JVC AX-F1GD User manual

JVE
AX.FlGD
Contents
SofetyPrecoutions
Instruction Booh
Descriptionof Major ICs
Disas
ssembly
Procedures
1-2
1-3
1-11
1-14
Area Suffix
BS .... theU.K.
EF .... ContinentalEurope
ExceptGermany
andltaly
EN.... NordicCountris
G ..... Germany
Gl ltaly
US
.... Singapore
UT.... Taiwan
UB.... HongKong
U .... . OtherArea
Adjustment Procedures... . 1-16
Bloch Diagroms 1-17
Schematic Di.ogroms Insertion
Printed.Circuit Boords Inseftion
Parts List Seporate-uolume
Insertion
No.2O548
Sep.1995

AX-FIGD
SafetyPrecautions
1.
The design
of this productcontainsspecialhardwareand manycircuitsand components
specially
for safety
purposes.
For
continued
protection,
no changesshouldbe madeto the
originaldesign
unlessauthorizedin writing by the manufacturer.
Replacement
parts
must
be identical
to those used in the original circuits. Servicesshould be performedby
qualifiedpersorlnel
only.
2.Alterations
of the designor circuitry
of the productshouldnot be made. Any design
alterations
of the product
should
not be made. Any designalterations
or additionswill
voidthe manufacturer's
warranty
and will further relievethe manufacture
of responsibility
for perconal
injury
or property
damageresultingtherefrom.
3.Many electrical and mechanical parts in the products have special safety-related
characteristics.These
characteristics
are often not evident from visual inspectionnor can
the protection
afforded by them necessarily
be obtainedby usingreplacement
components
ratedfor higher voltage,wattage, etc. Replacement
partswhich havethesespecialsafety
characteristics
are identifiedin the PartsList of ServiceManual. Electrical
components
having
such
features
are identified
by shadingon the schematics
and by (A) on the Parts
Listin the ServiceManual. Theuse
of a substituterepalcement
whichdoesnot havethe
same
safetycharacteristics
asthe recommended
replacement
parts
shownin the Parts
Listof
Service
Manualmay
createshock,fire,or otherhazards.
4.
The leadsin the products
are routedand dressedwith ties,
clamps,tubings,
barriercand
the like
to be separatedfrom liveparts,
hightemperature
parts,
moving
parts
and/orsharp
edgesfor the prevention
of electricshock
and fire hazard. Whenserviceis required,
the
originalleadroutingand dressshould
be observed,and it shouldbe confirmedthat they
have
beenreturnedto normal,after re-assembling.
5.Leakage
currnet
check
(Electrical
shockhazardtesting)
After re-assembling
the product,
always
performan isolation
check
on the exposedmetal
parts
of the product
(antenna
terminals,
knobs,metal
cabinet,screwheads,
headphone
jack,
contorl shafts,etc.)to be surethe product is safeto operatewithout danger of electrical
shock.
Do not use
a lineisolation
transformer
duringthischeck.
o Plugthe AC line cord directlyinto the AC outlet. Usinga "Leakage
CurrentTester",
measure
the leakage
currentfrom each
exposedmetalparts
of the cabinet,
particularly
any exposedmetal part having a return path to the chassis,to a known good earth
ground. Any leakage
currentmust
not exceed0.5mAAC(r.m.s.).
o Alternatecheckmethod
Plug
the AC line cord directlyinto the AC outlet. Usean AC voltmeterhaving,
I,OOO
ohmsper volt or more sensitivityin the following manner. Connect
a 1,500Q 10 W
resistor
paralleled
by a 0.15
pFAC-type
capacitor
between
an exposedmetalpart and a
known
goodearth
ground.
Measurethe AC voltage acrossthe resistor
with the ACvoltmeter.
Movethe resistor
connection
to eachexposed
metal
part,particularly
anyexposedmetalpart
having a return path to the chassis,and
meausre
the AC voltage acrossthe resistor.
Now, reverse
the plug in the AC outlet and
repeat each measurement. Any voltage
measured
must not exceed
0.75VAC (r.m.s.).
This
corresponds
to 0.5mAAC(r.m.s.).
AC VOLTMETER
(Having
1000
ohms/volts,
or more sensitivity.)
1s000
10w
Placethis
probe on
each exposed
metal part.
Good earth ground
lspF
ACTY
1.
This
equipmenthas
been
designedand manufactured
to meetinternational
safety
standards.
2.lt is
the legal
responsibility
of the repairer
to ensurethat these
safetystandards
are
maintained.
3.Repairsmust
be made
in accordance
with the relevant
safety
standards.
4.lt is
essentialthat safety
critical
componentsarereplaced
by approved
parts.
5.lf mains
voltage
selectorisprovided,
checksetting
for localvoltage.
1-2
Warning

N(-FlGD
7
Description
of lCs
I MN171ZO2JGL(lCs01)
:SYSTEMCONTROLLER
1.TerminalLayout
VDD
CDIND
TUNERIND
TAPEIND
MDIND
PHONOIND
AUXIND
POWERONIND
VOTUMEIND
DIRECTIND
SOUND
IND
osctN
oscour
GNO
POWERON
SPK.RELAY
MUTE
DIRECTON/OFF
SOUND
ON/OFF
VOL.DOWN
VOL UP
H.P.IN
PROTECT-IN
INH
RM.IN
RESET
DATA
SIB
SCLK
SOURCE5EL-2
SOURCESEL-1
SOUNDKEY
IN
T
v
v
DCSIN
DCS.OUT
DIRECTKEYIN
POWER
KEYIN
2. Functions
u
63
62
6l
60
s9
58
s7
56
55
54
s3
52
51
50
49
48
47
46
45
4
43
42
41
/O
39
38
37
36
35
34
33
1
2
3
4
5
5
7
8
9
10
11
l2
13
t4
l5
16
17
18
r9
20
21
22
23
24
25
26
27
28
29
30
31
32
Pin
No. Symbol r/o Function Pin
NO. Symbol t/o Function
1VDD Power supply 33 SOUNDKEY
IN SOUND key input
2CDIND oCD indicator control 34 Connect
to GND
3TUNERIND oTUNER
indicatorcontrol 3s Connectto GND
4TAPEIND oTAPEindicator control 36 Connect
to GND
5MDIND oMD indicator control 37 SOURCESEL-I ISourceselectcontrol
6PHONOIND oPHONOindicator control 38 SOURCESEL-z ISourceselect control
7AUXIND oAUX indicator control 39 Connect
to GND
8PC'WEROI{ IND oPOWERON indicator control 40 SCLK oClockoutput for 1C201
9VOLUMEIND oVOLUMEindicator control 41 STB oStrobesiqnalfor 1C201
10 DIRECTIND oCD DIRECTindicator control 42 DATA oData for 1C201
11 SOUNDIND oSOUNDindicator control 43 RESET IResetsiqnal input
12 Pullup MRM.IN IRemote control siqnal input
13 Pullup 45 INH IInhibitsiqnal input
14 Pullup 46 PROTECT-IN IDetection for protector
15 Pullup 47 Connectto GND
16 Pullup 48 Connectto GND
17 Pullup 49 Connect to GND
18 GND GND 50 Connectto GND
19 Pullup 51 H.P.IN IHeadphonein siqnal input
20 Pullup 52 VOL.UP oVolume control siqnal
21 Pullup s3 VOL.DOWN oVolume control siqnal
22 Pullup 54 SOUNDON/OFF oPresencecontrol siqnal
23 Pullup 55 DIRECTON/OFF oCDdirect control siqnal
24 Pullup s6 MUTE oSourcemute control siqnal
25 Pull
up 57 SPK.RELAY oSpeaker
relavcontrol siqnal
26 Pull
up 58 POWER ON oRequlatorcontrol siqnal
27 DCS-|N ICompulinksignalinput 59 Connect
to GND
28 DCS-OUT oCompulinksiqnaloutput 60 Connectto GND
29 Pull
up 61 Not used
30 Pull up 62 GND GND
31 DIRECTKEYIN ICD DIRECT
key input 63 oscour oClockoscilatoroutput
32 POWERKEYIN IPOWERkey input uoscrN IClockoscilatorinput

Limiter
A)(-FlGD
t GPlU501X(1C502)
: Receiverfor remote controller
I 181639-CV(1C351):Motor Driver
1.
TerminalLayout
tNl
GND
Vcont
tN2
3. Functions
OUT
1
Vcc
NC
OUT2
2. BlockDiagram
tNl -l
-J
cc
f
f
s
1-12
tNl rN2 OUT1 OUT2 MOTOR
HLHLcLocKwtsE
LHLHCOUNTER.CLOCKWISE
H H OFF OFF WAITING
LLOFF OFF WAITING

N(-FlGD
I VCs022-2(tC7s1)
:SUPER
1.Terminal
Layout
123456789
Thermal
Compensation
VC4580DD
(lCl
01,231,361,301)
:Dual
OPamp.
NJM4558
(1C352,363)
:Dual
OPamp.
BlockDiagram
r---- Super-A !
2.
v
Thermal
Compensation
7
F
A OUT
A _IN
A +IN
-vcc
+Vcc
BOUT
^
B -IN
B +IN
v
1-13

AX.FIGD
Disassembly Proced
ures
(1) Removing
the top cover
t. Remove 2screws @ fastening both sides
of top cover, and 4 screws @ fastening
the rear side.
2. Remove the top cover.
f
@xz @x4
(2) Removing
the Front PanelAssembly
1. Remove the top cover.
2. Disconnect the connectorPA360.
3. Pull out the Master volume knob, Tleble knob, Bass knob and Balance knob.
4. Remove the nut fastening the Master volume, Bass and Balance.
5. Disconnect the connectors(PA790,P202,P203,BC500)
6. Remove 3 screws @ and 3 hook O fastening bottom of the front panel assembly.
% Mastervolume
konb
Bass,Treble
&
Balancekonb
(3) Removingthe Control PCB (ENH-272-3)
1. Remove the top cover.
2. Remove the front panel assembly.
3. Pull out the source selector knob and remove
the nut fastening the source selector.
4. Remove 8screws @ fastening the control PCB
to remove it.
@ sDsG3008N @ GBSG3008CC @ SDSF2508Z
1-14
,(s
$

v
v
F
7
7
1-1
5
A)(.F1GD
(5)1
2
3
4
5
6
7
(4) Removing
the Input & SelectorPCB
(ENH-272-2)
1. Remove the top cover.
2. Disconnect the connectors P2O2and P203.
3. Remove 7screws @ and @ fastening the input & Selector PCB to remove it.
(5) Removing
the Powersupply PCB
(END-099)
1. Removethe top eover.
2. Remove 3 screws @ fastening the power supply PCB to remove it
Removing
the Main PCB
(ENH-272-1)
Remove the top cover.
Remove the front panel assembly.
Remove the volume PCB, balance PCB, power supply PCB and pre-driver PCB
Remove 2 screws @ fastening the main PCB.
Remove 4 screws @ fastening the heat sink.
Remove 2 screws @.
Remove the main PCB with heat sink.
ENH-272-10
@x+
(DX
2
@xs*
---___,,/
END-099-2 @x2 \
\ --).
@x4
ENE-095-1
lA>
IBTOOz
@x2 ENH-272-6
T-1
END-099
@ GBsc3ooscc @ E732n-ao3 @ E74266-oo2
'w
;'"*:-78
i
&

A)(-FlGD
ADJUSTMENTPROCEDURES
I ldlingCurrent
(1) Set the volume control to minimum during this adjustment.
(2) T\En R?51 anil R?52 fully counterclockwisebefore the power ie switch on.
(3) Always start fmm cold, and allow 5 minutes to warm up beforeadjustment.
If the hegtsink is already warm fiom previous use the conect adjustuent can not be made.
(4) Connecta DC voltmeter to R771 resietor's leads for left channel, or ta F"772for right channel.
(5) Adjust R751for Ieft channel, or R752 for right channel, so that the DC voltneter becomes
4.5
mV - 15mV.
1-16

AX-FIGD
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AX.FIGD
^
^
JVE
VICTOR
COMPANY
OFJAPAN,LIMITED
AUDIO DIVISION,
YAMATOPLANT,
1644,SHIMOTSURUMA,
YAMATO.
SHI
,KANAGAWA.KEN
,
242,JAPAN
PrintedinJapan
9509(S)
(No.20548)