Teac V-870 - Playback Performance

tapes ;
For Dotby level cafibration
For playback frequency response check for NORMAL
For playback frequency response check for HETAL and Crde
For S/N check for NORMAL
ADJUST
(or CHECK)
Ee brgitsiag
Check
Azimuth screws
of R»P head
Be HAY EO
PIUVARBAY
(Fig. 5-4)
Ri2 / R22
R13 / R23
MEASURING POINT,
RESULT
WET + ABA
OUTPUT ¢L/R}
Phase : Within 45°
fg 45° LAA
OUTPUT {L/R} :
Phase between L-ch and
R-ch =: 0°
Maximumx output at L &
R-ch's.
L-R BIORBEA 0° TC
Boe ch hieAWA
REHARKS
fi 4
OUTPUT {L/R}
~§ dB ( 436 mV )
PEAK LEVEL meter (L/R)
0 dB (RED) lit
008 GR) RAT
Rit / R21
OUTPUT (L/R)
Nealy equal,
and 10 kHz
318 Hz & 10 KHZ OLN IEEE <
GOED RB
Standerd #8
output level ‘at 351 Hz
> Fig. §-8
Check
5-3. PLAYBACK PERFORMANCE
F3-4E FR
TEAC test
Deck settings HTT-150
Hode PLAY HIT-256
NR SYSTEM sw. OUT HIT-356
MPX FILTER sw. OUT MTT-5511
ITE SETTING INPUT SIGNAL
BIR mE AEA
MTT-159
1, REC + PLAY
head azimuth a eee
&+ BAYER Connect ion Fig. 5-3
PIUVA HTT-256 or MIT~356
{ 10 ktlz ) ;
. Playback ;
output level Same as above fal HTT-150
BERAVAIY
. Meter level
setting : a ;
L- 4 VAY Connection Fig. 5-1 MTT~150
eyb
. Playback
frequency ta Re MTT-256
response Connect lon Fig. 5-1 {HTT-356)
Fe aE
MIT-5517 ;
fully demagnetize
. Playback (i
8/N ratio Connect ion Fig. 5-1 petra tape
Be S/N it
(AULT + Ht CH
SHANK GO)
REC Head P/8B Head
BEN» KF BtkAv F
REC Head Azimuth Screw Height Adj. Screw
REC TU V AMERY Bde
P/B Head Tilt Adj. Screw
Azimuth Screw FI b Rae
P/BT VV AWAY
Fig. 5-4
(aby
+4
+2
°
-2
-4
63 9 IGwCHzb
Fig, 5-6 Playback frequency response
Fa AR IE
O°tin phase} 45°
age =I
POOR
OUTPUT (L/R)
S/N 450B min.
-5 dB ( 436 m¥ ) is reference level
BMV AILI£ 5 dB ( 436 mv )
180° (out of phase}
“Wa
90° 135°
Fig. 5-5 Confirming phase relationship
act
11