Tape Recorder; Tape Speed Adjustment - Sony CFD-50 Service Manual

5-1. TAPE RECORDER SECTION
@ Test Tape
| Type | Signal =| Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
P-4-A063 6.3kHz, — 10 dB | head azimuth adjustment
REC/PB Head Azimuth Adjustment
Procedure:
1. Mode: playback
test tape
P-4-A063
(6.3kHz,
— 10dB)
PHONES jack
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 3 dB.
L-CH | ~
peak within
Output Zan i within
level 3d8
! }
!
I
|
R-CH
screw peak aie
osition positi L-CH R-CH —* angle
peak peak
3. Phase Check
Mode: playback
test tape
P.4-A063
oscilloscope
(6.3kHiz, :
— 10d8)
320
PHONES jack ®C4
Screen pattern
O@®
QO
135° 180°
es
wrong
in phase 45° 90°
oceennmennteenmmeenen ammamenmemeeemenamnenendtl
good
Adjustment Location:
adjustment screw
| CFD-50
Tape Speed Adjustment
Procedure:
Mode: playback
speed checker
LFM-30
or
digital frequency
test tape counter
WS-48A
(3kHz, OdB)
PHONES jack
Adjustment Value:
Speed checker Digital frequency counter
— 2.5 to +1.0% 2,925 — 3,030 Hz
Frequency difference between the beginning and the end of the tape
should be within 1% (30 Hz).
Adjustment Location:
O
adjustment resistor