Teac W-760R - Erase Efficiency Measurement; REC MUTE Function Check; Channel Separation Test; Adjacent Track Crosstalk

. Erase
efficiency
ARS
Connection : Fig. 2-4
TAPE : MTT-5571
1kHz B.P.F in
LINE IN:
1kHz/+ 1dB
(870mV)
| W-760R
Ratio of the 1kHz
recorded portion to the
erased portion.
HIHABS CRABS OL
. REC MUTE
function
REC MUTE
sR
Connection : Fig. 2-4
TAPE : MTT-5571
kHz B.P.F in
LINE JIN:
1kHz/+ 1dB
(870mV)
Ratio of the 1kHz
recorded portion to the
“REC MUTE “portion.
SREB C* REC MUTE”
BAO Lk.
. Channel
seperation
FeUAlb
tiNy-Yyay
Connection : Fig. 2-4
TAPE : MTT-5562
1kHz B.P.F in
LINE IN :
Leh 1kHz/— 9dB
(275mV)
Rch No signal
RES
Ratio of Leh (1kHz) to
Reh (no signal).
Loh(1kHz) & Roh HES)
Okt
. Adjacent
track
crosstalk
bow fil
JOAK-F
Connection : Fig. 2-4
TAPE : MTT-5571
LINE IN:
Lch No signal
ES
Rech 125Hz/-9dB
(275mV)
Frequency Counter
MAIN PCB
Fig. 2-9 Test setup for bias OSC adjustment
Invert tape and play Rech
track. Check leckage
level against the output
reference of previously
recorded portion.
>-JSeRe.CBELE
PFO Roh HAL AILO LE
DC voltmeter
MAIN PCB
tb 4b
C125 C225
Fig. 2-10 Test setup for step up coil adjustment