Read Sony CFS-KW77S Service Manual online
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3. Phase Check
Mode: FWD/REV playback (DECK A)
FWD playback (DECK B)
4. Set in the REV mode and repeat the step 1 to 3.
5. After the adjustment, lock the screws with locking compound.
5. After the adjustment, lock the screws with locking compound.
Adjustment Location:
Tape Speed Adjustment
Procedure:
Mode: FWD/REV playback (DECK A)
Mode: FWD/REV playback (DECK A)
FWD playback (DECK B)
1. Make sure that the value indicated on the frequency counter
falls into the specification.
2. If out of specification, adjust RV302 so that the value on the
frequency counter becomes 3 kHz.
Adjustment Values:
Adjust so that the frequency at the beginning and that at the end
of tape winding are between 2,970 and 3,030 Hz.
of tape winding are between 2,970 and 3,030 Hz.
Note:
(High speed: non Adjustment)
Adjustment Location: MAIN board (See page 12.)
DECK-B
DECK-A
Frequency counter
2,910 to 3,090 Hz
+
–
–
V
H
+
–
Screen pattern
Good
Wrong
in phase 45
°
90
°
135
°
180
°
L-CH
R-CH
set
32
Ω
32
Ω
oscilloscope
PHONES jack (J301)
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
+
–
set
32
Ω
frequency
counter
counter
PHONES jack (J301)
test tape
WS-48B
(3kHz, 0 dB)
WS-48B
(3kHz, 0 dB)
FWD
REV
DECK A
DECK B
screw driver
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