67
XR-VS90SW, XR-VS90, XR-VS70SW, XR-VS70
Playback Adjustment
(1) Head Azimuth Adjustment
• Do not switch between forward and reverse operation with the screwdriver inserted.
Deck
ΙΙ
Step
Mode
Input Signal/
Test Tape
Adjusting Points
Measurement
Points
Adjustment
Value
Remarks
1
PLAY
STD-331E test tape
(Playback: 10kHz,
–20dB)
Deck
Ι
Head azimuth
adjustment
screw (Fig. 7)
TAPE TEST
POINT (L, Rch)
(AF Assy)
Max. playback
signal level
After adjustment, apply silicon bond to
the head azimuth adjustment screw.
(2) Playback Level Adjustment
• Since this adjustment determines playback dolby NR level, perform it carefully.
Deck
ΙΙ
Step
Mode
Input Signal/
Test Tape
Adjusting Points
Measurement
Points
Adjustment
Value
Remarks
1
PLAY
STD-331E test tape
(Playback: 315Hz, 0dB)
Deck
Ι
VR2303 (L ch)
VR2304 (R ch)
VR2305 (L ch)
VR2306 (R ch)
TAPE TEST
POINT (L, Rch)
(AF Assy)
– 3.7dBV
0 dB
–20
dB
30s
0 dB: 315 Hz, 250 nwb/m
315Hz
6.3kHz
10kHz
315Hz
14kHz
12.5
kHz
6.3
kHz
500
Hz
250
Hz
125
Hz
10kHz 8kHz
4kHz 2kHz
63Hz 40Hz
1kHz
30s 30s 30s 10s 10s ......................................................................................................... 10s
Fig. 6 STD-331E Test Tape
Fig. 7 Head Azimuth Adjustment Screw
Fig. 8 Frequency Characteristics
PLAYBACK
250
10k
12.5k
3dB
3dB 4dB
REV Azimuth Adjustment Screw
FWD Azimuth Adjustment Screw
RECORDING
250
10k
12.5k
3dB
3dB 5dB