Teac CX-400 - CHANNEL SEPARATION; ADJACENT TRACK CROSSTALK; DOLBY NR EFFECT

MEASURING
cael cae POINT
ADJUST
INSTRUCTION INPUT SIGNAL (or CHECK) | REMARKS
RESULT
e Connection — Fig, 5-1. But do not connect LINE IN (R), switch ON 1 kHz filter.
e Set deck irirecord mode. Find differences between 1 kHz recorded portion (L-ch)
and “no signal’’ portion (R-ch).
18. Channel separation LINE IN
; BIAS/EQ — Co (C10, ) L-ch 1 kHz/—9 dB OUTPUT
Tape — MTT-506 (275 mV) _ 30 dB min. ratio
R-ch No signal
e@ Connection — Fig, 5-1, But do not connect LINE IN (L) and OUTPUT (L).
e Record 125 Hz on R-ch. Note output level of its recorded portion.
Invert tape and play R-ch track. Check leakage level against the output reference
19. Adjacent track of previously recorded portion, ;
crosstalk LINE IN
BIAS/EQ — Co (Cr0,) L-ch No signal OUTPUT .
Tape — MTT-506 R-ch 125 Hz/—9 dB 40 dB min. ratio
(275 mV) :
@ Record 1 kHz with DOLBY NR switch to OUT. Play its portion with switch, OUT and
IN. Get the output level difference between OUT and IN positions.
Repeat the above process for 10 kHz.
LINE IN OUTPUT
20. Dolby NR effect ee Mere 2) 1 kHz/—29 dB Variation
(27.5 mV) 3 dB~8 dB
”
10 kHz/—39 dB
(8.69 mV) ;
TEAC REC PLAY
C163/C263 | Record bias
L103/L203 | Record frequency response for
Co (CrO,) and NORMAL
L104/L204,) Record frequency response for
METAL —
L106/L206 | Bias trap
R11/R21 Output level
R12/R22 Playback frequency response
R13/R23 — | Peak level meter
‘R14/R24 Record level
Fig. 5-6
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