Adjustment - Kenwood RXD-M52-L Service Manual

CD section
INPUT
NO. ITEM
SETTINGS
TEST MODE : While pressing the CD PLAY/PAUSE key, plug the power cord into the AC power wall output.
Load the TEST DISC.
LASER CURRENT Test disc
[1]
CHECK type 4
FOCUS ERROR
Test disc
BIAS
[2]
type 4
(Set up vertically)
FOCUS ERROR
Test disc
BIAS
[3]
type 4
(Set up horizontally)
Note:
Type 4disc: SONY YEDS-18 Test Disc or equivalent.
Keep the step of adjustment.
CASSETTE DECK
INPUT
NO. ITEM
SETTINGS
Unless otherwise specified, set the respective switches as follows:
TAPE: NORMAL INPUT: AUX IN
ø. Cassette mechanism (REC/PB head adjustment)
Demagnetization
—
and cleaning
TCC-153
REC/PB head
MTT-114
azimuth
10kHz,-10dB
¿. Capstan motor adjustment
TCC-110
Tape speed
MTT-111
(NORMAL)
3kHz
¡. PC board adjustment
Playback level TCC-130
TCC-108
12.5kHz
Bias current
-24dBm
(A)
Measurement equipment connection
+ +
- -
AC voltmeter

ADJUSTMENT

OUTPUT
SETTINGS
Connect the DC voltmeter
between 3 and 4 of CN4
on X29.
Connect an oscilloscope
as follows.
CH1:RF(X29,CN4, 1)
GND:VC(X29,CN4, 2)
Connect an oscilloscope
as follows.
CH1:RF(X29,CN4, 1)
GND:VC(X29,CN4, 2)
OUTPUT CASSETTE DECK
SETTINGS SETTINGS
OUTPUT: AUX OUT
(POWER OFF)
demagnetization
—
(PLAY)
cleaning
(B) PLAY
(B) PLAY
(B) PLAY
(B) REC PLAY
AG
(A)
CD PLAYER
ALIGNMENT
SETTINGS
Press the PLAY/PAUSE
key to check that the
—
display is 03 or05.
Press the PLAY/PAUSE
FE BIAS
key . Confirm that the
VR 1
(V/H version only)
display is 05.
Press the PLAY/PAUSE
FE BIAS
key . Confirm that the
VR 2
display is 05.
ALIGNMENT
0dBm=0.775V
Demagnetize the REC/PB head by
REC/PB head
head eraser. Clean the REC/PB head
erase head
,eraser head, capstan and pinch
capstan
roller with a cotton swab immersed
pinch roller
in alcohol.
Adjust the output to maximum and
adjust the azimuth adjustment
screw for the Lissajous waveform
pattern of the oscilloscope to
RVS FWD
become close to a 45ß straight line.
VR. Adjust so that the frequency 3kHz
inside motor at the center of the tape.
VR1(Lch),VR2(Rch)
VR3(Lch)
VR4(Rch)
AC voltmeter
Oscilloscope
(B)
RXD-M52
ALIGN FOR FIG.
50±20mA
Optimum eye pattern
Optimum eye pattern
ALIGN FOR FIG.
-2.5dBm
-24dBm
Distortion meter
7