Playback And Recording Section - Pioneer XV-EV500 Service Manual

1

6.1.2 PLAYBACK and RECORDING SECTION

A
7
Playback Section
(1) Tape Speed Confirmation
No. Mode Input Signal/Test Tape
1 PLAY NCT-111 (3 kHz)
(2) Head Azimuth Adjustment
¶ This unit is equipped with auto tape selector.
¶ Do not switch between forward and reverse operation with the screwdriver inserted.
B
No. Mode Input Signal/Test Tape
NCT-110
1 PLAY
(Playback: 10 kHz, –20 dB)
(3) Playback Level Adjustment
¶ Since this adjustment determines playback DolbyNR level, Perform it carefully.
C
No. Mode Input Signal/Test Tape
NCT-112 test tape
1 PLAY
(Playback: 315 Hz, 4 dB)
7
Recording Section
(1) Recording Bias Adjustment
¶ After the adjustment, caution should be exercised so as not to become under bias by checking the distortion rate.
D
No. Mode Input Signal/Test Tape
REC/ Input a 315Hz signal to the LINE -
1
IN terminal.
PAUSE
Load the STD–633 test tape and
REC =
2 record/playback the 315Hz and
PLAY
10kHz signals. (see the Note below)
Note: Set the 10kHz input signal level to the same value as the 315Hz input signal level of step 1.
E
(2) Recording Level Adjustment
No. Mode Input Signal/Test Tape
REC/ Input a 315Hz signal to the LINE-
1
PAUSE IN terminal.
REC =
STD–633 test tape and record/
2
playback the 315Hz signal.
PLAY
F
82
1
2
Adjustment Points
ADJ. VR on
CASSETTE MECHA
(Refer to Fig. 6-3)
Adjustment Points
Head azimuth
test tape
adjustment Screw
(Refer to Fig. 6-3)
Adjustment Points
VR2301
L ch
VR2302
R ch
Adjustment Points
∗ Input signal level
L ch
R ch
Adjustment Points
∗ Input signal level
L ch
R ch
XV-EV500
2
3
Measurement Points
P1 R (CN2507)
(IFAF ASSY)
Measurement Adjustment
Points
P3 L (CN2507)
Max. Playback
P1 R (CN2507)
signal level
(IFAF ASSY)
Adjustment
Measurement
Points
P3 L (CN2507)
P1 R (CN2507)
(IFAF ASSY)
Measurement
Points
P3 L (CN2507)
P1 R (CN2507)
VR2801
(IFAF ASSY)
VR2802
Measurement
Points
P3 L (CN2507)
P1 R (CN2507)
VR2401
(IFAF ASSY)
VR2402
3
4
Adjustment Value Remarks
FWD adjustment
+10
3000 Hz Hz
REV Confirmation
–10
( 3000 Hz
Remarks
Value
After adjustment, apply silicon
bond to the head azimuth
adjustment screw.
Remarks
Value
–3.7 dBV
Adjustment
Remarks
Value
–23.7 dBV
Repeat adjustment until playback level of
the 10kHz signal is within 0dBV
from that of the 315Hz signal.
Adjustment
Remarks
Value
–7.7 dBV
Repeat recording, playback and
adjustment until playback level of the
315Hz signal becomes –7.7dBV±0.5dB.
4
+40
Hz )
–40
±0.5dB