JVC AX-Z1010TN User manual

AX-Z1010TN
JVC
SERVICE MANUAL
Contents
Safety Precautions ..........ccccceecceecesseeteneeeneseenees 1-2
Specifications
Operating Instructions..
Description of Technology .
Removal Procedures........ + 1-20
Adjustment Procedures
Description of Major ICs..
Internal Block Diagrams of Other ICs................ 1-30
Block Diagram .. Insertion
Schematic Diagrams... . Insertion
Connection Diagram .. Insertion
Printed Circuit Boards . .. Insertion
Parts List.. . Separate Volume Insertion
No. 20115,
Jun 1989

AX-Z1010TN
- Safety Precautions
1. The design of this product contains special hardware and 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. Service
should be performed by qualified personnel only.
2. Alternations 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 manufacturer's warranty and will further
telieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the product 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 (Ay
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 part 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 re-assembling.
5. Leakage current check (Electric shock hazard testing)
After re-assembling 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 part 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 0.5 mA AC (r.m.s).
@ Alternate check method
Piug the AC line cord directly into the AC outlet. Use an AC voltmeter having 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 2 10 W resistor paralleled by a 0.15 #F AC-type
capacitor between an exposed metal part and
a known good earth ground.
Measure the AC voltage across the resistor with FA Rec 1ooe-cs ar
the AC voltmeter. OF hare sensitivity) “one
H Move the resistor connection to each exposed i i
metal part, particularly any exposed metal part re.
having a return path to the chassis, and measure eames |
the AC voltage across the resistor. Now, ey f ey Place this probe
the plug in the AC outiet and repeat each | i 5A —t- i ~~ on each exposed
measurement. Any voltage measured must not POE RON, metai part.
exceed 0.75 V AC (r.m.s}. This corresponds to Goed earth ground
0.5 mA AC (r.m.s).
; Warning 2 =
. This equipment has been designed and manufactured to meet international safety standards.
. It is legal responsibility of the repairer to ensure that these safety standards are maintained.
. Repairs must be made in accordance with the relevant safety standards.
. It is essential that safety critical components are replaced by approved parts.
. If mains voltage selector is provided, check setting for local voltage.
apwn-
1-2 (No. 20115)

SPECIFICATIONS
CIRCUITRY
Preamplifier : ICL, MC/MM equalizer
with EL-FETs in its
initial stage
Power amplifier “DIGITAL PURE A
TYPE Ir"
“Dynamic Super-A””
power amplifier with
Gm circuit
OVERALL CHARACTERISTICS
Output power
100 watts per channel, min. RMS, both
channels driven into 8 ohms from 20 Hz
to 20 kHz, with no more than 0.004% to-
tal harmonic distortion (U.S.A. and Cana-
da-only)
105 watts per channel, min. RMS, into 8 ohms
at 1 kHz, with no more than 0.002%" total har-
monic distortion (U.S.A. and Canada only)
100 watts per. channel, min. RMS, into 8 ohms
at 1 kHz, with no more than 0.002% total har-
monic distortion (Continental Europe, the U.K.,
Australia and other areas)
100 watts per channel, min. RMS, both chan-
nels driven, into 8 ohms at 1 kHz with no more
than 0.7% total harmonic distortion (DIN) (Con-
tinental Europe, the U.K., Australia and other
areas)
160 watts 1 kHz, 4 ohms 0.7% (DIN) (Con-
tinental Europe, the U.K., Australia and other
areas)
Total harmonic distortion
U.S.A. and Canada
AX-Z1010TN
Signal to noise ratio
PHONO (MM) : 89 dB/73 dB
PHONO (MC) : 71: dB
CO, LINE 1, : 112 dB/73 dB
LINE 2, LINE 3;
DAT 4/TAPE 2,
TAPE 1/DAT 2
(66 IHF/DIN)
U.S.A. and Canada only
PHONO (MM) : 82 dB (Rec Out)
PHONO (MC) : 73 dB (Rec Out)
CD, LINE 7, : 86 dB (Speaker Out)
LINE 2, LINE 3,
DAT 1/TAPE 2,
TAPE 1/DAT 2
(78 IHF)
Bass contro! 10 ~ +5 dB (50 Hz,
MASTER LEVEL
~30 dB)
Recording output
Output level/ : 300 mV/1 kohms
impedance (Analog)
2.0 V/1 kohms
(Digital)
DIGITAL INPUT/OUTPUT
DIGITAL-1 1-23 ~ -14 dBm
DIGITAL-2 : 0.8 Vp-p/75 ohms
DAT REC :-0.5 Vp-p/75 ohms
DAT PLAY : 0.5 Vp-p/75 ohms
O/A CONVERTER SECTION
Sampling : 32 kHz, 44,1 kHz,
frequencies 48 kHz
{Auto selection)
Total harmonic : 0.0035%
distortion (1 kHz)
Dynamic range : 98 dB
(1 kHz)
(co IN > SP, : 0.004% (20 Hz —
UT) 20 kHz, 8 ohms) at
100 waits
(PHONO IN > SP. : 0.009% (20 Hz —
OUT at volume 20 kHz, 8 ohms) at
20 dB) 400 watts
Continental Europe, the U.K., Australia and other
areas
(CD IN + SP.
OUT)
(PHONO IN -+ SP
OUT at volume
—20 dB)
0.004% (20 Hz —
20 kHz, 8 ohms) at
90 watts
: 0.009% (20 Hz —
20 kHz, 8 ohms) at
90 watts
Intermodulation distortion
U.S.A. and Canada
(CD IN + SP,
Out)
004% (60 Hz : 7 kHz
= 4: 1, 8 ohms) at
00 watts
j
Continental Europe, the U.K., Australia and other
areas
(CD IN ~ SP,
OuT)
Power band width
(CD IN > SP.
oun
Frequency response
Damping factor
Input terminals
: 0.004% (60 Hz : 7 kHz
= 4: 1, 8 ohms) at
90 watts
5 Hz — 60 kHz (IHF,
0.03%, 8 ohms both
channels driven)
: 5 Hz to 100 kHz,
+0 dB,
-3 d8/8 ohms
: 200 (4 kHz, 8 ohms)
Input sensitivity/impedance (1 kHz}
PHONO (MM)
PHONG (MC)
CD, LINE 4,
LINE 2, LINE 3,
DAT 4/TAPE 2,
TAPE V/DAT 2
POWER SPECIFICATIONS
: 4 mV/47 kohms
: 300 1V/470 ohms
: 300 mV/30 kohms
Line Voltage & Frequency
Signal-to-noise ratio : 107 dB
EQUALIZER
PHONO overload capacity
(PHONO ~ TAPE 7 RE! out)
TAPE 1 MONITOR on
PHONO (MM) 100 mV (1 kHz,
0.02% THD)
PHONO (MC) : 7 mV (1 kHz, 0.03%
THD)
PHONO RIAA
deviation : £0.2 dB
{20 Hz — 20 kHz)
GENERAL
Dimensions : 435 (W) x 173 (H) x
459 (D) mm
(17-3/16" x 6-13/16" x
18-1/8""
Weight : 16.8 kg (38 Ibs)
Design and specifications subject to change
without notice.
“(measured by JVC Audio Analyzer System)
Power Conumption
USA.
Australia
AC 120V~, 60 Hz 550 watts / 720 VA
Canada __
Continental Europe AC 220 V~, 50 Hz 400 watts
UK AC 240 V~, 50 Hz 860 watts
Other areas
AC 110/127 / 220/240 V ~ selectable, 50/60 Hz 400 watts
(No. 20115) 1-3

AX-Z1010TN
CONNECTION ANSCHLUSS- DIAGRAMME DES
DIAGRAM DIAGRAMM RACCORDEMENTS
Speakers ;
Lautsprecher :
Tumtable Enceintes acoustiques
Plattenspieler Luidsprekers
Tourne-disque Altavoces
Draaitatet Héglalare
Tocadiscos
Skivspelare
CD player
CD-Player
Lecteur de disques compacts
Kompakt diskspeler
Tocadiscos compacto
CD 'spetare
Tuner
Tuner
Syntornseur
Tuner
Sintonizador
Tuner
Hi-Fi VCR
HiFi-Videorecorder Ta “TF
Magnétascope de haute fidétité
Hi-Fi videorecorder
Grabador de videocassettes
Hiti-cleobandspelare
CARTRIDGE C/ mM)
Feo
PuNeD
Hi-Fi VCR
HiFi-Videorecorder
Magnétoscope de haute tidélité
Hi-Fi videorecorder ; ot
Grabador de videocassettes =
Hifi-v:deobandspelare bree
f
i BATI/TAPE2
DAT deck Gs
OA-Tonbandgerat
Enregistreur audionumerique
DAT digital deck a | me -
Magnetofono digital Tare oar da
Digitalkassettdack : ley
Tae deck : -
Kassettendeck For the USA and Canada
Platine d’enregistrement Fur die USA und Kanada
Cassettedeck + Pour les Etats-Unis et le Canada
Magnetéfono Voor de USA en Canada
Kassett bandspelare Para los EE.UU. y Canada
For USA och Kanada
PLINE 2
SIO ol ole
Pune 3
SEA graphic equalizer
Graphischen SEA Equalizers
Egaliseur graphiques SEA
SEA grafische equalizer
Equalizador grafico SEA
SEA gralisk equalizer
OO =
OO f=
9@ Foie sa
Oh 5
fever go Abb. 2
OO Afb. 2
For Continental Europe, the U.K., and Australia II
Fur Europa, GroBbritannien und Australien
Pour |'Europe Continentale, '¢ Royaume-Uni et "Australie
Voor het vasteland van Europa. U.K. en Australié
Para Europa Continental. el Reino Unido y Australia
Fér kontineniala Europa. Storbritannien och Australien
1-4 (No. 20115)

AANSLUITINGS-
DIAGRAM
Speakers
DIAGRAMA DE
CONEXIONES
ANSLUTNINGS-
SCHEMA
CD player
AX-Z1010TN
Lautsprecher
CD-Player
Enceintes acoustiques
Lecteur de disque compacts
Luidsprekers Kompakt diskspeler
Altavoces Tocadiscos compacto
Hégtalare CD-spelare
CD player etc.
CD-Player usw
Optical cable Lecteur de disque compacts etc.
Optikkabels Kompakt diskspeler env.
Cable optique Tocadiscos compacto etc.
$ Optische kabel CD-spelare etc.
Cable optico
Optisk kabel
==
Se S|
Coaxtat cabie
Koaxiatkabels
Cable de coaxiale
Koaxiale kabel
DAT deck
OA-Tonbandgerat
Enregistreur audionumérique
DAT digitaal deck
Cable coaxial Magnetdiono digital
Koaxialkabel Digitalkassettdack
® H .
ae ae F pa
same aGHT
® Q
Note:
When connecting a CD player and a DAT deck that will accommodate COMPU
LINK, use this switch to select which will be made to accommodate COMPU
LINK, a digital system or a analog system
Hinweis:
Beim AnschiuB eines CD-Players und eines DAT-Decks, die mit COMPU
LINK kompatibel sind, geben Sie mit diesem Schalter vor, ob die Verbindung
durch COMPU LINK Uber eine digitale oder eine analoge Anlage hergestellt
werden soll
Remarque:
H Lors du raccordement d'un lecteur de disque audionumérique et d'une platine
: : DAT qui permettent d'utiliser le systeme COMPU LINK, régler ce commutateur
H pour sélectionner le systeme, numérique ou analogique, qui acceptera COMPU.
H LINK.
re Opmerking:
: Bij het aansluiten van een CD-speler en DAT-deck geschikt voor COMPU
LINK, dient met deze schakelaar het systeem te worden gekozen voor COMPU
LINK: digital of analoog.
Nota:
Cuando conecte un reproductor de discos compactos y un magnetdfono DAT
que acomoden e| COMPU LINK, utilice este interruptor para seleccionar cual
} sistema, el digital o el analégico, sera el que acomodara el COMPU LINK.
: Anm.: :
Vid anslutning av en CD-spelare och ett DAT-kassettdack red COMPU LINK, H
skall du anvanda denna omkopplare fér att valja den ljudkalla som skall
anvandas med COMPU LINK. ett digitalt eller anaiogt systern.
Remote cable for “COMPU LINK”
Fernbedienkable fur “COMPU LINK”
Cable de télécommande pour “COMPU LINK" :
Afstandsbedieningskabel voor "COMPU LINK” 4 :
Cable de mondo a distancia para “COMPU LINK" <> =!
Fiarstyrningskabel for "COMPU LINK" :
° ® oO Fig. 1
ee
©
07
-
Oo; ere = @ |
@O™ 11 @
O®@ pe ry) 1o
@©@®
TF
OO rt...
HG a
For other areas
Anderen Gebeite
Pour d'autres pays
Voor andere landen
Para otros paises
For andra lander
(No. 20115) 1-5

AX-Z1010TN
1-6
(No, 20115)
@ GND terminal
@ Phono selector switch (CARTRIDGE
(= MC/ LMM)) — This switch selects be-
tween MC and MM type cartridges. When
depressed, MC is selected, When returned to
the original position MM is selected.
© PHONO terminats
@ CD terminats
@ LINE 1 terminais
@ LINE 2 terminals
@ LINE 3 terminals
@ DAT I/TAPE 2 terminals
@ TAPE 1/DAT 2, SEA terminals
@ AC voltage selector”
When this equipment is used in an area where
the supply voltage is different from the preset
voltage, reset the voltage selector to the cor-
rect position,
@ FUSE holder*
@ SPEAKERS terminals
Connect the speaker cords following the
figures.
@ AC OUTLETS**
UNSWITCHED AC outlets
@ Power cord
C5) Terminals:
DIGITAL 1: Connect the optical digital output
of CD player, etc. Connect the attached opti-
cal fiber cable after removing the connector
cover.
DIGITAL 2: Connect the coaxial digital out-
put of CD player, etc,
DAT REC: Connect the digital input of DAT
deck.
DAT PLAY: Connect the digital output of DAT
deck.
Digital coaxial cable: Use 75 ohm coaxial ca-
ble with RCA pins at both ends to connect the
DIGITAL 2 and DAT terminals.
@ COMPU LINK-1/SYNCHRO terminals
Connect to units provided with a COMPU
LINK-1/SYNCHRO terminal to let the COMPU
LINK contro! system function,
Note:
* COMPU LINK changeover switch
When operating an automatic playback
or a syncronized recording, be sure to
set this switch to the correct position to
perform desired operation.
* Not provided on units for the U.S.A., Cana-
da, Continental Europe, the U.K. and Aus-
tralia.
** Not provided on units for Continental Eu-
rope, the U. K. and Australia.
Notes:
1. Switch the power off when connecting
any component.
2. Connect source components with left
and right channels connected correctly.
Reversed channels may degrade the
stereo effect.
3. Connect speakers with correct polarity;
(+) to (+) and (—) to (—). Reversed
polarity will degrade the stereo effect.
4. Connect plugs or wires firmly. Poor con-
tact may result in hum or damage the
unit.
5. Do not connect equipment requiring
more than the rated. power to the AC
OUTLETS on the rear panel.
6. The AC OUTLETS are not switched off
when the front panei power switch is
switched off.
7. If your turntable has a separate ground
fead, connect it to the GND terminal.
8. Use speakers with the correct im-
pedance within the value indicated on
the rear panel.
9. Connection of digital signal cable
Before connecting the optical cable to
the DIGITAL 1 optical input terminal re-
move the cover from the terminal.
Since optical cable is made of pfastic or
giass material be careful not to bend
sharply.
10. When connected by COMPU LINK the
cassette deck should be connected to
the corresponding TAPE 1/DAT 2 termi-
nats on the amplifier and the DAT deck
should be connected to the correspond-
ing DAT 1/TAPE 2 terminals. Although
it is possible to connect a cassette deck
and a DAT deck with the DAT 1/TAPE 2
terminals and the TAPE 1/DAT 2 termi-
nals respectively, when connecting with
an equipment corresponding to COMPU
LINK of JVC, do not connect the COM-
PU LINK cable with the cassette deck or
the DAT deck.
11. When a JVC’s CD player is connected by
COMPU LINK in digital system, connect
to DIGITAL 1 and CD (analog system) ter-
minats of this unit, and set the COMPU
LINK changeover switch [CD | to “DIGI-
TAL” position.

FRONT PANEL
@ POWER
Turns the power on and off.
When the power is turned on, the upper indi-
cator will flicker then light.
Power is alternated on and off everytime the
button is pressed.
Note:
« Back up circuit
Even if the power is turned off or there
is a power faiture, the back up circuit will
continue to operate and maintain the
button settings for about three days.
However, after this period has been ex-
ceeded the memory circuit will cancel
and the button settings will be fost. In
this situation press the buttons you want
once more.
@ Sampling frequency indicator
in response to a digital signal input a sampling
frequency will be displayed in this section.
© 0/A CONVERTER DIRECT
When this button is pressed the indicator will
light and a signa! from a CD player or some
other component connected to the [SEIS
terminal will input directly into the power am-
plifier. Very high quality HiFi sound reproduc-
tion with DIGITAL PURE A TYPE 1! is achieved.
@ MASTER LEVEL CONTROL
This knob is used to adjust the volume of the
speakers or headphones.
@ PHONES (headphone jack)
@ REMOTE SENSOR
This sensor receives the signal transmitted from
the remote control unit. When a signal is be-
ing received the indicator will light.
@ SPEAKERS
These are the on/off buttons for speakers 1 and
2
When this button is pressed to on, the indica-
tor above the button will light.
AW-2OW DGITAL REFERENCE ITEGRATED AMPURER S.eciONGRFITE Ke
@ Analog input sefector
Changes the analog system source connect-
ed to the CD, LINE 1-3, PHONO, and DAT
T/TAPE 2 terminais.
When each button is pressed, the indicator
above the button will light. When D/A CON-
VERTER DIRECT or @ DAT MONITOR is
operated, the indicator will be off and the
source will be changed to the digital system.
© TAPE 1/DAT 2 (TAPE 1 » DAT 1)
Turn ON when setting a tape deck connect-
ed to the TAPE t/DAT 2 terminal to
replay/record monitor, when using equipment
such as a SEA graphic equalizer, or when
copying (dubbing) from TAPE 1/DAT 2 to DAT
T/TAPE 2.
When it is turned ON, the MONITOR/COPY in-
dicator above the button will light. The power
is alternated ON/OFF everytime the button is
pressed. (Even if another source is selected,
it will not automatically be turned OFF.)
Since this button (source) has the highest pri-
ority of all sources, set it OFF except in the
above cases.
@ Digital input selector
This can be used to change the digital system
source connected to the DIGITAL 1 and DIG-
ITAL 2 terminals,
When each button is pressed, the indicator
above the button will light. When the analog
input selector is operated, the indicator will be
off and the source will be changed to the ana-
log system.
@ DAT MONITOR
Press this button to on when monitoring play-
back/recording of a DAT deck connected to
the DAT digital terminals. When this button is
pressed to on, the indicator above the button
will light. ON/OFF is alternated everytime the
button is pressed. (Selecting another digital
source does not turn it off automatically.)
@ BASS CONTROL
When music volume is turned down the hu-
man ear tends to become less aware of bass
sound. This can be compensated for by ad-
justing the bass control knob so that you can
enjoy powerful bass even at low sound level.
@ BALANCE
This knob adjusts the volume balance between
the leit and right speakers.
Normally it is set to the center. (When DiA
CONVERTER DIRECT is being used this knob
will not operate.)
AX-Z1010TN
(No. 20115) 1-7

AX-Z1010TN
1-8
HOW TO OPERATE
Turn the MASTER LEVEL CONTROL knob down
before turning on the power.
Connect the tuner and video components to LINE
1 - 3 respectively in accordance with the diagram
on page 5, 6 showing connections.
LS.
pieler, Tourne-disq
-- D/A CONVERTER DIRECT
Fig. 5
ANALOG INPUT SELECTOR — '~ DAT MONITOR
TAPE 1/DAT 2
Drehen Sie den MASTER LEVEL CONTROL-
Knopt herunter, bevor Sie den Netzstrom ein-
schaiten.
SchlieBen Sie den Tuner und die Video-
Komponenten an die Buchsen LINE 1 — 3 an.
wie im AnschiuBdiagramm auf Seite 5, 6 gezeigt.
ANALOG INPUT
SELECTOR
OUTPUT
OPTICAL DIGITAL
ANALOG
FM/AM Broadcast
FM/AM-Rundfunksendungen
Emmission en FM/AM
VIDEO (Hi-Fi VIDEO, etc.
OUTPUT
+——
COAXIAL DIGITAL DAT
ANALOG DAT 1/TAPE 2
DAT V/TAPE 2
TAPE 1 / DAT 2
(TAPE 1 ® DAT 1)
‘— DIGITAL INPUT SELECTOR
Abaisser le bouton de contréie de niveau princi
pal (MASTER LEVEL CONTROL) avant de four-
nir Valimentation.
Raccorder le syntoniseur et les.appareils video a
laligne 1 ~ 3 (LINE 1 — 3) respectivement sur
vant le diagramme de page 5, 6 indiquant les rac-
cordements.
DIGITAL INPUT
SELECTOR DAT MONITOR
DIGITAL 1
D/A CONVERTER DIRECT switch
When this switch is operated the digital input is
received directly by the power amplifier and the
balance circuit and source selector circuit are by-
passed. The D/A CONVERTER (Digital-Analog
Converter) output is input directly into MASTER
LEVEL CONTROL and very clear high fidelity per-
formance is achieved. Accordingly, when the D/A
CONVERTER DIRECT function is on. ANALOG
recording and the balance function will not
operate.
Notes:
* During the reception of television or FM
radio signals, depending on the broad-
casting station frequency, noise might ap-
pear from digital units such as CD players.
in this type of situation, cut off the power
to the digital unit.
(No, 20115)
ANALOG TAPE 1/DAT 2 -
D/A CONVERTER DIAECT-Schalter
Wenn Sie diesen Schalter betatigen, wird das Di-
gitaleingangssigna! direkt vom Endverstarker emp-
fangen. wobei Balance-Schaltkreis und
Signalquellenwahl-Schaltkreis umgangen werden.
Der D/A CONVERTER-Ausgang (Digital-Analog-
Umsetzer) liegt direkt am MASTER LEVEL CON-
TROL an, wodurch héchste Hifi-Klangqualitat
wanhrleistet ist. Wenn die D/A CONVERTER
DIRECT-Funktion eingeschaiter ist, sind ANALOG-
Aufnahmetunktion und Balancereglerfunktion al-
so nicht aktiv.
Hinweise:
* Wahrend des Empfangs von Fernseh- oder
UKW-Signalen kénnen — je nach der Fre-
quenz der Signalquelle — durch Digitalge-
rate wie CD-Spieler Geraéusche auftreten.
In diesem Faile die Stromversorgung zum
Digitatgerat abschalten.
Fig. 6
Commutateur direct de convertisseur
numérique-analogique
(D/A CONVERTER DIRECT)
Lorsque ce commutateur est manipulé, |'entrée
aumérique est directement regue par l'amplifica-
teur de puissance, et le circuit de balance et le
circuit de sélecteur de source sont ignorés. La sor-
ue de convertisseur numérique-analogique (D/A
CONVERTER) est directement entrée dans le con-
télé de niveau principal (MASTER LEVEL CON-
TROL), et ja reproduction sonore de trés haute
fidélité est ainsi réalisée. Par consequent. lorsque
ja touche de fonction directe de convertisseur
numérique-analogique (D/A CONVERTER
DIRECT) est sur la position marche, l'enregistre-
ment analogique (ANALOG) et la commande de
balance ne s'effectuent pas.
Remarques:
e Pendant !a réception des signaux de la
télévision ou de la radio FM, seton la fré-
quence de Ia station émettrice, le bruit
pourrait se produire des appareils numé-
riques tets que le lecteur de disques com-
pacts. Dans une ielle situation, couper
latimentation de l'appareil numérique.

* When pressing DIGITAL INPUT SELEC-
TOR, DAT MONITOR or D/A CONVERTER
DIRECT button,while analog system
source is selected, there is about
4-seconds blank before switching to digi-
tal system source.
Recording
1. Choose either an analog or a digital source that
can be heard through the speakers. In this sit-
uation a 3 head tape deck connected to the
REC terminal of either DAT 1/TAPE 2 or TAPE
1/DAT 2 can receive a recording signal and
recording is possible,
Recording level is adjusted from the tape deck,
not from the MASTER LEVEL CONTROL.
(Please refer to the table on page 17, 19 which
shows button settings for various source and
recording combinations.)
2, As this amplifier has both DIGITAL and ANA-
LOG type input output terminals for a tape
deck a variety of combinations are possible
Wenn Sie bei Betrieb eines Anatog-
systems auf DIGITAL INPUT SELECTOR,
DAT MONITOR oder D/A CONVERTER DI-
RECT umschalten, vergehen etwa 4 Se-
kunden, bevor das Gerat auf die digitale
Tonquelle umschattet.
Aufnahme
1
ANALOG INPUT
SELECTOR
Verwenden Sie eine Analog- oder Digital-
Signaiquelle, die Uber die Lautsprecher zu ha-
ren ist. Ein 3-Tonkopf-Kassettendeck, das an
die REC-AnschiuBbuchsen von entweder
DAT 1/TAPE 2 oder TAPE i/DAT 2 ange-
schiossen ist, kann ein Aufnahmesignal emp-
fangen und ermdglicht damit die Aufnahme.
Der Aussteuerungspegel wird vom Kassetten-
deck her kontrolliert und nicht von MASTER
LEVEL CONTROL.
(Bitte beziehen Sie sich auf die Tabelle von Sei-
te 17, 19, wo die verschiedenen Knopf- und
Tastenstellungen fir Signalquellen- und Auf-
nahmekombinationen aufgefUhrt sind.)
Da der vorliegende Verstarker flr das Kasset-
tendeck sowohl Uber DIGITAL: als auch
ANALOG -Ein/Ausgangsbuchsen verttigt, sind
vielerlei Zusammensteltungen méglich,
TAPE 1/DAT 2
(TAPE 1 ® DAT 1)
AX-Z1010TN
¢ Lorsque le sélecteur d’entrée numérique
(DIGITAL INPUT SELECTOR), ie bouton de
DAT MONITOR ou D/A CONVERTER
DIRECT est enfoncé, alors qu’une source
de systéme analogique est sélectionnée,
it y a une coupure d’environ 4 seconds
avant la commutation sur la source de
systéme numérique.
Enregistrement
1
Choisir une source analogique ou numérique
qui peut étre écoutée a travers les haut-
parleurs. Dans ce cas, une platine d'énregis-
trement a 3 tétes raccordée a la borne d’enre-
gistrement (REC) du magnétophone
audionumérique W/bande 2 (DAT 1/TAPE 2)
ou du bande 1/magnétophone audionumér-
que 2 (TAPE 1/DAT 2} peut recevoir un signal
d'enregistrement, permettant ainsi |'enregistre-
ment. Le niveau d'enregistrement est régié
depuis la platine d'enregistrement, et non pas
depuis la commande de niveau snonore prin-
cipal (MASTER LEVEL CONTROL).
(Se référer a la table de page 17, 19 indiquant
le réglage des touches pour diverses combi-
naisons de source et d’enregistrement.)
Cet amplificateur est’ muni des bornes
d'entrée/sortie numérique ef analogique pour
un lecteur de bandes, et diverses combinai-
sons sont done possibles.
DIGITAL INPUT
SELECTOR
DAT MONITOR
DIGITAL 1 (OPTICAL) DAT (COAXIAL)
Digital recording cannot be made from a CD or other media that has a copy prohibition code included
in the digital signal.
Oigital-Aufnahm von einer CD-Platte oder einer anderen Kiangquelle mit Kopierschutzcode in den
Digital-Signalen ist nicht mdglich.
Hl n'est pas possible de faire un enregistrement numérique & partir d'un CD ou par un autre moyen
comportant un code interdisant tout enregistrement, qui est intégré dans le signal numérique.
{Monitoring is possi-
Mi ioe wh lich
ithéren méglich,
DIGITAL 2 (COAXIAL) DAT (COAXIAL) _ _ DIGITAL 2 wenn eingeschattet,)
(Le contréle est pos-
sible lorsque systeéme
est allumé.)
OFF Select the source you
DAT 1/TAPE 2 want to record.
Die aufzunenmende
DIGITAL 1 (OPTICAL) =_ ~ Klangquelle anwah- OFF
(Monitoring is possible when ON.) len.
DIGITAL 2 (COAXIAL) TAPE 1/DAT 2 (Mithoren moglich, wenn eingeschaltet.) | Sélectionner la source
(Le contrdle est possibie lorsque le systéme} désirée.
est allumé.)
Recording is impossible.
AT H/TAPE 2 Aufnahme ist nicht méglich.
L'enregistrement n'est pas possible.
DAT (COAXIAL) —
(Monitoring is possible when ON.)
TAPE 1/DAT 2 > (Mithéren méglich, wenn eingeschaitet.) = ON
(Le contréie est possible lorsque le systeme
est allumé.)
2 —— ———SS—EE_ Ee eee |
Fig. 8
(No. 20115) 1-9

AX-Z101
OTN |
: ANALOG INPUT TAPE 1/DAT 2 DIGITAL INPUT
<} SELECTOR (TAPE t B DAT 1) SELECTOR DAT MONITOR
= pa “1 Select the source you OFF
DAT 1/TAPE 2 want to record.
cD Dia aufzunehmende
LINE 4 Klangquelle anwah- — _ _
LINE 2 len, (Monitoring is possible when ON.)
LINE 3 TAPE 1/DAT 2 Sélectionner fa source | (Mith6éren mdglich, wenn eingeschaltet.)
PHONO désirée. {Le contréle est possible lorsque le systéme
est aliumé.}
{Monitoring is possible when ON.)
DAT 1/TAPE 2 TAPE 1/DAT 2 DAT 1/TAPE 2 {Mithéren méglich, wenn wingeschaltet.)
(Le contrdle est possible lorsque le sysitéme
est allume.)
Select_other than = =
DAT 1/TAPE 2.
Eine andere als die
TAPE V/DAT 2 DAT 1/TAPE 2 Position DAT 1/TAPE ON
2 walen.
Sélectionner autre
que DAT 1/TAPE 2.
Fig.
Note: ig. 10
* This table shows the status when the D/A CONVERTER DIRECT
is off.
Hinweis:
* Diese Tabelle zeigt den Betriebszustand, wenn D/A CONVERT-
ER DIRECT ausgeschaltet ist.
Remarque:
© Ce tableau indique le statut torsque D/A CONVERTER DIRECT
est désactivé.
Notes: Hinweise: Remarques:
1-10
When recording to a tape deck of analog
system, set the D/A CONVERTER DIRECT
button to off.
DAT which is connected to the DIGITAL
terminal from the source of the analog
system cannot be recorded.
Regarding CD software and digital signals
which have a copy prohibit code in the
source, a digital recording cannot be
made.
When monitoring a recording to a 3 head
type deck should be connected to TAPE
1/DAT 2 terminals and the TAPE 1/DAT 2
button should be on,
During synchronized recording, the
source is locked to CD or PHONO position
to avoid accidental stops or changing to
another source.
(No. 20115)
Fur Aufnahmen auf das Kassettendeck ei-
ner Analoganlage schalten Sie die D/A
CONVERTER DIRECT Taste ausgeshaltet
ist.
Wenn der DIGITAL-Anschlu6 mit der Sig-
nalquelie eines Analog-Systems verbun-
den ist, kann kein DAT-Band aufge-
nommen werden.
Wenn CD-Software und digitale Signale
mit einer Kopiersperrcodierung verschen
sind, kann keine digitale Aufnahime durch-
gefiihrt werden.
Wenn die Aufnahme auf ein 3-Tonkopf-
kasettendeck mit der Monitor-Funktion
tiberwacht werden soll, soltte das Kasset-
tendeck an die TAPE 1/DAT 2-AnschluB-
buchsen angeschiossen werden und der
TAPE 1/DAT 2 Schalter eingeschaltet
sein.
Bei Synchro-Aufnahme wird die Signal-
quelieneinstellung fir CD oder PHONO
verriegelt, so daB unbeabsichtigte Unter-
brechungen oder Umschaitung auf ande-
re Signalquellen vermieden werden.
Lors d’un enregistrement vers un magné-
tocassette de systéme analogique, régler
la touche D/A CONVERTER DIRECT sur la
position désactivé.
il est impossible d’effectuer l’enregistre-
ment du magnétophone audionumérique
raccordé a la borne numérique (DIGITAL)
de la source du systéme analogique.
Pour les signaux des togiciels ou numéri-
ques du disque compact/disque compact
vidéo (CD) comportant un code a'interdic-
tion de copie dans fa source, il est impos-
sible d’effectuer l'enregistrement
numérique.
Lors du contréle d'un enregistrement pour
une platine d’enregistrement a 3 tétes (3
head tape deck), ta platine doit étre rac-
cordée aux bornes de band 1/magnéto-
phone audionumérique 2 (TAPE 1/DAT 2),
et le commutateur du moniteur de bande
1/magnétophone audionumérique . 2
(TAPE 1/DAT 2) doit étre mis sur la posi-
tion marche,
Pendant I'enregistrement synchronise, la
source est verrouillée a la position CD ou
PHONE pour éviter des arréts accidente-
les ou de changer de source.

Digital Pure A TYPE ft
If an amplifier is equipped with the built-in D/A con-
verter, ‘‘signal time base control” becomes easy
owing to the special characteristics of digital
signals.
Utilization of this special characteristics aliows an
amplifier to perform optimal A class operation.
Although the A class operation can be said to be
the ideal type for amplifiers, for an A class ampii-
fier with mass output, even at low level restart, a
mass current was always flowing to the power unit.
This caused a remarkable loss in ihe power unit
and generated unnecessary heat.
Digital Pure A Type 1! realizes the effective ideal
A class operation to curb unnecessary heat from
the low level to the high-level consisting of three
blocks by varying the operation current in the pow-
er unit to the optimum level for each signal.
Accordingly, a relaxing yet prowerful and silk-like
smooth sound quality can be enjoyed.
Time Base Processor by memory time shift
{circuit @ Ye nf ;
Arranged just before the D/A converter to slighily
shift the time axis of the input digital signal. _
[Prediction Signal Processor @
Creates a prediction signal from the input digital
signal based on the information obtained from the
input signal to the time base processor, and out-
Puts an operation point control signal grounded
on the created prediction signal.
[Programmable Bias Current Controller @
leceives the control signal in @ . alters the idling
current by the optical BIAS circuit and leads to the
Hi-Power Pure A class operation to curb unneces-
sary heat.
@ Input
@ Time base processor
© D/A converter
@ VOLUME
@® Power amplifier
© Output
@ Prediction signal processor
© Programmable bias current controller
COMPU LINK
REMOTE CONTROL
SYSTEM
The COMPU LINK REMOTE CONTROL SYSTEM
was deveioped by JVC. You can control each
COMPU LINK component from the remote con-
trol unit, and also perform the following advanced
operations with ease.
Automatic source selection
If the remote cable is used to connect this unit to
other JVC components with COMPU LINK-1/SYN-
CHRO terminals. By pressing the remote control
unit source selector button or the play button of
each connected equipment, the source change-
over and regenerated start can be performed au-
tomatically.
When switching from one component to another,
such as a cassette deck, turntable or CD player,
the previous component will stop playing after
about five seconds.
Synchronized recording
Synchronized recording refers to the process
whereby a cassette deck automatically com-
mences recording, in synchronization with the CD
player or turntable,
Set the cassette deck to the REC/PAUSE mode
according to the procedures in the instruction
manual.
When synchronously recording the CD player,
push the PLAY button on the CD piayer. The cas-
sette deck enters the record made the moment
the CD player starts and synchronized recording
commences.
Synchronized recording stops automatically when
the CD player stops playing.
To cancel synchronized recording, push the STOP
button of the CD player, turntable or cassette deck.
Note:
* When operating a CD player or a DAT
deck, select analog or digital system by
the COMPU LINK changeover switch of
this unit. If the switch is set to the wrong
position, desired operation cannot be per-
formed.
COMPU LINK
I//Remote /Ili
Control System
Fig. 12
AX-Z1010TN
(No. 20115)
1-11

AX-Z1010TN
REMOTE CONTROL
UNIT (RM-SA1010U)
Batteries
* How to install the batteries (Fig. 13)
1, Remove the battery cover by sliding the cover
of the battery case in the direction of the arrow.
2. Install the provided batteries (“‘AA”: UM-3, R6,
1.5 V), with their polarities properly placed.
Positive and negatives facing the correct
direction.
To operate the amplifier with the remote control
unit (RM-SA1010U) point it towards the “REMOTE
SENSOR” and press the buttons you want. The
remote contro} unit will activate the amplifier wi-
thin a range of about 7 meters (23 ft). If the remote
contro} unit is operated while being held at an ob-
lique angie the effective range will be reduced. Try
3. Re-Install the battery cover.
° Battery life
The batteries can be used for an average of 1 year.
° Battery replacement time
When the distance at which the remote contro! unit
functions begins to decrease, replace the batter-
ies (“AA": UM-3, R6, 1.5 V).
to point the unit directly towards the REMOTE
SENSOR of the amplifier
© Source Selector
‘Analog type
(Unit connected by COMPU LINK can be au-
tomatically operated using the remote control
unit)
CD: To play the CD player press the CD but-
ton on the remote control unit.
PHONO: To play the turntable press the
PHONO button on the remote control unit.
LINE 1; Press the LINE 1 button to play a
unit connected to the LINE 1 terminals on the
amplitier.
LINE 2: Press this button to play a unit con-
nected to the LINE 2 terminals on the amplifier
LINE 3: Press this button to play a unit con-
nected to the LINE 3 terminals on the amplifier.
DAT 1/TAPE 2: Press this button to play a
unit connected to the DAT 1/TAPE 2 terminals.
T 1/D 2 MON, T 1% D 1copy: Press this
button to on when monitoring playback/record-
‘ing of a tape deck connected to TAPE 4/DAT 2
terminals, or when using SEA graphic equaliz
er, or when copying (dubbing) from TAPE 1/
DAT 2 to: DAT 1/TAPE 2.
© SPEAKERS
These are the on/off buttons for speakers 1 and
| ped ‘onfimuee rea
et a |
T1702 May
Line TleBicoml|
DESCRIPTION AND FUNCTIONS
pas
@ D/A CON. DIRECT @ Source Selector @ MASTER LEVEL
When this button is pressed the indicator will Digital type -: As this button is being pressed the
light and with DIGITAL PURE A TYPE !laCD
player or some other cornponent connected
to the DIGITAL INPUT terminal will be heard
in very high grade HiFi sound.
1-12 (No. 20115)
(Unit connected by COMPU LINK can be au-
tomatically operated using the remote control
unit)
DIGITAL 1: Press this button to play a unit
connected to the DIGITAL 1 terminal.
DIGITAL 2: Press this button to play a unit
connected to the DIGITAL 2 terminal.
DAT MONITOR: Press this button to moni-
tor a recording or to play the DAT deck con-
nected to the DAT PciGiTAL | REC or PLAY
terminals on the amplifter. If pressed again the
function will stop.
MASTER LEVEL CONTROL knob will slowly
turn counterclockwise and the volume will be
reduced.
+: As this button is being pressed the
MASTER CONTROL LEVEL will slowly turn
clockwise and the volume will be increased.
© FADE MUTE
When this button is pressed the MASTER LEV-
EL CONTROL knob will turn down and the
sound will be softened.
(Each time the button is pressed the sound wilt
be further reduced.)

USING S.E.A.
GRAPHIC EQUALIZER/
PROCESSOR
To enjoy full SOUND FIELD contro! and TONE ad-
Justment you can connect a SEA graphic equalizer
or a DAP (Digital Acoustics Processor} to the TAPE
1/DAT 2 terminals of the amplifier
Note:
¢ When the D/A CONVERTER DIRECT func-
tion is on, the SEA graphic equalizer con-
nection will not operate.
1
tape L/oat2 Gea]
tig:
pur =
® Connecting to SEA (Fig. 15)
*® When operating SEA or playing back a deck
connected to SEA, turn on the TAPE 1/DAT
2 button and tun off the DIA CONVERTER
DIRECT bution of this unit.
SEA graphic equalizer
Graphischen SEA equalizer
Egatiseur graphique SEA
SEA grafische equalizer
Ecuatizador grafico SEA
SEA grafisk equalizer
AX-Z1010TN
Cassette deck
Kassettendeck
Platine a cassette
Cassettedeck
Magnetotono
Kassettdack
(No. 20115) 1-13

AX-Z1010TN
6x0
CARTRIDGE G8
bee
Oar 1/ TAPE
Levey
ree -———
tipevore GB)
betty «ad
UNE
man 4 DAP RAP
TUT Out
‘ ®
“
on
—B (irises
@ a
DAT deck
DA-Tonbandgerat
Enregistreur audionumérique
DAT digital deck
Magneidiono digital
Digitalkassettdack
wv
annie "wT
igtrat a
ante
0e0
—~ TAPE LUNE
par
tert FF
uA |
| =
Digital acoustics processor (DAP)
Digital-Akusikprozessor (DAP)
Processeur acoustique numeriqu (DAP)
Digitale akoestizk processor (DAP)
Procesador acustico digitat (DAP)
Digital akustisk processor (DAP)
Cassette deck
® Connecting to processors
(Fig. 16)
Connecting to a JVC's DAP
* When operating DAP or playing back a deck
connected to DAP, operate the button of this
unit as follows.
Digital connection
DAT MONITOR button - on
TAPE 1/DAT 2 button - off
Analog connection:
TAPE 1/DAT 2 button > on
D/A CONVERTER DIRECT button — off
* When connecting this unit to a JVC’s DAP, set
the OFFS DELAY parameter of the DAP as
follows.
Input source of this unit
Eingangssignal des Gerats
Source d’entrée de cet appareil
Kassetiendeck
Fig, 16
Platine & cassette
Cassettedeck
Magnetéfono
Kassettdack
OFFS DELAY setting value of DAP
OFFS DELAY Einstellwert des DAP
Valeur de réglage OFFS DELAY du DAP
DIGITAL
Ty
fs 48 kHz
106 ms 10 ms 10 ms
fs 44.1 kHz fs 32 kHz
ANALOG
Oms
1-14 (No. 20115)

I AX-Z1010TN
TROUBLESHOOTING
Check the following points before cailing for
repairs. ...
There is a difference between the sound lev-
el from the record player and the level from
another source.
The MM/MC type cartridge selector switch is not
set in the correct position.
-~ Set the selector switch on the back of the am-
plifier correctly.
No sound output
Erroneous cable connection
— Correct the connection
The input selector switch is not in the right position.
— Set switch in the current position.
The TAPE 1/DAT 2 switch is in the "on" Position.
— Press the TAPE 1/DAT 2 button so that the in-
dicator light goes off.
Speaker line are disconnected.
— Check connections between the back of the
amplifier and the speakers.
Sound is only coming from one speaker.
The lines going to a speaker are disconnected
~— Check connections between the speakers and
the back of the amplifier.
The BALANCE knob is turned completely to one
side.
— Return the BALANCE knob to the center.
When the volume is turned up while fisten-
ing to a record there is a booming sound.
The record player is picking up vibrations from the
speakers, (howling)
— Move the speakers well away from the record
player and place the record player on a firm
base:
(No. 20115) 1-15

AX-Z1010TN
Description of Technology
1. Digital Pure-A
The ‘’Digital Pure-A’’ is an operation system materialized based upon the new concept of “signal prediction’’. In
a conventional digital amplifier, the input digital signal is decoded by the built-in digital decoder and is applied to
the D/A converter as it is. In the ‘’Digital Pure-A’’, however, the input digital signal is once stored in a memory cir-
cuit and, after the large lapse of a certain period, is output to the D/A converter, in which way the signal is delayed
so that signal prediction is thus made possible by the preceding signal. In the AX-Z1010TN, the Digital Pure-A ope-
ration is performed by varying the bias current according to the level of the signal preciding 10 msec.
2. Prediction Signal Generation Circuit
(1) Preceding signal (H.O, DZ)
Of the serial data output from pin 17 of C106 (YM3623B), two bits of MSB and 2SB are latched by IC 261 in to
an EX-OR circuit, the output of which becomes ‘’H’’ when the playback signal level exceeds — 6 dB and is held
at C262 on the way for a certain time and is emitted from pin 1 of J403. (Half Over signal)
In addition, concurrently with this, the serial data is held at C269 for a certain time and is emitted from pin 3 of J403.
(Digital Zero signal)
OyT |
(Te
(12)BCO
(3)SYNC
(\4)VSSI
DIGRY DR 23}
Boot tae
Ls
Qi0!
ITCI44ES
ee Wes Poy | Gtr yea ee |!
- : lane Bg
1 D261
ZISS133
D262
ISSIZ3
Sse
st>—-
2 IC261, 1C262
fol TC74HC7T4AF TC74HC86P. A sf
Figure 1. Prediction Signat Generation Circuit
1-16 (No. 20115}

AX-Z1010TN
Then, by these two signals, judgement is made as to at which level the musical signal is.
(2) Delay signal (Vb)
The time base processor (!C 108) writes in a 16-Kbyte SRAM the serial data sent from the digital interface receiver
and at the same time reads the serial data which has been delayed 10 msec and outputs this delayed serial data
to the D/A converter. :
2SA954(0,2) 2SASE4A(RS) EQFOGOI-222T x Ic
tc26h «> & PERE 1 RT yet.
to @ {iczez re Wy 9
@ {em [39 GF Lt
IClO9 LCSSI7BSL~15
Lagoabbad
Figure 2. Delay Circuit
{No. 20115) 1-17

{3) Full-wave rectification outputs (VL, VR)
The delayed analog signal which is power amplified in the power amplification stage is subject to full-wave rectifi-
cation (1C701 and IC 702), the output of which is held at C703 for a certain time. This time constant is determined
by R719.
The L-ch and R-ch outputs of this full-wave rectification circuit are here assumed as VL and VR.
C7OKV2)
een
Figure 3. Full-wave Rectification Circuit
(4) Judgement circuit and bias current control
The outputs (from the emitters of Q707 and Q708) of the generated preceding signals (H.O, DZ) are subject to
comparison with the full-wave rectification outputs (VL, VR). The greater outputs enter to the bases of Q705 and
Q706 by way of 0703, thus the collector outputs drive the photocoupler (1C403, 1C404) to control the bias current.
1-18 (No. 20115)

[220F fiw) = escza10
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1
— aa J R56
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AX-Z1010TI
Ou/ SOV AWE)
(day a}
PSNB PSNB
ca23
lak 15k _[S6Psopv (Micad
R703 220K Dror RT 1a7K
ic7olKvey
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[ete
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Figure 4. Judgement Circuit and Bias Current Control
(No. 20115)
1-19

AX-Z1010TN
Removal Procedures
@ Removing the Top Cover
1. Remove the four screws from the top plate, then the
eight screws, each four from either side, and the three
screws from the rear side.
2. Lift up off the top cover gently by its rear section.
(Figure 1)
B Removing the Front Panel
1. Remove the top cover.
2. Detach the volume contro! knob.
3. Remove the two plastic rivets fixing the bracket of the
indicator board (ENE-051-4), then also the two plas-
tic rivets for ENE-015-5.
4, Remove the six screws fixing the front panel (three
from its upper side and the other three from its lower
side).
@ Removing the Front PC Board and the
Key input PC Board
. Remove the front panel.
. Disconnect the flat wires from connectors J905. J903
and J906 on the front PC board.
3. Remove the six plastic rivets fixing the front PC board
and the key input PC board.
Note: Before disconnecting the flat wires, be sure to un-
lock the connectors.
N=
M Disconnecting the Protector PC Board
1, Remove the five foot pieces from the bottom cover.
2. Remove the twenty five screws of the bottom cover,
then take out the bottom cover.
3. Disconnect all the flat wires from the connectors on
the protector PC board.
4. Remove the four screws fixing the protector PC board.
(Figure 2)
@ Disconnecting the Power Supply PC
Board and Removing the Sub Heat Sink
. Remove the top cover.
. Remove the protector PC board.
3. Disconnect the cables fastened round the soldering
face of the power supply PC board.
4, Remove the four screws fixing the power suppiy PC
board.
5. Unsolder the sub heat sink from the power supply PC
board. (Figure 3) :
b=
@ Removing the DAC PC Board
1. Remove the top cover.
2. Remove the bottom cover.
3. Remove the five screws, then release the cable from
the four wire bundle bands, and detach the shield
cover.
1-20 (No. 20115)
Figure 1.
Cable
Protect PC board | Power supply PC board
AP ee esely
Ee eo)
amok
Figure 2.
Sub heat sink
Figure 3.