Read Sony TC-TX5 Service Manual online
– 5 –
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode : REV playback
1. Mode : REV playback
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.
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
output
level
level
L-CH peak
R-CH peak
within
1dB
1dB
angle
R-CH
peak
peak
3. Phase Check
Mode : playback
+
–
–
V
H
+
–
Screen pattern
Good
Wrong
in phase 45
°
90
°
135
°
180
°
LINE OUT
set
R-CH
L-CH
47 k
Ω
47 k
Ω
oscilloscope
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
+
–
–
set
47 k
Ω
LINE OUT
level meter
Test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
4. Set in the FWD mode and repeat the step 1 to 3.
5. After the adjustment, lock the screw with locking compound.
5. After the adjustment, lock the screw with locking compound.
Adjustment Location: Record/Playback head
FWD side
REV side
Adjustment screw
Tape Speed Adjustment
Procedure:
Mode: FWD playback
Mode: FWD playback
+
–
–
set
LINE OUT
frequency counter
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
47 k
Ω
1. Set to FWD playback mode.
2. Adjust RV801 so that the frequency counter reading becomes
2. Adjust RV801 so that the frequency counter reading becomes
2,980 ± 30 Hz.
3. Confirm that the deviation between tape top and tape end is within
3%.
Playback Level Adjustment
Procedure:
Mode: FWD playback
Mode: FWD playback
Adjust RV151 (L-CH) and RV251 (R-CH) so that the reading on
level meter meets the adjustment limits below.
level meter meets the adjustment limits below.
Adjustment Limits:
LINE OUT level: –4.7±0.5 dB (0.43 to 0.48 V)
Level difference between channels: within 2 dB
Level difference between channels: within 2 dB
Check that the LINE OUT level does not change even if Playback
and Stop operation is repeated several times.
and Stop operation is repeated several times.
Adjustment Location: DECK board
Adjustment Location:
[DECK BOARD] (Component side)
+
–
–
set
LINE OUT
47 k
Ω
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
level meter
IC305
CN352
T351
RV252
Record BIAS(R-CH)
RV152
Record BIAS(L-CH)
RV251
Playback Level(R-CH)
RV151
Playback Level(L-CH)
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