Kenwood KVT-512DVD User manual

This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.
© 2008-3 PRINTED IN JAPAN
B53-0621-00 (N)519
SERVICE MANUAL
KVT-50DVDRY/512/522DVD
MONITOR WITH DVD RECEIVER
/522DVDY/532DVD/532DVDM
OFF
OPEN
/CLOSE
TEL
SCAN
MONITOR WITH DVD RECEIVER
V.OFF
SRC NAV
SF
KVT-522DVD
ATT
AUTO +FM
VOLUME
EJECT
TI
Illustrations is KVT-522DVD
Remote controller *
(A70-2083-15)
RC-DV340
Escutcheon
(B07-3159-02)
Mounting hardware assy
(J21-9716-03) Lever
(D10-4589-04) x2
Screw set *
(N99-1758-15)
SIZE AAA BATTERY *
(NOT SUPPLIED)
DC cord *
(E30-6815-05)
DC cord *
(E30-6816-05)
Cord with plug
(E30-6813-05)
*Depends on the models. Refer to the parts list.
REV: 5m
PRK: 2m
BU,GND: 1m
The IC3, and IC11 in the DVD unit (X37-1100-03) are not replaceable components.
When these ICs are defective, replace the whole DVD mechanism assembly (X92-6160-00).
You cannot replace only the board.
TEST MODE is the same as DDX512.
Please refer to the service manual (DDX512: B53-0620-00).

2
KVT-50DVDRY/512/522DVD
/522DVDY/532DVD/532DVDM
CAUTIONS IN ASSEMBLING PANEL DRIVE MECHANISM (A10-5171)
Observe the instructions described in this document when
you are going to replace the parts or components that are
shown in this document.
1. Replacement of motor flat spring
• When mounting the flat spring that shall be in contact
with the worm gear, press the spring toward the direction
shown with an arrow so that there will be no gap be-
tween the tip of the gear and the spring and then mount
the spring. The gear shall be pressure-inserted into the
motor.
• Note that there are two motors. Above operation of
mounting the flat spring is required on both of them.
Tilt drive gear train Slide drive gear train
Mount the flat spring
while pressing it
towards the direction
shown with an arrow
so that there will be no
clearance.
Mount the flat spring
while pressing it
towards the direction
shown with an arrow
so that there will be no
clearance.
DC Motor
Worm
Flat Spring
DC Motor
Worm
Flat Spring

3
KVT-50DVDRY/512/522DVD
/522DVDY/532DVD/532DVDM
CAUTIONS IN ASSEMBLING PANEL DRIVE MECHANISM (A10-5171)
2. Phase matching among gears
• Monitor tilt is driven under the control of the
rotary sensor and the phase matching among
gears and sensor is required.
The procedure for the phase matching is de-
scribed in the rest of this subsection.
1) Align the mark on the rack with the pin. (When
the monitor is folded down at 0 degree, the
rack is located at the position where the mark
and pin are aligned.
2) Insert the gear while keeping aligning the rack
pin with the notched section on the tilt gear 7.
3) Pre-assemble the tilt motor bracket assembly
(BKT Assy).
4) Align the notch on the sensor BKT with the
concave section of the sensor in the Assy.
5) While keeping the conditions stated in 3) and
4), insert the tilt motor BKT Assy transversally,
and fix the motor.
Tilt drive gear train
Location of mark
on the Rack
T-Rack-A Pin
Location of
notched section
Tilt Gear 7
Location of
notched section
Sensor Tilt Sensor Bkt

4
KVT-50DVDRY/512/522DVD
/522DVDY/532DVD/532DVDM
3. Insertion of slider
• This subsection describes cautions for inserting the
slider (slide section inside of the unit) into the outer
chassis.
1) On the rail at the left side of the slider, there is a part
called a stabilizer that is used to minimize play in
right and left sides.
The slide is made of resin. (Note that the rail is
shown at the right side of the slider in the picture.)
When inserting the slider, press the stabilizer towards
the direction shown with a blue arrow and insert it
into the groove on the rail.
2) PCB holder is pushed out towards the downside of
the picture due to the spring force and thus the chas-
sis and photo reflection sheet may be get caught by
the holder during the assembly.
Insert the slider while slightly lifting up the holder with
a pair of tweezers or any other similar device.
3) Insert the gear after confirming that the both of D
shaft gears at the right and left sides of the slider are
aliened with the tip of the right and left racks on the
chassis.
(Otherwise the slider will be inserted sidelong.
CAUTIONS IN ASSEMBLING PANEL DRIVE MECHANISM (A10-5171)
(Slider -Slide section inside of the unit)
Stabilizer
PCB Holder
These portions
tend to be get
caught.
Hold and lift up the holder
with a pair of tweezers.
Push the opposite side of
the PCB holder towards
the downside of the picture
and lift up the portions
that may get caught.
D shaft gear
D shaft gear
Rack gear
Rack gear

5
KVT-50DVDRY/512/522DVD
/522DVDY/532DVD/532DVDM
In assembling the Traverse UD arm, Drive cam assembly,
Drive gear 5 and Drive gear 4C, align register marks on
these components.
GEAR POSITION IN A DVD MECHANISM
BLOCK DIAGRAM
Drive gear 5
Drive cam assembly
Do not forcibly press gears to engage their teeth
but freely let the gears fall under their own weight
and engage their teeth.
Traverse UD arm
Drive gear 4C
Inscriptions
(register marks)
on gears
Align 6 marks as
shown in the
figure
DVS-8000V BLOCK DIAGRAM (X37-1100)
SPINDLE
MOTOR
DISC
OPTICAL PICKUP
STEPPING
2 PHASE
CN1
30PIN
28PIN
CN3
MOTOR &
DRIVER
ACTUATOR
M
DC MOTOR
LO/EJ
PROCESSOR
FRONT-END
IC1
IC12
IOP
DET
Q7,8
OPTICAL DISC
CONTROLLER
RESET IC CN2
50PIN
3.3V REG
IC7
D3.3V
A3.3V
A5V
D5V
1.5V REG
IC9
1.5V VOLTAGE DET
IC8
to
MAIN
Tr
APC
IC10
Q1,2
IC4
IC3
FLASH ROMEEPROM
IC11
HALL
IC
HFM3.3V
D7
SW LOEND
SW LOST
UNIT
U,V,W COIL
HALL BIAS
HALL SENSOR
DVD LD/CD LD
VREFH
IMON/VR DVD/VR CD
PDIC I/V OUT
FO+/-,TR+/-
THERMISTER
FO5,RO5
P5V
FO2,RO2
3
3
H1H,H1L,HB
A1,A2,A3
P5V
VHALF
FG
A5V
D5V
A3.3V
7
3
VHALF
IOP(AD)
VHALF(1.65V)
TRCRS
TE
SEN,SCK,STDI
FBAL,JLINE,
ARF,NARF
TSTSG
FG,EXCNT1 SDA,SCL DRV.MUTE,LO.MTE, FADR0-17, TRDRV,PWM8, BMS,STEP A,STEP B NCE,NWE,NOE FTD0-7
28
D5V A3.3V 1.5VD3.3V
16.897849MHz
NRST
D3.3V
ATAPI IF
D5V
P5V
DISC DET
ON/OFF
A5V
LIM-SW
4
SEN,SCK,STDI
VREF,EC
RF,FE1,FE2
A,B,C,D,E,F,
9
3
FE,AS,RFENV,RFDIFO
OFTR,BDO,VREF2
21
D3.3VD3.3V
9
DVDON/
CDON
TEMP
DET(AD)
2
D3.3V
HFM
A3.3V
2
VR
SPDRV,FODRV,
LPC1,2
VREFH
4
FO3,RO3
FO4,RO4
FO6,RO6
BMS,MUTE
HFM3.3V
PDIC VCC
HFM
SW EJEND
STBY,SPIN,IN2-6
A5V
SW
4