Sony MCE-K550 User manual

MCE-K550/K750
E Model
Chinese Model
SERVICE MANUAL
VIDEO CD PLAYER
MICROFILM
Model Name Using Similar Mechanism MCE-S70
CD Mechanism Type CDM14-5BD24
Base Unit Type BU-5BD24
Optical Pick-up Type KSS-213B/S-N
SPECIFICATIONS
PHOTO: MCE-K750
VIDEO CD player
Laser Semiconductor laser
Wavelength 780-790nm
Signal format system NTSC, PAL
Frequency response 2Hz to 20kHz±1dB
Signal-to-noise ratio More than 94dB
General
Power requirements (model for Chinese)
220-240V AC, 50/60Hz
(model for other countries)
110-120V or 220-240VAC,
adjustable, 50/60Hz
Power consumption K550:21W, K750:24W
Dimensions (approx.) 430×108×350mm
(w/h/d) inchl. projecting parts
Mass (approx.) 4.4kg
Supplied accessories
Audio and video connecting cord (1)
Remote commander (remote) RMT-K750V/K550V (1)
Sony SUM-3 (NS) battery (2)
Plug adaptor (1) (except model for China)
Desing and specifications are subject to change without notice.
Outputs
AUDIO OUT
VIDEO OUT
S VIDEO OUT
(K750)
PHONES
Jack
type
Phono
jack
Phono
jack
4-pin mini
DIN
Phono
jack
Maximum
output
level
2V
(at 50 kilohms)
1Vp-p
Y:1Vp-p
C:0.286Vp-p
10mW
Load impedance
Over 10 kilohms
75 ohms, unbalanced,
sync negative, white
peak
75 ohms, unbalanced,
sync negative
32ohms
Maximum
input
level
100mVp-p
Inputs
MIC 1,
MIC 2
Jack
type
Phone
jacks
Load impedance
600ohms

— 2 —
TABLE OF CONTENTS
SAFETY-RELATED COMPONENTWARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Thisapplianceisclassifiedas
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
This caution label is located inside
the unit.
The laser component in this product is
capable of emitting radiation exceeding
the limit for Class 1.
CAUTION
Use of controls or adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
1. SERVICING NOTE ················································ 3
2. TEST MODE ·································································· 4
3. GENERAL ······································································ 6
4. DISASSEMBLY
4-1. CABINET··········································································· 7
4-2. BASE UNIT (BU-5BD24) ················································· 7
5. ELECTRICAL ADJUSTMENTS ····························· 8
6. DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION ···································· 10
6-2. BLOCK DIAGRAM — BD SECTION — ······················ 11
6-3. BLOCK DIAGRAM — MAIN SECTION —················· 13
6-4. SCHEMATIC DIAGRAM — BD SECTION — ············· 16
6-5. PRINTED WIRING BOARD — BD SECTION — ········ 19
6-6. PRINTED WIRING BOARD
— VIDEO SECTION —················································· 21
6-7. SCHEMATIC DIAGRAM
— VIDEO SECTION —·················································· 23
6-8. SCHEMATIC DIAGRAM
— DIAPLAY SECTION — ············································· 27
6-9. PRINTED WIRING BOARD
— DISPLAY SECTION—··············································· 31
6-10. PRINTED WIRING BOARD — MAIN SECTION—··· 33
6-11. SCHEMATIC DIAGRAM — MAIN SECTION—········· 35
6-12. IC BLOCK DIAGRAMS ················································· 38
6-13. IC PIN FUNCTION ························································· 41
7. EXPLODED VIEWS
7-1. CASE SECTION ······························································ 45
7-2. CHASSIS SECTION························································ 46
7-3. MECHANISM DECK SECTION (CDM14M-5BD24)··· 47
7-4. BASE UNIT SECTION (BU-5BD24) ····························· 48
8. ELECRICAL PARTS LIST······································ 49

— 3 —
SECTION 1
SERVICING NOTE
SELF-DIAGNOSIS
This model has the self-diagnosis function for the video and audio
decoder sections.
Immediately after the power on, the self-diagnosis function searches
eachoperationofIC’saroundthemechanismcontrolmicrocomputer
(IC504).
The LED (D502) on the VIDEO board indicates their results.
[VIDEO BOARD] — SIDE A —
HOWTO OPENTHE DISCTRAY WHEN POWER SWITCH
TURNS OFF
Insert a screwdriver into the aperture of the unit bottom, and turn in
the direction of arrow (to OUT direction).
* To close the disc table, turn the screwdriver in the reverse direction
(to IN direction).
NOTES ON HANDLINGTHE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carryout the “S curve check”in“CD section adjustment” and check
that the S curve waveform is output three times.
LED (D101) INDICATION
Light
1 Time blinking (Repeatedly)
2 Time blinking (Repeatedly)
SYMPTOM
No error
Video decoder error
(IC503)
Video RAM error (IC502)
Screwdriver
IN
OUT
Pull out disc table.
IC503
IC502
IC504
D502
SL501
SL503
SL502

— 4 —
SECTION 2
TEST MODE
VIDEO CD COLOR-BARS MODE
On this mode, the data of the color-bars signal as a picture signal
and the 1kHz sine wave signal as a sound signal are output by the
mechanism control microcomputer (IC504) for video CD signal
check. When measurement of the voltage and waveform on the
MAIN board, perform it in this mode.
Forreference, thecolor-barssignal canbe observedat J103 (VIDEO
OUT) and the sound signal can be observed at J104 (AUDIO OUT)
using an oscilloscope.
1. Connect the SL503 (C BAR (MICON)) on the VIDEO board
with solder.
2. Turn the power on.
3. After measuring, remove the soldering installed.
SERVO CHECK MODE
1. Connect the SL502 on the VIDEO board with solder.
2. Turn the power on.
1) Coefficient display and gain display
The following hexadecimal data is displayed on the FL tube
when the JOG SELECTOR key is pressed. Every pressing of
the JOG SELECTOR key toggles between the following
displays.
2) Pressing of the DNR/COMET key toggles between ON and
OFF of the tracking and sled servo.
3) Pressing the PLAY MODE key (KARAOKE PON in K750)
during playback increases the FB value (every 4 steps).
Pressing the REPEAT key (SURROUND in K750) decreases
the FB value (every 4 steps).
4) Pressing the ACTIVE key toggles between the normal speed
and double speed.
5) Pressing the RETURN key toggles between the up FIL and
NO FIL.
6) Pressing A⇔B key performs re-measurement of focus bias.
Display
position→
Display
mode 1
Display
mode 2
Display
mode 3
Display
mode 4
Display
mode 5
Display
mode 6
Display
mode 7
TRACK
01
02
03
04
05
06
07
INDEX
FB POINT
(when jitter
is minimum)
00
TRVSC
RESISTER
VC
OFFSET
FCS AUTO
GAIN
RF PEAK –
RF
BOTTOM
Set the
present FB
REGISTER
value
MIN
AUTO FB
POINT
FB upper
limit
00
FE
OFFSET
00
RF PEAK
00
SEC
RF JITTER
MINIMUM
VALUE
FB lower
limit
TE
RESISTER
RF
OFFSET
TRK AUTO
GAIN
RF
BOTTOM
Present RF
JITTER
value
TRACK
MIN SEC INDEX Initial display (K550)
TRACK
MIN SEC INDEX
Initial display (K750)

— 5 —
Lighting of All Fluorescent IndicatorTube
Displays and Key Check Mode
1. Connect SL501 on the VIDEO board with solder.
2. Turn the power on.
3. All the Fluorescent Indicator tube displays light up.
4. Press any button to enter the key check mode. In the key check
mode, each time a button is pressed, figures displayed on the
Fluorescent Indicator tube displays increase. However, figures
will not increase for buttons which have been pressed once.
The button number corresponding to the button pressed will
also be displayed. Button numbers are displayed only while
the corresponding buttons are pressed.
5. After the test mode, remove the soldering installed.
7-segment display
Initial display (K550)
Initial display (K750)
[ VIDEO BOARD ] — SIDE A —
8888
n
Count up display Button number display
n
Button Name
NEXTˆ
§OPEN/CLOSE
RETURN
PREV
º
‚
DNR
MPX (K750)
L/R/STEREO (K550)
SURROUND (K750)
REPEAT (K550)
KEY CONTROL N
(K750)
KARAOKE STAR
(K750)
KEY CONTROL #
(K750)
KEY CONTROL ˜
(K750)
KARAOKE PON
(K750)
PLAY MODE (K550)
JOG SELECTOR
(PUSH SELECT)
ACTIVE/COMET
p
∏
·
Button Number (Displayed only
while a button is pressed.)
Figure 0E
Figure 16
Figure 30
Figure 31
Figure 33
Figure 34
Figure 48
Figure 50
Figure 5d
Figure 67
Figure 68
Figure 6b
Figure 6c
Figure 77
Figure 81
Figure 88
All Fluorescent Indicator tube
displays light up
Music calendar light up alternately
(K550)
(odd numbor to even number)
KEY indicater light up alternately
(K750)
7-segments displays light up
alternately
The odd number digits and the even
number digit of the upper 7-segments
displays and the lower 7-segments
displays light up alternately.
13
79
5
11 13
17 1915 68
24
10
16 18
12 14 20
↔
IC503
IC502
IC504
D502
SL501
SL503
SL502

— 6 —
SECTION 3
GENERAL
Location of Parts and Controls
Front Panel
Rear Panel
1STANDBY botton
2KEY CONTROL botton (K750 MODEL)
3KARAOKE STAR botton (K750 MODEL)
4OPEN/CLOSE botton
5RETURN/PREV/NEXT botton
6DNR/COMET botton
7ACTIUVE botton
8)botton
90botton
!º JOG SELECTOR
!¡ pbotton
!™ Pbotton
!£ ·botton
!¢ MPX/KARAOKE PON/SURROUND botton (K750
MODEL)
L/R/STEREO/PLAY MODE/REPEAT botton
(K550 MODEL)
!∞ECHO LEVEL/MIC 1 LEVEL/MIC 2 LEVEL/
VOCAL LEVEL/MUSIC LEVEL
!§ MIC1/MIC2 jack
!¶ MIC CONTROL jack (K750 MODEL)
!• PHONES jack-LEVEL
!ª MODE switch (K750 MODEL)
@º MUSIC LEVEL switch (K550 MODEL)
@¡ AUDIO OUT jack
@™ VIDEO OUT jack
@£ S VIDEO OUT jack (K750 MODEL)
@¢ COLOR SYSTEM switch
@∞VOLTAGE SELECTOR switch (Singapore, Malaysia, Taiwan MODEL)
Video CD
12345
67
8
!•
!ª 9
!º
!¡!™!£
!¢!∞
!§
!¶
@º @¡ @™ @£ @¢ @∞
K750
MODEL

— 7 —
SECTION 4
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
4-1. CABINET
• In order to remove the front panel block when the power supply
does not turn on, rotate the cam with screwdriver as the figure
shows, and the disk table will be moved.
Then pull out the disk table by your hand to remove the loading
panel. After that take out the front panel block.
4-2. BASE UNIT (BU-5BD24)
Screwdriver
Pull out disk table
1 Turn the cam to the
direction of arrow
(counter clock wise)
by screwdriver
2 Take off the disk table.
3 Yoke bracket
4 Remove the MD (BU-5BD24)
to the direction of arrow.
BU-5BD24

— 8 —
SECTION 5
ELECTRICAL ADJUSTMENTS
Procedure :
1. Connect oscilloscpe to test point TP (TE) on BD board.
2. Turned Power switch on.
3. Connect the SL502 on the VIDEO board with solder.
4. Put disc (YEDS-18) in to play the number two track.
5. Press the DNR button. (The tracking servo and the sledding
servo are turned OFF.)
6. Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ±22%
Traverse waveform
Note : A clear RF signal waveform means that the shape “◊” can
be clearly distinguished at the center of the waveform.
RF signal waveform
CD SECTION
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
S Curve Check
BD board
TP (FE)
TP (VC)
BD board
TP (RF)
TP (VC)
level : 1.3 p-p
TP (TE)
TP (VC)
BD board
C (DC
voltage)
Tracking servo
Sled servo
ON
Tracking servo
Sled servo
OFF
Procedure :
1. Connect oscilloscope to test point TP (FE) on BD board.
2. Connect between test pointTP (FEI)andTP (VC) byleadwire.
3. Turned Power switch on.
4. Put disc (YEDS-18) in and turned Power switch on again and
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)
5. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B.
And confirm peak to peak level within 3±1 Vp-p.
S-curve waveform
symmetry
within 3 ± 1 Vp-p
A
B
6. After check, remove the lead wire connected in step 2.
Note : • Try to measure several times to make sure than the ratio
ofA : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
Procedure :
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
E-F Balance (Traverse) Check
oscilloscope
oscilloscope
+0.25
–0.20
oscilloscope
7. Press the DNR button. (The tracking servo and sledding servo
are turned ON.) Confirm the C (DC voltage) is almost equal to
the A (DC voltage) is step 6.
Traverse waveform
Center of the waveform
B
A (DC voltage)
level : 1.3
± 0.6 Vp-p
VOLT/DIV : 200mV
TIME/DIV : 500ns
8. Remove the soldering installed in step 3.
0V
0V

— 9 — — 10 —
VIDEO SECTION
Frequency adjustment (NTSC)
1. Connectthefrequenc ycountertoc hec kpointofthe VIDEO
board.
Adjustment Location :
[ BD BOARD ] — SIDE A —
2. Colorsystemswitch (S300) selecttoNTSC andturnthe
POWERswitchON.
3. AdjustCT503 of the VIDEOboar d so thatthefrequenc y
counterread27.0MHz ±80HzatST OPcondition.
Frequency adjustment (PAL)
1. Connectthefrequenc ycountertoc hec kpointofthe VIDEO
board.
2. Colorsystems witc h(S300)selecttoP ALandturnthePO WER
switchON.
3. Adjust CT503 of the VIDEO boar d sothatthe frequenc y
counterread27.0MHz ±80HzatST OPcondition.
VIDEO board
27.0 MHz
frequency counter
GND
VIDEO board
27.0 MHz
frequency counter
GND
[ VIDEO BOARD ] — SIDE A —
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
CN board
BD board
VOL board
MAIN board
VIDEO board
DISPLAY board
LOADING board
MIC board
IC103
20
11
1
10
(RF) (VC)
(FE) (FEI)
IC101
IC513IC512
X505
CT503
IC504
SL503
SL502
SL501
GND 27MHz
CN504

MCE-K550/K750
— 11 — — 12 —
6-2. BLOCK DIAGRAM — BD SECTION —

MCE-K550/K750
6-3. BLOCK DIAGRAM — MAIN SECTION —
— 13 — — 14 — — 15 —
384BD
S700-705
C2PO
72
69
7
13
16
88
81
120
5
6
.
.
.
.
119
LED
DRIVE
Q700
34
31
33
77
100
21
22
79
48
12
38
80
SO1
CLK1
XRST
DNR CS
DVE CS
DF CS
SO1
CLK1
XRST
DNR CS
DVE CS
DF CS
FL CS
OSD CS
24
21
19
17
18
20
23
22
33
54
52
50
48
46
42
40
38
39
41
43
47
49
51
53
55
16
19
22
26
2
5
7
10
31
34
36
39
.
.
.
.
.
.
.
.
.
.
.
..
..
..
..
..
..
.
XRST
DF CS
DVE CS
XRST
.
9
6
4
1
SO1
CLK1
XRST
C BUFFER
Q331-333
Y BUFFER
Q341-343
CV BUFFER
Q371-374
SO1
CLK1
64
63
61
62
40 - 33
DRIVE
MUTE
Q100 MUTE
Q101
MUTE
Q200 MUTE
Q201
MUTE SW
Q310
SO1
CLK1
XRST
DNR CS
RIPPLE FILTER
Q312
RECT
D906
RIPPLE FILTER
Q311
REG
IC304
REG CONT
Q900,901
LRCK
BCLK
ADATA
CTRL2
CTRL1
SCOR
CLK
DATA
MUTE
SQCK
LDON
XLT
SENS
SUBQ
XRST
CN101
SCLK SCLK
MICON
MECHA CONTROL
IC504
2
36
1
4
6
37
10
3
5
18
11
19
SENS
SUBQ
XLT
LDON
SQCK
MUTE
DATA
CLK
SCOR
CONT1
CONT2
2
10
78
6
5
OUT1
OUT2 F IN
M
R IN
MOTOR DRIVE
IC501
3
21
REMOTE
CONTROL
IC700
+7V
+5V
(EVER)
LOADING
MOTOR
28
27
29
30
7SIRCS
LOAD IN
LOAD OUT
IN SW
OUT SW
S152
LOAD IN
S153
LOAD OUT
PAL
AUTO
ON
NTSC
OFF
S300
S720
KEY 0
KARAOKE
N/P SW93
52
90
ADATA
BCLK
LRCK
.
VF2
-30V
(VFDP)
VF1
FL700
Q401
DI
CL
XBLK
CE
FL DRIVE
IC701
S1-S24 C1-C6
AMUTE
XRESET
PWON
XBLK
78
73
13
15
D700
D502
+5V
(EVER)
+5V
(EVER)
PWON LED
TEST LED
X IN
X OUT X502
10MHz
X501
28.63MHz
X503
45MHz
VCDCS
RD
XRW
VCDINT
A3
A0
47
44
46
20
1
234
56
12
13 11
IC507
D7
D0 8
4
MPEG DECODER
IC503
A3
A0
HD7
Y/C PROCESSOR
IC506
8
4
XMWE
XHIRQ
HD0
MA8
MA0
DRAM
IC502
117
116
114
118
97
9
16
A8
A0
MD15
MD0
DQ16
DQ1
XWR
XHCS
XRST
XSGRST
XTL0I
XTL0O
3
2
107
106
35
34
37
13
14
28
29
59
58
57
56
92
95
93
XTL2I
XTL2O
W
RAS
UCAS
LCAS
XRAS
XCAS0
OSD R
OSD G
OSD B
XOSDEN
H SYNC
CBLNK/FSC
V SYNC
DATI
BCKI
LRCI
C2PO
DCLK
FID/FHREF
FSXI
DATA
111
112
110
109
100
89
94
103
16
OSD
IC509
384FS
CS
DATA
CLK
PCL
VR
VG
VB
V CBL
H SYNC
V SYNC
OSC
2
3
1
4
16
17
18
11
20
19
8+5V(D)
13
12 11
IC505(4/4)
12 34
X202
27MHz
IC202
62
3
5
DCLK V SYNC
SDI XSCK XRST XCS
H SYNC
60
67
Y/GO7
Y/GO0
10BIT D/A CONV
IC511
Y7
Y0
8
32
29
24
C OUT
Y OUT
COMP O
98
97
100
31 30 93 29
60
59
62
56
57
48 49 55 51 50
H SYNC
V SYNC
FID
SYS CLK
PD CLK
SCK XRST XVRST XCS SI
D/A CONV
IC508
XRST
ML
L ON
R ON
BCLK
LRCK
6
5
8
22 1
14
12
LINE AMP
IC103(1/2) HP AMP
IC105(1/2) RV300
-1
-2
J300
PHONES
IC103(2/2) IC105(2/2)
C
Y
CV
J103
J102
S VIDEO
OUT
R
+Vcc+V OUT
IC301
UNSWITCHED +5V
IC302
5
41
31
IN
OUT
RESET
+5V(D)
+5V
(UNSW)
+5V(A)
-10V
+10V
-UNREG
+UNREG
+7V 3
2
1
-30V
(VFDP)
VF2
VF1
ICP901
ICP900 T901
POWER
S901
F901
AC
IN
230V
115V
S900
XRST
2 - 7
56 - 42
FLUORESCENT
INDICATOR TUBE
GRID
CLOCK CONT
+5V REG
DIGITAL FILTER
R
L
VIDEO OUT
AUDIO
OUT
BD
BOARD
Signal path
: CD
: CHROMA
: Y
: VIDEO
A
51
58
CRO7
C/RO0 18
11 C7
C0
8
63
70
27
20
R/Cr7
R/Cr0 8CRI7
C/RI0
71
73
76
80
.
G/Y7
G/Y0 8Y/GI7
Y/GI0
18
11
DSP XRST
24
K550 MODEL
K750 MODEL
KARAOKE K750
MODEL
ENCODER
S707-712 KEY 191
25
26 JOG 1
JOG 2
S713-719 KEY 292
95
STANDBY
49
50 KDSP CS
KDSP RDY
KDSP CS
KDSP RDY
54
53
MODE2
MODE1
+5V(D)
K550 MODEL
K750 MODEL
MUSIC
VOL VOCAL VOL
94
+5V
(EVER)
12dB
9dB
OFF
AUDIO
ATT
RV301 RV302
S301
VOCAL VOL
MUSIC VOL
89
97
MIC CONT
ECHO VOL
S35-40
22 - 17
LED
DRIVE
Q701-706
D701-706
6
C1
C1
5
46
+5V(D) IC505(3/4)
1
23
+5V(D) IC505(1/4)
10
98
IC505(2/4)
+5V(D)
QCK
DQ
DIVIDER
IC513(2/2)
812
11
9QCK
DQ
DIVIDER
IC513(1/2)
18
19
X504
33MHz
XTI
XTO
DI
10
16
LO
RO
LPF
IC101(1/2) LPF IC102(1/2)
SO1
CLK1 MD
MC
23 24
KDSP CS
KDSP RDY
D/A CONV
IC510
XLT
READY
AO1N
AO2N
BCK
LRCK
92
93
94
199
33
39
DIGITAL FILTER
SI
40
34
AO1P
AO2P
XRST
CLK1 XRST
SCK
898
MLEN
3
BFOI
14
SO1 RVDT
4
AIN3 20
21
LO3
IC401(2/2)
MIX AMP
IC401(2/2) MIC AMP
IC400(1/2)
MIC1 VOL
RV400
MIC2 VOL
RV401 MIC AMP
IC400(2/2)
MIC 1
IN
MIC 2
IN
MIC
CONTROL
K750 MODEL
911
IC402
OUT IN
ECHO UNIT
K550 MODEL
K750 MODEL
LL
R
R
LL
L
5
R
LL
L
AUDIO OUT 1
AUDIO OUT 2
VIDEO
OUT
J104
K750 MODEL
K550 MODEL
K750 MODEL
D901
D903
D904
D905
Q309
POWER
SW
Q305
POWER
SW
Q313
Q314
IN–V OUT
–5V REG
IC305
32
–5V
CHINESE,
MODEL SINGAPORE,
MALAYSIA,TAIWAN
MODEL
7
7
5
6
3
21
3
1
5
7
31
7
5
13

MCE-K550/K750
6-12. IC BLOCK DIAGRAMS
52
51
F1
XVRST
50
XCS
49
SCK
48
SI
47
VSS
46
TDO
45
TCK
44
TMS
43
TDI
42
VDD
41
TRST
40
VSS XTEST1 XTEST3
36
TD8
35
TD9
34
VDD
33
TD1O
53VDD
54XTEST4
55XRST
56SYSCLK
57PDCLK 58VSS 59VSYNC 60HSYNC 61SO 62FID 63VDD 64XIICEN 1/2
SYNC Gen.
and
Timing Controller
SIO and I
2
O-Bus
Controller
3
8
Sub Carrier
Gen.
Modulator
Dempx,
Level
Translator
and
Interpolator
4 : 2 : 2 to
4 : 4 : 4
Y, C/
Y, U, V
selector and
Interpolator
SYNC Slope
Gen.
Closed Caption Encoder
(for NTSC)
CSYNC
CHROMA
V
U
Y
BURST FLAG
37-39
-
TEST MODE
10
VDD
19
VSS
C7 C0
11-18
-
5
VSS
Y3 Y0
6-9
-
Y7 Y4
1-4
-
Delay 10bit
DAC
10bit
DAC
10bit
DAC
LPF
LPF
29 YO
28 AVSS2
27 AVDD2
26 VG
25 VB
24 COMPO
23 AVSS1
22 AVDD1
21 VREF
20 IREF
30 AVDD3
31 AVSS3
32 CO
4 4
8
1
2
INPUT OUTPUT
Cd
5
RESET
OUT
4
GND
3
START
UP Vref PROTECTOR
RESET
VO
DETECTOR
ERROR
AMP
12 3 45 6 7 8 9 10
GND
MOTOR
DRIVE
NOISE
FILTER
CLAMP
FWD.IN
REV.IN
VCC 1 VCC 2
NOISE
FILTER
MOTOR
DRIVE
MOTOR
DRIVE
MOTOR
DRIVE
T.S.D O.C.P
FWD/REV/STOP
CONTROL LOGIC
14
1 2 3 4 5 6 7
13 12 11 10 9 8
VCC
GND
CKCLR
CKCLR
Q
PR
Q
Q
PR
Q
D
D
IC509 BU6257AFV-E2
IC302 L78LR05D IC513 SN74HC74ANS
IC510 CXD2721Q-1
IC511 CXD1913Q
IC701 LC75725E
IC501 LB1641
— 38 — — 39 — — 40 —
DATA INPUT
1
2
3
4
5
6
7
8
9
10
13
11
PROTECTION
CIRCUIT
VIDEO RAM
CHARACTERCHARACTER
SIZE
REGISTER
DATA SELECTOR
DATA
3-BIT
288
WORD
COLOR
DATA
3-BIT
WORD
CHARACTER
DATA
8-BIT
WORD
SHIFT REGISTER
HSYNC
VSYNC
VB
VG
VR
VBLK
VC2
BLK2
VC1
BLK1
CS
DATA
CLK
RESET
VDD
CKOUT
OSCOUT
OSCIN
TEST
VSS
VERTICAL
ADDRESS
COUNTER
TEST
CIRCUIT
OSCILLATION
CIRCUIT
COUNTER COUNTER
POSITION ADDRESS
COUNTER
HORIZONTAL
HORIZONTAL HORIZONTAL HORIZONTAL
ADDRESS
REGISTER
WRITE
ADDRESS
SIZE
COUNTER
VERTICAL
SIZE COUNTER
VERTICAL
POSITION COUNTER
VERTICAL
BACKGROUND
CONTROL
DATA
REGISTER
ADDRESS
COUNTER
DISPLAY
CONTROL
DATA
REGISTER
OUTPUT CONTROL
CHARACTER
GENERATOR
ROM
12X18-BIT
X255-WORD
x288 x288 x
20
19
18
17
16
15
14
12