Sony CFD-G550CP User manual

1
SERVICE MANUAL
CFD-G550CP
CD RADIO CASSETTE-CORDER
CD player section
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wave length: 780 nm
Emission duration: Continuous
Laser output: Less than 44.6 µW
(This output is the value measured at a distance of
about 200 mm from the objective lens surface on the
optical pick-up block with 7 mm aperture.)
Spindle speed
200 r/min (rpm) to 500 r/min (rpm) (CLV)
Number of channels
2
Frequency response
20 - 20 000 Hz +1/–2 dB
Wow and flutter
Below measurable limit
Radio section
Frequency range
Mexican model
FM 87.5 - 108 MHz
AM 530 - 1 710 kHz
Other models
FM 87.5 - 108 MHz
AM 531 - 1 611 kHz (9 kHz step)
530 - 1 610 kHz (10 kHz step)
Antennas
FM: Telescopic antenna
AM: Built-in ferrite bar antenna
SPECIFICATIONS
Cassette-corder section
Recording system
4-track 2 channel stereo
Fast winding time
Approx. 120 s (sec.) with Sony cassette C-60
Frequency response
TYPE I (normal): 70 - 13 000 Hz
General
Speaker
Full range: 10 cm dia., 3.2 Ω, cone type (2)
Woofer: 10 cm (4 in.) dia., 4 Ω, cone type (1)
Outputs
Headphones jack (stereo minijack)
For 16 - 68 Ωimpedance headphones
Power output
4 W + 4W (at 3.2 Ω, 10% harmonic distortion
in DC operation)
Woofer:
12 W (at 4 Ω, 10 % harmonic distortion in DC
operation)
Ver 1.0 2004. 07
9-879-113-01
2004G04-1
© 2004. 07
E Model
CD Model Name Using Similar Mechanism CFD-G500
Section CD Mechanism Type KSM-213RDP
Optical Pick-up Name KSS-213R
TC Model Name Using Similar Mechanism CFD-G500
Section Tape Transport Mechanism Type MF-G500
– Continued on next page –
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation

2
CFD-G550CP
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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 PUBLISHED BY SONY.
CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270˚C during
repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
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 potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
•Abbreviation
E41 : AC 230V area in E model
MX : Mexican model
Power requirements
For CD radio cassette-corder:
MX model:
120 V AC, 60 Hz
E41 model:
230 V AC, 50 Hz
12 V DC, 8 size D (R20) batteries
For remote control:
3 V DC, 2 size AAA (R03) batteries
Power consumption
AC 30 W
Battery life
For CD radio cassette-corder:
FM recording
Sony R20P: approx. 6 h
Sony alkaline LR20: approx. 18 h
Tape playback
Sony R20P: approx. 1.5 h
Sony alkaline LR20: approx. 6 h
CD playback
Sony R20P: approx. 1 h
Sony alkaline LR20: approx. 4 h
Dimensions
Approx. 530 ×327 ×241 mm (w/h/d)
(incl. projecting parts)
MassApprox. 8 kg (incl. batteries)
Supplied accessories
AC power cord (1)
Remote control (1)
Design and specifications are subject to change without
notice.

3
CFD-G550CP
•UNLEADED SOLDER
Boardsrequiringuse of unleaded solderareprinted with thelead-
free mark (LF) indicating the solder contains no lead.
(Caution:Someprintedcircuit boards maynotcome printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleadedsoldermelts at a temperatureabout40°C higherthan
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
TABLE OF CONTENTS
1. SERVICING NOTES......................................................... 4
2. GENERAL............................................................................ 5
3. DISASSEMBLY
3-1. Cabinet (Upper) (1) Section ................................................ 9
3-2. Cabinet (Upper) (2) Section ................................................ 9
3-3. Cabinet (Front) Section .....................................................10
3-4. Control 2 Board, VOL Board ............................................ 10
3-5. LCD Board ........................................................................ 11
3-6. Power Board, Trans Board ................................................ 11
3-7. Control 1 Board.................................................................12
3-8. H/P Board, TU Board........................................................ 12
3-9. Main Board ....................................................................... 13
3-10. CD Block Section.............................................................. 13
3-11. Optical Pick-up ................................................................. 14
3-12. Tape Mechanism Deck ...................................................... 14
3-13. TC Board ........................................................................... 15
3-14. Main Belt, Sub Belt...........................................................15
4. MECHANICAL ADJUSTMENTS............................... 16
5. ELECTRICAL ADJUSTMENTS
Tape Section .......................................................................... 16
Tuner Section......................................................................... 17
CD Section ............................................................................ 18
6. DIAGRAMS
6-1. Block Diagram – CD Section –......................................... 19
6-2. Block Diagram – Main Section – ...................................... 20
6-3. Note for Printed Wiring Boards and
Schematic Diagrams .......................................................... 21
6-4. Waveforms......................................................................... 21
6-5. Circuit Boards Location .................................................... 21
6-6. Printed Wiring Board – CD Section – ............................... 22
6-7. Schematic Diagram – CD Section –.................................. 23
6-8. Printed Wiring Board – Tuner Section – ........................... 24
6-9. Schematic Diagram – Tuner Section – .............................. 25
6-10. Schematic Diagram – Main Section (1/2) – ...................... 26
6-11. Schematic Diagram – Main Section (2/2) – ...................... 27
6-12. Printed Wiring Boards – Main Section – .......................... 28
6-13. Printed Wiring Board – TC Section – ............................... 29
6-14. Schematic Diagram – TC Section – ..................................30
6-15. Schematic Diagram – Control Section – ........................... 31
6-16. Printed Wiring Boards – Control Section –....................... 32
6-17. Printed Wiring Boards – Power Section –......................... 33
6-18. Schematic Diagram – Power Section – ............................. 34
7. EXPLODEDVIEWS
7-1. Overall Section .................................................................. 42
7-2. Cabinet (Front) Section .....................................................43
7-3. Cabinet (Rear) Section ...................................................... 44
7-4. Cabinet (Upper) (1) Section .............................................. 45
7-5. Cabinet (Upper) (2) Section .............................................. 46
7-6. Tape Mechanism Section .................................................. 47
7-7. CD Mechanism Section .................................................... 48
8. ELECTRICAL PARTS LIST......................................... 49

4
CFD-G550CP
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the lid (CD), use
Chuck Plate Jig.
• Code number of Chuck Plate Jig: X-4918-255-1
SECTION 1
SERVICING NOTES
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Turn ON the [OPERATE] button and press [CD] button to CD
position.
2. Open the CD lid.
3. Turn on S801 with screwdriver, etc. as following figure.
4. Press the N X (CD) button.
5. 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 three times for focus search.
S801

5
CFD-G550CP
SECTION 2
GENERAL This section is extracted
from instruction manual.
4
Playing an audio CD or MP3 files
Connect the supplied AC power cord (see page 23).
1Press POWER to turn on the player.
2Press ZPUSH OPEN/CLOSE to
open the CD compartment and place
a CD on the CD compartment.
3Press ZPUSH OPEN/CLOSE to
close the CD compartment.
With the label side up
142,3
Basic Operations
Basic Operations
5
Display
Playing
time
Track
number
To Press
adjust the volume VOL +*, –
stop playback x
pause playback u* (X on the remote)
Press the button again to
resume play after pause.
go to the next track >
go back to the previous track .
remove the CD ZPUSH OPEN/CLOSE**
turn on/off the player POWER
*The button has a tactile dot.
**Once you open the CD compartment, the track to start play will
change to the beginning of the first track.
Tip
Playback starts from the
track you last stopped
playing (Resume play).
During stop, the track
number to be played is
displayed.
To cancel the resume play
to start play from the
beginning of the first track,
press xin stop mode.
u
POWER
VOL +, –
x
ZPUSH
OPEN/CLOSE
continued
4 Press u (N on the remote).
The player plays all the tracks once.
To play a CD with MP3 files, see
page 6.
Use these buttons for additional operations
., >
6
Note
Before playing a file, this
player reads all file and
folder information on the
CD. Depending on the file
structure, it may take more
than a minute to read them.
During this time,
“READING” is displayed.
Tip
You can use the buttons
mentioned in the table on
page 5 for additional
operations in the same way
as when playing an audio
CD.
Playing a CD with MP3 files
1Press POWER to turn on the player.
2Press ZPUSH OPEN/CLOSE to open the CD
compartment and place a CD on the CD compartment
(see page 4) .
3Press ZPUSH OPEN/CLOSE to close the CD
compartment.
4Press u (N on the remote).
The player plays all MP3 files on the CD.
When you play a CD with MP3 files, “MP3” appears
in the display.
To select a folder
Press FOLDER + to go forward and – to go backward.
To select a file
Press >to go forward and .to go backward.
Track number
u
., >
POWER
After the file name is
displayed, the playing time
will appear
ZPUSH
OPEN/CLOSE
Playing an audio CD or MP3 files (continued)
FOLDER –, +
Basic Operations
7
Example of folder structure and playing
order
The playing order of the folders and files is as follows:
Notes
•Afolder that does not
include an MP3 file is
skipped.
•Maximum number of
folders: 255
Maximum number of files:
255
•Folder names and file
names can be displayed
with up to 64 characters.
•The characters A - Z, a - z,
0 - 9, and _ can be
displayed on this player.
Other characters are
displayed as “*”.
•This player conforms to
Version 1.1 of the ID3 tag
format. If the file has the
ID3 tag information, “song
title”, “artist name” and
“album name” can be
displayed.
About CD-Rs/CD-RWs and MP3 files
This player can play CD-Rs/CD-RWs recorded in the CD-
DA format* and MP3 files recorded in the CD-ROM
format, but playback capability may vary depending on the
quality of the disc and the condition of the recording
device.
*CD-DA is the abbreviation for Compact Disc Digital Audio. It is
a recording standard used for Audio CDs.
CD-R
CD-RW
3
2
1
2
4
5
3
6
7
8
4
9
5
0
6
1
MP3 file
Folder

6
CFD-G550CP
8
Listening to the radio
Connect the supplied AC power cord (see page 23).
1Press POWER to turn on the player.
2Press RADIO BAND•AUTO
PRESET (BAND on the remote)
until the band you want appears in
the display.
Each time you press the button, the
indication changes as follows:
“FM” t“AM”.
3Hold down TUNE + or – until the
frequency digits begin to change in
the display.
The player automatically scans the
radio frequencies and stops when it
finds a clear station.
If you can’t tune in a station, press
TUNE + or – repeatedly to change
the frequency step by step.
21
Display
Indicates an FM stereo
broadcast
3
Basic Operations
9
Use these buttons for additional operations
Tip
If the FM broadcast is
noisy, press MODE until
“Mono” appears in the
display and radio will play
in monaural.
To Press
adjust the volume VOL +*, –
turn on/off the radio POWER
*VOL + has a tactile dot.
To improve broadcast reception
Reorient the antenna for FM. Reorient the player itself for
AM.
POWER
VOL +, –
MODE
for FM for AM
10
Playing a tape
23
Display
Connect the supplied AC power cord (see page 23).
1Press POWER to turn on the player.
2Press xZ to open the tape
compartment and insert a recorded
tape. Close the compartment. Use
TYPE I (normal) tape only.
3Press N*.
The player starts playing.
1
With the side you want
to play facing upward
Basic Operations
11
Use these buttons for additional operations
To Press
adjust the volume VOL +*, –
stop playback xZ
fast-forward or rewind Mor m
pause playback X
Press the button again to resume
play after pause.
eject the cassette xZ
turn on/off the player POWER
*VOL + and Nhave a tactile dot.
xZ
X
m, M
POWER
VOL +, –

7
CFD-G550CP
12
Connect the supplied AC power cord (see page 23).
1Press POWER to turn on the player.
2Press xZ to open the tape
compartment and insert a blank tape.
Use TYPE I (normal) tape only.
Close the compartment.
3Select the program source you want
to record.
To record from the CD player, press
xand load a CD (see page 4).
To record from the radio, press
RADIO BAND•AUTO PRESET and
tune in the station you want (see page
8).
Recording on a tape
3
1
With the side you want to
record on facing upward
Display
2
4
Basic Operations
13
To Press
stop recording xZ
pause recording X
Press the button again to
resume recording.
turn on/off the player POWER
4 Press zto start recording
(Nis depressed automatically).
Use these buttons for additional operations
Tips
•Adjusting the volume or the
audio emphasis (see page
21) will not affect the
recording level.
•For the best results, use the
AC power as a power
source for recording.
•To erase a recording,
proceed as follows:
1Insert the tape whose
recording you want to
erase.
2 Press X.
3 Press z. (N
is depressed
automatically.)
4 Press X.
X
POWER
xZ
z
14
The CD Player
Using the display
You can check information about the CD
using the display.
DISPLAY
ENTER
MEMORY
Total playing time
Total track number
Total track number
Total folder number
t
Checking the information of
an audio CD
To check the total track number
and playing time of the CD
While the CD is stopped, you can check
them in the display.
To check the remaining time
Press DISPLAY•ENTER•MEMORY while
playing a CD. The display changes as
follows:
The current track number and playing
time
r
The current track number and the
remaining time of the current track
r
The number of tracks left and the time
remaining on the CD
t
Checking the information of a
CD with MP3 files
To check the total folder number
and total track number on the
CD
While the CD is stopped, you can check
them in the display.
To check file information
Press DISPLAY•ENTER•MEMORY while
playing an MP3 file. The display changes as
follows:
The current track number and playing
time
r
The current track number and the file
name
r
The folder number and the folder name*
r
The current track number and ID3: the
song title / the artist name / the album
name**
*If the folder does not have a folder name,
“ROOT” appears instead of a folder name.
**If the file does not have ID3 information, “NO
TITLE”, “NO ARTIST” or “NO ALBUM”
appears in the display.
15
The CD Player
Locating a specific
track
You can quickly locate any track on a CD
using the number buttons on the remote.
You can also find a specific point in a track
while playing a CD.
To locate Press
a specific track the number button of the track
directly
a point while > (forward) or .
listening to (backward) while playing and
the sound hold it until you find the point
a point while >(forward) or .
observing (backward) in pause and hold
the display it until you find the point
., >
Number
buttons
Notes
•Locating a specific track using the number
buttons is only available for the tracks in the
selected folder.
•You cannot locate a specific track if "SHUF" or
"PGM" is lit in the display. Turn off the
indication by pressing x.
Tips
•When you locate a track numbered over 10,
press >10 first, then the corresponding number
buttons.
Example: To play track number 23, press >10
first, then 2 and 3.
•To select a track numbered over 100 or more,
press >10 twice, then the corresponding number
buttons.

8
CFD-G550CP
•The equipment can be removed using the following procedure.
SECTION 3
DISASSEMBLY
3-1. CABINET (UPPER) (1) SECTION
(Page 9)
3-2. CABINET (UPPER) (2) SECTION
(Page 9)
SET
3-3. CABINET (FRONT) SECTION
(Page 10) 3-7. CONTROL 1 BOARD
(Page 12)
3-12. TAPE MECHANISM DECK
(Page 14)
3-13. TC BOARD
(Page 15) 3-14. MAIN BELT, SUB BELT
(Page 15)
3-8. H/P BOARD,
TU BOARD
(Page 12)
3-9. MAIN BOARD
(Page 13)
3-10. CD BLOCK SECTION
(Page 13)
3-11. OPTICAL PICK-UP
(Page 14)
3-4. CONTROL 2 BOARD,
VOL BOARD
(Page 10)
3-5. LCD BOARD
(Page 11) 3-6. POWER BOARD, TRANS BOARD
(Page 11)

9
CFD-G550CP
3-2. CABINET (UPPER) (2) SECTION
3-1. CABINET (UPPER) (1) SECTION
Note : Follow the disassembly procedure in the numerical order given.
1 Open the handle in the
direction of the arrow.
3 Open the cassette lid.
5 Open the CD lid.
2 seven screws
(+
BV tapping (B3) )
4 two screws
(+
BV tapping (B3) )
6 two screws
(+
BV tapping (B3) )
two claws
4
3
1 Close the cassette lid.
qa handle
2 Close the CD lid.
6 CNP801 (11P)
7 CNP393 (4P)
8 CNP392 (4P)
9 CNP301 (5P)
0 cabinet (upper) section
5 CNP804 (2P)

10
CFD-G550CP
3-4. CONTROL 2 BOARD,VOL BOARD
3-3. CABINET (FRONT) SECTION
5
6 cabinet (front) section
1 battery lid
2 four screws
(+
BV tapping (B3) )
3 four screws
(+
BV tapping (B3)
)
4 four screws
(+
BV tapping (B3) )
7 button (volume)
2 button (function)
9 VOL board
5 CONTROL 2 board
1 two screws
(+
BV tapping (B2.6) )
6 two screws
(+
BV tapping (B2.6) )
3 three screws
(+
P tapping (B2.6) )
8 three screws
(+
P tapping (B2.6) )
4 three screws
(+
P tapping (B2.6) )

11
CFD-G550CP
3-5. LCD BOARD
3-6. POWER BOARD,TRANS BOARD
8 LCD board
6 rear cover
9 panel LCD sub assy
0 plate light guide LED
qa ring ornament
3 woofer speaker
1 two screws
(+
BV tapping (B3)
)
4 five screws
(+
BV tapping (B3) )
5 four screws
(+
BV tapping (B2.6) )
7 three screws
(+
BV tapping (B2.6) )
2 two screws
(+
BV tapping (B3) )
8
qs
POWER board,
TRANS board
Remove the harnesses.
Remove the harnesses.
4 BAT1 board
2 CNP902 (4P)
1 sheet trans chassis
3 screw
(+
PWH tapping (B3) )
5 four screws
(+
BV tapping (B3) )
6 screw
(+
BV tapping (B3) )
9 screw
(+
BV tapping (B3) )
7 two screws
(+
BV tapping (B3) )
0 two screws
(+
BV tapping (B3) )
qa two screws
(+
BV tapping (B3) )

12
CFD-G550CP
3-8. H/P BOARD,TU BOARD
3-7. CONTROL 1 BOARD
4 CONTROL 1 board
6 button (woofer) assy
7 button (CD)
8 button (power)
1 CNP806 (3P)
3 two screws
(+
PWH tapping (B2.6) )
2 nine screws
(+
BV tapping (B2.6) )
5 screw
(+
BV tapping (B2.6) )
6 JACK HOLD board
7 H/P board
8 CNP391 (9P
)
3 Remove the soldering
4 TU board
2 CNP1 (11P)
1 two screws
(+
BV tapping (B3) )
5 screw
(+
PWH tapping (B2.6) )

13
CFD-G550CP
3-9. MAIN BOARD
3-10. CD BLOCK SECTION
7 CNJ806 (20P)
8 MAIN board
6
1
CNP805 (11P)
3 CNP806 (3P)
4 connector (2P)
2 CNP303 (6P)
5 two screws
(+
BV tapping (B3) )
3 CD block section
1 two screws
(+
PWH tapping (B2.6) )
1 two screws
(+
PWH tapping (B2.6) )

14
CFD-G550CP
3-11. OPTICAL PICK-UP
3-12.TAPE MECHANISM DECK
1 gear (A)
claw
5 sled shaft
6 optical pick-up
42
screw
(
+P 2x 3
)
3 screw
(
+P 2x 3 )
4 Open the cassette lid.
5 tape mechanism dec
k
1 CNP303 (6P)
2 CN303 (11P)
3 three screws
(+
BV tapping (B3) )

15
CFD-G550CP
3-13.TC BOARD
3-14. MAIN BELT, SUB BELT
1 screw
4 TC board
2 hook
3 Remove soldering from the four points.
yellow red white
black
TC board
1 two screws
(
+bind DT M2 x 6)
2 hook
3 motor assy
(M801)
4 main belt (B)
5 sub belt (B)

16
CFD-G550CP
i jack (J391)
set
32
Ω
test tape
WS-48A
(3 kHz, 0 dB)
digital frequency
counter
TAPE SECTION 0 dB = 0.775V
• Standard Output Level
Output terminal HP OUT
load impedance 32 Ω
output signal level 0.25 V (–10 dB)
•TestTape
Type Signal Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
Tape Speed Adjustment
Procedure:
Mode: playback
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 demagne-
tizer. (Do not bring the head magnetizer close to the erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power
supply voltage (12V) unless otherwise noted.
Torque Measurement
Mode Torque meter Meter reading
2.95 – 6.86 mN • m
FWD CQ-102C (30 – 70 g • cm)
(0.42 – 0.97 oz • inch)
FWD 0.15 – 0.53 mN • m
Back Tension CQ-102C (1.5 – 5.5 g • cm)
(0.021 – 0.076 oz • inch)
more than 5.88 mN • m
FF CQ-201B (more than 60 g • cm)
(more than 0.83 oz • inch)
more than 5.88 mN • m
REW CQ-201B (more than 60 g • cm)
(more than 0.83 oz • inch)
TapeTension Measurement
Mode Tension meter Meter Reading
FWD CQ-403A more than 100 g
(more than 3.53 oz)
SECTION 5
ELECTRICAL ADJUSTMENTS
SECTION 4
MECHANICAL ADJUSTMENTS
Adjust so that the value on the digital frequency counter is
3,000 Hz.
Specification Value:
Digital frequency counter
2,940 to 3,060 Hz
Adjust so that the frequency at the beginning and that at the end of
tape winding are between 2,970 to 3,030 Hz.
Adjustment Location:
Tape speed adjustment
control inside motor
(M801)

17
CFD-G550CP
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
AM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display 530 kHz 1,710 kHz
Reading on Digital voltmeter 1.0 ±0.05 V 5.3 ±0.7 V
Adjustment Part L4 <confirmation>
AMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 CT3
620 kHz 1,400 kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7 MHz
FM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display 87.5 MHz 108 MHz
Reading on Digital voltmeter 1.3 ±0.3 V 3.0 ±0.2 V
Adjustment Part <confirmation> L2
FMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
87.5 MHz 108 MHz
digital
voltmeter
100 k
Ω
TP (VT)
i jack (J391)
set
32
Ω
level meter
(range: 0.5–5 V ac
)
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
TP (FM IN)
FM RF signal
generator
0.01
µ F
set
TUNER SECTION 0 dB = 1 µV
•AM Section
Setting:
RADIO BAND•AUTO PRESET button:AM
30% amplitude
modulation by
400 Hz signal
•FM Section
Setting:
RADIO BAND•AUTO PRESET button: FM
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
•Connecting Level Meter (FM and AM)
Adjustment Location: See page 18.
•Connecting DigitalVoltmeter (FM and AM)
•Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.

18
CFD-G550CP
Q701
R701
R702
R703
R704
R705
R706
R707
R708
R709 R711
R716
R719
R720
R721
R722
R729
R730
R745
C701
C703
C705
C706
C740
C710
C711
C712
C713
C714
C716
C717
C718
C719
C720
C745
C750
C751
C721
R710
R731
R755
R756
R757
R758
R759
R724
R725
R726
R727
R728
R732
R733
C708
C746
C742
C743
C744
C76
C763
R763
R764
R723
IC701
CNP701
M701
C704
C723
C707
C715
C709
TP
(RF) TP
(VC)
– CD/MP3 board (side B) –
Adjustment Location:
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between IC701 pin 4and pin qa (or
TP (RF) and TP (VC).
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the NX(CD) button.
4. Confirm 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.
• RF signal reference waveform (eye pattern)
Test Point:
RF level :
0.85 ±0.2 Vp-p
VOLT/DIV : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
When observing the eye pattern, set the oscilloscope forAC range
and raise vertical sensitivity.
L4
TP (FM IN)
(CONDUCTOR SIDE)
CT1
IC1 IC2
CT3
L1
L2
T2
T1
L3
– MAIN board (component side) –
L4
AM
FREQUENCY
COVERAGE
ADJUSTMENT
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
CT3, L3
AM
TRACKING
ADJUSTMENT
CT1, L1
FM
TRACKING
ADJUSTMENT
T1
AM
IF
ADJUSTMENT
T2
FM
IF
ADJUSTMENT
TP (VT)
(CONDUCTOR SIDE)

CFD-G550CP
19 19
CFD-G550CP
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM — CD SECTION —
A
C
B
F
E
D
A
C
B
D
LD
PD
VR
F
T+
T–
F+
F–
SL+
SL–
SP+
SP–
E
VREF
LD
PD
LD POWER
CONTROLLER
Q701 APC
FIN2
FIN1
LDD
LDS
TIN2
TIN1
VREF
RF
10
9
11
80
7
79
48
20
17
18
TRACKING
COIL
DRIVE
10
7
FOCUS
COIL
DRIVE
TIN
FIN
25
SLIN
SLED
MOTOR
DRIVE
3
SPINDLE
MOTOR
DRIVE
SPIN
VREF
OPIN
MUTE
T+
T–
12
11
F+
F–
26
27
SL+
SL–
2
1
SP+
SP–
TRACKING
COIL
FOCUS
COIL
OPTICAL PICK-UP
BLOCK
(KSS-213R)
M
M
M702
SLED
MOTOR
M701
SPINDLE
MOTOR
SLED/SPINDLE
MOTOR DRIVER,
TRACKING/FOCUS
COIL DRIVER
IC702
S701
(LIMIT)
EFMIN
HFL
AGC
PH(RFENV)
FE
TE
VREF
CONT1 FSEQ CONT4 DRF RES DI CE CL WRQ DO XOUT XIN
LCHO
RCHO
DATA
DATACK
LRSY
ASDFIN
ASDACK
ASLRCK
CF2
FSX/16MIN
16MOUT
A
3
67
TDDTD
FD
SP
SL
31 72 25 66 63 61 62 49 48
73
74
75
76
77
78
80
1
2
3
4
5
9
59
58
57
56
55
52
50
65 64
42
45
RF AMP,
SYSTEM SERVO PROCESSOR,
DIGITAL SIGNAL PROCESSOR
IC701
48
7772 73 76 75 50 7478
X701
16.9MHz
CD-CE
CD-DO
CD-CL
CD-WRQ
CD-RES
CD-DRF
CD-FSEQ
CD-DI
79
44
4980
MP3-CE
70
MP3-CL
6869
MP3-CMDIN
MP3-INTB
MP3-RESB
MP3-CMDOUT
RESB INTB CE CL CMDIN CMDOUT
CD-DOOR
CD-ON
21
SYSTEM CONTROLLER
IC801 (1/2)
CD1.8V
CD3.3V
S801
PUSH
OPEN/
CLOSE
D901 –904
F902
CNJ901
T901
POWER
TRANSFORMER
AC IN
Signal path
: CD
R-ch is omitted due to same as
L-ch.
CLV,CAV
CONTROL
PLL
VCEC
SWITCH
ERROR
CORRECTION
AUDIO CD
A/D
CONVERTER,
SERVO
PROCESSOR
FRAME SYNC
DETECT,PROTECT
INSERT
EFM DECODER
INTERPOLATION
MUTE
&
ATTENUATION
DEEMPHASIS
8FS
DIGITAL
FILTER
&
1-bit DAC
SERIAL
OUT
EXTERNAL
AUDIO IN
LPF
SLICE
LEVEL
CONTROL
GENERAL
PURPOSE
PORT
COMMAND
INTERFACE
CLOCK
GENERATOR
23
15
FD
SL
SP
TD
VREF
VREF
VREF
R-CH
DATACK
LRSY
7960 DATA IN
ADDATA
ADBCK
ADLRCK
CF2IN
WEB OEB CASLB CASUB RASB
CKOUT
754
41 44 43 45 42
16 30 31 29 15
23-30,33-40 60-53,50
18-21,24-28
2-5,7-10,
35-38,40-43
CKIN
CMDOUT
CMDIN
CL
CE
INTB
RESB
CMDOUT
CMDIN
CL
CE
INTB
RESB
CD L CH
DRY BATTERY
SIZE " D "
(IEC DESIGNATION R20)
8PCS,12V
D/A
CONVERTER
PH/BH
POWER
CONTROL
Q806,808
+6V
REG
Q972
+3.3V
REG
Q956
+9V
REG
Q971
+6V
REG
Q954
POWER
CONTROL
Q951-953(E41)
Q952,953(MX)
20
FDD SPDO SLDO
21 22 23
+1.8V
REG
IC1003
Q803
AC CHK
PCON
93
6V
U-COM(VDD)
U-COM3.3V
VDD(SW)
3.3V
CD6V
AUDIO 6V
MDATA0
I
MDATA15
MADRS0
I
MADRS8
WE
OE
LCAS
UCAS
RAS
DQ0-DQ15 A0-A8
MPS DECODER,
CD-ROM DECODER,
ANTI-SHOK
CONTROLLER
IC1001
SDRAM
IC1002
13
+3.3V
REG
IC803
23
(Page 20)

CFD-G550CP
2020
CFD-G550CP
6-2. BLOCK DIAGRAM — MAIN SECTION —
5
21 22 16
4
L-CH
R-CH
HRP301
RECORD/PLAYBACK
HEAD
HE301
ERASE HEAD
DET
ALC 2
RADIO L
18
15
L.LO
R.LO
TAPE
R-CH
TU_IN_R
TU_IN_L
TAPE
LOGIC
13
SC
14
SI
POWER AMP
IC371
R-CH
SP191
SPEAKER
(L-CH)
SP291
SPEAKER
(R-CH)
J391
REF
L.LINE
L.RO
REC L.RAD
R.RAD
T301
REC BIAS OSC
Q301
TAPE
20
V-CLOCK
V-DATA
CD ON
SYSTEM CONTROLLER
IC801 (2/2)
9521 94
EEPROM
IC802
REMOTE
CONTROL
RECEIVER
IC891
SCL SAD
46
48 1
3
KEY1 KEY2
53
KEY3
54 55
Signal path
: FM
: AM
: TAPE PLAY
: TAPE REC
: CD
R-ch is omitted due to same as
L-ch.
REC/PB
PRE AMP
IC301
12 3
WOOFER AMP
IC351
20
6
14 R.LINE
8R.IN
L.IN
9R.RO
i
A-MUTE
91
MUTE
Q354
OVER LOAD
DET
Q351
WOOFER 1/2
96
WOOFER ON/OFF
92
TAPE-PLAY
97
M
24
REC IN
98
-1 -2
S301
(REC/PB)
REC
PB
VDD (SW)
KEY3
KEY1
KEY2
M971
CAPSTAN/REEL
MOTOR
17
LINE
CD_IN_R
CD_IN_L
S417,418
S409-416,
S401-408
65
1112 33
AUDIO 6V
AC-HI
RMC IN
TU_IN_R
SP393
WOOFER
U-COM
(VDD)
9V
S971
(PLAY)
S972
(MOTOR)
A
KEY NETWORK
D402
OPR/BATT
D801
D803
VIN1 OUT1
IC321
ELECTRONIC VOLUME
5 17
VOL AMP
32313029
2223
2726
242627
30-33
LIQUID CRYSTAL
DISPLAY PANEL
LCD401
1-9,34-41,
43-48,50-55
S0
I
S28
COM0
I
COM3
3
5
8
12
WOOFER
CONTROL
Q321-323
STANDBY
SW
Q352,353
MUTE
Q171
21 3 4 5
CE CLK DATA COUNT RST C/D CS DATA CLK
RESET
C/D
CS
SI
SCK
W-LED2 W-LED1 WAKE-UP
43
RESET TU-MUTE
39
X1
38
X2
35
FM/AM SHIFT
19
TU ON
X801
5MHz
RESET
IC804
3.3V
POWER
CONTROL
Q802,811
1
26VRADIO 6V
1 2 3 4
11 12 20 19
CE CL
DI
DO
AM IN FM IN XOUT XIN
13
MO/ST
10
IF IN
LPF2/MO-ST
LPF1/BAND
IF-OUT
ST-IND
OSC-OUT
7
BAND
8
ST-IND
18 LP-OUT
AM
OSC
AM
MIX
FM
MIX
FM
OSC
AM RF-IN
FM
RF-IN
FM
IF-IN
AM
IF-IN
X1
75kHz
FM/MW PLL
IC2
14 17 13 18
16 15 11
12
1920
22 4 6
7
10
2
2124
T1
T2
CF4
L2
L1 CT1
RADIO 6V
RADIO 6V
D1 D2
CT3
D3
L3
CT3,L3
AM
TRACKING
L4
AM FREQUENCY COVERAGE
CT1,L1
FM
TRACKING
L2
FM
FREQUENCY
COVERAGE
T2
FM
IF
T1
AM
IF
ANT1
FM
TELESCOPIC
ANTENNA
IF
BUFFER
AM
DET
FM
DET
IF CUT
AF
BUFFER
FM
MPX MUTE
IF CUT
R-OUT
L-OUT
RADIO 6V
QUAD
FM/MW/LW FRONT-END, IF AMP,
FM MPX
IC1
L4
RADIO 6V
CF2
RADIO 6V
RADIO 6V
RADIO 6V
L3
AM
FERRITE-ROD
ANTENNA
RADIO 6V
AM
OSC
MIX-OUT
FM
RF-OUT FM OSC
DET-OUT MPX-IN
VDD (SW)
D323
EEPROM
TU LCD
LED DRIVE
Q815,816
LCD DRIVER
IC401
D403-410
WAKE-UP
Q814
FREQUENCY
SHIFT
Q812,813
(Page 19)