Teac Z-6000 - Page 20

20
MEASURING
POINT: RESULT
oe
for CHECK}
SETTING INPUT SIGNAL
R574/R674
R575/R675 Center pasition are
R576/R676 :
(Preparation)
BIAS(METAL | ¢.4 ¢ on MANUAL
R597/RG97 | OUTPUT: Max
tf peak fevel is not found, turn R576 or
R676 clockwise to locate peak, then
reset R576 or R676 to center
REC/PLAY
MANUAL CAL
TEST TONE OFF
15. Record bias MTT-5072 BIAS({METAL) Full CCW on MANUAL
(R111/R120) ‘ PCB
LINE IN: Over-bias value
6,3 kHz/-39 dB R597/R697 5 dB
(8.69
mV)
as
™ Over-bias value
REFERENCE R696/R696 2.5 aB
Ms Over-bias value
MTT-5081 RBS4/R694 2.5 dB
e ; Over-bias value
sereect R593/R693 is
MTT-801 R590/R690
LINE IN;
OUTPUT:
46. Record level MTT-5061 400 Hz/-9 dB R591/R691
.
:
(275
mV}
face
-5
dB
(436
mV}
MTT-5072 R592/R692
MTT-501 L503/L603 ey teach
LINE IN:
OUTPUT; :
17, Frequency ¥ 400 Hz & 16 kHz . If not, readjust
response mira S08) alternately /-39 dB L502/1.602 re froma a R594/R694
(8.69 mV)
MTT-5072 L507/L601 i lange
LINE IN:
MTT-5072 | 400 Hz/-9 dB Check
{275 mV} :
OUTPUT:
3.5% or less with NORMAL
2.0% or less with METAL, CrO,
18, Total harmonic
distortion
LINE IN:
OUTPUT:
. . i 400 Hz/-9 dB : F
19. Signal-to-noise | . NORMAL 45dBmin.
tatio MTT-5072 . ala hal Check cro, ABdBmin.
P METAL 48dBmin,
no signal
# Connection is same as in Fig. 6-6, but engage 1-kHz filter,
® Record a 1-kHz signal. Rewind tape to midpoint of recorded portion.
Record a “no signal’’ portion. Find the difference between the 1-kHz portion and
the “no signat”’ portion. ;
20. Erase efficiency
. LiNE IN:
1 kHz/+1 dB ra)
UTPUT:
MTT-5072 _ : ene Vv) Check 65 dB min. ratio
no signal
® Connection Fig. 6-6, but do not connect LINE IN (R), and engage 1-kHz filter.
Set the deck ta record mode. Find the difference between the 1-kHz recorded portion {L-ch)
and the “no-signal” portion (R-ch}. Then change the connection and check reverse operatian.
| 21, Channel,
saparation “TLE IN:
L-ch 1 kHz/-9 dB OUTPUT:
se a (275 mV} 35 dB min, ratio
R-ch No signal .
@ Connection: Fig. 6:6, but do not connect LINE IN ({L) and OUTPUT (L).
@ Record 8 125-Hz signal on R-ch and note output level. Invert tape and play R-ch track.
Check leakage level against the output reference of previously recorded portion.
22. Adjacent track
crosstalk —
_LINE IN:
L-ch No signal
R-ch 125 Hz/-9 dB
(275 mV} .
OUTPUT:
-45 dB min. ratio
MTT-5061