Teac V-909RX - Page 18

V-909RX/V-707RX/V-707R
=
INPUT ADJUST MEASURING
ITEM PREPARATION/SETTING SIGNAL (or CHECK) POINT: RESULT REMARKS
= @ Connection is same as in Fig. 5-1, but engage 1-kHz filter.
e@ Record a 1-kHz signal in FWD (REV) direction. Rewind (wind) tape to midpoint of
recorded portion. Record a ‘‘no signal’’ portion in FWD (REV) direction. Find the
difference between the 1-kHz portion and the “no-signal” portion.
16. Erase efficiency FWD & REV record/play
modes ~ LINE IN:
TAPE SELECTOR: METAL 1 kHz/+ 1 dB OUTPUT: Ref. output
Tape: MTT-5072 ~ (0.869 V) Check 65 dB wid vali level:
TAPE SELEC- 4 : +5 dB (1.38 V)
TOR: NORMAL No signal
Tape: MTT-501
| e@ Connection: Fig. 5-1, but engage 1-kHz filter.
e Record a 1-kHz signal for several seconds in the FWD (REV) direction. Then push
the REC MUTE button to provide four seconds of blank space on the tape (At this
time, make sure the RECORD button indicator lamp flashes on and off).
After the deck automatically goes in to the record-pause mode, rewind (wind) and
17. REC MUTE play the tape in FWD (REV) direction. Find the difference between the 1-kHz
function portion and the ‘‘no signal’ portion.
=
LINE IN:
FWD & REV record/play 1 kHz/+1 dB PUT: Ref. output
modes ‘ (0.869 V) Check OUTPUT: level:
TAPE SELECTOR: CrO2 | 65 dB min. ratio +5 dB (1.38 V)
Tape: MTT-5061 4 .
No signal
@ Connection: Fig. 5-1, but do not connect LINE IN(R), and engage 1-kHz filter.
@ Set the deck to FWD (REV) record mode. Find the difference between the 1-kHz
‘recorded portion (L-ch) and the ‘’no signal’’ portion (R-ch).
18. Channel
separation FWD & REV record/play LINE IN:
modes L-ch: 1 kH2z/—9dB | Check OUTPUT: ;
TAPE SELECTOR: Cr02 (275 mv) 30 dB min, ratio
Tape: MTT-5061 R-ch: No signal
e Connection: Fig. 5-1, but do not connect LINE IN (L) and OUTPUT (L).
e Record a 125-Hz signal on the R-ch in FWD (REV) direction and then play the tape and
note the output level. Invert the tape and play the R-ch track in the FWD (REV) direction.
19. Adjacent track Check the leakage level against the output reference of the previously recorded portion.
crosstalk
FWD & REV record/play LINE IN:
modes L-ch: No signal Check OUTPUT:
TAPE SELECTOR: Cr02 R-ch: 125 Hz/—9 dB 40 dB min. ratio
Tape: MTT-5061 (275 mv)
® Record a 1-kHz signal in the FWD direction with the NR switch OUT.
@ Play this portion in the FWD direction with the NR switch pressed to OUT and then
press to 00 B(D0C). Obtain the difference in the output level between the OUT
and OO 8 (O0C) positions. Repeat the above process using a 10-kHz signal.
20. DOLBY NR LINE IN: OUTPUT:
effect 1 kHz/—29 dB 5.5 dB £2.5 dB devi-
(B Type) FWD record/play mode (27.5 mv) ation(3dB~8dB)
TAPE SELECTOR: Cr02 > Check Re Dolby NR B
Tape: MTT-5061 LINE IN: OUTPUT:
10 kHz/—-39 dB 10 dB +2 dB devi-
(8.69 mV) ation(8dB ~20dB)
LINE IN: OUTPUT:
FWD record/play mode t aby qe fede = ab dev
27.5 mV i ~ Dolb
le Tyner TAPE SELECTOR: Cr02 Chask isa sila eaase e vancee '
Tape: MTT-5061 LINE IN: OUTPUT: ~ V-707R
10 kHz/—49 dB | 18 dB +2dB devi-
(8.69 mV) : ation(16dB~20dB)
18