Pioneer XC-IS21T Service Manual page 52

XC-IS21T
6.1.2 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.
No. Mode Input Signal/Test Tape
STD-331E test tape
1 PLAY
(Playback: 10 kHz, –20 dB)
(3) Playback Level Adjustment
¶ Since this adjustment determines playback DolbyNR level, Perform it carefully.
No. Mode Input Signal/Test Tape
STD-331E test tape
1 PLAY
(Playback: 315 Hz, 0 dB)
6.1.3 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.
No. Mode Input Signal/Test Tape
REC/ Input a 315Hz signal to the LINE -
1
PAUSE IN terminal.
Load the STD–632 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.
(2) Recording Level Adjustment
No. Mode Input Signal/Test Tape
REC/ Input a 315Hz signal to the LINE-
∗
1
PAUSE IN terminal.
REC =
STD–632 test tape and record/
2
playback the 315Hz signal.
PLAY
52
Adjustment Points
VR2701 (DECK ASSY)
(Refer to Fig. 6-3)
Adjustment Points
Head azimuth
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
Measurement Points
TP R (C2204)
(DECK ASSY)
Measurement Adjustment
Points
TP L (C2203)
Max. Playback
TP R (C2204)
(DECK ASSY)
Measurement Adjustment
Points
TP L (C2203)
TP R (C2204)
(DECK ASSY)
Measurement
Points
TP L (C2203)
TP R (C2204)
VR2801
(DECK ASSY)
VR2802
Measurement
Points
TP L (C2203)
TP R (C2204)
VR2401
(DECK ASSY)
VR2402
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
signal level
adjustment screw.
Remarks
Value
–3.7 dBV
Adjustment
Remarks
Value
–23.7 dBV
Repeat adjustment until playback level of
the 10kHz signal is within 0.5dBV ±0.5dB
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.
+60
Hz )
–60