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TD-W217TNev
.
TD-W218BKwe/een/e/usut
@ Electrical Adjustment Procedure
Check and Adjustment
1 Cheking
Input signal
Output raise
(Frequency, level)
value,deviation value
DOLBY B
2
5kHz, Cal. — 20dB
+3.5dB + 1.5dB
3
1kHz, Cal. — 40
+16.2dB + 2 dB
DOLBY C
(Rec)
DOLBY
circuit
Signal input: LINE IN
Cal.level: 400Hz,
1kHz, cal. — 40dB
+5.7 dB + 2dB
(Rec.mode)
— 8dBs
pin.
5kHz, Cal. — 20
+2.9dB + 2.5 dB
1kHz, Cal
0dB +1dB
Adjustment and Confirmation
Standard
Adjusting
*2 Playback
| Test tape
Play back VTT727, then confirm that the level at JLINE OUT
Deck
level adjust- | VIT727 : 400Hz
LINE OUT is -4.5 dBs'+ 0.5 dB.
4.5 Bs+0.5 dB)
L:VR117
ment
Adjust VR112/VR212 and VR117/VR217
so that [Phone Out
R:VR217
LINE OUT level becomes -4.5 dBs.
-21 dB +2548
Deck [Al
-1.5 0B
L: VR112
R:VR212
Play back TMT735 test tape, and adjust VR116,] with 12.5kHz
| Deck
*3 Playback
Test tape
frequency | TMT735:1kHz/12.5kHq VR216 (deck [B]) and VR111, VR211 (deck [A])} as reference,
L: VR116
response
VTT739: 1kKHz/63Hz
| so that deviation of 12.5 kHz to that of 1 kHz is] 0.5 + 0.5 dB
R: VR216
adjustment
0.5 + 0.5 dB (deck [A]) and 0 + 0.5 dB (deck[B).| (deck [A]) and | Deck
0+0.5 dB
(deck [B]) at
1 kHz
63 Hz (check):
+2+3 dB
95 kHz + 1
Deck
kHz
L8401
Then, play back VTT739 test tape to confirm
that deviation of 63 Hz to 1kHz is +2 + 3 dB.
L: VR111
R: VR2114
Connect frequency counter to the CN845 and
adjust L8401 so that the counter reads 95 kHz.
*4 Bias
frequency
adjustment
Frequency counter
TP: CN845 pin 1
Deck
L-ch:
L1401
R-ch:
L2401
DC.Voltmeter
Minimum
TP: CN845
*5 Slave
oscillation
(HX PRO)
adjustment
This step must be performed
after the bias
frequency adjustment.
Load a metal tape and set the deck to the
recording mode.
i
Adjust L1401 and L2401 to minimize respective
voltages of CN845 (PIN 3 — 4) at. Lch and (PIN 3
—5) at Reh.
1. Supply at.1 kHz signal to the LINE IN termi-
nals at -19 dBs, confirm that LINE OUT level
is -8 dBs.
2. Confirm that difference level between left and
right within 2dB.
LINE IN
: -~19 dBs
+2dB
6 Input
sensitivity
level
check
24 (No. 4357)
es
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