Adjustment - Kenwood RXD-M52-L Service Manual

QQ
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CD section
NO. ITEM
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
[1]
CHECK
FOCUS ERROR
BIAS
[2]
(Set up vertically)
FOCUS ERROR
BIAS
[3]
(Set up horizontally)
Note:
Type 4disc: SONY YEDS-18 Test Disc or equivalent.
Keep the step of adjustment.
CASSETTE DECK
NO. ITEM
Unless otherwise specified, set the respective switches as follows:
TAPE: NORMAL
ø. Cassette mechanism (REC/PB head adjustment)
TE
Demagnetization
L 13942296513
and cleaning
REC/PB head
azimuth
¿. Capstan motor adjustment
Tape speed
(NORMAL)
¡. PC board adjustment
Playback level
Bias current
Measurement equipment connection
+
-
www
.
INPUT
SETTINGS
Connect the DC voltmeter
Test disc
between 3 and 4 of CN4
type 4
on X29.
Connect an oscilloscope
Test disc
as follows.
CH1:RF(X29,CN4, 1)
type 4
GND:VC(X29,CN4, 2)
Connect an oscilloscope
Test disc
as follows.
type 4 CH1:RF(X29,CN4, 1)
GND:VC(X29,CN4, 2)
INPUT OUTPUT
SETTINGS SETTINGS
INPUT: AUX IN OUTPUT: AUX OUT
— —
TCC-153
MTT-114 (B)
10kHz,-10dB
TCC-110
(B)
MTT-111
3kHz
TCC-130 (B)
TCC-108
12.5kHz
(B)
-24dBm
(A)
+
-
x ao
y
AC voltmeter AG
i
(A)
8

ADJUSTMENT

CD PLAYER
OUTPUT
SETTINGS
SETTINGS
Press the PLAY/PAUSE
key to check that the
display is 03 or05.
Press the PLAY/PAUSE
key . Confirm that the
display is 05.
Press the PLAY/PAUSE
key . Confirm that the
display is 05.
CASSETTE DECK
ALIGNMENT
SETTINGS
(POWER OFF) REC/PB head
Q Q
demagnetization erase head
3 6 7 1 3
(PLAY) capstan
cleaning pinch roller
PLAY
RVS
VR.
PLAY
inside motor
PLAY VR1(Lch),VR2(Rch)
VR3(Lch)
REC PLAY
VR4(Rch)
u163
Oscilloscope
.
(B)
RXD-M52
2 9 9 4 2 8
ALIGNMENT ALIGN FOR
50±20mA
—
FE BIAS
Optimum eye pattern
VR 1
(V/H version only)
FE BIAS
Optimum eye pattern
VR 2
ALIGN FOR
0dBm=0.775V
Demagnetize the REC/PB head by
head eraser. Clean the REC/PB head
1 5 0 5 8 2 9 9 4
,eraser head, capstan and pinch
roller with a cotton swab immersed
in alcohol.
Adjust the output to maximum and
adjust the azimuth adjustment
screw for the Lissajous waveform
pattern of the oscilloscope to
FWD
become close to a 45ß straight line.
Adjust so that the frequency 3kHz
at the center of the tape.
-2.5dBm
-24dBm
m
co
AC voltmeter
Distortion meter
9 9
FIG.
FIG.
2 8 9 9
7