JVC FSH-30 Service manual

SERVICE MANUAL
COMPACT COMPONENT SYSTEM
2206220035
FS-H30
COMPACT COMPONENT SYSTEM
Area Suffix
J -------------------- U.S.A. C ------------------ Canada
TABLE OF CONTENTS
2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.22062
2003/5
SPECIFICATION
Amplifier Output Power 20 W (10 W + 10 W) at 4 (10% THD)
12 W per channel, min. RMS, driven into 4 at from 80 Hz to 15 kHz with no more than
10% total harmonic distortion. Audio input sensitivity/Impedance (at 1 kHz) AUX 500 mV/48.75 k Speakers/Impedance 4
Tuner FM tuning range 87.5 MHz - 108.0 MHz
AM tuning range 530 kHz - 1 710 kHz
CD player Dynamic range 85 dB
Signal-to-noise ratio 90 dB Wow and flutter Immeasurable
Cassette deck Frequency response Normal (type I) 50 Hz - 15 000 Hz
Wow and flutter 0.15% (WRMS)
Speaker Speaker units Full range 8.0 cm (3 3/16 in.) cone × 1
Impedance 4 Dimensions (approx.) 135 mm × 203 mm × 190 mm (W/H/D)
(5 3/8 in. × 8 in. × 7 1/2 in.) Mass (approx.) 1.7 kg (3.8 lbs) each
General Power requirement AC IN 120, 60 Hz
DC IN 12 V, 4 A
Power consumption 35 W (at operation)
3.0 W (on standby)
Dimensions (approx.) 412 mm × 208 mm × 275 mm (W/H/D)
(16 1/4 in. × 8 1/4 in. × 10 7/8 in.) Mass (approx.) 6.5 kg (14.4 lbs)
Design and specifications are subject to change without notice.
1-2 (No.22062)
1.1 Safety Precautions
Good earth ground
d
AC VOLTMETER
SECTION 1
Precautions
(1) This desi gn of this pro duct contains special hardware a nd
many circuits and components specially for safety purpos­es. 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 per­formed by qualified personnel only.
(2) Alte rations 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 characteris­tics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by us­ing replacement components rated for higher voltage, watt­age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Ser­vice 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 charac­teristics 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 reassem­bling.
(5) Leaka ge shock hazard testing
After reassembling the product, always perform an isola­tion check on the exposed metal parts of the product (an­tenna 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, particular­ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur­rent 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, 1,000 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15µF AC-type capacitor between an ex­posed 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 0.5µ mA AC (r.m.s.).
(Having 1000 ohms/volts, or more sensitivity)
0.15 F AC TYPE
Place this probe on
1500 10W
1.2 Warning
(1) Thi s 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 essentia l 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 pre­forming 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 a re 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)
each expose metal part.
(No.22062)1-3
1.5 Importance administering point on the safety
C901
D901
C902
B909
B910
C903
C904
D903
D902
D904
B911
B912
B913
B914
B908
B907
R901
J901
B902
J902
B901
PP901
D905
Z903
B916
Z913
L901
B903
S901
CN901
B915
Z902
Z912
T901
Z911
B904
Z901
Caution: For continued protection against risk of fire, replace only with same type 1A/125V for F901, 6.3A/125V for F902 and F903. This symbol specifies type of fast operating fuse.
1-4 (No.22062)
Precaution: Pour eviter risques de feux, remplacez le fusible de surete de F901 comme le meme type que 1A/125V, et 6.3A/125V pour F902 et F903. Ce sont des fusibles suretes qui functionnes rapide.
^
1.6 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.
1.6.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. 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 conducti ve 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.
(caption) Anti-static wrist strap
1M
Conductive material (conductive sheet) or iron palate
(3) Handling the optical pickup
• In order to maintain quality during transport and before insta llation, both sides of the lase r diode on the replacement o ptical 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.
1.7 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 adju s t the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.8 Attention when traverse unit is decomposed *Please refer to "Disassembly method" in the text for the CD pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connector CN101 on the CD servo board. (If the flexible wire is disconnected without applying solder, the CD 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.
Flexible wire
Shorting round
Shorting round
CN601 on mechanism board
(No.22062)1-5
1.9 Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The compact disc player uses invisible laser
radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are de
feated. It is dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
!
Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.
REPRODUCTION AND POSITION OF LABEL and PRINT
WARNING LABEL and PRINT
1-6 (No.22062)
Caution label
SECTION 2
A
A
A
Disassembly method
2.1 Main body
2.1.1 Removing the rear panel
(See Fig.1,2)
(1) From behind the body, remove the eight screws A attach-
ing the rear panel.
(2) Turing the body upside down, remove the two screws B at-
taching the rear panel, and remove.
A
Fig.1
Rear panel
BB
CC
Front panel assembly
Fig.2
(No.22062)1-7
2.1.2 Removning the side panel (L) and (R) (See Fig.2~5)
• Prior to performing the following procedure, remove the rear
panel. (1) Turning the body upside down, remove the two screws C
attaching the front panel assembly.
(2) Turnin g the body initial position, open the CD door while
pressing the upper OPEN button.
(3) Moving the side panel (L) in the arrow direction, remove the
panel from the left side of the body.
(4) Moving the sid e panel (R) in the arrow direction, remove
the panel from the right side of the body.
Side panel (L)
Fig.4
Fig.3
Side panel (R)
Fig.5
1-8 (No.22062)
2.1.3 Removing the CD player assembly
(See Fig.6,7)
• Prior to performing the following procedure, remove the rear
panel and the left and right side panels. (1) Disconnect the card wires from the two connectors CN603
and CN604 on the CD servo control board.
(2) Remove the two screws D attaching the front panel assem-
bly on the both sides.
(3) Release the two joints a on the both sides of the front panel
assembly.
(4) Move the CD player assembly in the direction of the arrow.
CD player assembly
a
D
CD servo control board
CN604
CN603
Fig.6
CD player assembly
a
Fig.7
D
(No.22062)1-9
2.1.4 Removing the power amplifier board and heat sink (See Fig.8~10)
• Prior to performing the following procedure, remove the rear
panel, the left and right side panels, and the CD player assem­bly. (1) Remove the five screws E and F attaching the heat sink. (2) Disconne ct the wire from connector CN901 on the power
supply board.
(3) Disconnect the card wire from connector CN305 on the
power amplifier board. (4) Remove the screw G attaching the power amplifier board. (5) Disconne ct the connector CN301 on the power amplifier
board, and release the two joints b.
REFERENCE:
Remove the screw F, then power amplifier board can be re­moved without removing heat sink.
Power amplifier board
CN301
Heat sink
Fig.8
F
E
E
Power supply board
CN901
Fig.9
Power amplifier board
bb
G
Fig.10
CN305
1-10 (No.22062)
2.1.5 Removing the tuner board (See Fig.11)
• Prior to performing the following procedure, remove the rear
panel, the left and right side panels, and the CD player assem­bly. (1) Remove the screw H attaching the tuner bo ard from the
right side of the body.
(2) Disconn ect the card wire from the connector CN1 on the
tuner board.
(3) Release the joint c, and remove the tuner board backward.
2.1.6 Removing the front panel assembly (See Fig.12,13)
• Prior to performing the following procedure, remove the rear
panel the left and right side panels, the CD player assembly, the power amplifier board. (1) Disconnect the card wire from the connector CN714 on the
LCD system CPU board.
(2) Release the joint d on the bottom of the front panel assem-
bly using a screwdriver, and remove the front panel assem­bly toward the front.
c
CN1
H
Tuner board
Fig.11
d
Front panel assembly
LCD system CPU board
CN714
Fig.12
Fig.13
(No.22062)1-11
2.1.7 Remove the power transformer and power supply board (See Fig.14,15)
• Prior to performing the following procedure, remove the rear
panel, the left and right side panels, the CD player assembly, the power amplifier board and the tuner board. (1) Remove the screw I attaching the jack holder and release
joint e, and then remove jack holder.
(2) Remove the four screws J attaching the power transformer
and power supply board.
e
Jack holder
I
Fig.14
Power supply board
J
Fig.15
Power transformer
J
1-12 (No.22062)
2.1.8 Remove the cassette mechanism assembly
(See Fig.16,17)
• Prior to performing the following procedure, remove the front
panel assembly. (1) Disconnect the card wire from the connector CN713 on the
LCD system CPU board.
(2) Remove the four screws K an d L attaching the cassette
mechanism assembly, and remove.
Front panel assembly
CN713
LCD system CPU board
Fig.16
K
L
Cassette mechanism assembly
Fig.17
(No.22062)1-13
2.1.9 Remove the LCD system CPU board (See Fig.18)
(1) Disconnect the wire from the connector CN716 on the LCD
system CPU board.
(2) Release the two joints f and pull out the LCD system CPU
board.
f
CN716
2.1.10 Removing the operating switch board (See Fig.19,20)
• Prior to performing the following procedure, remove the front
panel assembly, the cassette mechanism assembly and the LCD system CPU board. (1) Remove the two screws M attaching the operating switch
button.
(2) Remove the two screws N attaching the operating switch
board, and remove.
M
Operating switch button
LCD system CPU board
Fig.18
N
Operating switch board
Fig.20
1-14 (No.22062)
Fig.19
2.2 Cassette mechanism assembly
2.2.1 Removing the Play/Record & Clear head
(See Fig.1~3)
(1) While movin g the trigger arm on the right side of th e head
mount in the direction of the arrow, turn the flywheel R counterclockwise until the head mount comes ahead and clicks.
(2) The head turns counte rclockwise as you turn the flywhe el
R counterclockwise (See Fig.2 and 3).
(3) Disconn ect the flexible wire from connector CN31 on the
head amplifier & mechanism control board. (4) Remove the spring from the back of the head. (5) Loosen the azimuth screw for reversing attaching the head. (6) Remove the head on the front side of the head mount.
Cassette mechanism assembly
Fig.1
Head
Fly wheelR
Trigger armHead mount
Flexible wire
Fly wheel R
Fig.2
Azimuth screw
Head
for reversing
Spring
CN31
Head amplifer & mecha control board
Fig.3
(No.22062)1-15
2.2.2 Removing the head amplifier & mechanism control board (See Fig.4)
(1) Turn o ver the cassette mechanism asse mbly and remove
the three screws A attaching the head amplifier & mecha­nism control board.
(2) Disconne ct the flexible wire from connector CN31 on the
head amplifier & mechanism control board.
(3) Disconnect connector CN32 of the head amplifier & mech-
anism control board from connector CN1 on the reel pulse board.
REFERENCE:
If necessary, unsolder the 4-pin wire soldered to the main mo­tor.
Head amplifier & mecha control board
AA
CN32
4pin wire
2.2.3 Removing the main motor (See Fig.4~7)
(1) Remove the two screws B. (2) Half raise the motor and remove the capstan be lt from the
motor pulley.
ATTENTION:
Be careful to keep the capstan belt from grease. When reas­sembling, refer to Fig.6 and 7 for attaching the capstan belt.
Main motor assembly
Capstan belt
CN31
Flexible wire
A
B
Main motor assembly
Fig.4
Main motor assembly
Motor pulley
1-16 (No.22062)
Fig.5
Capstan belt
Capstan belt
Fig.6
Main motor assembly
Fly wheel
Motor pulley
Fig.7
2.2.4 Removing the flywheel
(See Fig.8, 9)
• Prior to performing the following procedure, remove the head
amplifier & mechanism control board and the main motor as­sembly. (1) From the front side of the cassette mechanism, remove the
slit washers attaching the capstan shaft L and R. Pull out the flywheels backward.
Fly wheel R Fly wheel L
Fig.8
2.2.5 Removing the reel pulse board and solenoid
(See Fig.10)
• Prior to performing the following procedure, remove the head
amplifier & mechanism control board. (1) Remove the screw C. (2) Release the tab a, b, c, d and e retaining th e reel pulse
board.
(3) Release the tab f and g attaching th e solenoid on the reel
pulse board.
(4) The reel pulse board and the solenoid come off.
Fly wheel R
Capstan shaft R Capstan shaft L
Slit washer
Fig.9
Fly wheel L
bc
a
Solenoid
g
f
d
Reel pulse board
C
e
Fig.10
(No.22062)1-17
2.2.6 Reattaching the Play/ Record & Clear head
r
r
(See Fig.11~13)
(1) Reattaching the head mount assembly.
a) Change front of the direction cover of the head mount
assembly to the left (Turn the head forward).
b) Fit the bosses O', P', Q', U' and V' on the head mount
assembly to the holes P and V, the slots O, U and Q of the mechanism sub assembly (See Fig.11 to 13).
CAUTION:
To remove the head mount assembly, turn the di­rection cover to the left to disengage the gear. If the gear can not be disengaged easily, push up the boss Q' slightly and raise the rear side of the head mounts slightly to return the direction lever to the
reversing side. (2) Tighten the azimuth screw for reversing. (3) Reattach the spring from the back of the Play / Record &
Clear head.
(4) Connect the flexible wire to connector CN31 on the head
amplifier & mechanism control board.
U' Q'
Head mount assembly
Head mount assembly
O'
Fig.11
P'
P'
V'
V'
Direction cove
O
P
Q
V
Head
Spring
Flexible wire
U
Fig.12
Azimuth screw for reversing
Direction cove
Head mount
1-18 (No.22062)
CN31
Fig.13
Head amplifier &
mechanism control board
3.1 Adjustment method
V
SECTION 3
Adjustment
Measurement Instruments Required for Adjustment
1. Low frequency oscillator This oscillator should have a capacity to output 0dBs to 600 at an oscillation frequency of 50Hz-20kHz.
2. Attenuator impedance : 600
3. Electronic voltmeter
4. Distortion meter
5. Frequency counter
6. Wow & flutter meter
7. Test tape VT703L : Head azimuth VT712 : Tape speed and running unevenness (3kHz) VT724 : Reference level (1kHz)
8. Blank tape TYPE : AC-225 TYPE : AC-514
9. Torque gauge : For play and back tension FWD(TW2111A), REV(TW2121a) and FF/REW(TW2231A)
10. Test disc: CTS-1000
Measurement conditions
Power supply voltage AC 120V ~ , 60Hz Reference output : Speaker : 0.775V/4 : Headphone : 0.077V/32 Reference frequency and input level ------------------------------ 1kHz, AUX : -8dBs Measurement output terminal ------- at Speaker J3002 Load resistance --------------------------- 4
Radio Input signal
AM frequency --------------------------------------- 400Hz AM modulation ---------------------------------------- 30% FM frequency --------------------------------------- 400Hz FM frequency deviation ------------------------ 22.5kHz
Tuner section
FM tuning range: 87.5MHz~108.00MHz AM tuning range: 530kHz~1,710kHz
Voltage applied to tuner +B : DC5.7V VT : DC 12 Reference measurement output 26.1mV(0.28V)/3 Input positions AM : Standard loop antenna FM : TP1 (hot) and TP2 (GND)
Standard measurement position of volume
Function switch to Tape Beat cut switch to Cut Super Bass/Active hyper Bass to OFF Bass Treble to Center Adjustment of main volume to reference output VOL : 28
Precautions for measurement
1. Apply 30pF and 33k to the IF sweeper output side and 0.082 F and 100k in series to the sweeper input side.
2. The IF sweeper output level should be made as low as possible within the adjustable range.
3. Since the IF sweeper is a fixed device, there is no need to adjust this sweeper.
4. Since a ceramic oscillator is used, there is no need to perform any MIX adjustment.
5. Since a fixed coil is used, there is no need to adjust the FM tracking.
6. The input and output earth systems are separated. In case of simultaneously measuring the voltage in both of the input and output systems with an electronic voltmeter for two channels, therefore, the earth should be connected particularly carefully.
7. In the case of BTL connection amp., the minus terminal of speaker is not for earthing. Therefore, be sure not to connect any other earth terminal to this terminal. This system is of an BTL system.
8. For connecting a dummy resistor when measuring the output, use the wire with a greater code size.
9. Whenever any mixed tape is used, use the band pass filter (DV-12).
(No.22062)1-19
3.2 Cassette mechanism adjustment
Head azinuth adjustment screw (Forward side)
Mecha control board
Head azinuth adjustment screw (Reverse side)
SW1
SW2
Head azinuth adjustment screw (Forward side)
Head azinuth adjustment screw (Reverse side)
CN31
R/P head, Erase head
P1
D1
VR37
R371
CN1
FW100
SW5
Motor speed VR37
BIAS adjust
VR31
C308
R327
VR31
R315
R313
Q302
C316
C319
R314
C121
C221
L301
C314
R104
Q305
C313
D340
C310
R304
R310
C107
L303
R102
R121
R221
R303
R335
R353
R339
R108
C113
R302
Q343
C103
C207
R301
C301
Q342
C304
R208
C105 C205
C106
R306
R106
R101
C104
CN34
C306
Q344
R105
C102
R344
R205
R110
Q345
R345
C307
R336
C340
R346
R206
C206
R107
W1
Q346
R210
R305
C300
C341
C110
R109
R372
Q372
C371
CN33
R116
C109
IC32
CN31
Q371
C101
C374
Q375
R376
R216
C376
R204
R201
C202
C204
C201
CN32
C203
R202
C210
R340
C331
R342
R347
Q347
SW6
R343
R341
IC33
IC1
D375
Q376
R338
R375
R337
C213
C342
C209
W1
R207
1-20 (No.22062)
3.2.1 Mechanism section
Item Condition Measurement method Ref.value
Head azimuth
Test tape : VT703L (8kHz) Output terminal : Speaker out
1.Playback the test tape VT703L (8kHz).
2.Adjust to maximum output level by azimuth adjustment screw for forward side and reverse side.
Maximum output
3.This adjustment is adjust by adjustment screw of forward side and adjustment screw of reverse side.
Tape speed
Test tap : VT712 (3kHz) Output terminal
Playback the test tape VT712 (3kHz) at end of forward side,adjust to 2,940~3,90Hz indication of frequency counter by VR37.
2,940 ~ 3,090Hz
: Speaker out or Headphone out
Adjustment
position
Only adjust at changed head
VR37
Item Condition Measurement method Ref.value
Tape speed
diviation at
FWD/REV
Test tape : VT712 (3kHz) Output terminal
Playback the test tape VT712 (3kHz) at end of forward and reverse, tape speed deviation should be less than 6.0Hz.
Leass than
6.0Hz
: Speaker out or Headphone out
Wow & Flutter Playback the test tape VT712 (3kHz) at
Test tape : VT712 (3kHz) Output terminal
start of forward and reverse,Wow & Flutter are should be less than 0.25%(WRMS).
Less than
0.25% (WRMS)
: Speaker out or Headphone out
Adjustment
position
VR31
(No.22062)1-21
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