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– 9 –
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Procedure:
1. Forward Playback Mode
1. Forward Playback Mode
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 1 dB.
of output levels match together within 1 dB.
3. Playback Mode
4. Change the reverse playback mode and repeat the steps 1 to 3.
5. After the adjustment, lock the adjustment screws with suitable
5. After the adjustment, lock the adjustment screws with suitable
locking compound.
Adjustment Location: –record/playback head–
–
+
set
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
level meter
LINE OUT
47 k
Ω
within
1 dB
1 dB
within
1 dB
1 dB
output
level
level
R-CH
peak
peak
R-CH
peak
peak
L-CH
peak
peak
L-CH
peak
peak
screw
position
position
screw position
–
+
–
+
V
H
Screen Pattern
set
In phase 45˚
90˚
135˚
180˚
good
wrong
47 k
Ω
47 k
Ω
L-CH
R-CH
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
LINE OUT
oscilloscope
forward side
reverse side
adjustment screws
Tape Speed Adjustment DECK A DECK B
Procedure:
–Forward Playback Mode–
–Forward Playback Mode–
(High speed adjustment)
1. Set to test mode. (Refer to page 8.)
2. Set to FWD playback mode.
3. Twice pressing the HIGH/NORMAL switch.
4. Adjust RV72 so that the frequency counter reading becomes
1. Set to test mode. (Refer to page 8.)
2. Set to FWD playback mode.
3. Twice pressing the HIGH/NORMAL switch.
4. Adjust RV72 so that the frequency counter reading becomes
6,000
±
20 Hz.
5. Release test mode after adjustment is completed.
(Normal speed adjustment)
1. Set to FWD playback mode.
2. Adjust RV71 so that the frequency counter reading becomes
(Normal speed adjustment)
1. Set to FWD playback mode.
2. Adjust RV71 so that the frequency counter reading becomes
3,000
±
10 Hz.
(Pitch control adjustment) (TC-WE725/WE825S only)
1. Push the PITCH CONTROL switch.
2. Set RV902 to mechanical center.
3. Set to FWD playback mode.
4. Adjust RV601 so that the frequency counter reading becomes
1. Push the PITCH CONTROL switch.
2. Set RV902 to mechanical center.
3. Set to FWD playback mode.
4. Adjust RV601 so that the frequency counter reading becomes
3,000
±
10 Hz.
Frequency difference between the beginning and the end of the tape
should be within
should be within
±
3%.
Frequency difference between the 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, MAIN board
(See page 11.)
(See page 11.)
Playback Level Adjustment DECK A DECK B
Procedure:
–Forward Playback Mode–
–Forward Playback Mode–
–
+
set
frequency counter
47 k
Ω
LINE OUT
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
Adjust RV11 (L-CH) and RV21 (R-CH) so the level meter reading
becomes the adjustment limits below.
becomes the adjustment limits below.
Adjustment Value:
LINE OUT level : –7.7
±
0.5 dB (0.301 to 0.338 V)
Level difference between channels : within 0.5 dB
Confirm that the LINE OUT level does not change in playback mode
while changing the mode from playback to stop several times.
while changing the mode from playback to stop several times.
Adjustment Location: AUDIO board (See page 11.)
–
+
set
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
level meter
LINE OUT
47 k
Ω
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