CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY,
NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURER’S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOTONLY
VOID THE WARRANTY, BUTMAYLEAD TO YOUR BEING LIABLE FOR ANY
RESULTING PROPERTYDAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE
THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY
CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE,
INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE
USER.
WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM A.C. LINE SHOCK.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRCTED. A
CHECK SHOULD BE MADE OF THE FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD
1. BE SURE THATALL COMPONENTS ARE POSITIONED IN SUCH AWAY
AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS.
THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE
TRANSPORTED TO AND FROM THE REPAIR SHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES
SUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN
RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVE
BEEN REINSTALLED PER ORIGINAL DESIGN. BE SURE THAT THE
SAFETY PURPOSE OF THE POLARIZED LINE PLUG HAS NOT BEEN
DEFEATED.
3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD
SOLDER JOINTS, SOLDER SPLASHES OR SHARP SOLDER POINTS.
BE CERTAIN TO REMOVE ALLLOOSE FOREIGN PARTICLES.
4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATION
TO PARTS AND COMPONENTS. FOR FRAYED LEADS, DAMAGED
INSULATION (INCLUDING A.C. CORD). AND REPLACE IF NECESSARY
FOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE OR
A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND
PROTRUNING METALSURFACES MUST BE AVOIDED.
6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF
RESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACT
FACTORY TYPES, DO NOT USE REPLACEMENT COMPONENTS
OTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIRCUIT MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN A.C.
LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HANDLE AND SCREWS) TO BE SURE THE SET IS SAFE TO OPERATE
WITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE
ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. VOLTMETER, HAVING 5000 OHMS PER VOLT OR MORE SENSITIVITY, IN
THE FOLLOWING MANNER; CONNECT A 1500 OHM 10 WATT RESISTOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITOR
BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME.
MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500
OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG
AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED
METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75
VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY
VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK
HAZARD AND MUST BE CORRECTED IMMEDIATELY.
SUBJECT: GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN
AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE
SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED
“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAG-
NITUDE TO CONSTITUTE ARISK OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO
THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN
SERVICE LITERATURE.
SUBJECT : X-RADIATION
1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTENTIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PICTURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN
THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE
PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIRCUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIRABLE LEVELS.
2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BE
USED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN
COLOR SETS, ALWAYS RE-INSTALL THEM.
3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN
ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRA
TION OF THE METER SHOULD BE CHECKED PERIODICALLY
AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE
ATYOUR DISTRIBUTOR.
4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY
THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY
TIME A COLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULD
BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE
WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES
NOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATING
CORRECTLY, WE SUGGEST THAT YOU AND YOUR SERVICE ORGANIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGULATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCEDURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON
EACH CUSTOMER’S INVOICE.
5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN
A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE,
AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND
THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT
LONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCES
SIVE VOLTAGE.
6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES
DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS
(WHERE USED).
SUBJECT: IMPLOSION
1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE
GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE
TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID
SCRATCHING THE TUBE. IF SCRATCHED REPLACE IT.
2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.
SUBJECT : TIPS ON PROPER INSTALLATION
1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO
HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW.
2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO
INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS WHERE STEAM LEAKAGE IS AFACTOR, ETC.
3. AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REAR
VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT
OBSTRUCT VENTILATION.
4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCIAL MOUNTING KIT. MUST FOLLOW THE FACTORY APPROVED
MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A SHELF OR
PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT
THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW
ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS
MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE
TEST ON CUSTOMIZED INSTALLATIONS.
5. CAUTION CUSTOMERS AGAINSTTHE MOUNTING OF A PRODUCT ON
SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS
PROPERLY SECURED.
6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS
MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLLA CART WITH SMALL CASTERS ACROSS
THRESHOLDS OR DEEP PILE CARPETS.
7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND
WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES,
INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION
RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.’S OF
THE SAME OR LARGER SCREEN SIZE.
8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS,
EXPLAIN THATA FOREST OF EXTENSIONS SPROUTING FROM ASINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO
HOME AND FAMILY.
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
A.C. VOLTMETER
GOOD EARTH GROUND
SUCH AS THE WATER
PIPE. CONDUIT. ETC
PLACE THIS PROBE
ON EACH EXPOSED
METALPART
1-4
SERVICING PRECAUTIONS
CAUTION : Before servicing the DVD covered by this service
data and its supplements and addends, read and follow the
SAFETY PRECAUTIONS. NOTE : if unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions in this publications, always follow the safety precautions.
Remembers Safety First:
General Servicing Precautions
1. Always unplug the DVD AC power cord from the AC
power source before:
(1)Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnection or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an elec-
trolytic capacitor.
Caution : A wrong part substitution or incorrect
polarity installation of electrolytic capacitors may result
in an explosion hazard.
2. Do not spray chemicals on or near this DVD or any of
its assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cotton-tipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
whitch instruments covered by this service manual might
be equipped.
5. Do not apply AC power to this DVD and/or any of its
electrical assemblies unless all solid-state device heat
sinks are cerrectly installed.
6. Always connect test instrument ground lead to the
appropriate ground before connection the test instrument
positive lead. Always remove the test instrument ground
lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn
the power on. Connect an insulation resistance meter(500V)
to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1Mohm.
Note 1 : Accessible Conductive Parts including Metal panels, Input terminals, Earphone jacks, etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some field
effect transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which
should be removed for potential shock reasons prior to
applying power to the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such
as aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grouned-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static solder removal device. Some
solder removal devices not classified a “anti-static” can
generate electrical charges sufficient to damage ES
devices.
5. Do not use freon-propelled chemicals. These can
generate electrical charge sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its protec
tive package until immediately before you are ready to
install it. (Most replacement ES devices are packaged with
leads electrically shorted together by conductive foam,
aluminum foil, or comparable conductive material).
7. Immediately before removing the protective material from
the leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.
Caution : Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Normally harmless motion such
as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.)
1-5
SERVICE INFORMATION FOR EEPROM
POWER ON
DVD LOGO Status (NO Disk status)
Remotecontrol
Pause key-->1-->4-->7-->2 in order.
Press number 0~9, Press charater
A~F (1~6 for a while)
Use arrow key (
F D G E
) to move
to approprite position and make
changes
Press pause key once
Change will be applied when power
OFF-->ON.
MODEL DVB611
NAMEHEX
OPT 155(U)
OPT 253(S)
OPT 300(ENG)
OPT 445
OPT 502
OPT 655
OPT 7E4
DETECT NEW EEPROM
(OPTION EDIT SCREEN)
1-6
SPECIFICATIONS
• GENERAL
Power requirements: AC 120V , 60Hz
Power consumption: 8W
Dimensions (Approx.): 430 x 35 x 242 mm (17 x 1.4 x 9.5 inches) (W x H x D) without foot
Weight (Approx.): 1.7 kg (3.7 lbs)
Operating temperature:5 °C to 35 °C (41 °F to 95 °F)
Operating humidity: 5 % to 90 %
• OUTPUTS
VIDEO OUT:1 V (p-p), 75 Ω, sync negative, RCA jack x 1
S-VIDEO OUT:(Y) 1.0 V (p-p), 75 Ω, negative sync, Mini DIN 4-pin x 1
(C) 0.3 V (p-p) 75 Ω
COMPONENT VIDEO OUT:(Y) 1.0 V (p-p), 75 Ω,negative sync, RCA jack x 1
(Pb)/(Pr) 0.7 V (p-p), 75 Ω, RCA jack x 2
AUDIO OUT:2.0 Vrms (1 KHz, 0 dB), 600 Ω, RCA jack (L, R) x 1
DIGITAL OUT (COAXIAL):0.5 V (p-p), 75 Ω, RCA jack x 1
DIGITAL OUT (OPTICAL) (OPTIONAL): 3 V (p-p), 75 Ω, Optical jack x 1
• SYSTEM
Laser:Semiconductor laser, wavelength 650 nm
Signal system: PAL / NTSC
Frequency response:DVD (PCM 96 kHz): 8 Hz to 44 kHz
DVD (PCM 48 kHz): 8 Hz to 22 kHz
CD: 8 Hz to 20 kHz
Signal-to-noise ratio:More than 100 dB (ANALOG OUT connectors only)
Harmonic distortion: Less than 0.008%
Dynamic range:More than 95 dB (DVD/CD)
Make sure the main PCBA don't short on
VCCs and switch it on.
YES
Is 3.3V outputs normal on main PCBA?
YES
Connect to PC RS232 Cable and update
the FLASH memory code.
YES
Update FLASH successfully?
YES
A
Replace power PCBA or AC transformer.
NO
Repair or Replace Power PCBA
NO
Check the regulators or related diodes.
NO
Is 1.8V Voltage normal for Zoran IC
YES
1. Check Q203. 2. Check D201.
3. Check IC102
NO
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal
PRD,RWR.
4. Check RS232 SIGNALS.
5. Check FLASH Memory related circuit.
NO
3-5
NO
NO
YESYES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
A
RESET or Power On.
Flash Memory operates
properly?
Show LOGO?
Does Tray move inside when
it is not at closed position?
B
Check connection lines between
FLASH & ZR336888 and the FLASH
access time whether is suitable or not.
SDRAM works properly?
Check connection lines
between SDRAM & ZR36882
and the SDRAM is damaged.
ZR36882 VIDEO outputs
properly?
Check the related circuit of
ZR36882
Have TV signal output?
Check AV cable connection
to TV set.
Normal OUTSW & INSW
signals?
Check the filtering and amp
circuit of TV signal.
Check the load OPEN &
CLOSE switch
Normal OPEN & CLOSE
signal?
Check the Tray control IO
pins on ZR36882 &
AM5869S
Normal LOAD+ & LOAD
signal?
Check the cable connection
between main PCBA and
loader.
Check the Tray control
amplifying circuit on Motor
driver.
3-6
B
Motor Driver MUTE Pin is
High?
Does the SLED move to
inner side when it is at outter
position?
Do not put in disc and tray
close.
Optical Lens has movements
for searching Focus?
C
NO
NO
YES
YES
YES
YES
YES
YES
Check the connection line of
MUTE signal.
NO
Is SLED_S DC Level higher
than 1.65V?
Check the related circuit of
FMSO.
NO
SLED+ and SLED- output
properly?
YES
Check the amp circuit on
motor driver.
Check FOCUS_S connection
On ZR36882 and motor dirver.
NO
NO
Check the cable connection
with MECHA.
Proper FOCUS_S outputs to
motor driver?
Proper FACT+ & FACT outputs?
Check the amp circuit on
motor dirver.
NO
Check cable connect on with
pick-up head.
3-7
C
LD_DVD or LD_CD
output properly?
Laser turns on when
reading disc?
Put disc in?
Disc ID is correct?
Does spindle rotate?
D
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Check the laser power circuit
on ZR36882 and connecting
to power transistor.
NO
Collector voltage of power
transistor is OK?
Check the related circuit on
laser power transistor
NO
Check cable connection
between transistor ouput
and pick-up head.
YES
YES
YES
Check the related circuit
on ZR36882 RFL signal.
Check SPINDLE_S related
circuit on ZR36882.
NO
NO
Check the spindle control
amp circuit of motor driver.
NO
Laser off
Proper RF signal on
ZR36882?
Check LD_DVD & LD_CD
signal
Proper SPINDLE_S signal
on ZR36882
SP+ & SP- output properly?
Check the cable connection
between spindle and main
PCBA.
3-8
D
Proper signals on A,B,C,D
of ZR36882
Focus ON OK?
Track On OK?
Disc is play ?
E
NO
NO
NO
YES
YES
YES
YES
YES
Check connections between
ZR36882 and pick-up head.
NO
Check FE signal on
ZR36882
YES
Check the FOCUS_S
connection on ZR36882
and motor driver.
NO
Check FOCUS_S signal
on ZR36882
YES
YES
Check the TRACK_S
connection on ZR36882
and motor dirver.
NO
Check the tracking control
amp circuit on motor driver.
NO
Normal TE Signal on
ZR36882?
NO
Check the related
circuit on ZR36882
Properly TRACK_S signal
on ZR36882?
TACT+ & TACT- output
properly?
Check cable connection on
pick-up head.
Check RF signal waveform.
3-9
E
Audio DAC received
correct data stream?
Normal Audio output
when disc playback?
Normal IR.VFD & Front
panel key functions?
TEST END
NO
NO
YES
YES
YES
YES
Check connection between
ZR36882 & Audio DAC.
NO
Normal Audio DAC out?
YES
Check the related circuit of
Audio DAC.
NO
Check Audio filter, amplify,
mute circuit.
Communications between
IR.VFD Front panel key &
ZR36882 is normally?
NO
Check communication lines
on ZR36882
Check the cable connection
on Front panel.
3-10
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 27MHz CLOCK, RESET SIGNAL
1) ZR36882 main clock is at 27MH(X601)
FIG 1-1
3.1V,27MHz
2) ZR3682 reset is low active
FIG 1-2
Reset Time
3.3VA
PWR_CTL
RESET
3-11
2. SDRAM CLOCK
1) SDRAM clock is at 143MHz
FIG 2-1
IC603 PIN38
CLK=143MHz,Vp-p=3.3V
3. TRAY OPEN/CLOSE SIGNAL
1) Tray open/close waveform
FIG 3-1
OPEN
OPENCLOSE
CLOSE
LM-
LM+
3-12
2) Tray open waveform
FIG 3-2
3) Tray close waveform
FIG 3-3
OPEN
CLOSE
LM-
LM+
OPEN
CLOSE
LM-
LM+
3-13
4. SLED CONTROL RELATED SIGNAL(NO DISC CONDITION)
FIG 4-1
5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)
FIG 5-1
FOCUS_S
FOCUS+
FOCUS-
SLED_S
DRVSB
SLED+
SLED-
3-14
6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)
FIG 6-1
7. DISC TYPE JUDGEMENT WAVEFORM
FIG 7-1(DVD)
DCLK = 128MHz, Vp-p=2.2, Vmax=2.7V
FACT+
FE
SBAD
VR_CD
DVD_LD
CD_LD
3-15
FIG 7-2 (DVD)
FIG 7-3 (CD)
FACT+
FACT+
FE
FE
SBAD
SBAD
3-16
FIG 7-4 (CD)
8. FOCUS ON WAVEFORM
FIG 8-1 (DVD)
FE
FOSO
FACT+
FACT-
FACT+
FE
SBAD
3-173-17
FIG 8-2 (CD)
9. SPINDLE CONTROL WAVEFORM(NO DISC CONDITION)
(DVD) FIG 9-1
FOCUS
FACT+
SPINDLE_S
SP+
SP-
FE
FACT-
3-18
10. TRACKING CONTROL RELATED SIGNAL(System checking)
FIG 10-1 (DVD)
FIG 10-2 (CD)
TE
TRACK_S
TACT+
TACT-
TE
TRACK_S
TACT+
TACT-
3-19
11. RF WAVEFORM
FIG 11-1
12. ZR36882 AUDIO OPTICAL AND COAXIAL OUTPUT(SPDIF)
FIG 12-1
RFO
SPDIF
3-20
13. ZR36882 VIDEO OUTPUT WAVEFORM
1) Full colorbar signal(CVBS)
FIG 13-1
2) Y
FIG 13-2
JK702 pin6
JK702 pin7
3-21
14. AUDIO OUTPUT FROM AUDIO DAC
1) AUDIO L/R
FIG 14-1
3) C
FIG 13-3
JK702 PIN8
JK702 PIN4,5
1KHz 0DB
3-22
2) Audio Related Signal
FIG 14-2
AOUT0
ABCK
ALRCLK
3-23
BLOCK DIAGRAMS
1. Overall Block Diagram
M
M
DISC
SPINDLE
MOTOR
LOADING
MOTOR
DECK MECHANISM
DVD : A,B,C,D,RF
CD : A,B,C,D,E,F,RF
PICK
UP
B/Pb
IC604
MX29LV160TTC
16/32BIT
FLASH ROM
MEMAD[0:19]
FLASHCS-
MEMWR-
MEMRD-
RAMDAT[00:15]
L/R
CVBS
R/Pr G/Y
TV_DAC[0:3]
Y
C
L/R
IC605
S524A40
EEPROM
LOAD[+,-]
FACT[+,-]
TACT[+,-]
SP [+,-]
SLED
(FEEDING)
MOTOR
SLED[+,-]
M
V33DA
V33A
V18A/V33A
5V
ABCK
ALRCK
AOUT0
IC701
MM1692XVBE
VIDEO BUFFER
ASPDIF
COAXIAL
SPDIF
CD_LD,DVD_LD,VC
5.6VA
INSW,OUTSW
MEMDA[0:15]
DMUTE
I2CCLK/MC
IC603
ESMT_M12L64164A
4M/16BIT
SDRAM
V33A
RAMAD[00:11]
RAMCKE
PCLK
RAMBA
RAMCS1
RAMDQM
RAMWE
RAMCAS
RAMRAS
I2CDAT/MD
IC601
ZORAN ZR36882
5V
YC_MIX
AMCLK,ML
OPEN,CLOSE,SLED_S,SPINDLE_S,FOCUS_S,TRACK_S
CD_DVD, VR_CD,VR_DVD
CD_DVD
CN601
Download
I/F
DUPTR0
IC703
PCM1753
2DAC
IC201
AM5869S
Motor Drive
DRVSB
PICKSEL
Pick-up
RF+DSP
MPEG IC
IC702
MC4580
OP-AMP
+12V
KEY Input
5V
12V
27MHz
RC901
R/C
IC901
PT6963
LED DRIVER
IR
POWER
BOARD
POWCTL_H
3.3V
3.3VA
DIG901
LED Cloc k
5V
Din
Dout
CLK STB
3
Power
Key
Power
On
AC 90V~240V
50HZ/60Hz
5.6VA
IC606
KIA7027
RESET IC
RESET
SPDL_SENS+ ,1.8VA
DUPTD0
TR
A_MUTE_R/L
3.3VA
3-24
2. Power(SMPS) Block Diagram
8V
3.2V
FILTER
SWITCHING IC
TRANS
FEED B.
3.4VA
RECTIFIER(5.6V)
RECTIFIER(9.5V)
LPF
RECTIFIER(14V)
LPF
12V
PWR CTL
5V
5.6V(M)
/ 5.6VA
RECTIFIER(3.4V)
LPF
AC100~240V
RECTIFIER
REG.
T/ W
3-25
IC201
AM5869S
Motor Dr iver
DVD: A,B,C,D, RFO
CD: A,B,C,D, E, F,RFO
SP+, SP-
M/D
PICK
UP
X601
IC601
ZR36882
DVDPLAYER
ONE CHIP
OPEN,CLOSE,SLED_S,SPINDLE_S,
FOCUS_S,TRACK_S, DRVSB
SPDL_SENS+ ,1.8VA
FACT+, FACT-
TACT+, TACT-
SLED+, SLED-
LOAD+, LOAD-
27MHz
X-TAL
CD_LD,DVD_LD
CD_DVD
ALPC
V20, PICKSEL
TRIN,TROUT
IC603
4M x 16bit
SDRAM
RAMADD[0:11]
RAMDQM,
RAMCKE
PCLK,RAMBA
RAMCS1,RAMWE
RAMCAS,RAMRAS
RAMDAT[0:15]
FLASH
ROM
MEMWR,MEMRD
MEMCS
MEMDA[0:15]
MEMAD[0:19]
EEP
ROM
I2CCLK
I2CDAT
RS232C(MTK)
DUPTD0
DUPTR0
VR_DVD,VR_CD
3. SERVO Block Diagram
3-26
4. MPEG & MEMORY Block Diagram
IC605
EEPROM
IC601 (MPEG + DSP + RF)
ZR36882
IC604
FLASH MEMORY
(16 M )
VIDEO
Interface
AUDIO
Interface
IC901
LED DRIVE IC
IC603
SDRAM
64M
RAMAD[00:11] ,RAMCKE
PCLK ,RAMBA,RAMCS1
RAMDQM ,RAMWE
RAMCAS
RAMRAS
RAMDAT[00:15]
X601
27MHz
C_Y,S_Y
SY_Pr_OUT,Y_OUT,SC_Pb_out
RGB_SEL,16_9_H
AMCLK,ALRCK,ABCK
D_MUTE
AOUT0.ML
I2CCLK/MC, I2CDAT/MD
ASPDIF
FLASHCS-
MEMWR-
MEMRD
MEMAD[0:19]
MEMDA[0:15]
DIN ,DOUT
CLK,STB
IC606
RESET IC
RESET
I2CCLK/MC
I2CDAT/MD
3-27
5. VIDEO & AUDIO Block Diagram
IC701
VIDEO 6dB
Amp
IC703
AUDIO DAC
(2CH)
IC672 (OP Amp)
LPF&Buffer
CVBS
COMPONENT (R.G.B) / (Y.Pb.Pr )
SUPER VIDEO (Y/C)
(SY_Pr_OUT,Y_OUT,SC_Pb_OUT )
(C_Y/S_Y)
AMCLK
ABCK
ALRCK
A/V
JACK
MPEG
MPEG
AUDIO "L"
AUDIO "R"
AOUT0
ML
3-283-29
CIRCUIT DIAGRAMS
1. POWER(SMPS) CIRCUIT DIAGRAM
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE ZENITH ELECTRONICS CORPORATION.
ALL COMPONENTS SHOULD BE REPLACED ONLY
WITH TYPES IDENTICAL TO THOSE IN THE ORIGI-
NAL CIRCUIT. SPECIALCOMPONENTS ARE SHADED
ON THE SCHEMATIC FOR EASYIDENTIFICATION.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED. THIS WAY,
IMPLEMENTATION OF THE LATEST SAFETY AND
PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTILTHE NEW SERVICE
LITERATURE IS PRINTED.
NOTE :
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter
during Play mode.
No Power
D105~D108 is Defective
14VA No Power
D125 is Defective
5.0V No Power
Q126 is Defective
12V No Power
Q123 is Defective
Switching Error
IC101is Defective
No Power
FR101 is Defective
Switching Error
IC102,IC103 are Defective
5.6VA No Power
D123 is Defective
OPTIONAL PART
3.3VA No Power
D121 or D122 are Defective
5.6V No Power
Q125 is Defective
3.3V No Power
Q121 is Defective
NOTES) Symbol denotes AC ground.
NOTES) Symbol denotes DC chassis ground.
ABCDEFGHIJKLMNOPQRST
NOTE) Warning
NOTE) Parts that are shaded are critical
NOTE) With respect to risk of fire or
NOTE) electricial shock.