Sanyo CWM-460, MCDS-925, MCDS-925-F Service manual
FILE NO.
Service Manual
CD Portable Radio
Cassette Recorder
SPECIFICATIONS
(TAPE DECK SECTION)
Recording System.................AC bias, 4-channel stereo
Erasing System .....................Magnet erase
Tape speed ...........................4.75 cm/sec.
Fast forward and
Rewind time ....................Approx. 110 sec. (C-60 tape)
Frequency range.................. 80 - 12,000 Hz (Normal tape)
(CD PLAYER SECTION)
Channels............................... 2 channels stereo
S/N ratio ................................ 73 dB
Wow & Flutter........................Below measurable limits
Sampling frequency ..............44.1 kHz
Quantization.......................... 16 bits linear/ch
Pickup light source ................ Semi-conductor laser
Pickup wave length ............... 790 nm
Laser output ..........................Continuous wave max. 0.6 mW
CWM-460 (US)
(MX)
MCD-S925 (CA)
MCD-S925F(XE)
(AU)
(PA)
PRODUCT CODE No.
164 074 00 CWM-460/US
164 074 05 CWM-460/MX
164 074 01 MCD-S925/CA
164 074 02 MCD-S925F/XE
164 074 03 MCD-S925F/AU
164 074 04 MCD-S925F/PA
(RADIO SECTION)
Tuning range......................... FM : 87.9 - 107.9 MHz(CA,US,MX)
: 87.5 - 108 MHz(PA,AU,XE)
AM : 520 - 1,710 kHz
(10 kHz step)(PA,CA,MX)
:522 - 1611 kHz
(9 kHz step)(PA,AU,XE)
Antenna.................................Built-in ferrite bar and telescopic rod
..............................................antenna
(GENERAL SECTION)
Power output......................... 3W/ch (DC max)
Speaker.................................12 cm x 2. Piezoelectric x 2 (4 ohms)
Terminal impedance ............. PHONES : 32 ohms
Power source ........................ AC : 120V, 60Hz (CA,US,MX)
: 230V, 50Hz (XE)
: 230-240V, 50Hz (AU)
: 110-120/220-240V, 50/60Hz (PA)
DC : 12 V (8 "R20/D" batteries)
Dimensions ...........................615 (W) x 275 (H) x 253 (D) mm
Weight (approx.)....................6 kg (Not including batteries)
Specifications subject to change without notice.
REFERENCE No. SM5810217
LASER BEAM SAFETY PRECAUTION
68
66
67
65
19
20
21
22
64
63
62
61
23
24
25
26
27
29
30
28
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
59
60
56
57
58
78
77 E01
E02
COM1
COM2
COM3
Vdd2
Vdd1
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S15
S12
S13
S14
S16
S17/PE0
S18/PE1/SCK2
S19/PE2/SO2
S20/PE3/SI2
S21/PF0
S22/PF1/SCK1
S23/PF2/SO1
S24/PF3/SI1
S28/PM3
S25/PM0
S26/PM1
S27/PM2
S29/PN0/BEEP
S31/PN2
S30/PN1
S32/PN3
PJ3/DAC3
PJ2/DAC2
PJ1/DAC1
PJ0/DAC0
PK3
PK2
PK1/INT1
PK0/INT0
PH3/ADI3
PH2/ADI2
PH1/ADI1
PH0/ADI0
1
80
74
XIN
XOUT
FMIN
75
72
73
76
70
71
AMIN
SNS
HOLD
VDD
VSS
HCTR
LCTR
69
79
2
18
17
16
15
14
13
12
11
10
9
8
7
TEST1
TEST2
PA0
PA1
PA2
PA3
PB0
PB1
PB2
PB3
PC0
PC1
PC2
PC3
6
5
4
3
PG0
SCK0/PG1
SO0/PG2
SI0/PG3
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
SIO
BUS
DRIV.
1 / 2
V-DET
SNSFF
1 / 16,1 / 17
PROGRAMMABLE DIVIDER
LATCH
UNIVERSAL
COUNTER
(20bits)
RAN
512 x 4bits
RAN
6K x 16bits
ADDRESS
DECODER
BUS
DRIVER
INSTRUC-
TION
DECODER
ADDRESS DECODER
PROGRAM COUNTER
STACK
JUDGE
ALU
DAC
ADC
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
MPX
INTERRUPT
MPX
MPX
MPX
MPX
MPX
BEEP
LCPA/B
LCDA/B
SEG
PLA
LATCH
LCD
PORT
DRIVER
96
4
4
7
SELECTER
PHASE
DETECTOR
UNLOCK
F/F
COMMON
DRIVER
REFERENCE DIVIDERDIVIDER
CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
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 GEÖFFNET UND ENN
SICHERHEITSVERRIEGELUNG ÜBERBRÜCKT IST. NICHT,
DEM STRAHL AUSSETZEN.
VARO !-Avattaessa ja suojalukitus ohitettaessa olet alttiina
näkymättömälle lasersäteilylle. Älä katso säteeseen.
CAUTION – USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES
OTHER THAN THOSE SPECIFIED IN THE OPERATING INSTRUCTIONS MAY RESULT IN
HAZARDOUS RADIATION EXPOSURE.
THE PRODUCT SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLY
QUALIFIED PERSONNEL.
IC BLOCK DIAGRAM & DESCRIPTION
IC402 LC723369557 (LCD Driver)
- 1 -
TUNER ADJUSTMENTS
L803
L802
L801
FM ANT
T801
T802
IC801
TC801
TC802
AM COIL
• 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 12V
Speaker : 8 ohms
Standard output : 50 mW
Function switch : RADIO
a.PARTS LOCATION
(1). AM IF ADJUSTMENT
AM LOOP ANT
IC301
18PIN
(2). FM IF ADJUSTMENT
300PF
0.1U
0.1U
(FIG.1)
(FIG.2)
450 KHz
10.5
10.7
10.9
WAVE FORM
(MHZ)
BAND
MW-IF
BAND
FM-IF
STEP1SING.
FRE.
450KHz
STEP1SING.
FRE.
10.7MHz
RADIO
SETTING
RADIO
SETTING
ADJUST-
MENT
T802
ADJUST-
MENT
- - - -
REMARKS
ADJUST FOR
BEST IF WAVE
FORM
REMARKS
- - - -
- 2 -
TUNER ADJUSTMENTS
(3). TUNING FREQUENCY RANGE ADJUSTMENT
FM-SG
FM BAND
OSCILLOSCOPE
(EUROPE/ASIA)
FM Band: Set the internal modulation of Singnal
generator to 1 KHz Dev. 22.5KHz
NO.
BAND
SING.
ADJUST FOR
FRE.
1
2
3
87.5MHz
FM
108MHz
FM
REPEAT STEP 1 AND 2 SEVERAL TIMES
AM Band: Set the internal modulation of Singnal
generator to 30%1KHz
NO.
BAND
SING.
ADJUST FOR
FRE.
4
5
6
520KHz
AM
1710KHz
AM
REPEAT STEP 4 AND 5 SEVERAL TIMES
AM-SG
75 OHM
AM LOOP ANT
60cm
R803
FM ANT
AM BAND
R803
CD
VOLT AGE
METER
OUTPUT
CD
VOLT AGE
METER
OUTPUT
(FIG.3)
OSCILLOSCOPE
(4). AM TRACKING ADJUSTMENT
Signal Generator ...... Connects to the AM ANT. Coil througt the loop antenna.
Adjust for the indication of VTVM of the wave form scope to be maximum.
CHECK
1.5V+-0.1V
CHECK
5.0V+-0.1V
CHCK
1.5V+-0.1V
CHECK
7.5V+-0.2V
ADJUSTMENT
L803
- - - -
ADJUSTMENT
T801
- - - -
AM-SG
AC EVM
OUT
AM LOOP ANT
OSCILLOSCOPE
(AMERICA)
BANDAMSTEP
1
2
SING.
FRE.
600KHz
1400KHz
ADJUST FOR
MAXIMUM
SENSITIVITY
MAXIMUM
SENSITIVITY
3
60cm
(FIG.4)
REPEAT STEP 4 AND 5 SEVERAL TIMES
(5). FM RF TRACKING ADJUSTMENT
Signal Generator ...... Connects to the FM ANT JACK (FM IN) through the dummy.
FM-SG
75 OHM
FM ANT
AC EVM
OUTPUT
OSCILLOSCOPE
BANDFMSTEP
1
2
3
SING.
ADJUST FOR
FRE.
90MHz
MAXIMUM
SENSITIVITY
106MHz
MAXIMUM
SENSITIVITY
REPEAT STEP 1 AND 2 SEVERAL TIMES
ADJUSTMENT
L805
(ANT COIL)
TC801
ADJUSTMENT
L802
TC802
(FIG.5)
- 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 that 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.
PLAY
3. MOTOR SPEED ADJUSTMENT
(1) Insert the test tape(TCC-119, 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.
HEAD AZIMUTH ADJ.
4. CHECKING THE MECHANISM TORQUES AND TENSION
• Clean the head, capstan and pinch roller before making any measurement.
MOTOR SPEED ADJ.
Measurement Take-up torque Back tension
Test tape PLAY : CT-120M PLAY : CT-W
measurement FF,REW : CT-F
PLAY 30 - 70 gr.cm 1.0 - 6.0 gr.cm
F.FWD 55 g r.cm or more. -----
REW 55 gr.cm or more. -----
- 4 -
WIRING CONNECTION
This is a basic wiring connection .
DC 12V
BATTERY
BATTERY
P.W.B
CNP2A
AC IN
L-CH
SPEAKER BOX
R-CH
SPEAKER BOX
(15P)
CD MECHANISM
CNP11
(2P)
CD SWITCH P.W.B
(6P)
CN8
(7P)
P.T
CNP8
(7P)
CD MAIN/TUNER
CN7
(15P)
CN11
(2P)
DISPLAY P.W.B
CNP10
(8P)
P.W.B
CN502
(6P)
CNP7
(15P)
AC IN
SOCKET
CN3
(2P)
CN9
(15P)
CN6
(4P)
CNP4
(2P)
LR
CN1
(2P)
CN4
CN5
(2P)
(9P)
CNP5
(9P)
FM ROD
ANT.
CASS PRE-AMP P.W.B
CN10
(8P)
CN701
(4P)
YELLOW
- 5 -
TAPE DECK MECHANISUM
MOTOR
SWITCH
WHITE
RED
BLACK
R/P HEAD
M
EXPLODED VIEW(CABINET & CHASSIS)
1
2
11
13
14
12
15
16
17
18
19
20
21
5
6
8
57
Y02
Y02
Y02
Y02
Y04
Y01
Y06
Y04
Y06
Y08
Y08
Y09
Y08
Y11
Y12
Y13
Y14
Y15
Y09
3
4
23
7
26
25
24
27
30
28
29
31
34
35
51
38
37
39
40
39
40
41
42
52
53
54
52
53
54
71
72
73
74
Y18
Y18
Y18
Y18
Y18
Y19
Y20
Y21
Y21
Y21
Y22
Y22
Y23
Y23
Y23
Y21
Y21
Y21
Y22
Y22
Y23
Y23
Y23
61
75
43
44
58
59
58
60
56
55
- 6 -
PARTS LIST
PRODUCT SAFETY NOTICE
EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH THE
!!
IEC SYMBOL
OF SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED , USE ONLY THE REPLACEMENT PARTS
DESIGNATED, OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WATTAGE OR VOLTAGE THAT ARE DESIGNATED
IN THE PARTS LIST IN THIS MANUAL. LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS MUST BE MADE TO
DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING
THE PRODUCT TO THE CUSTOMER.
CAUTION : Regular type resistors and capacitors are not listed. To know those values, refer to the schematic diagram.
!
IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATE COMPONENTS IN WHICH SAFETY CAN
Regular type resistors are less than 1/4W carbon type and 0 ohm chip resistors.
Regular type capacitors are less than 50V and less than 1000µF of Ceramic type and Electrolytic type.
PACKING & ACCESSORIES
REF.NO. PART NO. DESCRIPTION
645 036 3429 CAUTION SHEET(MX)(US)
645 049 6318 POLYFOAM TOP
645 049 6325 POLYFOAM BOTTOM
645 020 3626 POLBAG,FOR AC CORD(PA)(XE)(AU)
645 049 6349 CARTON BOX(MX)(US)
645 049 7186 CARTON BOX(AU)
645 049 7193 CARTON BOX(XE)
645 049 6370 CARTON BOX(CA)
645 049 8152 CARTON BOX(PA)
645 049 6356 INSTRUCTION MANUAL(MX)(US)
645 049 7162 INSTRUCTION MANUAL(AU)
645 049 7179 INSTRUCTION MANUAL(XE)
645 049 6363 INSTRUCTION MANUAL(CA)
645 049 8145 INSTRUCTION MANUAL(PA)
!!
!
645 037 8454 AC LINE CORD,VDE APP(XE)
!!
!
645 037 9468 AC CORD SET,VDE APP(PA)
!!
!
645 038 2048 AC CORD SET,UL APP(MX)(CA)(US)
!!
!
645 022 1576 AC LINE CORD SET,SAA APP(AU)
645 047 8703 REMOTE CONTROL, HANDSET
CABINET & CHASSIS
REF.NO. PART NO. DESCRIPTION
1 645 049 5953 LID CASS(MX)(US)
1 645 049 5960 LID CASS(AU)(CA)(XE)(PA)
2 645 049 6240 CASS DOOR SPRING
3 645 049 6059 VOLUME KNOB,ROTARY
4 645 049 6189 VOLUME KNOB RING
5 645 049 6196 TUNING KNOB RING
6 645 049 5878 CABINET FRONT
7 645 025 1542 ASSY,GEAR CD DOOR
8 645 049 5557 ASSY MINI PANEL(PA)(XE)(AU)(CA)
8 645 049 5540 ASSY MINI PANEL(MX)(US)
11 645 049 6110 BUTTON SET,MEMO/PRESET/BAND
12 645 049 6073 TUNING BUTTON,UP/DOWN PUSH
13 645 049 6080 BASS BUTTON
14 645 049 6066 SLIDE KNOB,
15 645 049 6127 CASS BUTTON REC
16 645 049 6134 CASS BUTTON PLAY
17 645 049 6141 CASS BUTTON REW
18 645 049 6158 CASS BUTTON FFWD
19 645 049 6165 CASS BUTTON STOP/EJE
20 645 049 6172 CASS BUTTON PAUSE
21 645 049 6257 CASS BUTTON SHAFT
23 645 049 6486 HARD RUBBER,NO:RY-105112 DA11
24 645 049 6479 SOFT RUBBER,NO:RY-105118 DA11
25 645 025 2556 CD BRACKET 9503
26 645 049 6219 CD BRACKET,
27 645 049 6226 SW CD LOCKER,CD BKT F1Q61K
FUNTION CD/TAPE/RADIO
NEVER TOUCH THE LENS
REF.NO. PART NO. DESCRIPTION
28 645 025 2549 MAGNET NMB FERRITE CORES
29 645 025 2341 MAGNET FELT CD
30 645 049 6493 CD DOOR SPRING
31 645 049 5533 ASSY CD LID
34 645 049 6264 BKT PCB MOUNTING,MAIN PCB
35 645 049 8084 ASSY CABINET REAR,PA(PA)
35 645 049 5526 ASSY CABINET REAR
(MX)(XE)(AU)(CA)(US)
37 645 047 8758 BATTERY LID
38 645 049 6011 HANDLE
39 645 049 5915 SPK NET
40 645 049 5922 SPK PANEL FRONT
41 645 049 5496 ASSY BOX REAR L
42 645 049 5502 ASSY BOX REAR R
44 645 049 6462 CD MECHANISM DA11N
52 645 049 5786 BUZZER
53 645 049 5779 5" SPK,W/BLACK CAP
54 645 049 5694 2P J WIRE AWG22UL,SPK TO MAIN
55 645 049 6004 DISPLAY LENS,SANYO
56 645 049 5984 CASS DOOR LENS
57 645 026 6454 ASSY,CASS GEAR
58 645 049 7216 GRILL CLOTH,RC-801K-19(PA)(XE)
58 645 049 6516 GRILL CLOTH,RC-801K-19/UL(CA)
58 645 049 6509 GRILL CLOTH,RC-801E/UL
(MX)(AU)(US)
59 645 025 2587 HOLDER MAGNET
60 645 049 6233 BKT LCD DISPLAY
FIXING PARTS
REF.NO. PART NO. DESCRIPTION
Y01 645 036 2644 SCR 3X8,CASS KEY SHAFT
Y02 645 016 5078 SCREW,MAIN PANEL
Y04 645 014 1911 SCREW,CD KEY BD TO F PANEL
Y06 645 016 5078 SCREW,CASS MECHA
Y08 645 049 6271 SCR 2.6 X 10,CD MECHA
Y09 645 025 2433 FIBER WASHER,FOR CD MECHA
Y11 645 016 5078 SCREW,CD SW BD
Y12 645 049 6288 SCR 3 X 8,EJECT GEAR HOLDER
Y13 645 025 2426 SCREW 3X12,PWR TRANS
Y14 645 018 3690 SCREW,FOR AC SKT
Y15 645 049 6271 SCR 2.6 X 10,MAIN PCB
Y18 645 049 6295 SCR 3 X 25,BOTTOM CAB
Y19 645 025 2402 SCREW 2X8,CD MECHA BKT
Y20 645 036 2644 SCR 3X8,ANT
Y21 645 018 0521 SCREW,SPK NET
Y22 645 025 2372 SCREW 3X8,SPK BOX
Y23 645 026 6218 SCREW 3X20,SPK BOX
- 7 -
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