Read Sony ZS-D50 (serv.man2) Service Manual online
– 15 –
Record/Playback/Erase Head Azimuth Adjustment
Procedure :
1. Mode : FWD playback
1. Mode : FWD 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 1dB.
of output levels match together within 1dB.
3. Phase Check
Mode : FWD playback
4. Change the reverse playback mode and repeat the step 1 to 3.
5. After the adjustment, lock the adjustment screw with suitable
5. After the adjustment, lock the adjustment screw with suitable
locking compound.
Adjustment Location : – record/playback head –
set
LINE OUT
47k
Ω
level meter
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
L-CH
peak
peak
R-CH
peak
peak
L-CH
peak
peak
R-CH
peak
peak
Screw
position
position
output
level
level
within
1 dB
within
1 dB
screw position
V
H
in phase
90
°
45
°
135
°
180
°
good
wrong
set
L-CH
R-CH
screen pattern
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
Osilloscope
LINE OUT
47k
Ω
47k
Ω
Tape Speed Adjustment
Procedure :
– FWD Playback Mode –
1. Set to FWD playback mode.
2. Adjust RV691 so that the frequency counter reading becomes
2. Adjust RV691 so that the frequency counter reading becomes
3,000Hz.
Standar d v alue : 2,970 to 3,030Hz
3. Set to REV playback mode.
3. Set to REV playback mode.
Confirm the frequency should be within the standard value.
4. Confirm the frequency difference between beginning and the
end of tape should be within 1.5% (45Hz).
Adjustment Location : TC RF board
set
test tape
WS-48B
(3kHz, 0dB)
WS-48B
(3kHz, 0dB)
frequency counter
LINE OUT
47k
Ω
FWD side REV side
adjustment screw
Mechanism deck
RV691 :
Tape speed adjustment
Tape speed adjustment
TC RF board
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