Kenwood RXDV 828 Service Manual

Page 1

RXD7525(K) COVER1,1P( 99.11.15:35PM \°~/1 /\

MINI HiFi COMPONENT SYSTEM

RXD-V525/V626/V727/V828

SERVICE MANUAL
(XD-V525~V828) **

KENWOOD

© 1999-8/B51-5567-00 (K/K) 406

Knob From glass
(K29-7470-14) (810-)

m». ma :mrmzm 5mm

osnnunv 3A,,
mm.
mums MODE

l/(b

Knob
(K29-7471-14)

Knob
(K29-7547-04)

1:112:1 Knob

(K29-7466-04)

Phone lack
(E11-0219-05)

SELECT o O

ENTER up

Phone (aok
(E11-0280-05)

r\
\/

Aum REVERSE

Cassette lid assy(L) -

(A53-)

"on NO

KENWOOD

Panel assy 7H
(A60-)

D/[ll]

"Refer to page 2 if you want to know system configuration.

Cassette lid assy(R)

(A53 )

_Panel assy(CD)
(A29-1067-03)

* Refer to parts list on page 55.

in compliance with Federal Regulations, following are repro-
ductions of labels on, or inside the product relating to laser
product safety.

Refer to the RXD-652 service manual (851651700) for
DISASSEMBLY FOR REPAIR.

defeated.

KENWOOD-Crop. certifies this equipment conforms to DHHS
Regulations No.21 DFR 1040. 10, Chapter 1, Subchapter J. .

DANGER : Laser radiation when open and interlock

AVOID DIRECT EXPOSURE TO BEAM

fii

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RXD7525(K) COVER1,1P( 99.11.15:35PM \°~:/°2 /\

RXD-V525/V626/V727/V828

CONTENTS / ACCESSORIES / CAUTIONS

Contents

CONTENTS / ACCESSORIES /CAUT|ONS .............. 2 PC BOARD .............................................................. 13
EXTERNAL VIEW ............ ...3 SCHEMATIC DIAGRAM ..
CIRCUIT DESCRIPTION. 4 EXPLODED VIEW

ADJUSTMENT ...................... 1 O PARTS LIST ..............
WIRING DIAGRAM ................................................... 12 SPECIFICATIONS .................................................... 67
Accessories
r 1
FM indoor antenna (1) AM loop antenna (1)
(Too-oaae-os) (T90-0837-05) Ac plug adaptor (1)

(EO3-O115-05) Use to adapt the plug on the power cord to

the shape of the wall outlet.
(Accessory only for regions where use is
necesary.)

Batteries (RS/AA) (2) Video cord(1)

(E30-1427-05)
° / Provided in the speaker package
Remote control unit (1)
(A70-1302-05): RC-V828...RXD-V828
(A70-1303-05): RC-V727...RXD-V727
(A70-1304-05): RC-V626...RXD-V525/V626 Battery cover (A09-0399-08)

K§\ IN PUT

KEV F

W\\
\/
.. 033$;
[3 (3 [DB

REM or: confirm uu rr
nc-vaza

KENWOOD

DIGESY mm assume mssum

:cno

System configuration

SYSTEM MAIN UNIT DESTINATION SPEAKER SP CORD PARTS NO.
XD-V525 RXD-v525 MI LS-N452 E30-5535-05
XD-V525 RXD-V525 V LS-N552 E30-5535-05
XD-V626 RXD-V626 MI LS-N552 E30-5535-05
E30-5535-05
XD-V727 RXD-V727 MIV LS-N752 E30_5559_05
LS-N552 E30-5535-05
XD-V828 RXD-V828 MIV CPS-N552 E30_5542_05
Cautions
Operation to reset Unplug the power cord from the power outlet

The microcomputer may fall into malfunction (impos- the"! while holding the ENTER key depressed,
. . . _ plug the power cord again.
SIbIIIty to operate, erroneous display, etc.) when the

power cord is unplugged while power is ON or due to /
an external factor. In this case, execute the following 4 Imam

procedure to reset the microcomputer and return it to

normal condition. 0 Please note that resetting the microcomputer clears the
contents stored in memory and returns it to the condition
2 when it left the factory.

I I 4%?

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RXDSZKQ COVER1,1P( 99.11.15:35PM \°-/ 10 /\

RXD-V525/V626/V727/V828

ADJUSTMENT

CD player adjustment
INPUT OUTPUT CD PLAYER
NO. ITEM SETTINGS SETTINGS SETTINGS ALIGNMENT ALIGN FOR FIG.
NO. [1] :Choose either LASER POWER or LASER CURRENT CHECK. ( Conlirm to be satisfied either LASER POWER or LASER
CURRENT CHECK.)

TEST MODE : While pressing the PLAY/PAUSE key ,plug the power code into the AC power wall output.
Insert TEST DISC.

On the power from 0.05

Set the sensor Press the to 0.15mW.When the
[1] LASER , section of the PLAY/PAUSE key to , diffraction grating is (a)
POWER optical power meter check that the display correctly aligned with
on the pickup lens. is "03". the RF level of 0.8Vprp
or more.

Set the tester

between both the Press the

[1] LASESHIEUCZRENT @3115" check land of R8 (10 :flt/EQlfiffdfiey 1° . somzoomv
7..) on the PCB(X32) 6. Sp ay
Is "03" or "05".

oi the set upper.

(Caution) Connect and remove to the tester for the laser current check at POWER OFF condition.

Connect an
. oscilloscope as PreSS the
[2] FOCUS ERROR Test dISC follows. PLAYIPAUSE key . FE BIAS Opfimum eye panem (b) (d)
BIAS We CH1 :RF(CN1 :1 pin) Conilrm that me Vm

GND:VC(CN1:4pin) dismay i5 "05"-
(Note) Type 4 disc: SONY YEDSV18 test disc or equivalent. (KTD702)

/\ (a) Laser Power (b) Test point
K /
0.05~0.15 mW
o1
CN2 Q
. é m X 32
Pickup _ .
Optical power meter (Component Side)

NL
(d) RF signal: AC coupled 12?
VC CN1
m
m J
NF

B

FRONT

' RF signal in test mode (PLAY).

- Perform the tangential and focusing offset are
focused into one point on the display. The crossing
points above and below the center shall also be
looked clearly.

10