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2.
ELECTRICAL
ADJUSTMENT
Note: The adjustment should be performed in the order given in the
service manual. As a rule, adjustments about playback should be
performed before those about recording.
The adjustments should be performed before: for both L-CH and
R-CH.
*
Switches
and controls shoud
be set as follows
unless otherwise
specified.
DOLBY
NR switch:
OFF
MPX
FILTER switch:
OFF
MONITOR
switch:
Tape
*
Standard Record:
Deliver the standard input signal level to the input jack and set the
REC LEVEL control to obtain the standard output signal level.
~ Record Mode —
AF OSC
LINE OUT
LINE IN
Standard Input Level
LINE IN|
source impedance
10kQ
___
input level
0.25 V (- 10 dB)
|
Standard Output Level
LINE OUT
[toad impedance |_—a7EQ
adv (= 5B)
Test Tape
|_P-4-A100 | 10 kHz, ~104B | Azimth Adjustment _|
PB Level Adjusumet
WS-48B
Tape Speed Adjustment
Test Mode
Porcedure:
1.
Mode: FWD playback
Tast jee
P-4-A100
(10 kHz, ~ 10 dB)
VTVM
LINE OUT
2.
Turn the adjustment screw for the maximum
output levels. If these
levels do not match, turn the adjustment screw until both of output
levels match together within | dB.
within
L-CH
peak
within
1 dB
Da R-CH
ie
peak
crew
, am
—
position
angle
L-CH peak
R-CH peak
3.
Phase Check
Mode: playback
test tape
P-4-A100
(10 kHz, — 10 dB)
LINE OUT
Screen
pattern
in phase
45°
90°
135°
180°
bo nmnnmne aamenncentll
Good
Wrong
4.
After the adjustment, lock the screws with locking compound.
Adjustment Location: Record/Playback head
TC-K570
TC-K670/K677ES
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