Sanyo MCD-S660F User manual

Service Manual
Specifications
(CASSETTE SECTION )
Recording system . . . .
Erasing system ......
Tape speed .........
Fast forward and
rewind time .........
Frequency response . .
(CD SECTION )
Channels ...........
SIN ratio ...........
Wow&Flutter .......
Sampling frequency . . .
Quantization .........
Pick-up light source . . .
Pick-up wave length ...
Laser output .........
,.
CD Portable
Stereo Radio
Cassette Recorder
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FILE NO.
MCD-s660F (AU)
PRODUCT CODE No.
142 961 02
(RADIO SECTION )
AC bias, 4track stereo Tuning ranges . . . . . . . FM :88-108 MHz
Magnet erase AM :525-1,710 kHz
4.75 cm Isec. Antennas ........... Built-in ferrite bar and
telescopic rod antennas
110 sec. (C-60 tape)
80- 12,000 Hz (Normal tape) (GENERAL)
2channels
70 dB
undetectable
44.1 kHz
16 bits linear /ch
Semi-conductor laser
790 nm
Continuous wave max.
0.6 mW
Specifications subject to change without notice.
.,.,
...
Output power . . . . . . . . 4.0 Wx2(DC max.)
Speaker . . . . . . . . . . . . 12cmx2,40hms
PIEZO X2
Terminal impedance . . PHONES :32 ohms
MIC :200-600 ohms/mV
Power source ........ AC :230-240 V, 50 HZ
DC: 12V
(8x“D “size batteries )
Dimensions . . . . . . . . . 541( W)x275(H)x215(D)mm
Weight . . . . . . . . . . . . . Approx. 6.0 kg including batteries
REFERENCE No. SfV1580348

.
LASER BEAM SAFETY PRECAUTIONS .....-
.Pick-up that emits alaser beam is used in this CD player.
-J
CAUTION :
USE OF CONTROLS OR ADJUSTMENTS
OR PERFORMANCE OF PROCEDURES on
OTHER THAN THOSE SPECIFIED o0-
HEREIN MAY RESULT IN HAZARDOUS *n.4
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A~D EKPOSURElU BEAM.
AovARsEL-usvNuGLASERsRAuNG VEDAGNING,
I@ SIKKERHEDSAFBNYDEREERUDEAFFUNKTION.
UNOGAUOSEITELSE FORSTRALING.
VARNING-O.SVNLIGIASERSTtiLNINGNAR
OENNAOE~ARtIPPHAOOCHSPARRARURKOPPLAD.
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‘REMOVAL AND INSTALLATION
●I)iscorinectthe power cord’s plug from the electrical OUtk?t.
.All wiring should be returned to the original position after work is complet
.First have ready many the new FIXERS (614 129 4971) for replacement.
●Arrange the lead wires so that they are not near the heat sink.
a. CABINET
(1) Remove the battery lid.
(2) Remove the 6rear cabinet mounting screws.(@)
(3) Remove the VOLUME &TONE control knob.(@)
(4) Press the STOP/EJEC,T button.
(5) Open the cassette compartment lid. (@)
b. CD TOP LID
>1 I
MC-grease
EM-50L
1
●Mount the spring wire, attaching parts @, @,
and 0in sequence.
A“...
—
Before attaching the cabinet, secure the buttons of the
tape deck in place using adhesive tape.
c. CHUCK PULLEY
●
-1-
CHUCK.PULLEY
To remove the chuck rxdlev, r)ush in the direction
indicated by the arrows (@j “and pull out (@)
(to prevent hook from breaking off).

ii
..
...-.
.....
...-
J
.. .
REMOVAL AND INSTALLATION
d. WIRING LAYOUT
(a) TAPE MECHANISM
(b) REAR CABINET
LEAD
●Arrange the lead wires as shown illustration. II
RoOANTENNA
r
BATTERYTERMINAL P.C.B
HOOK
I
e. MOUNTING, POINTER
.,’.’
.: ... .
..
‘$ MC-grease
Qi! I1
MC-grease
EM-SOL -2
VIEW-@
f. “O” POINT ADJUSTMENT
/d@

i
TUNER ADJUSTMENTS -.,...
.Use aplastic screw driver for adjustments.
●Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter.
Supply voltage :DC12.OV
Phones impedance :32 ohm
Standard output :0.5 mW (126 mV)
Function switch :RADIO
PARTS LOCATION
a. Al
E
Step
1
2
3
4
5
6
ADJUSTMENT BAND SELECT SWITCH :
Adjusting Connections
Circuit Input output
Closed the output Connect sweep
Itemninai by sweep Igenerator to
IF Igenerator, it place IC2106 (H) &
to L2103. J2101 (G)
I I
Tuning IConnect AM SG IConnect VTVM to
coverage /to Test Loop Ispeaker terminals
(n)
c= 1000P SIGNAL ENERATOR
L=
Gi5i
3l;~16 ~2103 “2’2018 r
002001
mlMm
/,\
“MIF IN vCT-l@ vCT- 3
NO) ~1 @@l
‘2’02 0VCT-2 @vff-~ ❑L2104
m
4
1C201
XF213
FM?Fp/:(H) ~G~;j4 IF OUT
AM/FM IF OU;Z0c210&01
Connect AM SG Connect VTVM to
Tracking to Test Loop speaker terminals
.J
-“.’.
AM 1I1 1
VTVM
SG Frequency Position of tuning dial Adjustment Oscilloscope
—
455 kHz Low XF213 4,
517k Hz Low end L2104
I I Max. I
1750k Hz High end VCT-4
I I I
600 kHz 600 kHz L2103
I I I Max. I
1400 kHz 1400 kHz VCT -3
?eDeat adjustments I
b. FM ADJUSTI
Adjusting
Step Circuit
K
1IF
2Tuning
3coverage
4Tracking
ENT BAND SELECT SWITCH :FM FM Dummy antenna :75 ohm
1
Connections
iSG Frequency IPosition of tuning dial IAdjustment
Input output I
Connect sweep Connect sweep
generator to Igenerator to
IC201 @(H) C2106 (H) I10.7 MHz ILow I---
&D2001 (G) &J2101 (G) I
Connect FM SG Connect VTVM to 87.0 MHz Low end L2102
toTPl (H) &TP2 (G) speaker terminals 109.0 MHz High end VCT-2
Connect FM SG Connect VTVM to
toTPl (H) &TP2 (G) speaker terminals 98.0 MHz 98.0 MHz VCT-1
unbalance
=
A
--i
Max.
Max. I
[5Repeat adjustments
-3-

TAPE DECK
.. ,....
a. HEAD REPLACEMENT AND HEAD AZIMUTH ADJUSTMENT
(a) Head replacement
●After replacement, demagnetize the heads by using adegausser.
●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.
(b) Head azimuth adjustment
(1)
(2)
(3)
(4)
(5)
-. -.
..
Load the test tape (VTT-703, etc., 10 kHz )for
azimuth adjustment.
Press the PLAY button.
Use across-tip screwdriver to turn the screw for
azimuth adjustment
so that the left and right output are maximized.
Press the the STOP button.
After completion of the adjustment, use thread lock
(TB-1401B )to
secure the azimuth-adjustment screw.
b. MOTOR REPLACEMENT
(a) Motor replacement
AND SPEED ADJUSTMENT
(b) Motor speed adjustment
(1) Insert the test tape (MTT-11 lN, etc., 3000 Hz).
(2) Press the PLAY button.
(3) Use aflat-tip screwdriver to turn the SVR (located inside the rear
of the motor) to adjust SVR so that the frequency counter
becomes 3,000 Hz.
d
RIP HEAD “--’
LOW
WHiTE
m
~MOTOR SPEED ADJUST
oJ
il
BACK SIDE OF SET
c. CHECKING THE MECHANISM TORQUES AND TENSION
.Clean the head, capstan and pinch roller before making any measurement.
Measurement Take-up torque Back tension Tape tension
Cassette for PLAY:TW-211 1A Drive-power cassette
PLAY: TW-21 11A
measurement F.FWD/REW:TW-2231 TW-2412
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
... ...

i
.
CD PLAYER ADJUSTMENTS .+,...
a. DISASSEMBLYOFTHE CD PLAYER MECHANISM
(a)
●
Replacement of the spindle motor
First, prepare the new turntable (Ml -2 )and new special
washer (Ml -4 )for replacement.
The removed turntable will be deformed by the heat of the
soldering iron, and cannot be reused.
●Prepare dial type calipers.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
I
(b)
(1)
(2)
(3)
(4)
(5)
(6)
The attached bonding material can be dissolved by using a
60W soldering iron to heat the shaft at the top part of the
turntable (Ml-2 )for about one minute.
The turntable can then be removed from the shafl by very
carefully applying force upward at the center of the lower
surface of the turntable.
Remove the two screws (Ml-3 )and remove the spindle
motor (Ml-5 ).
Attach the special washer (Ml-4 )to the spindle motor.
Apply asmall amount of amixture of the “Th~ee Bond 2001”
and “201 5F” bonding materials to the motor’s shaft.
Install the turntable as shown in the figure.
Secure the turntable by pressing gently.
Be sure to wipe away (by using apiece of cloth, or similar
material )any bonding material coming out of the hole.
Replacement and lubrication of the pick-up
Before replacement of the pick-up, be sure to carefully read
the section regarding the pick-up when the unit is moved or
transported.
Remove the two pick-up rail (Ml 2)with care fixing the two
latch with any way driver from bottom of chassis
(Ml-1 ).
If the pick-up is reconditioned or replaced, be sure to wipe
the rails clean and also apply acoating of FLOIL (G-474B )to
their entire circumference and entire length.
After replacement, install the shaft as before.
The pick-up P.C.Board pattern is “shorted”, as shown in the
figure ,so that the new pick-up will not be susceptible to the
effects of static.
Set the pattern to “open” after the pick-up has been
replaced,
SHORT
-5-
1
[3
“e
~-. .-
—Ml-5
Don’t attached bonding material
at the top of shaft.
Bonding material
8-’””/”++
Ml-4 (SPECIAL WASHER) ““
Ml-1 (CHASSIS)
Be sure to wipe away the
bonding matearial \CHUCK PULLEY
I
w
-——
17.?5mm
.- *O.lmm
—
L
—-
M12
II(S=FT) \
M1-5(SPINDLE
II ‘*-i---i?
MOTOR SHAFT)
M6
M12

.......
CD PLAyEf? ADJUSTMENTS
(BE SURE, AT THIS TIME, NOT
TO TOUCH ANY OTHER PART. )
em ‘@ ‘-d
(c)
(1)
(d)
(1)
(2)
(3)
(f)
(5)
(6)
(7)
(e)
(1)
(2)
(/L/
Sled motor replacement
See illustration at right.
+%h
Checking the operation of the CD mechanism
Disconnect the socket (for the sled motor power supply) from
the printed-circuit board. Ml-1
Apply avoltage of DC 2.0 Vto the sled motor’s
terminal.
Measure the current during sled motor operation.
●The direction of movement of the pick-up (outer groove or
inner groove) can changed by changing the battery polarity.
The current during sled motor operation varies .- .-
according to the positional relationship of gears
(M8 and M9 ). -,.
*
If the current exceeds 40 mA ,remove the Direction of pick-up movement Sled motor current
pipe (M7 )and gears (M8, M9 ).
Apply asmall amount of aFLOIL (G-474B )bonding Outer groove 40 mA or less
materials to the chassis shafts.
Install the pipe and gears as shown in the illustration. Inner groove 40 mA or less
M,8 M8 o@
Resetting the pick-up to the home position
The limit switch is switched ON by the projection of the rack
gear secured to the returned pick-up, after which the sled”
motor continues to operate (by the circuit) for approximately
20- 30 milliseconds ;there is then again areverse
operation, and movement to the position at which the switch
is switched OFF.
Rotation continues for about 20 -30 milliseconds after the
switch is switched OFF, and then the pick-up stop at home
position.
..
-6-
&
00
LIMIT ~
SWITCH
G)
*
@@
+- PICK-UP
-..“.
... . .
. . .
.....
:., .
.......
1

CD PLAYER ADJUSTMENTS ....-
b. PREPARATIONS
(a) Measuring instruments, tools and filter -#
(1) Test disc.: YEDS18(SONY)or etc.
(2) oscilloscope: SS5711 (l OMHzor dual-phenomenon)
or Memory scope :DSS6521 (Storagescope)
(3) Screwdrivers (non-metallic) for adjustments
(4) Low Pass Filter (L. P. F.)
(5) Resistor, Carbon 2.2 Kohm, l/4W .—
c. PARTS LOCATION
r)
L- 0
I-J 1:1
l_l l_l
CD MAIN P.C.B
e‘1:”:1%c~33~:
o“;
‘Oscillosco
EYE PATTERN
Adjustment Measuring Short-circuit Input
Item instrument location onnection
(a) Tracking Oscilloscope
balance L.P.F. lJl::w -
(b) Checking
the “eye” Oscilloscope –—
pattern I
1I-~
TRACKING BALANCE
output djustment
connection location Adjustment value
TP 101 :TE SVR101 Waveform symmetry
TP102:VC A=B l. EJVp-p
ICIO1 (pin 72) Check be sure that the “eye”
:RF —pattern is at the center of the
TP 102 :VC waveform and that the dia-
mond shape is clearly defined
,.. .
-7-

.-- ..,.
CD PLAYER ADJUSTMENTS
d. ADJUSTMENTS
(a) TracKng balance adjustment
(1) Pull the CD block out from the unit body and wire
it to the CD main P.C.board test pint. &‘“
. ..
.“. -.
.. (2)
I
(3)
(4)
(5)
(6)
(7)
(8)
(9)
.-,-.
.-.
‘i,
I1
Short-circuit points (JI 137 and J1 138) on the printed-
circuit board.
Connect an oscilloscope to TP101 (TE) and TP102 (VC).
Push the CD block back into the unit body.
Switch ON the POWER.
(Connect the power cord plug from the electrical outlet.)
Cancel the short-circuiting of short-circuit point
(Jl 137 and J1 138) on the printed-circuit board.
Set the test disc. &
PLAY switch push ON.
Adjust SVR101 so that the oscilloscope’s waveform is
symmetrical, as shown in the illustration.
(1O)Switch OFF the POWER.
(Disconnect the power cord plug from the electrical
outlet.)
Switch ON the DC power.
Connect an oscilloscope to IC101 (pin 72)
and TP102 (VC)-
Load the test disc.
PLAY switch push ON.
(b) Checking the eye pattern
(1)
(2)
(3)
(4)
(5) Check to be sure that the “eye “pattern is at the center
of waveform and that the diamond shape is clearly
defined.
(6) Press the STOP button.
(7) Switch OFF the DC power.
-8-
L.P. F.
TP 101
(TE)
TP 102
(Vc) ‘‘El
+
irqOUT OSCILLOSCOPE
-1
“’%’)-
D

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iii
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EXPLODED VIEW (CABINET &CHASSIS ).... -
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