NAD M5 C/AH User manual

SERVICE MANUAL
M5 C/AH
MODEL : M5 C/AH
SERVICE MANUAL
© NAD 2006
NAD ELECTRONICS INTERNATIONAL
TORONTO
M5 C/AH
CD/SACD PLAYER
M5 C/AH
CD/SACD PLAYER
CD/SACD PLAYER
SERVICE MANUAL

CONTENTS
SECTION 1 . . . .SUMMARY
SECTION 2 . . . .CABINET & MAIN CHASSIS
SECTION 3 . . . .ELECTRICAL
SECTION 4 . . . .MECHANISM
SECTION 5 . . . .REPLACEMENT PARTS LIST

SECTION 1 SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS ............. 1-2
SERVICING PRECAUTIONS ........................................................................... 1-3
• General Servicing Precautions
• Insulation Checking Prodedure
• Electrostatically Sensitive Devices
SPECIFICATIONS ........................................................................................... 1-4
1-1

SUBJECT: GRAPHIC SYMBOLS
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS
A.C. VOLTMETER
GOOD EARTH GROUND
SUCH AS THE WATER
PIPE. CONDUIT. ETC
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
CAUTION : DO NOT ATTEMPT TO MODIFY THIS
PRODUCT IN ANY WAY, NEVER PERFORM CUSTOM-
IZED INSTALLATIONS WITHOUT MANUFACTURER’S
APPROVAL. UNAUTHORIZED MODIFICATIONS WILL
NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO
YOUR BEING LIABLE FOR ANY RESULTING PROP-
ERTY DAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY
AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL
OF THE FOLLOWING SAFETY CHECKS AND SERVIC-
ING GUIDELINES. TO DO OTHERWISE,INCREASES
THE RISK OF POTENTIAL HAZARDS AND INJURY TO
THE USER.
WHILE SERVICING, USE AN ISOLATION TRANS-
FORMER FOR PROTECTION FROM A.C. LINESHOCK.
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 THAT ALL COMPONENTS ARE POSI-
TIONED IN SUCH A WAY AS TO AVOID POSSIBILITY
OF ADJACENT COMPONENT SHORTS.THIS IS ESPE-
CIALLY IMPORTANT ON THOSE MODULES WHICH
ARE TRANSPORTED TO AND FROM THE REPAIR
SHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTEC-
TIVE 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 POLAR-
IZED LINE PLUG HAS NOT BEEN DEFEATED.
3. SOLDERING MUST BE INSPECTED TO DISCOVER
POSSIBLE COLD SOLDER JOINTS, SOLDER
SPLASHES OR SHARP SOLDER POINTS. BE CER-
TAIN TO REMOVE ALL LOOSE 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 NECES-
5. NO LEAD OR COMPONENT SHOULD TOUCH A
RECIVING TUBE OR A RESISTOR RATED AT 1 WATT
OR MORE. LEAD TENSION AROUND PROTRUNING
METAL SURFACES 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 UNRECOM-
MENDED CIRCUIT MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PER-
FORM 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 TRANS-
FORMER DURING THIS TEST USE AN A.C. VOLTME-
TER, HAVING 5000 OHMS PER VOLT OR MORE SEN-
SITIVITY, 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. VOLT-
AGE ACROSS THE COMBINATION OF 1500OHM
RESISTOR AND .15 MFD CAPACITOR. REVERSE THE
A.C. PLUG AND REPEAT A.C. VOLTAGE MEASURE-
MENTS FOR EACH EXPOSED METALLIC PART. VOLT-
AGE 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 COR-
RECTED IMMEDIATELY.
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 MAGNITUDE TO CONSTITUTE A RISK 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.
1-2

SERVICING PRECAUTIONS
CAUTION:Before servicing the Stereo amplifier 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 publication,
always follow the safety precautions.
Remember Safety First:
General Servicing Precautions
1. Always unplug the Stereo amplifier AC power cord from the
AC power source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnecting or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an electrolytic
capacitor.
Caution: A wrong part substitute or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Do not spray chemicals on or near this Stereo amplifier 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,
cottontipped 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
which instruments covered by this service manual might be
equipped.
5. Do not apply AC power to this Stereo amplifier and/or any
of its electrical assemblies unless all solid-state device heat
sinks are correctly installed.
6. Always connect test instrument ground lead to the
appropriate ground before connecting 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 1 M-ohm.
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 handing 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 reason 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 grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an antistatic 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 freonpropelled chemicals. These can generate
electrical charge sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
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 handing 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.)
1-3

SPECIFICATIONS
•GENERAL
Power requirements: AC 100-240 V , 50/60 Hz
Power consumption: 45W
Dimensions (Approx.): 435 x 100 x 300 mm (W xHxD)without foot
Weight (Approx.): 8.6 kg
Operating temperature: 5 °C to 35 °C (41 °F to 95 °F)
Operating humidity: 5 % to 90 %
• OUTPUTS
VIDEO OUT: 1 Vp-p 75  sync negative, RCA jack x 1
AUDIO OUT: 2.0 Vrms (1 KHz, 0 dB),
60 &+8QEDODQFH%DODQFH
PXWL&+
RCA jack (L, R) x 1/ XLR jack (L, R) x 1/ RCA jack(6-ch) x 1
DIGITAL OUT (COAXIAL): 0.5 V (p-p), 75  RCA jack x 2SWLFDO[ 1,AES/EBU x 1
• System
Laser: Semiconductor ODVer, ZDYHOHQgth 650 nm
6LJQDO system: PAL / PAL 6 0 / NTSC
Frequency response: SACD:8Hzto50kHz
CD: 8 Hz to 20 kHz
SLJQDO-to-noise ratio(A-W): More than 110 dB (2CH ANALOG OUT )
More than 100 dB (muti-CH ANALOG OUT )
Harmonic distortion: Less than 0.005%
Dynamic range: More than
More than 105dB (SACD 2-ch)
95dB (CD/SACD muti-ch)
• Accessories
Video FDEOe (1), Audio FDEOe (1), Remote controO(1), Batteries (2)
1-4

SECTION 2 CABINET & MAIN CHASSIS
CONTENTS
EXPLODED VIEWS................................................................................................................ 2-2
1. Cabinet and Main Frame Section ................................................................................ 2-2,3
2. Exploded view parts list........................................................................................................ 2-4
3. Packing accessory section............................................................................................2-5
2-1

1.Cabinet and main frame section
EXPLODED VIEWS
S011
S001
C017
S020
F001
F002
F003
F004
F006
F005
F007
F008
F009
F010
F013
F011 F01 2
F014
F015
F017
FP01
S008
FP03
T001
C001
C002
C003
C004
C006
C007
C008
C009
P001
C011
C010
C012
C013
C014
C015
C016
C016
R001
R002
R003 RS01
F016
F018
T002
T003
S001
S003
S004
S005 S0 06
S008
S007
S009
S010
S013
S012
S010
S021
S014
S012
S015
S002
S016
S019
S008
S008
C005
C016
FP02
S017
S018
A001
A002
A003
A004
A003
A005
2-2 2-3

2.EXPLODED VIEW PARTS LIST
REF.NO. PART NO. DESCRIPTION Qty. REF.NO. PART NO. DESCRIPTION Qty.
1revoCpoT0-200150-76100T1sissahC0-200760-76100C
C002 01-50501-00 Decode Board 1 T002 86-018002-1 Expanded Rubber 2
C003 01-50502-00 Audio Board 1 T003 76-046001-0 Screw Washer 4
C004 01-50505-00 RS232 Board 1
C005 18-55017-20 R Type Transformer(C Version) 1
18-55017-10 R Type Transformer(AH Version) 2tekcarB0-010010-6610SR1
C006 68-051002-1 Shielding Box(down) 1
2revoCeludoM0-100840-0
7100A1draoBUSP00-30555-10700C
C008 68-051001-1 Shielding Box(up) 1 A002 66-048001-0 Module Tr. Braccket 4
C009 85-051001-0 Snap Bushing 2 A003 01-50506-01 Module Board 4
C010 85-051002-0 PCB Spacer 3 A004 78-048004-0 Insulated Cushion 8
2esaBeludoM1-100760-07500A4recapS2-200150-96110C
1pmalCeniL0-200150-5721
0C
2knistaeH0-500150-07100P2pmalCrooDDVD0-200150-66310C
1rooDDVD1-100150-07410C
1tekcarBRI0-110150-5610P
F1redaoL00-63880-73510C
1DFV00-95555-3220PF41pmalCredaoL0-300150-96610C
C017 69-051004-0 Loader Clamp 2 2 FP03 75-051001-0 Display Bracket 1
C018 68-051003-0 Loader Cover 1
C019 83-043001-0 Foot Assembly 4
S001 61-023206-1 Self Taping Screw (BTB3X6) 7
2)iN-6X5.2BM(wercSenihcaM6-6
05220-16200S12aicsaF0-400150-07100F
(rehsaW0-503011-36300S1rosruCgniR0-200150-07200F ij3×ij7×0.5˅2
F003 76-051001-0 VFD window 1 S004 61-023616-0 Self Taping Screw (TBBT3×16) 2
F004 77-051001-1 Cursor Holder 1 S005 61-224512-1 Hex Head Screw (M4X12) 6
F005 87-048002-0 Input Button Pad 4 S006 61-224508-1 Hex Head Screw (M4X8) 7
F006 87-048003-0 Power Button Pad 2 S007 61-063106-0 Self Taping Screw (STF3X6) 4
F007 86-046001-0 Led Lens Gum 1 S008 61-023106-2 Self Taping Screw (STB3X6) 17
4)8X4BTS(
wercSgnipaTfleS1-801420-16900S1sneLdeL0-100800-67800F
F009 70-048013-0 Power Button 1 S010 61-373506-0 Machine Screw (MB3X6W.S-Ni) 11
F010 92-048001-0 Spring for Button 6 S011 61-023506-1 Machine Screw(MB3×6-Ni) 4
6)8X3BM(wercSenihcaM0-805320-16210S2nottuBtupn
I1-210840-07110F
F012 70-051006-1 Stop-Menu Button 2 S013 61-023106-1 Self Taping Screw (STB3X6-Ni) 6
2)3M(tuN2-203010-26410S1nottuBretnE0-700150-07310F
2)iN-4X3BM(wercSenihcaM1-405320-36
510S1PPF00-40555-10410F
4)8X3WPTS(wercSgnipaTfleS0-801380-16610S11aicsaF1-300160-07510F
F016 86-046002-0 Fascia Padding 2 S017 61-062206-1 Self Taping Screw (BTF2×6) 8
4)8×2FTS(wercS
gnipaTfleS1-801260-16810S1aicsafbuS1-100150-76710F
F018 86-010004-0 3mm Rubber Pad 3 S019 61-073108-0 Self Taping Screw (STO3X8) 2
S020 61-023208-0 Self Taping Screw (BTB3X8) 11
R001 67-051003-0 Rear Panel (C Version) 1 S021 61-246508-0 Machine Screw (MB6X8-Cr) 4
67-051005-0 Rear Panel (AH Version) 1
1telnICA20-20070-71200R
R003 11-01101-03 Rocker Switch 1
2-4

3.PACKING ACCESSORY SECTION
Shipping Box
Gift Box
Polyfoam(down)
Polyfoam(up)
AC Cord
Audio and Video Cord
REMOCON
Batteries
Accessory Box
2-5

SECTION 3 ELECTRICAL
CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power check flow……………………………………………………………………… 3-2
2. System operation flow…………………………………………………………………3-3
3. Test & debug flow……………………………………………………………………... 3-4,9
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGING
1. System 27MHz clock,reset,flash R/W signal………………………………………..3-10
2. SDRAM clock………………………………………………………………………….. 3-11
3. TRAY OPEN/CLOSE signal…………………………………………………………..3-11
4. SLED control related signal(NO disc control)……………………………………....3-12
5. LENS control related signal(NO disc control)……………………………………… 3-13
6. FOCUS control related signal(NO disc control)…………………………………… 3-14
7. SPINDLE control WAVEFORM……………………………………………………… 3-15
8. FOCUS ON WAVEFORM……………………………………………………………. 3-16
10. ES6168F Audio optical and coaxialoutput(SPDIF)………………………………. 3-17
11. ES6168F Video output to Audio DAC……………………………………….…….. 3-18
9. RF WAVEFORM…………………………………………………………….…………3-17
12. Audio output(1KHz odB)……………………………………………………….…… 3-18
BLOCK DIAGRAMS
1. Overall block diagram………………………………………………………………… 3-19
2. Power(SMPS) block diagram…………………………………………………………3-20
3. Servo block diagram………………………………………………………………….. 3-21
CIRCUIT DIAGRAMS
1. Power(SMPS) circuit diagram……………………………………………………….. 3-22
2. Decode board-ES6168 section……………………………………………………....3-23,24
4. Decode board-H-POWER & DRIVER section……………………………………...3-27
3. Decode board-DSP section………………………………………………………......3-25,26
5. Decode board-RF section……………………………………………………………. 3-28
6. Decode board-CONNECT AND 232 section…………………………………........ 3-29
7. Audio board…………………………………………………………………............... 3-30,31
8. 232 AND AMP module board………………………………………………………...3-32
9. Front panel board…………………………………………………………………….....3-33
CIRCUIT VOLTAGE CHARGE
………………………………….…………………........3-34,41
PRINT CIRCUIT BOARD DIAGRAM
1. Decode board………………………………………………………………….............3-42,43
2. Audio board………………………………………………………………………….....3-44,45
3. SMPS board………………………………………………………………………....... 3-46
4. Front panel board……………………………………………………………………...3-47,48
5. RS232 board……………………………………………………………………….......3-47,48
6. AMP module board…………………………………………………………………… 3-47,48
3-1

ELECTRICAL TROUBLESHOOTING GUIDE
No 5VS
No 5VD
Is 5VD section working?
Is 5VD present at input
of U911?
Replace U911.
Is there a DC voltage At
(+) terminal of B900?
Is there a AC voltage at
one terminal of RT900?
Replace U900.
Check FH900
1.Power check flow
No VF+
Is 5VD section working?
Replace D910
Check D910
NO
YES
YES
YES YES
YES
Replace RT900.
YES
Replace B900.
YES
No
A. B.
NO
NO
NO
NO
Digital circuit supply
No 5VA
Is VM works well
Check U658
Replace U658.
Check Transformer
No +/-12V
Is +/-VCCA works well?
Replace U605/U606
Check U605 U606
NO
YES YES
YES
A. B.
NO
NO
Is 5VD right
Yes
Check Q619 Q621 Q623
Yes
Analog circuit supply
3-2

2. System operation flow
Power On
1. ES6168 initializes SERVO & the other DSPs
Show LOGO
Tray Closed?
Tray Close to Closed position
NO
SLED at Inner
Side ?
SLED Moves to Inner Positi on
NO
YES
YES
Reci eve
OPEN/CLOSE
Key?
1. Execute Pressed Key & IR Key
2. System operation Routine Loop
NO
1. Stop Playback & Open Tray
2. Display tray open message & LOGO
Receive
CLOSE Key?
NO
YES
YES
1. Judge whether have disc and disc type
2. Jump to related disc reading procedure
3-3

3. Test & debug flow
Check the AC Voltage on
Power PCB (110V or 220V) NO Check Fuse and connections
to AC inlet
YES
Switch on the Power switch
Is the DC Voltage
outputs OK?
(5V,3.3V,9V,±12V,5VA)
Repair or Replace Power PCB
NO
YES
Is 3.3V,1.8V and 2V DC
outputs normal on decode
PCB?
Check the regulators or related diodes.
NO
YES
Insert the upgrade disc to update
the FLASH memory code.
Update FLASH
successfully?
A
YES
NO
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal LOE#,WRLL.
4. Check servo related circuit.
5. Check FLASH Memory related circuit.
Press the power key on front panel
Replace R-core Transformer
3-4

A
RESET or Power On.
NO NO
YES
NO
YES
NO
YES
YES
B
NO
NO
NO
YES
YES
NO
NO
YESYES
YES
Show LOGO? Flash Memory operates
properly?
Check connection lines between FLASH
& ES6168 and the FLASH access time
whether is suitable or not.
SDRAM works properly?
Check connection lines between
SDRAM & ES6168 and the SDRAM
is damaged.
ES6168
Video PINs outputs
properly?
Check the related ICs
Have TV signal output? Check the filtering circuit of
TV signal.
Check AV cable connection
to TV set.
Does Tray move
inside when it is not
at closed position?
Normal OPEN_SW&
CLOSE_SW signals?
Check the load OPEN & CLOSE
switch
Normal LDM1 &
LDM2 signal?
Normal EJ+ & EJ-
signal?
Check the cable connection
between decode PCB and loader.
Check the Tray control IO pins on
CXD1885 & FAN8042.
Check the Tray control amplifying
circuit on Motor driver.
3-5

B
ONON
NO
NO
ONON
NO
SEYSEY
YES
YES
YESYES
YES
Does
the SLED move
to inner side when it is at
outter position?
Motor Driver
XFTSMUTE
Pin is High?
Check the connection line of
XFTSMUTE signal.
Is SLED DC Level lower
than 1.65V?
Check the related circuit of
SLED.
SL+ and SL- output
properly?
Check the amp circuit on motor
driver.
Check the cable connection with
MECHA.
Do not put in disc and tray
close.
C
Optical Lens has
movements for searching
Focus?
Proper FSCON outputs
to motor driver?
Check FSCON connection on
CXD1885Q and motor dirver.
Proper F+ & F- outputs? Check the amp circuit on motor
dirver.
Check cable connect on with
pick-up head.
3-6

D
C
YES
NO
YES
YES
NO NO
Does spindle rotate? Proper SPWM signal on
CXD1885Q
Check SPWM related
circuit on CXD1885Q.
SP+ & SP- output
properly?
Check the spindle control
amp circuit of motor
driver.
Check the cable connection
between spindle and main PCBA.
YES
YES
NO NO
Laser turns on when
reading disc?
NO NO
YES
NO
YES
YES
NO
DVDLD or CDLD
output properly?
Check the laser power circuit
on CXD1881 and connecting to
power transistor.
Collector voltage of
power transistor is OK? Check the related circuit on
laser power transistor
Check cable connection between
transistor ouput and pick-up
head.
fforesaL?nicsidtuP
Disc ID is correct? Proper RFSIN signal
on CXD1881?
Check the related circuit
on CXD1881 RFSIN signal.
Check DVDLD & CDLD signal
YES
3-7

YES
NO
YES
YES
D
NO NO
NO
YES
NO
E
YES
Normal TEO Signal on
CXD1881 ?
Check the related
circuit on CXD1881
Track On OK?
Properly TSCON
signal on CXD1885Q?
T+ & T- output
properly?
Check the TSCON
connection on CXD1885Q
and motor dirver.
Check the tracking control
amp circuit on motor
driver.
Check cable connection on
pick-up head.
Disc is play ? Check RF-OP & RFAC signal waveform.
NO NO
YES
YES
YES
Focus ON OK? Proper signals on
A,B,C,D of CXD1881 Check connections between
CXD1881 and pick-up head.
Check FEO signal
on CXD1881
Check FSCON signal
on CXD1885Q
Check the FSCON connection on
CXD1885Q and motor driver.
YES
NO
3-8

Normal IR.VFD & Front
pannel key functions?
Communications between
IR.VFD Front pane llkey &
ES6168 is normally ?
Check communication lines on
ES6168.
NO
YES
Check the cable connection on
Front pannel.
TEST END
YES
Normal Audio output
when disc playback?
Audio DAC received
correct data stream?
Check connection between ES6168
& CXD2753 & Audio DAC.
Normal Audio DAC
out?
Check the related
circuit of Audio DAC.
Check Audio filter,amplify,mute
circuit.
NO NO
NO
YES
YES
YES
E
NO
3-9

DETAILS AND WAVEFORMS ON SYSTEM
TEST AND DEBUGGING
1.SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL.
1) ES6168F main clock is at 27MHz(pin49)
FIG 1-1
2) ES6168F( pin24) reset is low active.
Ch1 VCC
CH2 RESET
FI1-2
3-10