RXD-M51/M51MD
11
ADJUSTMENT
(b)
(a) Laser Power
Pickup
0.05~0.15 mW
Optical power meter
RF signal in test mode (PLAY).
Perform the tangential and focusing offset are focused
into one point on the display. The crossing points above
and below the center shall also be looked clearly.
No.
1
2
ITEM
LASER
POWER
FOCUS
ERROR
BIAS
INPUT
SETTING
–
Test disc
Type 4
OUTPUT
SETTING
Connect an oscilloscope
as follows.
(+)side : RF(CN1-1)
GND : VC (CN1, 4)
Set the senor section of
the optical power meter
on the pickup lens.
PLAYER
SETTING
Press the "PLAY"
key to check that the
display is "03".
Press the "PLAY"
key. Confirm that
the display is "05".
ALIGNMENT
POINT
VR1
–
ALIGN FOR
On the power
from.0.05 to
0.15mw. when the
diffraction grating is
correctly aligned
with the RF level of
0.8Vp-p or more
Optimum eye pattern
FIG.
(a)
(b)
Note:
Type 4disc :SONY YEDS-18 Test Disc or equivalent.
LPF : Around 47k
Ω
+ 390pF or so.
Adjustment of CD player
TEST MODE : While pressing the [DISC 3 PLAY] key, plug the AC power cord into the AC outlet.
RF signal : AC coupled
★
The MD Adjustment is listed on page 8 through p10.
AG
{
(A)
(B)
Oscilloscope
AC voltmeter
AC voltmeter
Frequency counter
X09 CN3
TEST PIN
1
2
3
PLAY (L)
GND
PLAY (R)
RVS
FWD
NO.
ITEM
INPUT
SETTING
OUTPUT
SETTING
CASSETTE TAPE
DECK SETTING
ALIGNMENT
POINTS
ALIGN FOR
FIG.
Unless otherwise specified, set the respective switches as follows:
0dBs = 0.775V
TAPE : NORMAL
DOLBY : OFF
I Cassette mechanism unit (Adjustment of the REC / PLAY head)
(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
SCC-1727
TCC-153
MTT-114
10kHz, -10dB
(B)
PLAY
Adjust the output to maximum and
adjust the azimuth adjustment screw
for the Lissajours waveform pattern of
the oscilloscope to become close to a
45˚ straight ling.
II PC board adjustment.
(1)
BIAS
CURRENT
(A)
Adjust the AG for the
output of the DECK to
become 12.5KHz –20dBs.
400Hz / 12.5kHz
(AC-224)
(B)
REC PLAY
VR3(L)
VR4(R)
Record 400Hz and 12.5kHz alternately,
and adjust the bias current adjustment
potentiometer for the playback levels to
become the same.
RXD-M51MD(K)
COVER1,1P(
98.12.10
19:12
y[W
22
