CFD-G55 - Sony Audio Service Manual (repair manual)

Model
CFD-G55
Pages
52
Size
9.5 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cfd-g55.pdf
Date

View Sony CFD-G55 Service Manual online

CFD-G55
US Model
Canadian Model
E Model
SERVICE MANUAL
CD RADIO CASSETTE-CORDER
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
9-873-639-06
2005I16-1
© 2005.09
SPECIFICATIONS
Ver. 1.5  2005.09
Model Name Using
CD Section
NEW
Similar Mechanism
Tape Section
CFD-G50
CD Mechanism Type
KSM-213RDP/KSM-213CDP
Optical Pick-up Type
KSS-213R/KSS-213C
Tape Transport Mechanism Type
MF-V5-117
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION
With 3.2-ohm loads, both channels driven
from 1 000 - 10 000 Hz; rated 3 W per
channel-minimum RMS power, with no
more than 10 % total harmonic distortion
in AC operation.
Woofer with 4-ohm loads, driven at
50 - 150 Hz; rated 6 W minimum RMS
power, with no  more 10 % total harmonic
distortion in AC operation.
Other specifications
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
Antennas
FM: Telescopic antenna
AM: Built-in ferrite bar antenna
IF
FM : 10.7 MHz
AM: 450 kHz
Cassette-corder section
Recording system
4-track 2 channel stereo
Fast winding time
Approx. 115 s (sec.) with Sony cassette C-60
Frequency response
TYPE I (normal): 70 - 13 000 Hz
General
Speaker
Full range: 10 cm (4
 
 in.) dia., 3.2 
Ω, cone type
(2)
Woofer: 8 cm (3 
1
 in.) dia., 4 
Ω, cone type (1)
Outputs
Headphones jack (stereo minijack)
For 16 - 68 
Ω impedance headphones
Power output
4 W + 4 W  (at 3.2 
Ω, 10% harmonic distortion
in DC operation)
Woofer:
12 W (at 4 
Ω, 10 % harmonic distortion in DC
operation)
Power requirements
For CD radio cassette-corder:
120V AC, 60 Hz (Other models)
110-127V, 220-240V AC
Selectable, 60Hz (EA model)
230V AC, 50Hz (MY, SP models)
12 V DC, 8 size D (R20) batteries
For remote control:
3 V DC, 2 size AA (R6) 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. 456 
× 195 × 330 mm  (w/h/d)
(18 
× 7 
3
4
 
× 13 inches)
 
(incl. projecting parts)
Mass
Approx. 6.8 kg (14 lb. 16 oz) (incl. batteries)
Supplied accessory
AC power cord (1)
Remote control (1)
Design and specifications are subject to change
without notice.
Radio section
Frequency range
FM : 87.5 - 108 MHz
• Abbreviation
EA  : Saudi Arabia model.
  MY  : Malaysia model.
  SP  : Singapore model.
AM: 530 - 1 710 kHz (Other models)
: 531 - 1 611 kHz (9 kHz Step)
  530 - 1 610 kHz (10 kHz Step) 
  (MY, SP, EA models)
2
CFD-G55
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of 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.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 
0
 OR DOTTED LINE WITH
MARK 
0
 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
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 
0
 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
TABLE OF CONTENTS
1. SERVICING  NOTES
······················································ 3
2. GENERAL
·········································································· 4
3. DISASSEMBLY
································································ 5
3-1. Cabinet (Front) Assy- 1 ················································· 5
3-2. Cabinet (Front) Assy- 2 ················································· 6
3-3. CONTROL (POWER), CONTROL (CD),
HEADPHONE Board ··················································· 6
3-4. Panel Assy ····································································· 7
3-5. LCD Board, Panel (Upper) ··········································· 7
3-6. Panel (Upper) Assy- 1 ··················································· 8
3-7. Panel (Upper) Assy- 2 ··················································· 8
3-8. POWER, TRANS, VOL SEL Board ····························· 9
3-9. TUNER Board, Duct (Upper, Lower) ··························· 9
3-10. BATT COM, BATT Board ·········································· 10
3-11. MAIN Board- 1 ··························································· 10
3-12. MAIN Board- 2 ··························································· 11
3-13. Mechanism Deck Section (MF-V5-117) ···················· 11
3-14. CD Block Section (KSM-213RDP) ···························· 12
3-15. PDW, L-R/REG Board ················································ 12
4. ADJUSTMENTS
···························································· 13
4-1. Mechanical Adjustments ············································· 13
4-2. Electrical Adjustments ················································ 13
5. DIAGRAMS
······································································ 17
5-1. Circuit Boards Location ·············································· 17
5-2. Block Diagrams ·························································· 18
MAIN Section ····························································· 18
TUNER/CD Section ··················································· 19
5-3. Printed Wiring Board  – TUNER Section – ················ 20
5-4. Schematic Diagram – TUNER Section – ··················· 21
5-5. Printed Wiring Board – CD Section – ························ 22
5-6. Schematic Diagram – CD Section – ··························· 23
5-7. Printed Wiring Board – TC Section – ························· 24
5-8. Schematic Diagram – TC Section – ···························· 24
5-9. Printed Wiring Board – MAIN Section – ··················· 25
5-10. Schematic Diagram – MAIN Section (1/2) – ············· 26
5-11. Schematic Diagram – MAIN Section (2/2) – ············· 27
5-12. Printed Wiring Board – AMP Section – ······················ 28
5-13. Schematic Diagram – AMP Section – ························ 29
5-14. Printed Wiring Board – CONTROL Section – ··········· 30
5-15. Schematic Diagram – CONTROL Section – ·············· 31
5-16. Printed Wiring Board – POWER Section – ················ 32
5-17. Schematic Diagram – POWER Section – ··················· 33
5-18. IC Pin Function Description ······································· 36
6. EXPLODED VIEWS
······················································ 38
6-1. Cabinet (Front) Section ··············································· 38
6-2. Cabinet (Rear) Section ················································ 39
6-3. Cabinet (Upper) Section ············································· 40
6-4. Mechanism Deck Section- 1 (MF-V5-117) ················ 41
6-5. Mechanism Deck Section- 2 (MF-V5-117) ················ 42
6-6. CD Mechanism Section (KSM-213RDP) ··················· 43
7. ELECTRICAL PARTS LIST
······································· 44
Ver 1.1  2002.05
3
SAFETY  CHECK-OUT
       After correcting the original service problem, perform the
following safety checks 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
    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 0.5 mA (500 microamperes).
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
instruments.
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 voltmeter. 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
0.15 
µ
F
1.5 k
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
CFD-G55
SECTION  1
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 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 more than 30 cm away from the  objective lens.
 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.
Press CD open knob.
2.
Open the lid for CD.
3.
Push on SWITCH (S801) as following figure.
4.
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 search.
Insert a precision 
screw driver and push  
SWITCH (S801)
4
CFD-G55
SECTION 2
GENERAL
This section is extracted
from instruction manual.
Remote Control
Location of controls
FUNCTION
BAND
POWER
VOL +*, –
x
.
,
>
Z
 PUSH
OPEN/CLOSE
VOLUME –, +*
TUNE –, +
DISPLAY
ENTER
MEMORY
MODE
i
Number buttons
x
u
*
POWER
LINE
OPR/BATT
Loading a CD
With the labeled side up
Inserting a cassette
With the side you want to
play facing upward
BAND
AUTO PRESET
SOUND
Display
Remote sensor
Total track number
Programmed track
Playing order
D
E
Total playing time
Display
*The button has a tactile dot.
POWER DRIVE
WOOFER
.
>
PRESET –, +
N
X
SLEEP
MODE
TUNE+, –
WOOFER
SOUND
SLEEP
LINE IN
(rear)
About CD-Rs/CD-RWs
This player can play CD-Rs/CD-RWs
recorded in the CD-DA 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.
*
5
CFD-G55
SECTION 3
DISASSEMBLY
 The equipment can be removed using the following procedure.
3-1. Cabinet (Front) Assy- 1
Note :
 Follow the disassembly procedure in the numerical order given.
CABINET (FRONT) ASSY-1
(page 5)
CABINET (FRONT) ASSY-2
(page 6)
PANEL ASSY
(page 7)
LCD BOARD, PANEL (UPPER)
(page 7)
CONTROL 
(POWER), 
CONTROL
 (CD), 
HEADPHONE
 BOARD
(page 6)
PANEL (UPPER) 
ASSY-1
(page 8)
PANEL (UPPER) 
ASSY-2
(page 8)
POWER, TRANS, VOL SEL 
BOARD
(page 9)
TUNER 
BOARD
, DUCT (
UPPER
, LOWER)
(page 9)
BATT COM, BATT 
BOARD
(page 10)
MAIN 
BOARD
-1
(page 10)
MAIN 
BOARD
-2
(page 11)
PDW, L-R/REG 
BOARD
(page 12)
MECHANISM DECK SECTION (MF-V5-117)
(page 11)
CD BLOCK SECTION (KSM-213RDP)
(page 12)
Set
2
 t
wo screws 
     +BVTP 3 
×
 20
3
 e
ight screws 
     +BVTP 3 
× 
14
5
 s
crew 
     +BVTP 3 
× 
10
4
 
Open the CD lid in the 
     direction of the arrow.
1
 
Remove the battery case lid 
     in the direction of the arrow.
detail view
Ver 1.1  2002.05
6
CFD-G55
3-3.   CONTROL (POWER) , CONTROL (CD) , HEADPHONE Board
3-2. Cabinet (Front) Assy- 2
1
 
Remove the cabinet (front) assy
     in the direction of the arrow.
4
 
CNP391
     (from PWD board KH353)
5
 
CNP393
     (from L-R/REG board KH374)
3
 f
lexible flat cable
     (from MAIN board CNP801)
2
 f
lexible flat cable
     (from MAIN board CNP804)
MAIN board
HEADPHONE board
1
 t
wo screws 
     +BVTP 2.6 
×
 10
3
 s
crew
     +BVTP 3 
×
 10
5
 t
wo screws 
     +BVTP 2.6 
×
 10
6
 CONTROL (CD)
 board,
     CD button
4
 HEADPHONE
 board
2
 CONTROL (
POWER) board,
     power button
7
CFD-G55
3-4.  Panel Assy
3-5.  LCD Board, Panel (Upper)
5
 p
anel assy
2
 f
our screws 
     +BVTP 2.6 
×
 10
1
 s
crew 
     +BVTP 3 
× 
10
4
 f
lexible flat cable
    (from MAIN board CNP801)
3
 f
lexible flat cable
    (from MAIN board CNP804)
!™
 
 upper Panel
7
 t
wo screws 
     +BVTP 2.6 
×
 10
5
 PDW b
utton
8
 t
wo screws 
     +BVTP 2.6 
× 
10
3
 f
lexible flat cable
    (from MAIN board CNP804)
2
 
VOL 
CONTROL
 board
0
 f
lexible flat cable
    (from MAIN board CNP801)
1
 s
ix screws 
     +BVTP 2.6 
×
10
9
 front p
anel section
 
LCD board
6
 l
ight guide plate
     (PWD)
4
 VOL b
utton
8
CFD-G55
3-6.  Panel (Upper) Assy- 1
3-7.  Panel (Upper) Assy- 2
7
 
Open the cassette holder assy
      in the direction of the arrow.
5
 
Open the CD lid in the 
     direction of the arrow.
1
 
CNP1
     (from MAIN board KH801)
2
 
CNP903
    (from MAIN board KH301)
6
 Push STOP/EJECT button.
3
 
Remove two harnesses 
     in the direction of the arrow.
4
 
Remove two harnesses 
     in the direction of the arrow.
4
 
Remove the panel (upper)  assy 
     in the direction of the arrow.
2
 five
 screws 
     +BVTP 3 
×
 10
5
 h
andle
1
 f
our screws 
     +BVTP 3 
×
 10
3
 
Move the telescopic antenna in 
     the direction of the arrow.
9
CFD-G55
3-8.  POWER, TRANS, VOL SEL Board
3-9.  TUNER Board, Duct (Upper, Lower)
6
 four 
screws 
     +BVTP 3 
×
 10
3
 
screw 
     +BVTP 3 
×
 10
2
 
Remove harnesses in the direction 
     of the arrow.
8
 trans chassis 
  
4
 two 
screws 
     +BVTP 3 
×
 10
5
 two 
screws 
     +BVTP 3 
×
 10
power transformer 
(T901)
1
 
CNP902
     (from BATT board KH951)
7
 
five screws
     +BVTP 3 
×
 10
9
 
POWER board, TRANS board,  
     VOL SEL board
2
 t
wo screws 
     +BVTP 3 
×
 10
7
 t
wo screws 
     +BVTP 3 
×
 10
0
 
upper 
d
uct 
9
 
lower 
d
uct
1
 s
crew 
     +BVTP 3 
×
 10
4
 TUNER board
8
 s
even screws 
     +BVTP 2.6 
×
 8
6
 woofer bracket
3
 chassis (TU)
5
 two s
crews 
     +BVTP 3 
×
 10
Ver 1.1  2002.05
10
CFD-G55
3-10.  BATT COM, BATT Board
3-11.  MAIN Board- 1
1
 
CNP902 
     (from BATT board KH951)
5
 s
crew 
     3 
×
 8 (DIA, 10),+WH
6
 
BATT COM board
9
 b
attery 
     terminal
8
 b
attery terminal
4
 
BATT board
7
 
four 
s
crews
     +BVTP 3 
×
 10
3
 s
crew 
     3 
×
 8 (DIA, 10),+WH
2
 
Remove harnesses in the direction 
     of the arrow.
BATT board
9
 f
our screws
     +BVTP 3 
×
 10
3
 CD door sw
     (S801)
4
 CNP351
 
qs
MAIN board
 
 hook
8
 CNP371
7
 CNP372
6
 CNP373
5
 CNP352
0
 CNP302
1
 f
lexible flat cable
     CNP805
2
 f
lexible flat cable
     CNP802
L-R/REG board
PDW board
qs

Download Sony CFD-G55 Service Manual (Repair Manual)

Here you can view online and download Sony CFD-G55 Service Manual in PDF. CFD-G55 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony CFD-G55 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.