Sanyo MCDZX-250-F Service manual
FILE NO.
Service Manual
CD Portable Radio
Cassette Recorder
MCD-ZX250F(BL)
(XE)
MCD-ZX250F(WH)
(XE)
MCD-ZX250F (UK)
CONTENTS
Laser beam safety precaution .......................................... 1
IC Block Diagram & Description ....................................... 1,9
Tuner Adjustments ........................................................... 2
Wiring Connection ........................................................... 3
Exploded View (Cabinet & Chassis) ................................ 4
Parts List .......................................................................... 6
Schematic Diagram .......................................................... 11
Wiring Diagram ............................................................... 16
Block Diagram .................................................................. rear
PRODUCT CODE No.
164 128 02 250F(BL)/XE
164 128 13 250F(WH)/XE
164 128 01 250F/UK
REFERENCE No. SM5810611
LASER BEAM SAFETY PRECAUTION
• 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
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL-USYNLIG LASER STRÅLING VED ÅBNING, NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION, UNDGÅ
UDS ÆTTELSE FOR STRÅLING.
VARNING-OSYNLIG LASER STRÅLNING NÄR DENNA DEL
ÄR ÖPPNAD OCH SPÄRR ÄR URKOPPLAD. STRÅLEN ÄR
FARLIG.
VORSICHT! -UNSICHTBARE LASERSTRAHLUNG TRITT
AUS, WENN DECKEL GEÖ FFNET UND ENN
SICHERHEITSVERRIEGELUNG ÜBERBRÜCKT IST. NICHT,
DEM STRAHL AUSSETZEN.
VARO !-Avattaessa ja suojalukitus ohitettaessa olet alttiina
näkymättömälle lasersäteilylle. Älä katso säteeseen.
IC BLOCK DIAGRAM & DESCRIPTION
IC201 BA3308 (Pre-Amp.) IC301 TA8227 (Power Amp.)
MUTE
ch1 ch2
CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
ALC
1
NF 1 INPUT 1 OUTPUT 1 GND ALC Vcc OUTPUT 2 INPUT 2 NF 2
23456789
IC501 TC4052(Defferential 4-Channel Multiplexer)
V
DD
16
10
A
OUT c IN
OUT c IN
OUT c IN
OUT c IN
13 X-COMMON
0X
12
1X
14
2X
15
3X
11
INH
0Y
9
B
LOGIC LEVEL CONVERTER
6
OUT c IN
OUT c IN
OUT c IN
OUT c IN
1
1Y
5
2Y
2
3Y
4
3
Y-COMMON
87
SS
V
V
EE
- 1 -
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 : AM
Step Adjustment
Adjusting Connections
Circuit lnput Output
Closed the output
terminal by sweep
1
2
3
4
5
IF generator to(19)IC101 465KHz Low T103
generator,it place
to MW ANT
Tuning Connect AM SG to Connect VTVM to 515 KHz Low end T101
coverage test loop speaker terminals. 1640 KHz High end C3
Tracking
Connect AM SG to Connect VTVM to 600 KHz 600 KHz MW ANT
test loop speaker terminals 1400 KHz 1400 KHz C4
Connect sweep
(H) 0and C112(E)
SG
Frequency
Position of VTVM
Tuning dial Oscilloscope
b. FM Adjustment Band switch : FM FM Dummy antenna : 75 ohms unbalance
Adjusting Connection position of VTVM
Step SG Frequency
Circuit Input Output tuning dial Oscilloscope
Connect sweep Connect VTVM to
1
2
3
4
5
IF generator to IC101 generator to (19)PIN 10.7MHz Low T104 andT102
IC101(22)pin (E)
Tuning Connect FM SG to Connect VTVM to 87.0 MHz Low end L102
coverage FM ANT(A) & D102(B) speaker terminals. 109.0 MHz High end C1
Tracking
Connect FM SG to Connect VTVM to 90.0 MHz 90.0 MHz L101
FM ANT(A) &D102(B) speaker terminals. 106.0 MHz 106.0 MHz C2
IC101(H) and C112(E)
Adjustment
Max.
Max.
Max.
Max.
- 2 -
WIRING CONNECTION
This is a basic wiring connection.
- 3 -
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