JVC FS-P550 User manual

SERVICE MANUAL
COPYRIGHT © 2004 Victor Company of Japan, Limited No.MB229
2004/5
COMPACT COMPONENT SYSTEM
MB22920045
FS-P550
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
Area suffix
C ------------------------- Canada

1-2 (No.MB229)
SPECIFICATION
Designs and Specifications are subject to change without notice.
Amplifier section Output Power:80 W HIGH:40 W (20 W + 20 W) at 4 Ω(10% THD)
LOW:40 W (20 W + 20 W) at 4 Ω(10% THD)
Audio Input AUX:400 mV/50 kΩ
Digital output DVD OPTICAL DIGITAL OUT:-21 dBm to -15 dBm (660 nm ±30 nm)
Video output Color system:NTSC (interlaced/progressive)
VIDEO (composite) 1 V(p-p)/75 Ω
S-VIDEO Y (luminance):1 V(p-p)/75 Ω
C (chrominance, burst):0.286 V(p-p)/75 Ω
COMPONENT (Y):1 V(p-p)/75 Ω
(PB/PR):0.7 V(p-p)/75 Ω
Speakers/Impedance 4Ω- 16Ω
Tuner section FM tuning range 87.5 MHz - 108.0 MHz
AM (MW) tuning range 530 kHz - 1 710 kHz
Disc player section Playable disc DVD Video/DVD Audio CD/VCD/SVCD
CD-R/CD-RW (CD/SVCD/VCD/MP3/WMA/JPEG format)
DVD-R/DVD-RW (Video format)
Dynamic range 90 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
Speakers Speaker units HIGH 4 cm (1 5/8 in.) cone ×1
LOW 10 cm (3 15/16 in.) cone ×1
Impedance HIGH 4Ω
LOW 4Ω
Dimensions (approx.) 145 mm ×230 mm ×202 mm (5 3/4 in. ×9 1/16 in. ×8in.) (W/H/D)
Mass (approx.) 2.2 kg (4.9 lbs) each
General Power requirement AC 120 V , 60 Hz
Power consumption 90 W (at operation) 1.8 W (on standby)
Dimensions (approx.) 170 mm ×230 mm ×311 mm (6 3/4 in. ×9 1/16 in. ×12 1/4in.) (W/H/D)
Mass (approx.) 5.0 kg (11.1 lbs)

(No.MB229)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per-
formed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution
Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

1-4 (No.MB229)
1.5 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.6 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a
time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.7 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible
wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Traverse mechanism assembly
Pickup
Short land section
Card wire
Connector

(No.MB229)1-5
1.8 Importance administering point on the safety
Power supply board
Caution: For continued protection against risk of fire,
replace only with same type 2.5 A/125 V for F1001
and F1003, 1.25 A/125 V for F1004, 6.3 A/125 V for
F1005 and F1006.
This symbol specifies the type of fast operating fuse.
Precaution: Pour la protection continue contre les
risques d'incendie, remplacer uniquement par le
meme type: fusible 2,5 A/125 V pour les F1001 et
F1003, 1,25 A/125 V pour le F1004, et 6,3 A/125 V
pour les F1005 et F1006.
Ce symbole specifie le type de fusible a action rapide.
^
2.5A-125V
F1001
1.25A-125V
F1004
2.5A-125V
F1003
6.3A-125V
F1005
6.3A-125V
F1006

1-6 (No.MB229)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB229)1-7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the side panels L/R
(See Figs.1 to 4)
(1) From the back side of the main body, remove the four
screws Aattaching the side panels L/R to the rear panel.
(See Fig.1.)
(2) From the bottom side of the main body, remove the two
screws Battaching the side panels L/R to the bottom chas-
sis. (See Fig.2.)
(3) From the both sides of the main body, release the engage-
ment sections (a, b) of the side panels L/R from the top
panel in the direction of the arrow. (See Figs.3 and 4.)
(4) Remove the side panels L/R toward this side.
Fig.1
Fig.2
Fig.3
Fig.4
Side panel R Side panel L
Rear panel
A
A
Side panel L
B
B
Bottom chassis
Side panel R
Top panel
a
a
a
Side panel R
Top panel
b
b
b
Side panel L

1-8 (No.MB229)
3.1.2 Removing the front panel assembly
(See Figs.5 to 8)
• Prior to performing the following procedures, remove the side
panels L/R.
(1) From the right side of the main body, push the slide cam
and pull the tray assembly out of the main body in the di-
rection of the arrow 1. (See Fig.5.)
(2) Remove the tray fitting from the tray assembly in the direc-
tion of the arrow 2. (See Fig.5.)
(3) From the both sides of the main body, remove the two
screws Cattaching the front panel assembly. (See Figs.6
and 7.)
(4) Release the two claws cand claws dto draw out the front
panel assembly in the direction of the arrow. (See Figs.6
and 7.)
(5) From the right side of the main body, disconnect the card
wire from the connector CN730 on the main board. (See
Fig.8.)
(6) Disconnect the wire from the connector CN270 on the main
board. (See Fig.8.)
(7) Remove the front panel assembly in the direction of the ar-
row. (See Fig.8.)
Fig.5
Fig.6
Fig.7
Fig.8
1
2
Front panel assembly
Slide cam
Tray assembly
Tray fitting
Front panel assembly
Cc
d
Front panel assembly
C
c
d
Front panel assembly
CN270
Main board
CN730Card wire
Wire

(No.MB229)1-9
3.1.3 Removing the top panel
(See Fig.9)
• Prior to performing the following procedures, remove the side
panels L/R and front panel assembly.
(1) From the back side of the main body, remove the screw D
attaching the top panel to the rear panel.
(2) Take out the top panel from the main body.
Fig.9
Top panel
D
Rear panel

1-10 (No.MB229)
3.1.4 Removing the tuner
(See Figs.10 and 11)
• Prior to performing the following procedures, remove the side
panel L.
(1) From the back side of the main body, remove the two
screws Eattaching the tuner to the rear panel. (See
Fig.10.)
(2) Disconnect the card wire from the connector CN1 on the
tuner. (See Fig.11.)
Fig.10
Fig.11
E
Rear panel
Card wire
CN1
Tuner

(No.MB229)1-11
3.1.5 Removing the rear panel
(See Fig.12)
• Prior to performing the following procedures, remove the side
panels L/R.
(1) From the back side of the main body, remove the twelve
screws Fattaching the rear panel.
(2) Release the engagement sections eand remove the rear
panel.
Fig.12
3.1.6 Removing the video board
(See Fig.13)
• Prior to performing the following procedures, remove the side
panels L/R and rear panel.
(1) From the forward side of the video board, disconnect the
card wires from connector CN300.
(2) Disconnect the wire to the connector CN301 on the video
board.
Fig.13
Rear panel
F
ee
F
Video boardCN300
CN301

1-12 (No.MB229)
3.1.7 Removing the fan
(See Fig.14)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top panel and rear panel.
(1) From the front side of the main body, remove the two
screws Gattaching the fan bracket to the heat sink B.
(2) Remove the two screws Hattaching the fan to the fan
bracket.
Reference:
• Remove the tuner and video board as required. (See
Figs.10, 11, and 13)
• When attaching the screws H, attach the wire holders with
them.
Fig.14
3.1.8 Removing the main board
(See Fig.15)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top panel, tuner, rear panel
and video board.
(1) From the right side of the main body, remove the two
screws Jattaching the main board.
(2) Remove the main board toward this side and disconnect
the connector CN200 on the main board.
(3) From the forward side of the main board, disconnect the
card wires from the connectors (CN210, CN220, CN720).
Fig.15
Heat sink B
G
Fan bracket
H
Fan bracket
Fan
H
Wire holders
JJ
CN200
Card wire CN220
CN720
Main board
CN210

(No.MB229)1-13
3.1.9 Removing the power supply board
(See Fig.16)
• Prior to performing the following procedures, remove the side
panel L and rear panel.
(1) From the left side of the main body, remove the screw Kat-
taching the power supply board.
(2) Remove the power supply board toward this side and dis-
connect the connector CN104 on the power supply board.
(3) From the forward side of the power supply board, discon-
nect the wires from the connectors (CN101, CN102,
CN103).
Reference:
When attaching the power supply board, insert the section fof
the power supply board in the hole of the bottom chassis be-
fore attaching the screw K.
Fig.16
3.1.10 Removing the power amplifier board
(See Fig.17)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top panel, tuner, rear panel,
video board and main board.
(1) From the top side of the main body, remove the four screws
Lattaching the power amplifier board.
(2) From the forward side of the power amplifier board, discon-
nect the card wire from the connector (CN404).
(3) Lift the power amplifier board and remove it from the en-
gagement sections (g, h) of the shield case.
(4) Remove the power amplifier board toward this side and
disconnect the connector CN403 on the power amplifier
board.
Fig.17
Power supply board
CN103
CN102
CN101
CN104
K
f
Power amplifier board
CN403 CN404
h
g
L
L
Shield case

1-14 (No.MB229)
3.1.11 Removing the heat sink and heat sink B
(See Figs.18 and 19)
• Prior to performing the following procedure, remove the side
panels L/R, front panel assembly, top panel, rear panel and
fan.
(1) From the top side of the main body, remove the two screws
Mattaching the heat sink on the power amplifier board.
(See Fig.18.)
(2) From the side of the power amplifier board, remove the two
screws Nattaching the heat sink. (See Fig.18.)
(3) From the front side of the main body, remove the three
screws Pattaching the heat sink B. (See Fig.19.)
Reference:
Remove the tuner and video board as required.(See Figs.10,
11 and 13.)
Fig.18
Fig.19
Heat sink
Power amplifier board N
M M
P
Heat sink B

(No.MB229)1-15
3.1.12 Removing the DVD mechanism assembly
(See Figs.20 and 21)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top panel, tuner, rear panel,
video board, main board and power supply board.
(1) From the top side of the main body, remove the four screws
Qattaching the shield case to the bottom chassis. (See
Fig.20.)
Reference:
When attaching the shield case on the bottom chassis,
align the projections (i, j, k, m) of the bottom chassis in
the holes of the shield case. (See Fig.20.)
(2) Take out the shield case with the power amplifier board
from the bottom chassis. (See Fig.20.)
(3) Remove the three screws Rattaching the DVD mechanism
assembly to the bottom chassis. (See Fig.21.)
Fig.20
Fig.21
Bottom chassis
Q
Q
Q
k
j
m
i
Shield case
Power amplifier board
DVD mechanism assembly
Bottom chassis
R
R

1-16 (No.MB229)
3.1.13 Removing the power transformer
(See Figs.22 and 23)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top panel, rear panel and
main board.
(1) From the forward side of the power supply board, discon-
nect the wires from the connectors (CN102, CN103). (See
Fig.22.)
Reference:
Remove the tuner , video board and the power supply
board as required. (See Figs.10, 11, 13 and 16.)
(2) From the top side of the main body, remove the four screws
Sattaching the power transformer to the bottom chassis.
(See Fig.23.)
Fig.22
Fig.23
CN102 CN103
Power supply board
S
S
S
Power transformer Bottom chassis

(No.MB229)1-17
3.1.14 Removing the FL board
(See Fig.24)
• Prior to performing the following procedures, remove the side
panels L/R and front panel assembly.
(1) From the inside of the front panel assembly, remove the
four screws Tattaching the FL board.
(2) Take out the FL board from the front panel assembly and
disconnect the card wire from the connector CN751 on the
FL board.
Reference:
When attaching the FL board, align the projections nof the
front panel assembly in the holes of the FL board.
Fig.24
CN751
Card
wire
FL board
n
TT
T
T
n
Front panel assembly

1-18 (No.MB229)
3.1.15 Removing the switch board
(See Figs.25 and 26)
• Prior to performing the following procedures, remove the side
panels L/R and front panel assembly.
(1) From the front side of the front panel assembly, pull out the
volume knob in to the direction of the arrow. (See Fig.25.)
(2) From the inside of the front panel assembly, remove the
ten screws Uattaching the switch board. (See Fig.26.)
(3) Take out the switch board from the front panel assembly
and disconnect the card wire from the connector CN760 on
the switch board. (See Fig.26.)
Reference:
When attaching the switch board, align the projections pof the
front panel assembly in the holes of the switch board. (See
Fig.26.)
Fig.25
Fig.26
Volume knob
Front panel assembly
CN760
Card wire U
p
p
U
U
Switch board

(No.MB229)1-19
3.1.16 Removing the headphone jack board
(See Fig.27)
• Prior to performing the following procedure, remove the side
panels L/R and front panel assembly.
(1) From the inside of the front panel assembly, remove the
screw Vattaching the headphone jack board.
Reference:
After attaching the headphone jack board, fix the wire with the
spacer.
Fig.27
Spacer
Headphone jack board
VFront panel assembly
Wire

1-20 (No.MB229)
3.2 DVD mechanism section
• Prior to performing the following procedures, remove the DVD mechanism assembly from the main body.
(See "3.1.12 Removing the DVD mechanism assembly".)
3.2.1 Removing the tray assembly
(See Figs.1 to 3)
(1) From the right side of the DVD mechanism assembly, push
the slide cam and pull the tray assembly out of the DVD
mechanism assembly in the direction of the arrow. (See
Fig.1.)
(2) From the top side of the DVD mechanism assembly, re-
move the two screws Aattaching the leaf spring to the
bushing and remove the leaf spring. (See Fig.2.)
(3) Remove the bushing of the tray assembly from the projec-
tion aon the DVD mechanism assembly and move the tray
assembly in the direction of the arrow. (See Fig.3.)
(4) Remove the claw bof the tray assembly from the DVD
mechanism assembly and take out the tray assembly. (See
Fig.3.)
Fig.1
Fig.2
Fig.3
Tray assembly DVD mechanism assembly
Slide cam
Bushing
Leaf spring
A
DVD mechanism assembly
Bushing
Claw b
Projection a
Tray assembly
DVD mechanism assembly