Service Manual
FILE NO.
REFERENCE No.
SM5810402
PRODUCT CODE No.
164 099 01 500F
164 099 02 550F
CD Portable Radio
Cassette Recorder
MCD-ZX500F(XE)
MCD-ZX550F(XE)
MCD-ZX500F
MCD-ZX550F
CONTENTS
Laser Beam Safety Precaution ........................................ 1
IC Block ............................................................................ 1,8
Tuner Adjustment ............................................................. 2
Tape Adjustment .............................................................. 3
Exploded View (Cabinet & Chassis) ................................ 4
Parts List .......................................................................... 5
Schematic Diagram (MAIN) ............................................. 10
Schematic Diagram (Tuner) ............................................. 12
Wiring Diagram (CD MAIN) .............................................. 14
Wiring Diagram (DISPLAY, TUNER, and RECTIFIER) .. 15
Wiring Connection ............................................................ Rear
- 1 -
· Pickup that emits a laser beam is used on this CD section.
CAUTION :
USE OF CONTROLS OR ADJUSTMENTS OR
PERFORMANCE OF PROCEDURES OTHER
THAN THOSE SPECIFIED HEREIN MAY RESULT
IN HAZARDOUS RADIATION EXPOSURE.
LASER OUTPUT ................ 0.6 mW Max. (CW)
WAVE LENGTH ................. 790 nm
LASER BEAM SAFETY PRECAUTION
IC BLOCK DIAGRAM & DESCRIPTION
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL-USYNLIG LASER STR LING VED BNING, N R
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION, UNDG
UDS
TTELSE FOR STR LING.
VARNING-OSYNLIG LASER STR LNING N R DENNA DEL
R
PPNAD OCH SP RR
R URKOPPLAD. STR LEN
R
FARLIG.
VORSICHT! -UNSICHTBARE LASERSTRAHLUNG TRITT
AUS,
WENN
DECKEL
GE
FFNET
UND
ENN
SICHERHEITSVERRIEGELUNG
BERBR CKT IST. NICHT,
DEM STRAHL AUSSETZEN.
VARO !-Avattaessa ja suojalukitus ohitettaessa olet alttiina
n kym tt m lle lasers teilylle.
l katso s teeseen.
1
FIN2
2
FIN1
3
E
4
F
5
TB
6
TE-
7
TE
8
TESI
9
SCI
10
TH
11
TA
12
TD-
13
TD
14
JP
15
TO
16
FD
17
FD-
18
FA
19
FA-
20
FE
21
FE-
22
AGND
23
NC
24
SP
25
SPG
26
SP-
27
SPD
28
SLEQ
29
SLD
30
SL-
31
SL+
32
JP-
33
JP+
34
TGL
35
TOFF
36
TES
37
HFL
38
SLOF
39
CV-
40
CV+
41
RFSM
42
RFS-
43
SLC
44
SLI
45
DGND
46
FSC
47
TBC
48
NC
49
DEF
50
CLK
51
CL
52
DAT
53
CE
54
DRF
55
FSS
56
Vcc2
57
REF1
58
VR
59
Lf2
60
Ph1
61
BH1
62
LDD
63
LDS
64
Vcc1
PIN FUNCTION
V
CC1
LD
S
LD
D
BH
1
PH
1
LF2
VR
RE
F
1
V
CC2
FS
S
DR
F
CE
DA
T
CL
CL
K
DE
F
64
63
62
61
60
59
57
56
58
55 54 53 52 51 50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
FIN2
FIN1
E
F
TB
TE-
TE
TESI
SCI
TH
TA
TD-
TD
JP
TO
FD
APC
RF DET
I/V
VCA
VCA
BAL
TE
+
-
T.SERVO
& T .LOGIC
F.SERVO & F
.LOGIC
SPINDLE SERVO
SLED SERVO
RF Amp
SLC
REF
U-COM
INTER FACE
+
-
+
-
+
-
+
-
+ -
+ -
+ -
+ -
FD
-
FA
FA
-
FE
FE
-
AG
N
D
NC
SP
SP
G
SP
-
SP
D
SL
E
Q
SL
D
SL
-
SL
+
JP
-
NC
TBC
FSC
DGND
SLI
SLC
RFS-
RFSM
CV+
CV-
SLOF
HFL
TES
TOFF
TGL
JP+
IC901 LA9242M (Servo)
12
3
4
56
789
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Vcc
Vref
VIN4
VG4
Vo8
Vo7
GND
Vo6
Vo5
VG3
VIN3
CD
RES
Vcc
Mute
VIN1
VG1
Vo1
Vo2
GND
Vo3
Vo4
VG2
VIN2 Reg OUT Reg IN
Vcc
11k
11k
11k
11k
Level
Sift
BTL
Driver
BTL
Driver
Level
Sift
RESET
Regulator
Level
Sift
BTL
Driver
Level
Sift
BTL
Driver
IC903 LA6541 (CD Driver)
1
234
5
678
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
FM
RF
AM
RF
AM
MIX
FM
MIX
FM
OSC
AM
OSC
REG
Vcc1
Vcc2
GND2
GND1
DECODER
PHASE
COMP
PILOT
DET
TRIG
ST-SW
VCO
DET
DET
AM-IF
S-METER
FM-IF
AGC
FF
FF
FF
ST
LED
TUN
LED
IC101 LA1824 (Tuner)
- 2 -
TUNER ADJUSTMENTS
Use a plastic screw driver for adjustments.
Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter.
Set of unit
Supply voltage
: DC 12.0V
Speaker impedance : 8 ohms
Standard output
: 50 mW
Function switch
: RADIO
a. Parts Location
a. AM Adjustment
Band switch : MW
Adjusting
Connections
SG
Position of
VTVM
Circuit
lnput
Output
Frequency
Tuning dial
Oscilloscope
Connect sweep
1
IF
generator to IC101(19)
455KHz
Low
T103
(H) and C107(E)
2
Tuning
Connect AM SG to
Connect VTVM to
515 KHz
Low end
T101
3
coverage
test loop
speaker terminals.
1640 KHz
High end
C3
4
Connect AM SG to
Connect VTVM to
600 KHz
600 KHz
MW ANT
5
test loop
speaker terminals
1400 KHz
1400 KHz
C4
b. FM Adjustment
Band switch : FM
FM Dummy antenna : 75 ohms unbalance
Adjusting
Connection
position of
VTVM
Circuit
Input
Output
tuning dial
Oscilloscope
Connect sweep
Connect VTVM to
1
IF
generator to IC101
generator to (19)PIN
10.7MHz
Low
T104 andT102
IC101(22)pin (E)
IC101(H) and C115(E)
2
Tuning
Connect FM SG to
Connect VTVM to
87MHz
Low end
L102
3
coverage
FM ANT(A) & D102(B)
speaker terminals.
109MHz
High end
C1
4
Connect FM SG to
Connect VTVM to
90 MHz
90 MHz
L101
5
FM ANT(A) &D102(B)
speaker terminals.
106.0 MHz
106.0 MHz
C2
Step
Adjustment
Closed the output
terminal by sweep
generator,it place
to MW ANT
Max.
Max.
Tracking
Step
SG Frequency
Tracking
Max.
Max.
Adjustment
Max.
C107(E)
IC101(19P)(H)
C1
C2
C4
C3
T103
T102
T101
A
B
- 3 -
TAPE DECK ADJUSTMENTS
1. HEAD REPLACEMENT
After replacement, demagnetize. the heads by using a degausser.
Be sure to clean the heads before attempting to make any adjustments.
All wiring should be returned to the original position after work is completed.
2. HEAD AZIMUTH ADJUSTMENT
(1) Load the test tape(VTT-703, etc., 10 KHZ) for azimuth
adjustment.
(2) Press the PLAY button.
(3) Use a cross-tip screwdriver to turn the screw for azimuth
adjustment so thae the left and right output are maximized
(4) Press the STOP button.
(5) After completion of the adjustment, use thread lock(TB-1401B)
to secure the azimuth-adjustment screw.
3 MOTOR REPLACEMENT
4 AC BIAS FREQUENCY ADJUSTMENTS
(1) connect counter to T201(BS);
(2) R/P swith in recording state;
(3)Adjusting T801 use a plastic screw,AC bias frequency: 80KHZ..
5 MOTOR SPEED ADJUSTMENT
(1) Insert the test tape(MTT-111N, etc., 3,000 HZ)
(2) Press the PLAY button.
(3) Use a flat-tip screwdriver to turn the SVR(located inside the
rear of the motor) to adjust SVR so that the frequency counter
become 3,000 HZ
6. CHECKING THE MECHANISM TORQUSE AND TENSION
Clean the head, capstan and pinch roller making any measurement.
Measurement
Take-up torqe
Back tension
Tape tension
Drive-power cassette
Cassette ofr
PLAY:TW-211A
PLAY: TW-2111A
TW-2412
measurement
F.FWD/REW:TW-2231
PLAY
30-60 gr.cm
2.0 - 4.5 gr. cm
60 gr or more
F.FWD
55-120 gr.cm
------
------
REW
55-120 gr.cm
------
------
PLAY
HEAD AZIMUTH
ADJUSTMENT
TEST TAPE
MOTOR SPEED
ADJUSTMENT
(Reference figure)
(Reference figure)
- 4 -
EXPLODED VIEW(CABINET & CHASSIS)
1
5
Y01
Y02
Y03
Y03
Y03
Y04
Y06
Y04
Y05
Y1
1
Y12
Y13
Y13
Y17
Y18
Y19
Y20
Y20
Y20
Y21
Y21
Y22
Y20
Y15
Y16
Y16
Y14
Y14
Y07
Y08
Y09
Y09
Y10
Y07
Y02
Y02
52
2
3
51
51
4
6
6
7
8
9
10
11
12
13
14
40
45
41
57
15
17
17
18
19
20
21
22
23
25
71
72
28
32
34
35
36
37
38
31
29
73
30
26
33
39
27
24
53
54
55
56
74
16
6
6
46