1-16
RC-BZ5LB/BZ5RD
RC-BZ6BU
Head azimuth
adjustment
Cassette amplifier section
Item
• Test tape:
VT702(8 kHz)
• Test output from:
Speaker terminal
(with 3
Ω
load)
1. Play back the test tape VT702 (8 kHz sig-
nal).
2. Adjust the azimuth adjusting screw so that
phase difference between R and L chan-
nels is minimum with the output level that
is the maximum level plug less than 2 dB
in the FWD and REV mode.
After the adjustment apply screw sealant
onto the azimuth adjusting screw for more
than half the screw head.
3. If the head azimuth is still maladjusted, re-
adjust it with the azimuth adjusting screw
alternately in the FWD and REV modes.
• Output: Max.
level plus less
than 2 dB
• Phase differ-
ence between
R & L ch:
Minimum
Azimuth adjusting
screw (after head
replacement only)
Tape speed,
Wow & flutter
check
• Function selector:
TAPE
• Test tape:
VT712 (3 kHz)
•Test output from:
Speaker terminal
(with 3
Ω
load)
1. Play back the end portion of the test tape
VT712 (3 kHz signal).
2. At that time check to see if the frequency
counter reads 2940 to 3090 Hz. If not,
adjust the semi-fixed resistor inside the
motor to obtain the specified frequency.
3. Wow and flutter must be 0.38 % or less
(unweighted).
Frequency:
2940-3090 Hz
0.38 % or less
(unweighted)
Tape speed (with
semi-fixed resistor
inside motor)
Playback
output check
• Function selector:
TAPE
• Test tape: VT722,
VT724 (1 kHz)
• Test output from:
Speaker terminal
(with 3
Ω
load)
1. With the test tape VT722 (1 kHz signal)
being played back, confirm that the speaker
output is 2.1 W or more with 10 % distor-
tion.
2. With the test tape VT724 being played
back, confirm that the deviation between
R-ch and L-ch outputs is less than 3 dB.
• Speaker output
with 10 %
distortion:
2.1W or more
• Deviation be-
tween R & L ch
outputs:
3 dB or less
Playback
frequency
response
check
• Function selector:
TAPE
• Test tape: VT738
• Test output from:
Speaker terminal
(with 3
Ω
load)
With the test tape VT738 being played back,
confirm that the deviation between 1 kHz and
125 Hz signals is 6 ± 3 dB and that between
the 1 kHz and 8 kHz signals is 0 ± 4 dB.
• Deviation
between 1 kHz
& 125 Hz:
6 ± 3 dB
• Deviation
between 1 kHz
& 8 kHz:
0 ± 4 dB
REC/PB
sensitivity
check
• Function selector:
TAPE
• Mode: Recording
• Test input to:
CN301
With the input of 1 kHz, –20 dBs signal to the
test point CN301, confirm that the level dif-
ference between the recording and playback
is 0 ± 3 dB or less.
• Level difference
between
REC & PB:
0 ± 3 dB or less
Conditions
Adjustment & Confirmation Method
Standard Value
Adjusting Point
www.freeservicemanuals.info
11/28/2017
Digitized in Heiloo Netherlands
