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Extracted text from Kenwood X 92 4470 00 Service Manual (Ocr-read)
Page 1
X92-4470-0x
2
BLOCK DIAGRAM
Mother Board
IC10IC12
Pick-UpR-ch
L-ch
7IC6
A.GND
A
Q2
CIC11
Q4
9Q5D.GND
Vref
D.GND
IC5 Q1 D.GND
D.GNDSW5V
/PON
Bu.+5V
Q3 IC2 X2X3
D.GND
916
IC3
IC416.93MHz
S3
Loe/Lim SW
IC8
S4
8Eje SW
S2
12Eje SW
S.GND
D.GND
S1
D.GND Los SW
S.GND D4.7V D3.3VReg Fo CoilTr CoilA.+8V
Loading & Sled
Motor Spindle MotorSW PON
2.5V Reg
Motor DriverSW
SW
Motor S7.5V
Lo/Ej 0-01 Only A.GND
A.GND A3.3 Reg
E
APC
µ-Com DRAM8V SW 1Chip IC
Servo Processor
+
RF Amp
+
MP3 Decorder
WMA Decorder
LPF
Clock
16.93MHz Clock
24.57MHz
F
30 B
D
CD PLAYER UNIT (X32-5220-0x)
Ref.No. Application/Function Operation/Condition/Compatibility
IC2 D3.3V AVR Power supply for the pickup, IC5, IC8-10 and IC11
IC3 D2.5V AVR Power supply for IC8
IC4 4CH BTL dr iverFocusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
IC5 Mecha. control MI-COM.
IC6 A3.3V AVR Power supply for DAC, LPF operational reference voltage
IC7 Level shifting (3.3V-†’5V) Buffer and logic level conversion from IC10 to IC5
IC8 WMA decoder
IC9 Clock buffer for WMA
IC10 RF amplifier+CD DSP+MP3 decoder
IC11 4M bit DRAM For data buffer
IC12 Low pass filter 2nd low pass filter for audio signals
IC13 Schmitt tr igger for WMA
Q1 SW5V SWWhen PON (11pin) goes Lo, Q1 is turned on, and SW5V is supplied to IC7 and
AVREF (73PIN).
Q2 APC LD power control
Q3 D3.3V SW When PON (10pin) goes Hi, Q3 is turned on, and IC2 is working.
Q4
A.8V SWWhen PON (10pin) goes Hi, Q4 and Q5 are turned on, and A.8V is supplied to IC6
Q5 and IC12.
COMPONENTS DESCRIPTION
Page 2
X92-4470-0x
3
MICROCOMPUTERS TERMINAL DESCRIPTION
processing
Pin Name I/O Purpose Processing operation description description in
STBY
1~5 NC O Not use Low fixation Low
6 VDD - 5V potential
7 GND - GND potential
8,9 NC O Not use Low fixation Low
10 PON O Power ON/OFF control H : ON L : OFF Low
11 /PON O Power ON/OFF control H : OFF L : ON High
12 LOE/LIM_SW I Down limit SW detection L : inside circumference detection Hi-Z
13 8EjE_SW I Not use Low fixation Hi-Z
14 LOS_SW I Not use Low fixation Hi-Z
15 12EjE_SW I Not use Low fixation Hi-Z
16,17 NC O Not use Low fixation Low
18 IC/Vpp - Writing voltage (FLUSH) -
19 MUTE_L O Lch audio mute control L : mute ON H : mute OFF Low
20 MUTE_R O Rch audio mute control L : mute ON H : mute OFF Low
21~25 NC O Not use Low fixation Low
26 EFLG I WMA error detection H : error L : not error Out-Low
27 WAIT I Weight control signal detection Out-Low
28 FOK I Focus condition detection H : Focus OK L : Focus NG Out-Low
29,30 NC O Not use Low fixation Low
31 RESET I Reset detection H : normal L : reset Hi-Z
32 XT1 I Not useHi-Z
33 XT2 - Not use-
34 REGC -
35 X2 -
36 X1 IHi-Z
37 Vss - GND potential
38 VDD - 5V potential
39 NC O NC Output stop Low
40 WRL O Multiplexer WRITE signal _LBEN : 61002 (not use) _WRL : 63760 Out-Low
41 NC O Not use Low fixation Low
42 R/W O Multiplexer _R/W signal _R/W : 61002 _WRH : 63760 (not use) Out-Low
43 DSTB,RD O Multiplexer DSTB or RD signal _DSTB : 61002 _RD : 63760 Out-Low
44 ASTB O Multiplexer ASTB signal Out-Low
45,46 NC O Not use Low fixation Low
47~54 AD0~7 I/O Multiplexer address/data Out-Low
55 BVdd - Power supply for bus inter face
56 BVss - GND for bus inter face
57~64 AD8~15 I/O Multiplexer data/address Out-Low
MECHANISM MICROCOMPUTER (IC5 : X32)
Page 9
X92-4470-0x
10
OPERATION DESCRIPTION
(5) Floating position and lock position of the mechanism
The disc is loaded and ejected by rotation of the rollers that
come in close contact with the disc.
After the disc has been pulled in by the rollers, its position should
be adjusted so that it can be placed precisely on the turntable of
the traverse chassis. To make this possible, the traverse chassis
and outer chassis should be in the locked condition.
Since the outer chassis is originally locked on the main unit, if
the traverse chassis is also locked during playback, the disc
would be subjected directly to vibrations of vehicle during driv-
ing and the disc signal would be hindered, making the audio
intermittent or impossible to be played.
To prevent such a problem, the traverse chassis is suspended
from the outer case using springs or rubber dampers during
driving. This positioning protects the disc playback operations
and is referred to as the floating position.
(6) Function of slider (L)
Slider (L) ensures the mechanism lock position because
the shafts of the outer chassis are inserted into its
grooves in the same way as they are inserted into the
grooves on slider (R).
As slider (R) moves, the force moving the roller lever is
transmitted to slider (L), which also star ts the sliding
movement.
When the spring is compressed gradually to a cer tain
point, the force changes to a reverse force, which sup-
ports the jump-up operation of the roller lever.
Shafts for locking the traverse chassis (Outer case-integrated design) (4 shafts)
Outer-chassisThe shafts of the outer chassis are inserted into the grooves on the
sliders.
Outer-chassis
Traverse chassisSlider
Outer-chassis
The shafts of the outer chassis are inserted into the grooves on the
sliders.
Spring
Roller lever
Reverse
force
The shafts on the outer chassis are disengaged from the grooves on
the slider.Mechanism floating position
Mechanism lock position
Mechanism lock position
Mechanism floating position