Sony TC-K670 - Electrical Adjustments; General Settings and Record;Playback Azimuth; Playback Output Level Matching

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
This
set
will
get
into
test
mode
by
shorting
the
pins
of
CNE707
(TEST)
on
MA
I N(A)
board
before
turning
the
power
on.
Record/Playback
Head
Azimuth
Adjustment
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)
L-CH
A7kQ4
oscilloscope
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
Adjustment
screw
Adjustment
screw