Kenwood DDX 8019 Service Manual

Page 2

DDX8019/8029/8029Y/8039

O The ICtoG in the DIGITAL [/0 UNIT (X88-2020-15) is not a replaceable component.
In case of defective of this IC, replace the entire unit (X88-2020-15).

O The I05, I021, and I060 in the DVD unit (X37-1120-03) are not replaceable components.
In case of defective of any of these le, replace the DVD mechanism assembly. (The ICS has a device key, which shall be
made consistent with the S/No. of the mechanism assembly after replacement. Thus you cannot replace only the board.)

0 MICROCOMPUTERS TERMINAL DESCRIPTION, TEST MODE, ADJUSTMENT are the same as KVT-719DVD.
Please refer to the service manual (KVT-719DVD: 353-0507-00).

GEAR POSITION IN A DVD MECHANISM

In assembling the Traverse UD arm, Drive cam assembly, Traver/se UD arm
Drive gear 5 and Drive gear 40, align register marks on 7
these components.

Inscriptions
(register marks)
on gears

Align 6 marks
as shown in the
figure

I
Drive gear 5 Drive gear 40
Do not lorcibly press gears to engage their teeth

but freely let the gears fall under their own weight
and engage their teeth.

Page 9

DDX8019/8029/8029Y/8039

COMPONENTS DESCRIPTION

Ref. No. Application I Function Operation I Condition I Compatibility
IC309 On-Screen Display Controller On-Screen Display analog signal output
IC316 Triple Inverter Dot Clock (14.4MHZ) Buffer
IC322 CPLD 2/3 frequency dividing and PAL thinning control (compression processing circuit)
IC332 Low Dropout Voltage Regulator A8V 4) A5V (for Stereo DAC and LPF)
IC336 Triple Schmitt Inverter VSY, HSY Buffer
I0337 Triple Schmitt Inverter CPV, STH Buffer
0302 General Purpose Transistor OSD ROUT Current Amplifier
0303 General Purpose Transistor OSD GOUT Current Amplilier
0304 General Purpose Transistor OSD BOUT Current Amplifier
0 DVD UNIT (X37-1120-03)
Ref. No. Application I Function Operation I Condition I Compatibility
IC1 One chip LSI for DVD player RF signal processing / Servo processing / Decoding processing / AV decoding processing
IC5 FLASH ROM To retain F/W for one chip LSI (Nonvolatile memory)
ICQ EEP ROM To retain data for one chip LSI (Nonvolatile memory)
IC10 Driver IC Fo coil /Tr coil / SP motor / SLD motor/ LOAEJ motor drive
|C12 1ch video AMP +6dB amplifier with internal composite video output filter
IC15 Audio DAC DA converter for 2ch analogue audio output
IC21 2»output switching REG 5V 4) 3.3V/1.2V
|C39 OPAAMP for lop measurement For lop measurement
|C42 Logic IC for port extension For port extension
|C49 Low voltage logic For S/PDIF signal amplitude conversion (3.3V ~> 1.2V)
IC50 OP»AMP for audio LPF LPF for 2ch analogue audio output (Rch)
IC51 OPAAMP for audio LPF LPF for Sch analogue audio output (Lch)
IC54 SDRAM To retain data for one chip LSI (Nonvolatile memory)
IC55,56 Logic IC for port extension For port extension
IC57 Sch video amplifier With builtein filter +6dB amplifier for component/RGB video output
ICGO Power supply for 5.0V 8V a 5V (Exclusively for audio DAC)
01 Transistor with internal resistor L07MUTE control
02 Transistor with internal resistor For FG signal
03 Transistor with internal resistor For BMS
Q4 Transistor with internal resistor DRMUTE control
010 Front end transistor for APC Control of CD laser diode emission
011 Front end transistor for APC Control of DVD laser diode emission
012 Rear end transistor for APC Control of CD laser diode emission
013 Rear end transistor for APC Control of DVD laser diode emission
014 MOSAFET ON/OFF control of CD laser diode
015 MOS-FET ON/OFF control of DVD laser diode
020 MOS-FET for level shifter Level shilter for I2C clock
021 MOS-FET for level shifter Level shifter for I2C data
024 MOS-FET For lop measurement
025 Transistor with internal resistor IFSEL control
027 Transistor with internal resistor HFM ON/OFF control
028 Transistor for APC For CD laser diode protection (Current limiter)
Q29 Transistor for APC For DVD laser diode protection (Current limiter)

Page 23

PC BOARD (FOIL SIDE VIEW)

VIDEO UNIT X35-4730-10 (J75-0384-22)

Refer 10 the schematic dia-
gram for the values of resis-
tors and capacitors.

DDX8019/8029/8029Y/8039

23