Pioneer CT-70R Service Manual page 32

10.2 ELECTRICAL ADJUSTMENTS
Adjustment Conditions
1. Commence electrical adjustments only after
all mechanical adjustments have been com-
pleted.
2. Also make sure that the heads have been
cleaned and demagnetized.
3. Let the tape deck warm up for a few minutes
before commencing actual adjustments.
Assume signal level of OdBv=1Vrms.
Connect a 50kQ load resistance to the OUT-
PUT terminals (any resistance in the 47kQ
52kQ range is acceptable).
6. Set the control switches to the following
positions unless otherwise specified.
TIMER : OFF
MEMORY : OFF
DOLBY NR_- : OFF
MPX FILTER : OFF
MODE 7" 2 " display
ue
Test Tape
STD-331B* : For playback system adjustments
STD-608A : NORMAL blank tape
STD-603 : CrO, blank tape
STD-604 :METAL blank tape
* The recording levels for STD-331A and STD-
331B differ. Whereas the STD-331A reference
level is 333Hz, 250nwb/m, the corresponding
STD-331B level is 315Hz, 160nwb/m.
@ Reverse @ Forward
J
a as ory]
Screwdriver
Fig. 10-11 Head azimuth adjustment
Adjustment Sequence
Adjustments must always be made in the following
order.
1.
OO wb
aS
Head azimuth adjustment
Tape transport adjustment
Playback equalizer adjustment
Playback level adjustment
Erase current adjustment
Recording/playback frequency response adjust-
ment
Recording level adjustment
Level meter OdB check
Leader tape detector level adjustment
Check point
'
ig ee
Screwdriver
Fig. 10-12 Tape transport adjustment
OdB: 315Hz, 160nwhim
Fig. 10-13 STD-331B test tape