Sony CFD-50 User manual

US Model
Canadian Model
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS (US model)
Full-range speakers:
With 3.2-ohm loads, both channels driven from
150-15,000 Hz: rated 2.3 W per channel mini-
mum RMS power, with no more than 10% total
harmonic distortion in AC operation.
OTHER SPECIFICATIONS
CD player section
System
Laser diode properties
Compact disc digital audio system
Material: GaAlAs
Wavelength 780 nm
Emission duration: Continuous
Laser output: less than 44.6 p.W
* This output is the value measured at a dis-
tance of about 200 mm from the objective
lens surface on the optical pick-up block.
20-—20,000 Hz +? dB
Below measurable limit
Frequency response
Wow and flutter
Tuner section
Frequency range FM: 87.6—108 MHz
AM: 530—1,710 kHz
Tape recorder section and general
Recording system 4-track 2-channel stereo
Frequency response 70 — 10,000 Hz
(with TYPE | (NORMAL) cassette)
Full-range speakers: 10 cm dia., cone type
Full-range speakers: 2.3W+2.3W (at 3.2 ohms,
315 Hz, 10% harmonic distortion)
Speaker
Power output
(Canadian mode!)
CD Section
Tape Section
Model Name Using
Similar Mechanism
Optical Device Name
MF-50RP-75D
Tape Transport Mechanism Type
Inputs Mixing microphone input jack (minijack)
Sensitivity 2.5 mV
For low impedance microphone
Outputs Headphones jack (stereo minijack)
For 16—68 ohms impedance headphones
120 V AC, 60 Hz
DC 9 V, 6 size D (R20) batteries
AC 25 W
Power requirements
Power consumption
Battery life Batteries for radio cassette-corder (hours)
[_SS*d;CF
Recording
[Playback
Sony SUM-1 (NS)
Sony Alkaline AM1 (N)
approx. 8
approx. 12
approx. 17
Dimensions 590 X 172 X 200 mm (w/h/d)
(23/4 X 67/, X 7/3 inches)
incl. projecting parts and controls
Weight Approx. 4.6 kg, incl. batteries
(Approx. 10 Ib 2 oz)
Supplied accessories AC power cord (1)
Design and specifications subject to change without notice.
CD RADI

CFD-50
SAFETY CHECK-OUT
After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:
Check the antenna terminals, metal trim, ‘‘metallized”’
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5mA (500 microampers). Leakage
current can be measured by any one of three
methods.
1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers’ instructions to use these instru-
ments.
2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The “limit” indication is 0.75 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)
To Exposed Metal
Parts on Set
AC
voltmeter
(0.75 V)
Earth Ground
Using an AC voltmeter to check AC leakage.
TABLE OF CONTENTS
Section
Title
Page
Specifications
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Safety
Check-out
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2
1.
SERVICING
NOTES
Notes on Handling the Optical Pickup
Block or Base Unit a 3
Notes on Laser Diode Emission Check -----+- 3
Chuck Plate Jig on Repairing --+++++++++eee- a
Laser Diode and Focus Search
Operation Check a 3
2.
GENERAL.
«222%
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cbse
smesysee
dunes
4
3.
DISASSEMBLY
..----.-----eecceeecceees
4
4. MECHANICAL ADJUSTMENTS
Tape Recorder Section -++++eeeeeeeeeeeeeee 6
5. ELECTRICAL ADJUSTMENTS
5-1. Tape Recorder Section --+++++err essere sees 7
5-2. Tuner Section Ostia pa, Bie: ele cone! Bete. e-e 8 eee ow wie eos Ss 8
5-3.
CD
Section
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9
6. DIAGRAMS
6-1.
CD
Section
Block
Diagram
-+++++++++++-+-+--
13
6-2.
Tuner,
Audio
Section
Block
Diagram
-+---++:-
1S
6-3.
Printed
Wiring
Boards
---+++-++++eee
eee
eeee
17
6-4. Tuner, Audio Section Schematic Diagram 2)
6-S.
CD
Section
Schematic
Diagram
-++++++++++-
25
7.
EXPLODED
VIEWS
.«.---------eseeeeeee
29
8. ELECTRICAL PARTS LIST .----------- 35
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK A\ OR DOTTED
LINE WITH MARK /\ ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB.
LISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE /\
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACER CES COM.
POSANTS QUE PAR DES PIECES SONY DONT LES
NUMEROS SONT DONNES DANS CE MANUEL OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

SECTION 1
CFD-50
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-
UP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may
suffer electrostatic breakdown because of the poten-
tial difference generated by the charged electrostatic
load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-
down and also use the procedure in the printed
matter which is included in the repair parts.
The flexible board is easily damaged and should be
handled with care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so
as to be focused on the disc reflective surface by the
objective lens in the optical pick-up block. There-
fore, when checking the laser diode emission, observe
more than 25 cm away from the objective lens.
Insert screwdriver and push S801.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid,
use Chuck Plate Jig.
@ Code number of Chuck Plate Jig: X-4918-255-1
LASER DIODE AND FOCUS SEARCH
OPERATION CHECK
1,
Der eae t Ae | ae
ai
Make Function switch to CD position with no disc
inserted.
Open the lid for CD.
Turn on S801 as following figure.
Press ® key.
Confirm the laser diode emission while observing the
objecting lens. When there is no emission, Auto Power
Control circuit or Optical Pick-up is broken.
Objective lens moves up and down once for the focus
serarch.
Yf.
~~
| AS S801
AL 27.
eee
yvilty,
pe a
laser diode

CFD-50
SECTION 2
GENERAL
e Parts Identification
Radio, Tape Section . CD Player Section
MIX MIC jack
OPRI/BATT indicator
Telescopic antenna
FUNCTION selector
Display window
PLAY MODE button
Disc holder
TONE control OPEN button
VOLUME cont
PHONES jack CD operation buttons
Cassette holder
Tape operation
buttons
-
ae
REMAIN/ENTER
button
indicator
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
DIAL POINTER SETTING
@ Set the center of the dial pointer
to the center of three points
on the sub chassis.
@ til gs pointer to the dial pointer
sub chassis
dial pointer
© Turn PVC gear fully
counter-clockwise with
the tuning knob.
tuner board
@ Insert the tuning knob
@ Turn the tuning knob in the order of frequency
MAX ~-> MIN and confirm the dial pointer
is not out of order.
s @ +BVIP3 X 12

CFD-50
FRONT CABINET
@
Open
cassette
holder.
@
CNJ302
@ front cabinet
© BVTP3 x 40
© BVTP3 x 40 j @ battery case lid
@
+BVTP3
X
12
TUNER
BOARD
@ +BVTP3 x 12
@ tuner board es,
MD SECTION
© CNJ21
@ CNJ306
CD MAIN BOARD
AUDIO BOARD
OSB Trs rik © CD main board
@ Remove two volume knobs. @ Slide out CD section
(VOLUME, TONE)
© +BVTP3 X 129
i
§ © +BVTP3 X 12
® audio board
POWER BOARD
@ +BVTP3 X 12
@ power board

CFD-50
SECTION 4
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened swab:
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagentizer.
(Do not bring the head demagnetizer close to the erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the parts
adjusted.
5. The adjustments should be performed with the rated power supply
voltage unless otherwise noted.
6. Power supply voltge: 9V dc.
Torque Measurement
22.5 — 55 gecm
Fast Forward and 60 — 120 g*cm
(0.83 1.67 ozrinchy | COMI
: 2 — Sgecm
(0.03 = 0.07 ozrinchy | | SO
Tape Tension Measurement
CQ-403A more than 150 g (5.29 02)
SECTION 5
ELECTRICAL ADJUSTMENTS
PRECAUTION
Adjustments should be performed in the order given.
Generally playback circuit adjustments should be completed before
performing recording circuit adjustments.
Adjustments should be performed for both L-ch and R-ch.
Switches and controls should be set as follows unless otherwise
specified.
Positions of switches and control knobs
TONE BO OOO ROHS ie: CLO OO 6 06 0168. O08 6.656 SOE 8) OS 8 ON Oe 0180 O88 are) maximum
Standard recording position
Adjust the VOLUME knob so that the following regulated
input/output signal levels are obtained.
Standard input level
[—__tput ind
Standard output level
[Output Pin [Speaker A)] PHONES
Output
signal
level
“0
cB
)
Wee
ie
0
dB=0.775
V

5-1. TAPE RECORDER SECTION
@ Test Tape
| Type | Signal =| Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
P-4-A063 6.3kHz, — 10 dB | head azimuth adjustment
REC/PB Head Azimuth Adjustment
Procedure:
1. Mode: playback
test tape
P-4-A063
(6.3kHz,
— 10dB)
PHONES jack
2. Turn the adjustment screw for the maximum output levels. If these
levels do not match, turn the adjustment screw until both of output
levels match together within 3 dB.
L-CH | ~
peak within
Output Zan i within
level 3d8
! }
!
I
|
R-CH
screw peak aie
osition
positi L-CH R-CH —* angle
peak peak
3. Phase Check
Mode: playback
test tape
P.4-A063
oscilloscope
(6.3kHiz, :
— 10d8)
320
PHONES jack ®C4
Screen pattern
O@®
QO
135° 180°
es
wrong
in phase 45° 90°
oceennmennteenmmeenen ammamenmemeeemenamnenendtl
good
Adjustment Location:
adjustment screw
| CFD-50
Tape Speed Adjustment
Procedure:
Mode: playback
speed checker
LFM-30
or
digital frequency
test tape counter
WS-48A
(3kHz, OdB)
PHONES jack
Adjustment Value:
Speed checker Digital frequency counter
— 2.5 to +1.0% 2,925 — 3,030 Hz
Frequency difference between the beginning and the end of the tape
should be within 1% (30 Hz).
Adjustment Location:
O
adjustment resistor

CFD-50 |
5-2. TUNER SECTION
[AM]
FUNCTION switch: AM
AM RF SSG
Put the lead-wire
antenna close to
we the set.
(QE aE
30% amplitude modulation
by 400 Hz signal
output level: as low as possible
[FM]
FUNCTION switch: FM
FM RF SSG
22.5 kHz frequency deviation
‘by 400 Hz signal
output level: as low as possible
to FM ANT IN
PHONES
@ Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on VITVM.
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VT VM.
520 kHz
1,780 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
600 kHz
1,500 kHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
. 86.5 MHz
109.5 MHz
FM VCO Adjustment
A) Regular Method
Procedure:
FM ff signal
generator
= po
Carrier frequency : 98MHz telescopic
Modulation: no modulation antenna lead
Output level: 0.1V (100dB)
Remove jumper wire as shown below.
Connect frequency counter to the positions shown below.
Tune the set to 98 MHz.
Adjust RV1 for 76 kHz + 500 Hz reading on the frequency counter.
After adjustment, connect jumper wire removed in step 1.
Remove jumper wire
Aaa Noe
frequency counter
nee) Bere
B) Simple Method
Procedure:
1. Tune the set to the FM stereo broadcasting signal.
2. Turn RV1 clockwise or counterclockwise and memorize the lighting-
up range of the FM STEREO lamp.
3. Secure RVI at the center of the lighting-up range of both turns as
shown below.
center of lighting-up ranges
lighting-up range
iO)
/
, N
N
ee
Sao
RVI
FM FREQUENCY
EMVvco COVERAGE
RV1 L2 cCT2
AM
TRACKING
11 CTi Li CT4 L4
AMIE CEM FREQUENCY
—38— TRACKING GovERAGE

5-3. CD SECTION
How to Put the Set into Service Mode
Notes on Adjustment
1. Perform adjustment in service mode.
After adjustment, be sure to release service mode.
2. Perform adjustments in the order given.
3. Use the disc (YEDS-18, Part No. 3-702-101-01) only when so
indicated.
1. Short-circuit following portions on the CD main board.
2. Tune the POWER on.
CD main board (conductor side)
: short-circuit
Before Adjustment
Put the set into service mode and perform the following checks. Repair if
there are any problems.
Le eS [ee |
e Sled Motor Check
1. Press ® key, then press I key.
Press PPI, Kd keys and confirm that the FOP moves smoothly
from the innermost to outermost circumference and back smoothly
and with no catching or abnormal noises.
pb] : FOP moves to the outer circumference
K4q : FOP moves to the inner circumference
@ Focus Search Check
Press > key. (Focus search operation is performed continuously.)
Look at the FOP objective lens and confirm that it moves up and
down smoothly, with no catching or abnormal noises.
3. Press Ml key.
Confirm that focus search operation stops. If it does not, press Il key
again longer.
N=
VCO Adjustment
Adjustment Procedure:
1.. Short-circuit @ portion CD main board.
2. Adjust with RV703 so that the reading on frequency counter
becomes 4.3218 MHz.
3. Release the short-circuit @ portion.
Adjustment Location: CD main board (conductor side)
frequency counter

E-F Balance Adjustment
This adjustment is to be done when the optical block is replaced.
Adjustment Procedure: :
Connect the oscilloscope between IC701 pins @ and @.
Put the set into service mode. (See page 9)
Press the PP] and k4q keys to move the FOP to the center.
Insert disc (YEDS-18) and press } key.
Adjust RV701 so that the oscilloscope traverse waveform is
symmetrical, as shown in the figure below.
Release service mode after adjustment is completed.
A
8
VOLT/DIV: 1V
TIME/OIV: Ims
Adjustment Location: CD main board (conductor side)
RV702 RV701
Focus Bias Adjustment
This adjustment is to be done when the optical block is replaced.
Adjustment Procedure:
Connect the oscilloscope between IC701 pins @ and @.
Put the set into service mode. (See page 9) __
Press the PP] and K¢q keys to move the FOP to the center.
(Move the FOP to the music area on the disc to enable easy
visibility of the eye pattern.)
Insert disc (YEDS-18) and press > key.
Adjust RV702 so that the oscilloscope waveform is as shown in
the figure below(eye pattern).
A good eye pattern means that the diamond shape (© ) in the
center of the waveform can be clearly distinguished.
Release service mode after adjustment is completed.
RF signal reference waveform (eye pattern)
\RXANA i
Wie i
\\
VOLT/OIV : 0.2V
TIME/OIV : 500ns
0.8 — 1.5 Vp-p
Hii
MA
Way
Wy
ov
When observing the eye patern, set the oscilloscope for AC
range and raise vertical sensitivity.
E-F Balance Adjustment
oscilloscope
(DC range)
ES Focus Bias Adjustment
+
oscilloscope
(DC range)

REFERENCE
Focus/Tracking Gain Adjustment
A frequency response analyzer is necessary in
order to perform this adjustment exactly.
However, this gain has a margin, so even if it is
slightly off, there is no problem. Therefore, do not
perform this adjustment.
Focus/tracking gain determines the pick-up follow-
up (vertical and horizontal) relative to mechanical
noise and mechanical shock when the 2-axis device
operate,
However, as these reciprocate, the adjustment is at
the point where both are satisfied.
@ When gain is raised, the noise when the 2-axis
device operates increases.
@ When gain is lowered, it is more susceptible to
mechanical shock and skipping occurs more easily.
@ When gain adjustment is off, the symptoms below
appear.
low or high
@ The time until music starts
becomes longer for STOP
=P PLAY or automatic
selection (Hed PR buttons
pressed. (Normally takes
about 2 seconds.)
e Music does not start and
disc continues to rotate
for STOP => PLAY or
automatic selection (Hed
bi buttons pressed.)
e Sound is interrupted dur-
ing PLAY. Or time count-
er display stops progress-
ing.
e More poise during 2-axis
device operation.
The following is a simple adjustment method.
— Simple Adjustment —
Note: Since exact adjustment cannot be performed, remem-
ber the positions of the controls before performing the
adjustment. If the positions after the simple adjust-
ment are only a little different, return the controls to
the original position.
Procedure:
1. Keep the set horizontal.
If the set is not horizontal, this adjustment
cannot be performed due to the gravity against
the 2 axis device.
2. Insert disc (YEDS-18) and press ®» PLAY button.
3. Connect the oscilloscope between IC701 pins 62)
and 6) .
4. Adjustment RV705 so that the waveform is as
shown in the figure below. (focus gain adjustment)
@ Incorrent Examples (DC level changes more than
on adjusted waveform)
low focus gain
—-OV
VOLT/DIV:
TIME/DIV: 2mS
VOLT/DIV:
TIME/DIV: 2mS
— 250mvVv
700 mV
100 mV
VOLT/DIV: 100 mv
TIME/DIV: 2mS
5. Connect the oscilloscope between IC701 pins @)
and 26) :
6. Adjust RV704 so that the waveform is as shown in
the figure below. (tracking gain adjustment)
VOLT/DIV: 1V
TIME/DIV: 2ms
OV
@ Incorrect Examples (fundamental wave appears)
low tracking gain
VOLT/DIV: 1V
TIME/DIV: 2mS
— OV
high tracking gain
(higher fundamental wave than for low gain)
VOLT/DIV: 1V
TIME/DIV: 2mS
— Ov
Adjustment Location: CD main board (conductor side) Remove the solder bridge while -
adjusting the tracking gain.
(After adjustment make the
solder bridge.)
oscilloscope
(DC range)
Remove the solder bridge while
adjusting the focus gain.
—— (After adjustment make the
solder bridge.)
RV705
1C701 pin @
1C701 pin @
IC701 pin @
RV704

SECTION 6
DIAGRAMS
6-1.
CD
SECTION
BLOCK
DIAGRAM
XF701
C2F2
OPTICAL PICK-UP
O
Seess
aa
BLOCK
{C707
1c706
cco
5
CHES)
D/A
CONVERTER
LPF
i
wu
No
oOo
i
| TO
@ RADIO BLOCK
v
r
Q x
x r
1c703
CO OIGITAL
SIGNAL PROCESSOR Lt u
| y AUDIO MUTE DE~EMPHASIS
: . Q702. 712 Q703. 713
O :
Le ee ee
|
I
|
|
i
i
|
{
I
I
|
l
|
I
|
I
RV7O4
ar AUDIO MUTE DRIVE PEN EMPHASIS DRIVE
BALANCE
Q@704,
705
Q741.
714
DAOS - DADA
( 28-32, 34-37) 34-37
LASER POWER
CONTROL
LD
O
@ —
O
a
x
~ $601
OPEN/CLOSE
O
©
ssogs
REMAIN/ nara BEr
- Re nee al
PLAY MODE oO
+
O
aig a es ee ee
colt '.
Se eae eee eae i ee
{c708
1c802 FOCUS, TRACKING COIL
FILTER ORIVE
| 88
FS
9 9
z
ees oe i aie poet pa cS
tcso1
O-
SYSTEM
CONTROL
1+(6)
sabe
@
(6)
MUTE
$806
1c708
paras Sane
3.
10702
SLED.
SPINDLE
MOTOR
CD SYSTEM DRIVE
SERVO PROCESSOR
Ane
of
SYSTEM
RESET
@ ore ©
SWITCH
pa ae
to ae
REC
ee (18) REC
REG
+ +
CO +8 e706 SV
() M702
SPINDLE
O v S802
© LIMIT
FROM
RADIO BLOCK
G0) P CON
LCD1
eal
FS
ae
—14—

6-2. TUNER, AUDIO SECTION BLOCK DIAGRAM
ANT!
FM
TELESCOPIC
ANTENNA
\
FL14
FM/AM FRONT-END.
IF, DEMODE
Rv1 G)vco
FM VCO
L
FROM A
CD BLOCK R
J301 |
MIX MIC
$302
RECORD/PLAYBACK
PLAYBACK = RECORD
HRP601
RECORD/PLAYBACK
HEAD
HEGO1
ERASE X
HEAD
SEL
DET LPF
SP802
R
$301
[FUNCTION |
TAPE — AM —+ FM — CD
L DRIVE
Q102
(ste REO
—15—
MIC AMP
Q301, 302
$302-1
nee |
$301-1
$601 [FUNCTION ]
MOTOR TAPE > AM > FM > CD
REC SWITCH
Q307
J302
PHONES
MUTING
Q101
1c302
POWER AMP
lavso1-2 ee
vai
0901-904
RECT
+B+5V
Vcc +9V ~t—
BIAS CONTROL
SWITCHING SWITCH
Q308 Q304, 0304
oe ee,
: DRY BATTERY
'
M601
0307
+
SIZe
“p"
REEL/Y 6PCS, 9V
epee (OPR/BATT) a
=
Q306 me
CD BLOCK
REC
i
—1 6—

|
23
20
19
19
14
‘11
10
PRINTED WIRING BOARDS
6-3.
24. | 5
TELESCOPIC
ANTENNA
{TUNER BOARD }
UP BLOCK
-210B)
OPTICAL PICK-
(KSS
ae
SRE,
[CD CONTROL BOARD] (COMPONENT SIDE)
D MAIN
BOARD
[‘
ROD ANTENNA
FERRITE
wr
Se
<
SRR
RNARRRRSE
RODE
RRR
eR
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See
ERR
RR
AREER
RIE
CNJ2I
6PCS 9V
{EC DESIGNATION
R20
“7 DRY BATTERY
SIZE "D"
*
{POWER BOARD]
CNJ 702
(AUDIO BOARD)
x“ rs) 4
o
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HEAD
{CD MOTOR BOARD]
a
Se
SENN
YIP
SEIS
SE
SETH
:
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LRN
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—
CNJ 713
gunn
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ROR
ONSET
TA
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SE
ARETE
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SET
SS
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TSN
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STATA
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{MD BOARD]
ee ee
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SATS
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PI
SST
NEESER
ATEN
SSE
SSNS
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SSN
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ANE
SEE
[CD LEAF SW BOARD]
Parts extracted from the component side
f
2 rer] is0]
9g ° pa
2]
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a
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SSR
Pp
REA
TRATES
3
Se
S
pS
ESI npn RESORT
CNJ 705
M60
REEL /CAPSTAN
(R-CH)
SPEAKER SPEAKER
(L~CH)
3302
PHONES
D307
OPR/BATT
—138—
e
Circuit
Boards
Location
CD leaf switch board
power board
CD motor board
OPTICAL PICK UP
board
CD main board
audio board
MD board
tuner board
—20—

6-4. TUNER, AUDIO SECTION SCHEMATIC DIAGRAM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
e ic i
.
Block
Diagram
1C1 CXA1238S
ANT!
B
nega
=
-
_
-
+
-
—_
-
—_
-
__
-—__-
!
(TUNER
BOARD]
|
Paarroweo
;
hy
AY —
3 =
2
“
<5,
to
een
FM
IF/
° = 2 a vco ’ ISCRI.
3 s a _ aii
Cc
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>
8
SLR-34VR
-
5 8 8 FM STEREO
I FM/AM FRONT-END, o ° [ FM STEREO | ry coun eR oO <| pe
-OEMODE st TCU 1/2
COUNTER (°02) TUNING
La INDIC ATOR
BAND PASS
MUTE
FE QUT NO RF IN FM RF AFC ; AM OSCMUTE FM ®ISCRI MPX REG GNB
ee 1.25V vco PLL LPF
D 1 BAND IF, DET U VGQ CHECK _LP |
| SELECT AM IF IN FM IF IN TUNING GND AGC: AFC St oN P tor DET PLL LPF
]
|
Note
on
Schematic
Diagram:
e@ All capacitors are in uF unless otherwise noted. pF: MMF
7
SOWV
or
fess
are
not
indicated
except
for
electrolytics
and tantalums.
® All resistors are in 2 and '/,W or less unless otherwise
specified.
I e fF : fusible resistor.
© F I : adjustment for repair.
Voltage and waveforms are dc with respect te ground
FE
under
nosignal
(detuned)
conditions.
Radio section
no mark: FM
Ooo Tr Ce I OF
[AUDIO
BOARD]
KH301
,9]
®
te
Tape
section.
<a
no
mark:
PLAY
‘
it)
ee
ee
(
):
REC
G
s&
Q301,
302
FUNCTION
CD
section
eA
MIC
AMP
FM:
a
no
mark:
STOP
Q30!
(
):
PLAY
25C1740S-S
5
pterses
@
Voltages
are
taken
with
a
VOM
(10
MQ/V).
.
4
SWITCHING
Voltage
variations
may
be
noted
due
to
normal
produc-
i
Lo
4
=
=
ee
>
>
>
-
(LAM
R222 12k
R122 12k
anS+
3. ] tion tolerances,
uo.
CNP30S e Waveforms are taken with a oscilloscope.
L304 ¢
baw Lo
GHA Se
|
i
R331 4.7k
R123 2, 2k
| Ri27 15k Ri25 12k
a
mo
uo
R226 15k R124 i5k
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<
1
: <
ix) eg
0
\
Lz Fol L OCH Voltage variations may be noted due ta normal produc-
tion tolerances.
’
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path.
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TO CD MAIN BOARD >: REC
; CN705 22» re
R225 12k Z> :CD
CE 04 R CH
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$313
@ Semiconductor Lead Layouts R227 15k
C339
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|
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|
ff
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o
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|
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1 10301 BA3312N > =s ot te af] spgo1 L CH ted line with mark pour la sécurité.
10302 LA4597 SPEAKER are critical for safety. Ne les remplacer que par une
XSx
(1/2)
Replace
only
with
part
|
piéce
portant
le
numéro
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—
———_——e————
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~21— —22— —23-— —24—

6-5. CD SECTION SCHEMATIC DIAGRAM e See page 24 for Notes.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
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NOTE:
No.
PWN
ONO
The mechanical parts with no reference
number in the exploded views are not
supplied.
The construction parts of an assembled
part are indicated with a collation num-
ber in the remark column.
Items marked “*"’ are not stocked since
they are seldom required for routine
service. Some delay should be antici-
pated when ordering these items.
SECTION 7
EXPLODED VIEWS
@ Due to standardization, parts with part
number suffix -XX and -X may be dif-
ferent from the parts specified in the
components used on the set.
Color Indication of Appearance Parts
Example:
(RED) ...KNOB, BALANCE (WHITE)
+
t
Cabinet's Color Parts’ Color
(1) FRONT PANEL AND TUNER BOARD SECTION
CFD-50
The components
mark
identified by
or dotted line with mark
are critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque sont critiques pour la
sécurité.
Ne les remplacer que par une
piece portant ie numéro spécifé.
Part No. Description Remarks No. Part No.
X-4936-001-1 CASSETTE HOLDER ASSY 9 = 3-351-377-11
X-4936-002-1 FRONT CABINET ASSY 10 3-343-067-01
*3-703-150-11 STOPPER, WIRING N 4-936-011-01
7-685-648-79 SCREW +BVTP 3X12 TYPE2 IT-3 12 *4-936-009-01
13. 7-621-770-87
7-685-155-19 SCREW +BTP 3X40 TYPE2 N-S
3-343-064-31 LID, BATTERY CASE 902 *A-3266-596-A
4-936-010-01 GEAR (PVC) SP801_ 1-544-154-11
4-936~-012-01 KNOB (TUNING) SP802 1-544-154-11
Description
DAMPER
SPRING (CASSETTE)
POINTER
CHASSIS, SUB
SCREW +P 2.6X5
MOUNTED PCB, TUNER
SPEAKER
SPEAKER
Remarks

CFD-50
(2) CD SECTION
Part No.
7-621 ~-770-XX
*4-936-022-01
4-936-029-01
*4-93] -787-01
4-936-019-01
4-936-033-01
7-621-772-10
3-704-435-01
7~685-646-79
4-936-007-01
X-4936-003-1
4~-936-028-01
4-936-020-01
4-936-038-01
3-351 -377-11
Description
SCREW +PTT 2.6X8
BRACKET (LCD)
BUTTON (CD)
COVER, DUST
BUTTON (EJECT)
(S)
CABINET (CD)
SCREW +B 2X4
PLATE (M), CHUCK
SCREW +P 3X8 TYPE2 NON-SLIT
COVER
CD HOLDER ASSY
SPRING (CD)
SLIDER
SPRING (EJECT)
DAMPER
Remarks
2R2O=
Part No.
7-685-648-79
4-922-858-01
4-931 -373-01
4-922-858-11
4-93] -358-01
*4~928-936-01
7~-685-104~-19
*4-936-039~-01
*4-930-246-1)
*A-3216~-974-A
*1 -632-756-11
*] -632-757-11
*] -632-758-11
1-452-531-11
1-808-930-1]
1-570-822-11
1-571-936-11
Description
Remarks
SCREW +BVTP 3X12 TYPE2 IT-3
DAMPER (BROWN)
SCREW, CD FITTING
DAMPER (BLUE)
SPRING
COVER, CD
SCREW +P 2X6 TYPE2 NON~-SLIT
BRACKET (BUTTON)
PAPER (N), SHIELD
PC BOARD ASSY, MAIN, CD
PC BOARD, CD CONTROL
PC BOARD, CD MOTOR
PC BOARD, CD LEAF SW
MAGNET
DISPLAY PANEL, LIQUID CRYSTAL
SWITCH, LEAF (OPEN/CLOSE)
SWITCH, LEAF (LIMIT)

(3) REAR CABINET SECTION
No.
101
102
103
104
105
106
107
108
110
W
We
113
114
115
116
Part No.
7-685 -648-79
*4-936~-021-01
4-936-018-01
4-936-017-01
4-936-01 6-01
4-936-015-01
4-936-014-01
4~936-013-01
*4-937-032-01
4-936-032-01
4-936-032-01
3-351 -338-31
4-936-008-01
4-936-030-01
7-621 -853-30
3~343-070-01
FH901
Description
FH902
SCREW +BVTP 3X12 TYPE2 IT-3
LEVER, REC
BUTTON (STOP)
BUTTON (REC)
BUTTON (PLAY)
BUTTON (REW)
BUTTON (FF)
BUTTON (PAUSE)
BRACKET
(US )iicit ace 2s CABINET (REAR)
(Canadian)...CABINET (REAR)
KNOB (VOL)
PLATE, SIDE, HANDLE
HANDLE
SCREW +KTP 3X12 TYPE4
SPRING (+,~-)
Remarks
No.
17
118
119
120
121
122
123
124
903
904
905
ANT]
Note:
The components identi-
fied by mark
ted line with mark
are critical for safety.
Replace only with part
number specified.
Part No.
7-682-549-09
4-936-025-01
3-343-062-3)
4-936-024-01
4-936-023-01
7-621 -773-86
7-685-134-19
7-685-870-01
*A-3270-709-A
*A-3270-733-A
*] ~632-749-11
*} -632-750-11
}~501-467-11
F901 A.1-532-745-11
1C302 8-759-820-22
T901 A.1~-449-897-11
FH9O1
FH902
eso i ee
1-533-217-31
1-533-217-31
or dot-
CFD-50
Note:
Les composants identifiés par
une marque sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro spéci-
fié.
Description Remarks
SCREW +B 3X10
TERMINAL, ANT
KNOB (FUNCTION)
SPRING (-)
TERMINAL (+), BATTERY
SCREW +BVTT 2.6X4 (S)
SCREW (+ PTPWH) (2.6X8)
SCREW +BVTT 3X5 (S)
(US) 65¢ eee oS MOUNTED PCB, AUDIO
(Canadian)...MOUNTED PCB, AUDIO
PC BOARD, MD
PC BOARD, POWER
ANTENNA, TELESCOPIC
FUSE, GLASS TUBE
IC LA4597
TRANSFORMER, POWER
HOLDER, FUSE
HOLDER, FUSE

CFD-50 |
‘No.
201
202
203
205
207
208
211
Note:
The components identi-
fied by mark
(4) OPTICAL PICK-UP BLOCK
(KSM-210BAN)
. Part No.
2-641 -403-05
2-64) -404-02
3-303-809-31
*2-64) -434-0]
*4-910-431-01
2-641 -444-01
7-621 -255~25
| ted line with mark
are critical for safety.
Replace only with part
number specified.
or dot-
M701
Description Remarks
GEAR (B)
GEAR (A)
SCREW (M1.7X3.0), SPECIAL HEAD
COVER, GEAR
SHAFT, SLIDE
HOLDER (J), CHASSIS
SCREW +P 2X4
Note:
Les composants identifiés par
une marque A\ sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro spéci-
fié.
No. Part No.
213 7-621-255-45
214 2-641 -447-01
215 2-64) -448-02
915 A.8-848-137-11
M701 = X-2641-357-1
M702 = X-2641-341-1
Description
Remarks
SCREW +PTT 2X6 (S)
SCREW (2.6X8), + STP
CLAMP, SHAFT
DEVICE, OPTICAL KSS-210B
MOTOR ASSY, SLED
MOTOR ASSY, SPINDLE
(WITH CHASSIS, TURNTABLE }