Pioneer RX-P840 Service Manual page 15

RX-P840
e Adjustment points and test points are shown in Fig. 3—2 and Fig. 3—4.
@@ Mechanical Adjustment
®@ Set the TAPE function.
®@ Test tape: STD—301 (3kHz, 30min).
1. Tape Speed Adjustment
STD-301
PLAY (Playback:
3kHz)
Adjustment Procedure 3
Press the PLAY SW and adjust so that the reading
becomes 3010Hz+10Hz. Confirm that wow &
flutter level is below 0.2% (in the reverse direction,
confirm that the reading is within 3010Hz=+ 60Hz).
TAPE TEST
POINT (Rch)
(MAIN Assy)
DECK Unit
VR4111
Electrical Adjustment
Playback Adjustment (Decks | and Il)
completed.
2. Clean the heads and demagnetize them using a head
Check the following before starting.
Recording Adjustment (Deck II)
8. Warm up the unit for several minutes before adjustment.
In particular, be sure to warm up the unit in the
REC/PLAY mode for 3 to 5 minutes before starting
recording/playback frequency characteristics
adjustment.
. Always follow the indicated adjustment order.
Otherwise, a complete adjustment may not be achieved.
wo
O¢dB 30s
OdB : 315Hz, 250nwb/m
30s 30s 30s
Fig. 3-1 STD—331E Test Tape
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