Jvc RX 7000 RBK Service Manual

Page 1

RX-7000RBK

SERVICE MANUAL

AUDIONIDEO CONTROL RECEIVER

RX-7000RBK

Area Suffix

-- Continental Europe
EN Northern Europe

g
§§§§ EIiEiTELAp
59ng m i... TEXT
= g, rnutm I luv
En-fi E] D bwnr U Luv
EEEl ° can == -©. scrapmmx
REE EDD We [ ~~~~~ l III/Remofe/III
V i\_/l i\_/l
30
3079/4on
M PE9,(' Multichannel
D I (n I T A l
DCI
D I G I T A L
@EIQlél
Contents
Safety precautions - 1-2 Adjustment method ........
Disassembly method ------------- 1-3 Description of major le - 1-1 0

This service manual is printed on 100% recycled paper. No 20846
COPYRIGHT (C) 2000 VICTOR COMPANY OF JAPAN, LTD. I
Jul. 2000

Page 2

http: //getMANUAL . com

RX-7000RBK

-Safety Precautions

1.This 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. Services should be performed 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 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 (fi) 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 re-assembling.

5. Leakage currnet check (Electrical 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.

0 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 areturn path to the chassis, to a known good earth ground. Any leakage
current must not exceed 0.5mA AC (r.m.s.)

0 Alternate check method
Plug 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 1,5009 10W resistor paralleled by
a 0.15uF AC-type capacitor between an exposed

AC VOLTMETER
metal part and a known good earth ground. E (Having 1000
Measure the AC voltage across the resistor with the ohms/volts,
AC voltmeter. or more sensitivity)
Move the resistor connection to eachexposed metal °
part, particularly any exposed metal part having a 015): ACTYPE
return path to the chassis, and meausre the AC ,
voltage across the resistor. Now, reverse the plug in -II- 33:21?
the AC outlet and repeat each measurement. voltage W) > each exposed
measured Any must not exceed 0.75 V AC (r.m.s.). 15009 10W metal part.

This corresponds to 0.5 mA AC (r.m.s.).
Good earth ground

-Warnlng
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.

A 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.

Page 14

RX-7000RBK

l LA1838(|C102): FM AM IF AMP&detector, FM MPX Decoder
1. Block Diagram

30

1

29

2

2. Pin Function

28

REG

27 26 25 24

AM

FM
MIX REAMP

SD
COMP

AM/FM
IFVBUFF
TUNING
DRIVE

STEREO
DRIVE

23

22 21

20

DECODEH
ANITVBIRDIE

VCO

384KH2

TEREO
5N

SW

FF
38k

FF

7r PILOT
19W?

FF
isms DET

PM P'
No. Symbol I/O Function NI; Symbol l/O Function
1 FM IN I This is an input terminal of FM IF 16 R OUT 0 Right channel signal output.
signal.
2 AM MIX 0 This is an out put terminal for AM 17 L OUT 0 Left channel signal output.
mixer.
3 FM IF I Bypass 01 FM lF 18 R IN I Input terminal of the Right channel post
AMP.
4 AM IF I Input of AM IF Signal. 19 |_ IN | Input terminal of the Left channel
post AMP.
5 GND - This is the device ground terminal. 20 R0 0 Mpx Right channel signal output.
6 TUNED 0 When the set is tunning,this terminal 21 L0 Mpx Left channel signal output.
becomes "L'.
7 STEREO 0 Stereo indicator output. Stereo "L", 22 IF IN | Mpx input terminal
Mono: "H"
8 VCC - This is the power supply terminal. 23 FM OUT 0 FM detection output.
9 FM DET - FM detect transformer. 24 AM DET 0 AM detection output.
10 AM SD - This is a terminal of AM ceramic filter. 25 AM AGC | This is an AGC voltage input terminal
for AM
11 FM VSM 0 Adjust FM SD sensitivity. 26 AFC - This is an output terminal ot voltage
for FM-AFC.
12 AM st 0 Adjust AM so sensitivity. 27 AM RF I AM RF Signal input»
13 MUTE l/O When the signal of IF REQ of |Ct21( 23 REG 0 Register value between pin 26 and pin28
LC72131) appear, the signal of FM/AM besides the frequency width of the
IF output. //Muting control input. input signal.
14 FM/AM I Change overthe FM/AM "1PUL 29 AM OSC - This is a terminal 01 AM Local
"H" :FM, "L" :AM oscillation circuit.
15 MONO/ST 0 Stereo : "H", Mono: "L" 30 080 BUFFER 0 AM Local oscillation Signal output.

Page 71

I Parts Identification

:2

Become familiar with the buttans and contra/5 0n the receiver befare use.
Refer to the pages in parentheses for details.

ammo: Mirna/VIDEO com-not

011

DD

C3D

Remote Control

«9;!- "0 E
m n. 2 E E
i Q t:_112 E
2 :5: <2 <22: 122 2
E 222 G) MG) .14 E
IE Q)
E 5.3:! 7.2:.
E
El E
E
,16
(17
5%: FE E
a \E/ E
l ,19 @
IE W E
@
[TIER @
is
JVDW E
V E
@
EN01709.RX27ODDR[E]/l 2

TV/CATV/DBS 0/ | button (47 249)
Source selecting buttons (10)
DVD, DVD MULTI, CD, TAPE/MD, TV/DBS,
PHONO, FM/AM, VCR
SURROUND ON/OFF button (29. 31)
SURROUND MODE button (28. 29)
CD-DISC button (46)
SOUND button (24, 28, 33)
On-screen operation buttons (34, 41)
MENU, SET. EXIT, A, V, <1, D
TV VOL +/2 buttons (47, 48)
- RDS operation buttons (21 2 23)

PTY SEARCH, PTY 2/+, DISPLAY MODE
- Operating buttons {or audio/video components

(45 2 49)
AUDIO buttons (10)

C) . |
VCR (D/I button (47. 49)
SLEEP button (18)
ANALOG/DIGITAL button (17)
- 10 keys for selecting preset channel (20)
- 10 keys for adjusting sound (24. 28 2 31, 33)
10 keys for operating audio/video components

(45 2 49)
Remote control mode selector (10, 45, 48)
TEXT DISPLAY button (41)
CHANNEL +/2 buttons (47 2 49)
VOLUME +/2 buttons (11)
MUTING button (12)

42

10

mm

Front Panel

13

HEEIEIEEEIEIEIHE

@EI

EEIEE

EEI

@IE

STANDBY/ON (DI | button and STANDBY
lamp (10)

Remote sensor (9)

SURROUND ON/OFF button and lamp (30, 31)
SEA MODE button (24)

INPUT ANALOG/DIGITAL button (16)
FM/AM TUNING button (19)*

FM MODE button (20)

Display (10)

Source lamps (10)

MASTER VOLUME control (I 1)

PHONES jack (12)

SPEAKERS 1/2 buttons and lamps (11)

RDS operation buttons (21 2 23)

EON. TA/NEWS/INFO. PTY SEARCH,
DISPLAY MODE

DSP MODE button (28)
BALANCE/SURROUND ADJUST button
(12, 13, 28)*

SEA ADJUST button (24)*

SETTING button (13 2 l7)*

TUNER/SEA MEMORY button (19, 20, 24)
SOUND SELECT/INPUT ATT. button

(11, 12)

BASS BOOST/SOURCE NAME button

(12, 13)

ONE TOUCH OPERATION button and lamp
(18)

TUNER PRESET button (20)*

MULTI JOG control

What this control actually does depends on
which function you are trying to adjust. Before
using this control, select the function by pressing
one of the buttons marked with *.

SOURCE SELECTOR control (10)

00.4.24. 2:59 PM