X-SG7/SG7G
ADJUSTMENT
3
{
AC voltmeter
AC voltmeter
Oscilloscope
Distortion meter
AG
SYSTEM
CONTROL
REC
IN
PLAY
OUT
L
R
KSJ-0816
Order
Item
Input
setting
Output
setting
Deck
setting
Adjustment points
Adjustment method
Fig.
Unless otherwise specified, set the respective switches as follow :
TAPE : NORMAL DOLBY : OFF INPUT : REC IN OUTPUT : PLAY OUT
I. Cassette mechanism section (Recording/play head adjustment)
< 1 >
Demagnetization
and cleaning
—
—
Power : OFF
Demagnetization,
cleaning, PLAY
Recording head,
erase head, capstan,
pinch roller
Demagnetize the REC/
PLAY head with the
head eraser. Clean the
REC/PLAY head, erase
head, capstan and
pinch roller using a
cotton swab slightly
damped with alcohol.
< 2 >
Azimuth of the
REC/PLAY head
TCC-153
MTT-114
10KHz, -10dB
LINE OUT
(Lch or Rch)
PLAY
Adjust the output to
maximum and adjust
the azimuth adjustment
screw for the Lissajous
waveform pattern of
the oscilloscope to
become close to a 45˚
straight line.
II. Printed circuit board adjustment (X28-297)
(1)
Tape speed
(normal)
TCC-110
MTT-111
3KHz
(A)
PLAY
MOTOR VR.
Adjust so ; that the
frequency is 3KHz at
the tape center.
(2)
Playback level
TCC-130
400 Hz
(A)
MANUAL
ADJUSTMENT
MODE PLAY
ADJUSTMENT
VALUE
UP : [DOLBY] KEY
DOWN : [RVS
PLAY] KEY
CHANGE OF
ADJUSTMENT
MODE [CRLS] KEY
Output level : -1dBs
(3)
Bias current
TCC-108A
12.5KHz, -21dBm
(A)
MANUAL
TEST MODE
REC and PLAY
-21dBm
(4)
Recording level
TCC-108A
400Hz, -21dBm
(A)
MANUAL
TEST MODE
REC and PLAY
-21dBm
RVS
FWD
✜
The method of the manual adjust-
ment mode.
(1) Setting
Shorting the TEST pin of (X28-
)(A/5) TP5 —
w
— TP4 with the
diode, plug the power cord to the
AC wall let.
(2) Refer to manual adjustment
mode(3-3), if require more
details.
(A) Measurement Equipment Connection
G
