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

6
KVT-50DVDRY/512/522DVD /522DVDY/532DVD/532DVDM
BLOCK DIAGRAM
J1
DC CN MOLEX 15A
CN351
AUDIO AV IN
DVS-8020V DVD MECHA
CN701
WH UBS
W801
TV-BOX (E,M,X)
CN351
SAT I/F
CN353
AV IN VIDEO
CN351
CN354
NAVI
IC701
(MAGNUM)
BE
FLASH ROM
IC702
CATION
i-Pod AUTHENTI-
IC851
J681
IC602
LPF
USB H/C
IC801
PROTECTION
OVER CURRENT
IC804
LPF
IC601
AUDIO
DAC
IC651
LPF
MUTE ISO-1
SEL
MUTE1 BUFF1
ISO-2 MUTE2 BUFF2
ISO-3 MUTE3 BUFF3
ISO-4
ISO-5
ISO-6
ISO-7 AUDIO BLOCK
IN-6
IN-5
VIDEO BLOCK
SEL
IN-4
IN-3
IN-2
IN-1
6dB
6dB
6dB
SW
SW
SW
IC358
iPod
CN352
F-ZB
SYNC-TIP
CLAMP
SYNC
RGB
SW
IC361
SDRAM 128MHz
IC703,704
D OUT
ISO
AMP
SEL
ISO
AMP
INPUT SEL &
VOL
OUT
MUTE
FM/AM
(S07 F/E)
A1
RDS
IC355
E2PROM
X86-403
IC351
PWIC
MUTE
ANT FM/AM
W351
CN351
MUTE
CN351
MUTE
AV OUT
u-COM
IC9
ILLUMI
VARIABLE
VMUTE
MOTOR
IC5
DRIVER
X35-496 to
CN3
MOTOR
DRIVER
IC6
X15-110 B/2 to
CN4
BU14V
BU5V
A8.5V SIR SW14V
BU3.3V
BE A5V T P+5VA5V
SW+14V
DCDC DCDC
SW5V D3.3V D5VV5VMECHA
D1.8V USB3.3VUSB1.8VTC3.3V
USB5V
SW3.3V V3.3V P5V
7.5V
X15-110 A/2 to
CN551
X15-110 to
CN101
REMO
IC551
11 LEDS
10 KEYS
PANEL MECHA to
CN104
IC304
AMP
MEMORY
IC302
SERIAL
X35-496 B/2
to CN302
to LCD PANEL
X35-496 A/2
to CN502
CN503
to TOUCH PANEL
CN501
V ILLUMI
FUNCTION
SCREEN
OPEN/CLOSE
IC1
INVERTER
SRC NAVI
KEY
(BACK LIGHT) to LCD
CN1
(SW5V)
P ON+5V SW+14V
TC3.3V MECHA3.3V
(SW3.3V)
T P+5V
DCDC
IC101
+12.5VD2.5V -12V
5V for IC1 D2.5V
-6V
IC357
DET
SLIDE
CHILT
CONTROL
DECODER
VIDEO
u-COM
USB5V
BU DET
ACC DET
REVERSE
PARKING
P CON
ANT CON
W REMO
ILLUMI
LINE MUTE
D3.3V
26
D+: USB3.3V
D-: USB1.8V
USB5V
BE A5V
V5V
AVSW SDA
AVSW SCL
AVSW PDN
u-COM
A5V V5V SW3.3V
BU14V
RST
SDATA
MREQ
JUDGE
SREQ
CLK
MDATA
u-COM
V5V
RX
TX u-COM
REMO
VIDEO DRIVERS
V5V
V5V
RGB SW1
TUNER
CD
MD
CDCH
AUX
MUXC VOL IN
MUXB AC IN 3
AC IN 1
AC IN 2
AC IN 0
PAOUT
LDOUT
AOUT MUTE
MUTEC
MUTE2
u-COM
EVOL SCL
MUTE0
MUTE1
EVOL SDA
DC DET
A8.35V
TUN IFC
AM+B
TUN SMET
TUN SDA
TUN SCL
R AFS H
R NOISE
u-COM
A8.35V SW5V
SW5V
u-COM
R CLK
R DATA
R QUAL
WININ u-COM
PW STBY
PW MUTE
BEEP
PRE FRRE
PRE
VOUT AV AV
AOUT
SW5V
3
21
NT PAL
COMPOSIT
SOG
NT PAL
VMUTE from u-COM
BE VMUTE from BE (MAGNUM)
MECHA7.5V
44
7RESET
LED R
EJECT
SW5V
SI
LED G
REMO
KEY2
GND
MAGNUM
SIGNAL
COMPOSIT
RGB
AUDIO
u-COMu-COM P ON SIR PON
u-COM
P ON
u-COM
P START
P GOOD
P PWM
MCNT
P ON
D5V
P5V
VOL-
AUTO
FM
REW
AM
VOL+
ATT
EJECT
RESET
FW
SW3.3V
SW3.3V
BU14V
10
TC WAIT
TC RST
TC SCL
TC SDA
NT PAL
SOG
COMPOSIT
VMUTE
HSY
VSY
TC3.3V
4
D2.5V
TC3.3V
P ON+5V
DEH
STHR
STHL
CKV
L/R
DEV
STVR
STVL
VCOM
CPH1
VCOMOUT
VCOMDC
-6V
TC3.3V
+18V
P ON+5V
YDATA
Y0
X0
X1
XDATA
T P+5V
LED G
LED B
LED R
KEY1
OPEN/CLOSE
INV PWM
INV SW
PWM
ENABLE
5V for IC1
SW14V
u-COM
DISC DET
D3.3VV3.3V D1.8V
TX
RX
CON
MAGNUM
RST
BU5V
BU3.3V
SW5V
MECHA3.3V
12
SIR SW14V
(X15-) (A/2)
(X35-) (B/2)
(X35-) (A/2)
(X15-) (B/2)

7
KVT-50DVDRY/512/522DVD
/522DVDY/532DVD/532DVDM
●VIDEO CONTROL UNIT (X15-110x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 3-terminal regulator 9V→5V regulator
IC2 3-terminal regulator For AUDIO8.5V
IC3 DC/DC converter IC MECHA7.5V/D5V control
IC4 DC/DC converter IC USB5V/D3.3V control
IC5 Motor driver Slide
IC6 Motor driver Tilt
IC7 3.3V regulator TC3.3V
IC8 Buffer for remote controller Remote controller signal waveform shaping
IC9 System μ-com IC System control
IC10 E2PROM For saving the settings
IC12 Voltage detector μ-com reset voltage (3.5V) monitoring
IC13 OR For VMUTE
IC351 POWER IC Power amplifier for speaker output
IC354 VIDEO ISO AMP IPod video signal
IC355 RDS decoder IC For RDS signal processing and demodulation
IC356 AND*4 KAB IF 3.3V→5V LEVEL SHIFT
IC357 Electronic volume IC AUDIO -VOL_CTL/SIG_SELECT
IC358 AV SWITCH 7-input/3-output AUDIO and 6-input/3-output VIDEO
IC361 VIDEO SELECTOR DVD_BE and NAVI_RGB SELECT
IC401,402 INVERTER TV_SDATA OUT BUFFER
IC551 IR remote controller photoreceptor Remote controller signal detection
IC601 VIDEO AMP DVD_BE COMPOSITE SIG LPF/BUFFER
IC602 VIDEO AMP DVD_BE RGB SIG LPF/BUFFER
IC651 AUDIO DAC DVD_BE AUDIO D/A CONVERTER
IC652 OP-AMP*2 DVD_BE AUDIO LPF
IC691 INVERTER SPDIF OUT BUFFER
IC692 AND For DVD_BE IC RESET_SIG
IC701 MPEG DECODER DVD/USB MPEG DECODER
IC702 64M FLASH FLASH MEMORY (MP 4Z4) for MPEG DECODER
IC703,704 128M SDRAM SDRAM for MPEG DECODER
IC705 Regulator 3.3V→1.8V regulator for MPEG DECODER
IC801 USB HOST CONTROLLER 2PORT (External/GARMIN navigation) USB HOST CONTROLLER
IC804 Fixed Current Limit
Power Distribution Switch Large current distribution switch for USB
IC805 Regulator 5V→3.3V regulator for USB
IC806 Regulator SW3.3V→1.8V regulator for USB
IC807 D-TYPE LATCH X 8 Address latch for USB H/C
IC851 COPROCESSOR IPOD AUTHENTICATION
Q1 SW REVERSE detection
Q2 SW PARKING detection
COMPONENTS DESCRIPTION

8
KVT-50DVDRY/512/522DVD
/522DVDY/532DVD/532DVDM
Ref. No. Application / Function Operation / Condition / Compatibility
Q3 SW ILLUMI detection
Q4-7 SW PCON output
Q8,9 SW ANT_CON output
Q11 SW ACC detection
Q12-20 SW Over voltage/Voltage reduction/BU_DET
Q21-25 SW BU5V circuit
Q26-28 SW BU3.3V circuit
Q29,30 SW T_P+5V circuit
Q35-37 SW P_ON SW+14V control
Q38 SW P_ON SW+14V ON/OFF
Q39 SW A8.5V circuit
Q40-42 SW A5V circuit
Q43,44 SW BE_A5V circuit
Q45 SW KAB SW+14V control
Q46 SW KAB SW+14V ON/OFF
Q51 SW DC/DC protection control
Q52 SW Z2-MECHA power supply voltage (7.5V/5V) switching
Q53 SW DC/DC protection control
Q54 SW DC/DC SW FET (MECHA7.5V)
Q55 SW DC/DC SW FET (D5V)
Q56,57 SW DC/DC protection control
Q58 SW DC/DC SW FET (USB5V)
Q59 SW DC/DC SW FET (D3.3V)
Q60,61 SW VILL_R power supply
Q62,63 SW VILL_G power supply
Q64,65 SW VILL_B power supply
Q66,67 SW LED_R power supply
Q68,69 SW LED_G power supply
Q71,72 SW A8.5V circuit
Q73 SW DETMUTE circuit (Trigger BU_DET), DETMUTE detection
Q74 SW DETMUTE circuit (Trigger RESET), DETMUTE detection
Q75 SW DETMUTE circuit (Trigger RESET), TV_RST detection
Q76 BUFFER HSY (3.3V→5V)
Q77 SW DC/DC PSTART
Q78 BUFFER AVSW_SDA (5V→3.3V)
Q79 BUFFER AVSW_SCL (5V→3.3V)
Q80 SW SI
Q82 SW KAB detection
Q350 SW KAB_RX error connection protection
Q351-353 SW Pre-Out_Mute circuit (FRONT)
Q354-356 SW Pre-Out_Mute circuit (REAR)
COMPONENTS DESCRIPTION

9
KVT-50DVDRY/512/522DVD
/522DVDY/532DVD/532DVDM
Ref. No. Application / Function Operation / Condition / Compatibility
Q357-360 SW Pre-Out_Mute circuit (AVOUT)
Q361,362 SW ON when AM (TUNNER8.5V)
Q370 SW KAB_RX error connection protection
Q371-373 SW Tuner_Mute circuit (during ejection)
Q451 BUFFER HD
Q452 SW NT_PAL
Q453 BUFFER DVD_V
Q454,455 SW For KAB_TX control
Q651 SW DVD AUDIO MUTE LCH
Q652 SW DVD AUDIO MUTE RCH
Q653 SW DVD AUDIO MUTE control
Q654,655 SW DVD AUDIO neutral point circuit
Q681 BUFFER SPDIF OUT BUFFER
Q683 SW DVD AUDIO MUTE control
●VIDEO UNIT (X35-4960-10)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 Inverter IC Power supply for CCFL
IC101 Power supply IC for LCD Support 3 output (18V/12.5V/-12V)
IC102 Multi-vibrator IC For LCD power supply rising timing adjustment
IC103 Logic IC For LCD power supply rising timing adjustment
IC200 Op amp IC Buffer for VCOM signal
IC300 Power supply IC 2.5V output
IC302 Serial flush F/W storage for video decoder IC
IC304 Video decoder IC For decoding video signal
Q1 For switching Bright PWM signal SW
Q2,3 Dual FET For DC/AC conversion
Q4 Register integrated transistor External synchronization: 121kHz/Free run: 56kHz→ON (On when it is 56kHz)
Q5 Power supply transistor For inverter IC power supply (5V)
Q101,102 Power supply transistor For generating -6V from -12V (-12V→-6V)
Q200,202 Buffer transistor For VCOM signal level conversion
Q203 Integrated transistor For VCOM signal level conversion
Q501 Register integrated transistor For touch panel XY coordinate import switching
Q502,503 Integrated Register integrated transistor For touch panel signal
●DVD UNIT (X37-1100-03)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 RF signal processing IC RF signal processing
IC3 FLASH ROM Maintain F/W for optical DISC control IC
COMPONENTS DESCRIPTION

10
KVT-50DVDRY/512/522DVD
/522DVDY/532DVD/532DVDM
Ref. No. Application / Function Operation / Condition / Compatibility
IC4 Optical disc control IC in μ-com Optical DISC general control / ATAPI interface
IC5 Voltage detection IC For system resetting of optical DISC control IC
IC7 3.3V power supply 5V→3.3V
IC8 Voltage detection IC For 1.5V power supply IC voltage monitor
IC9 1.5V power supply 5V→1.5V
IC10 Driver IC Focus coil, Tracking coil, Spindle motor, Sled motor and Lo/Ej motor drive
IC11 EEPROM Maintain data for optical DISC control IC
IC12 OP-AMP for Iop measurement For IOP measurement
Q1 Register integrated transistor SL. MUTE control
Q2 Register integrated transistor For FG signal
Q3 Register integrated transistor LO.MUTE control
Q4 Register integrated transistor DRMU control
Q5 MOS-FET Laser diode ON/OFF control for DVD
Q6 MOS-FET Laser diode ON/OFF control for CD
Q12 Transistor for APC Laser diode brightness control for CD
Q13 Transistor for APC Laser diode brightness control for DVD
Q14 MOS-FET For IOP measurement
Q15 Register integrated transistor HFM ON/OFF control
Q18,19 Register integrated transistor 3.3V power supply IC ON timing control
COMPONENTS DESCRIPTION