEED NORMAL button in playback
mode.
Then at normal speed mode.
mode.
Then at normal speed mode.
7.
Adjust RV651 on the AUDIO board so that frequency counter
reads 3,000
reads 3,000
±
90 Hz.
8.
Frequency difference between deck A and deck B the beginning
of the tape should be within
of the tape should be within
±
1.5 %.
Adjustment Location: AUDIO board
Sample Value of Wow and flutter
W.RMS (JIS) within 0.3%
(test tape: WS-48B)
(test tape: WS-48B)
+
–
–
set
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
frequency counter
rear panel
VIDEO1
AUDIO OUT connector
(L: L-CH)
(R: R-CH)
AUDIO OUT connector
(L: L-CH)
(R: R-CH)
Fowerd
side
Reverse
side
Adjustment screws
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