Tape Deck Section - Sony XR-CA300 Service Manual

XR-CA300/CA320/CA320X

TAPE DECK SECTION

1. The adjustments should be performed in the order given in
this service manual.
2. The adjustments should be performed for both L-CH and
R-CH.
Test Tape
Type Signal
P-4-A063 6.3 kHz, –10 dB
WS-48A 3 kHz, 0 dB
PB Head Azimuth Adjustment
Procedure:
1. Put the set into the FWD PB mode.
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
speaker out terminal
2. Turn the screw and check the output peak value. Adjust the
screw so that the peak value in channels L and R coincides
within 3 dB.
L-CH
peak
output
level
R-CH
peak
screw
position
3. Check the phase in the FWD PB mode.
test tape
P-4-A063
(6.3 kHz, –10 dB)
4 Ω
L-CH
set
4 Ω
R-CH
speaker out terminal
Screen pattern
45 °
in phase
good
4. Repeat the above adjustment for the REV PB mode.
5. Check that output level difference between FWD PB mode
and REV PB mode is within 4 dB.
14
0 dB= 0.775 V
Used for
head azimuth adjustment
tape speed adjustment
level
meter
4 Ω
+
–
within
3 dB
within
3 dB
angle
L-CH R-CH
peak
peak
oscilloscope
V H
+ +
– –
90 ° 135 ° 180 °
wrong
Adjustment Location: PB head
Tape Speed Adjustment
Setting:
test tape
WS-48A
(3 kHz, 0 dB)
set
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the
reading on the frequency counter becomes in 3,015 Hz.
Specified Value: 2,940 to 3,090 Hz
Adjustment Location: See page 17.

FWD

 adjustment
 screws

REV
frequency counter
4 Ω
+
–
speaker out terminal