Kenwood VR 257 Service Manual

Page 2

KRFRV5010(K)COVER(98.12.912122 y [ w 3

Contents
CONTENTS / ACCESSORIES . ADJUSTMENT
CONTROLS ........................... PC BOARD .....

DISASSEMBLY FOR REPAIR..
WIRING DIAGRAM ................
BLOCK DIAGRAM ...........
CIRCUIT DESCRIPTION.

Accessories

+
KRF-VSOION6010N7010/VR-205/206/207/255/257

CONTENTS / ACCESSORIES

oo'xioa'ui'coiv

SCHEMATIC DIAGRAM
EXPLODED VIEW ........
PARTS LIST ..........
SPECIFICATIONS

FM indoor antenna (1)
(T90-0836-05)

Remote control unit (1)
RC-R0307/R0407

Loop antenna stand (1)
(J19-3645-05)

Remote control unit (1)
RC-R0507/R0607

AC plug adaptor (t)
(E03-0115-05)

*Use to adapt the plug on the power
cord to the shape of the wall outlet.
(Accessory only for regions where use
is necessary.)

Batteries (ROS/AAA) (4)

Batteries (ROB/AA) (2)

K Model name vs remote controller
Remote controller . .
Parts number Model name Model name Destination Battery cover
VR»207 KP1
VR7257 K1P2
A7071194705 RC7R0607 VRv255 K1P2
KRF-V7010 Y1M1 1409-0366708
KRF7V701O X1E1T1
A70»1195»05 RCVR0507 KRFVV7O1OW Qt
KRF»V7010E E2
KRF-V6010 E
KRFVV601OW Qt
KRF7V6010E E1
A7071196-05 RCER0307 KRF7V501O E1T1
KRF7V5010W Q1 A0970396»08
KRF-V5010E E2
VR7206 K2P3
KRF-V6010 M1X1
A7071199705 RC7R0407 VR7205 KP1
KRF-V5010 Y1M1X1

Resetting the Microcomputer

II the microcomputer may malfunction (unit cannot be operated,
or shows an erroneous display) if the power cord is unplugged
while the power is ON, or due to some other external Iactor. lfthis
happens, execute the following procedure to reset the micro-
computer and return the unit to its normal operating condition.

For USA. and Canada

Unplug the power cord from the wall outlet, then plug it
back in while holding down the POWER key.

For other countries

With the power cord plugged in, turn the POWER key
OFF. Then, while holding down the ON/STANDBY key,
press POWER.

- Please note that resetting the microcomputer will clear the contents
oi the memory and returns the unit to the state it was in when it left the
Iactory.