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XR-P74OM, XR-P64OM, XR-P34OM
xR-P7 40, XR-P640,
XR-P34()
3. CASSETTE DECK SECTION
a Adjustment points and test points are shown in Fig. 3-2 and Fig. 3-4.
I
Mechanical Adjustment
a Set the TAPE function.
. Test tape: STD-301 (3kHz, 30min).
1 . Tape Speed Adjustment
No.
Mode
Test Tape
Adjusting
Points
Measurement
Points
Adjustment Procedure
Remarks
1
PLAY
sTD-301
(Playback:
3kHz)
DECK Unit
vR4111
TAPE TEST
POINT (Rch)
(AF CD Assy)
Press the PLAY SW and adjust so that the reading
becomes 3010Hza10Hz. Confirm that wow &
flutte! level is below 0.270 (in the reverse direction,
confirm that the reading is within 3010H2 t 60Hz).
!
Electrical Adjustment
Check the tollowing before starting.
1. Confirm that the tape speed adjustment has been
completed.
2. Clean the heads and demagnetize them using a head
eraser.
3. Set the measurement level to 0 dBV = I Vrms.
4. Use the specified tape for adjustment. Use the labeled
(A) side of the test tape.
STD-331E: For playback adjustment
STD-631: Normal blank tape
5. Provide yoursel{ with the foUowing measuring devides:
a AC millivoltmeter
o Low-frequency oscillator
a Attenuator
o Oscilloscope
6. Adjust both right and left channels
specified.
7. Tum the DOLBY NR switch off
specified.
8. Warm up the unit fgr several minutes before adjustment.
In particular, be sure to wartn up the unit in the
REC/PLAY
mode for 3 to 5 minutes before starting
recordingT/playback frequency characteristics adjust-
ment.
9. Always follon' the indicated adjustment order.
Otherwise, a complete adjustment may not be achieved.
Playback Adjustment (Decks I and ll)
1. Head Azimuth Adjustment
2. Playback Level Adjustment
Recording Adiustment (Deck ll)
1. Bias Oscillation Frequency Adjustment
2. Recording Level Adjustment.
3. RecordingT/playback Frequency Characteristics
Adjustment
4. ALC Operation Check
'As the reference recording level is 250nwb7/m Ior
STD-331E,
the recording level will be hfuher by 4 dB for
STD-3318
(160nwbz/m). When adjusting, pay carefull
attention to the type oI tape used.
unless otherwise
unless otherwize
3 ! 5 H .
6.3kHu
l O t H r
3 t 5 H r
12. 5
0 k H r SkHr 6.3
2lHz
t{0Hz
I 2 5 H r 53Ht /t0l'L
1 - 2 4
Fig. 3- 1 STD-331E Test Tape
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