NAD L 70 User manual

NAD
SERVICE MANUAL
L 70
L 70
AV SURROUND
SOUND DVD RECEIVER
AV SURROUND SOUND DVD RECEIVER
DRAFT DATE: 20 Jan 2004

FRONT PANEL
Identification of controls
1 2
3
45678910 11 12
13141516171819
ATTENTION!
Please make all connections to your L70 receiver with the unit unplugged. (It is also advisable to power-down or unplug all associated components
while making or breaking any signal or AC power connections.)
ANTENNA
CAB/SAT
INPUT
VCR
IN
MONITOR
AUDIO
S-VIDEO
FM GND AM
OUTOUT OUTOUT
DIGITDIGITALAL OUTPUTOUTPUT
COMPONENTCOMPONENT
VIDEO OUTVIDEO OUT
Cr
Cb
Y
VIDEO
L
R
RL
RL
CENTER FRONTSURROUND
5.1 CHANNEL INPUT
CENTER
SURROUND
OSD SELECT
FRONT
SUBW
VIDEOS-VIDEO
SPEAKERS
AC OUTLET
SWITCHED
DIGITAL AUDIO
INPUT
COAXIAL OPTICAL OPTICAL
OUTPUTOUTPUT
SUB
WOOFER
PRE-OUT 12 V TRIGGER
OUT INPUT
SCARSCART/RGB OUTT/RGB OUT
240 VOLT EUROPEAN
VERSION ONLY
240 VOLT EUROPEAN
VERSION ONLY
120 VOLT
NORTH AMERICAN
VERSION ONLY
120 VOLT
NORTH AMERICAN
VERSION ONLY
POWER
© NAD 2002 L70
AC OUTLET
SWITCHED
100WATTS MAX
12 8
121164151413
753109
REAR PANEL
Identification of controls

1-3
SECTION 1
SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES.......................................................................................... 1-4
SERVICING PRECAUTIONS ....................................................................................................................... 1-5
* General Servicing Precautions
* Insulation checking prodedure
* Electrostatically Sensitive Devices
SPECIFICATIONS ......................................................................................................................................... 1-6
DISASSEMBLY .............................................................................................................................................. 1-7
PRINCIPAL PART LOCATION ...................................................................................................................... 1-8
RESET PROCEDURES ................................................................................................................................. 1-8
EXPLODED VIEW ............................................................................................................................. 1-9 ~ 1-10

1-4
PRODUCT SAFETY SERVICING GUIDELINES
CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN
ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS
WITHOUT MANUFACTURER’S APPROVAL. UNAUTHORIZED
MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT
MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING
PROPERTY DAMAGE 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 AC LINE SHOCK.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN
CORRECTED. A CHECK SHOULD BE MADE OF THE
FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN
SUCH A WAY 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 ALL LOOSE
FOREIGN PARTICLES.
4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR
DETERIORATION TO PARTS AND COMPONENTS. FOR
FRAYED LEADS, DAMAGED INSULATION (INCLUDING AC
CORD). AND REPLACE IF NECESSARY FOLLOW ORIGINAL
LAYOUT, LEAD LENGTH AND DRESS.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING
TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD
TENSION AROUND PROTRUDING 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 UNRECOMMENDED CIRCUIT
MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN
AC 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 SAFET TO OPERATE WITHOUT DANGER OF ELECTRICAL
SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER
DURING THIS TEST USE AN AC 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, 150V AC TYPE
CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND
(WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED
METALLIC PARTS, ONE AT A TIME.
MEASURE THE AC VOLTAGE ACROSS THE COMBINATION
OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR.
REVERSE THE AC PLUG AND REPEAT AC VOLTAGE
MEASUREMENTS FOR EACH EXPOSED METALLIC PART.
VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S.
THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE
EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.
SUBJECT : GRAPHIC SYMBOLS
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 A FACTOR, ETC.
3. AVOID PLACEMENT 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
COMMERCAL 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 AGAINST THE 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 ROLL A 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 THAT A FOREST OF EXTENSIONS
SPROUTING FROM A SINGLE OUTLET CAN LEAD TO
DISASTROUS CONSEQUENCES TO HOME AND FAMILY.
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN
EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE
PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” WITHIN THE
PRODUCT’S ENCLOSURE 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 USER TO THE PRESENCE OF IMPORTANT
OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE
LITERATURE ACCOMPANYING THE APPLIANCE.

1-5
SERVICING PRECAUTIONS
CAUTION : Before servicing the A/V Receiver 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 A/V Receiver 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 substitution or incorrect polarity installation
of electrolytic capacitors may result in an explosion hazard.
2. Do not spray chemicals on or near this A/V Receiver 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 A/V Receiver 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 1M-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 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 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. lmmediately 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.)
9. Resetting the L70 is by pressing three front panel keys; PLAY, then
STOP, then separately hold the AM/FM key for more than 5 sec.
The L70 will switch off.

1-6
SPECIFICATIONS
Amplifier Section
Output Power (Front) :
F.T.C Rating:
60 watts RMS per channel minimum, both channels
driven into 8 ohms from 20 Hz to 20kHz with no
more than 0.09% total harmonic distortion
Surround Output Power (0.5% THD, 1 kHz, 8 ohms) :
50 + 50 Watt (Front)
50 Watt (Center)
50 + 50 Watt (Rear)
Total Harmonic Distortion (Front) :
0.05 % (at 30 watts, 1 kHz)
Delay Time :
DOLBY DIGITAL : REAR : 0 - 15 ms
CENTER : 0 - 5 ms
DOLBY PRO LOGIC : REAR : 15 - 30 ms
Audio Input Sensitivity/Impedance :
*LINE : 320 mV/47 k ohms
Output Level / Impedance :
VCR REC : 300 mV/2.2 k ohms
Frequency Response :
*LINE : 10 Hz - 60 kHz, +1/ -3 dB
Signal-to-Noise Ratio : 1 Watt
*LINE : 70 dB (IHF-A)
Tone Control :
BASS : ±10 dB at 100 Hz
TREBLE : ±10 dB at 10 kHz
Digital Audio Section
Sampling Frequency :
32 kHz, 44.1 kHz, 48 kHz, 96 kHz
DIGITAL Input Level/Impedance
COAXIAL : 0.5 Vp-p/75 ohms
OPTICAL : -15 dBm ~ -21 dBm
Video Section
Input Sensitivity /Impedance : 1.0 Vp-p/75 ohms
Output Level /Impedance : 1.0 Vp-p/75 ohms
*LINE means CABLE/SAT, VCR, VIDEO4
Improvements may result in specifications and features
changing without notice.
lllustrations may differ slightly from production models.
FM Tuner Section
(Without notes 100.1 MHz, 65 dBf)
Tuning Range :
87.5 MHz - 108.0 MHz C: 50 kHz steps
AH: 100 kHz steps
AM Suppression Ratio: C: 50 dB
AH: 60 dB
Total Harmonic Distortion (1 kHz) :
Mono : 0.4%
Stereo : 0.5%
Frequency Respones : 20 Hz - 15 kHz, +1/ -1. 5 dB
Stereo Separation (1 kHz) : C: 40 dB
AH: 35 dB
Signal-to-Noise Ratio :
Mono : 70 dB
Stereo : 65 dB
AM Tuner Section
Tuning Range:
C : 522 kHz - 1,620 kHz (9 kHz steps)
AH : 520 kHz - 1,710 kHz (10 kHz steps)
Usable Sensitivity : 55 dB/m
Total Harmonic Distortion : 0.1% at 85 dB/m
Signal-to-Noise Ratio : 40 dB at 85 dB/m
General
Power Requirements :
C : 230V AC, 50Hz
AH : 120V AC, 60Hz
Power Consumption : C: 1.3A
AH: 2.5A
AC Outlets : unswitched x 1, Total 100 W max. (1A)
Dimensions (W x H x D) : 435 x 133 x 375
Weight (net) : 16.3 kg

1-7
DISASSEMBLY
1> REMOVAL OF TOP COVER
2> REMOVAL OF FRONT PANEL

1-8
PRINCIPAL PARTS LOCATION
RESET PROCEDURE FOR Receiver Functions Only:
Press Play then Stop then the FM/AM key, holding in the FM/AM key for more
than 5 seconds.
RESET PROCEDURE FOR DVD-Player Functions Only:
Select DEFAULTS to restore factory defaults.
The factory default password is 1234.

1-9 1-10
EXPLODED VIEW C
20S C R E WS 19 CT B 3+6F
1
1
C UP 11 554 -2
C UP 11 445
HJ DR L -A7 00H D3
C UP 11 554 -1
C UP 11 553 -1
C UP 11 555
C UP 11 556 -1
HDM K D1 206 P T S 3
C LT 5 V 03 1Z U( ZE )
C UP 11 553 -2
C UP 11 553 -5
C UP 11 553 -4
S 17
S 18
1
3
S C R E W
S C R E W
S 11
S 10 C T B 3+16 J
C T B 3+20 J
4SC R E W
S 16
KH D1 A0 16
15
15
5
26
2MOU NT , PC BC MH1 A11 9
13
4
6
2SC R E WC TW 3+1 2J
S 15
S 13
S 14
S C R E W
C T B 3+6J
6
S C R E W
S 3
C T B 3+8J F C
S 12
S C R E WC T S 3+8J
S C R E WC T W3 +20J
C KC 1 A13 5S 3 5
DV D P C B ASS 'Y 1
31
4
15
2
S C R E W
S C R E W
S C R E W
S C R E W
S C R E W
S C R E W
S C R E W
S C R E W , TR
S C R E W , F A N
S CR E W , TR A NS 4
DE S C R IP T IO N Q'T Y
S 7
S 6
S 9
S 8
S 1
S 4
S 2
S 5
NO .
C T B 3+8J
P AR TS NO .
C T W3 +16J
C T W3 +8J
C TB 4+6F F C
C T B 3+8G F Z
C T B 3+10 G
C T B 3+8J F Z
KH D1 A0 23
KH D1 A0 12
KH D1 A0 36
1
1
1
33
34
32
35
CPU BOARD (receiver CPU)
MAIN P C B AS S 'Y (DVD)
VI DE O P CB A S S 'Y
1
1
2
1
1
2
3
4
2
2
ME C HAN IS M A S S 'Y
P OW E R P C B AS S 'Y
FA N
C US HIO N , F O O T
HO LD E R , P C B
HO LD E R , P C B
BR AC KE T , HE AT S I NK
HE A T S I NK
AMP P C B AS S 'Y
S UP P O R T , ME C HA
29
30
26
27
28
C HG 1A 171
24
25
21
22
23
KH E 1 70
KH E 1 A0 30
C MD1A 479
C MY 1A 197
C MH1 A18 9
1
4
1
1
1
1
1
1
0.1 7
1
C HAS S IS , B O TT OM
KN O B , P OW E R
P HO NE J AC K P C B A S S 'Y
FR O NT P C B A S S 'Y
P ANE L, S U B
P OW E R T R AN S
FO O T
VI DEO J AC K PC B AS S'Y
C AB I NE T, T O P
IND IC A T O R , P O W E R
5
1
1
2
1
1
1
1
1
P ANE L, A L
KN O B , E NT E R
WI ND OW , F IP
C OV E R , J A C K
OR NA ME N T , DO O R
BA R , S I DE
KN O B , D IS P LA Y
VO LU ME K NO B AS S 'Y
R OT AR Y K N OB AS S 'Y
WI NDO W, S E NS O R 1
19
20
16
17
18
C G L1 A18 8
13
14
15
11
12
8
9
6
7
3
4
1
2
5
10
C G R 1A 28 8M7K 1 02
C G U1A 24 4A8
KK M 2A0 62C 37
C B T1 A7 45M 7K 10 2
C B T1 A8 53M 7K 10 2
C G U1A 24 5A1 0
C B T1 A7 46M 7K 10 2
C G W1 A3 51M7 K 102
C UA1 A22 3
C G R 1A 28 7M7Z K 10 2
KG K 1 A0 63Y A
KG K 1 A0 81Z A
KK M 1A1 30Z C 37
C K L1 A06 0
NO . P AR TS NO . DE S C R IP T IO N Q'T Y
41
41
S 17
S 6
S 9
S 12
X2
S 5
X8
S 6
S 13
X3
S 6
39
22
24
(C N V K S T M B 01 4MA 18 )
(K K M1A 13 0Y C 37 )
S 5
C UP 11 556 -2
C UP 11 556 -3
C NV MB 001M A0 9D S
C MX1 A14 0
C MX1 A13 9
1B AR R I E R
1
1S U B T R AN S A S S 'Y
1IN S U L AT O R
1F AN , BRACKET, 2x resistors
45
44
46
42 COP11555 L70 PCB AMP ASSEMBLY
43
41 HDMKD1245PFS2
KH R 1 A0 28
1
1
2
1
1C K F 1A2 44Z
38
39
37
36
40
TU N E R P AC K
P ANE L, R E AR
P C B AS S 'Y
BU S H IN G , AC C O R D
X2
29
S 10
S 11
S 10
S 15
X2
X4
S 10
X6
S 15
X9
37
S 6 X 3
S 6 X 2
X4
S 1
X2
S 1
X4
38
S 5
S 1
28
26
27
S 14
25 26
28
29
(C K F 2A 244 Y )
38
X2
S 9
36
35
S 2 X 3
34
42
40
COP1155B & COP1155C CUP11554-1 & CUP11554-2
S9
45
44
43
S9 X2
X5
S2
S18
S2
S9 X4
S1
S1
S7
S3 X4
X2
S8
X4
S1
X6
S4
S7
23
22
S16 X4
21 X4
X4
20
X4
X2
S18 X2
S19 X20
S7 X4 X4
S7
13
12
11
17
19
18
31
30
16
14
15
8
8
9
10
7
7
6
5
4
3
2
X8
S7
1
S7
X4
X4
S 7
33
32
(L70AH)

2-11
SECTION 2
ELECTRICAL CONTENTS
CONTENTS
IC BLOCK DIAGRAMS & PIN DESCRIPTION ............................................................................. 2-12 ~ 2-34
DIAGRAMS ................................................................................................................................................ 2-35
1. BLOCK DIAGRAM ................................................................................................................................ 2-35
2. WIRING DIAGRAM .............................................................................................................................. 2-37
3. SCHEMATIC DIAGRAM ...................................................................................................................... 2-39
FRONT & µ-COM PART.............................................................................................................2-39
INPUT & VOLUME PART...........................................................................................................2-41
DSP & CODEC PART ................................................................................................................2-43
VIDEO PART ..............................................................................................................................2-45
AMP PART..................................................................................................................................2-47
POWER PART............................................................................................................................2-49
DVD BACK-END PART..............................................................................................................2-51
4. PRINTED CIRCUIT BOARDS ............................................................................................................. 2-53
FRONT & µ-COM PART ............................................................................................................2-53
INPUT, VOLUME, DSP, CODEC & VIDEO PART....................................................................2-55
AMP PART..................................................................................................................................2-57
POWER PART............................................................................................................................2-59
DVD BACK-END PART..............................................................................................................2-61

2-12
PIN No. SYMBOL I/O DESCRIPTION
1OSD_H I OSD INPUT SENSING PORT
2REMOTE I REMOTE CONTROL DATA INPUT PORT
3RDS_CK O CLK/DATA PORT FOR RDS IC(SA6579TV1)
4 RDS_DA I
5F_MUTE O FUNCTION MUTE CONTROL OUTPUT PORT("H")
6EVOL_DA O DATA / CLK / CHIP ENABLE CONTROL PORT FOR ELECTRONIC VOL. IC(M62446AFP)
7EVOL_CK O
8EVOL_CE O
9TEST - PROGRAM SUPPLY VOLTAGE(GND CONNECTION)
10 FUNC_A I FUNCTION SELECTOR (ENCODER) CONTROL PORT
11 FUNC_B I
12 RESET RESET INPUT PORT("L")
13 X-IN I 8MHz CRYSTAL CONNECTOR PORT
14 X-OUT O
15 VSS(GND) DEVICE GND PORT
16 BACKUP I BACKUP MODE CONTROL PORT("L")
17 MREQ DVD INTERFACE
18 FREQ DVD INTERFACE
19 SCKO DVD INTERFACE
20 DVD_IN DVD INTERFACE
21 DVD_OUT DVD INTERFACE
22 CLK1 O CLK OUTPUT PORT FOR AK4586, CS49326, LC7476 & NJU3713
23 CS_CE O CHIP ENABLE PORT FOR CS49326
24 DATA1 O DATA OUTPUT PORT FOR AK4586, CS49326, LC74763 & NJM3713
25 AK_CE O CHIP ENABLE PORT FOR AK4586
26 OSD_CE O CHIP ENABLE PORT FOR OSD IC(LC74763)
27 POWER O POWER ON CONTROL PORT("H")
28 PLL_DIN I PLL DATA INPUT PORT
29 FUNC_CE O CHIP ENABLE PORT FOR FUNCTION IC(TC9163/9164)
30 CLK2 O CLK OUTPUT PORT FOR PLL & FUNCTION IC
31 DATA2 O DATA OUTPUT PORT FOR PLL & FUNCTION IC
32 PLL_CE O PLL CHIP ENABLE PORT
33 +5V I POWER SUPPLY PORT
34~44 VFL GRID O VFL GRID CONTROL PORT
45~61 VFL SEGMENT O VFL SEGMENT CONTROL PORT
62~65 OPTION/VFL SEG. O OPTION CONTROL / VFL SEGMENT CONTROL PORT
66 -VKK I VFL POWER SUPPLY PORT(-30V)
67 OPTION I OPTION CONTROL PORT
68 H/P_IN I HEADPHONE IN/OUT SENSING PORT
69 PROTECT I PROTECT INPUT PORT("L")
70 STEREO I TUNER STEREO SENSING PORT
71 TUNED I TUNER TUNED SENSING PORT
72 VOL_B I MASTER VOLUME UP/DOWN CONTROL PORT
73 VOL_A I
74 CS_INTREQ I INTERRUPT REQUEST INPUT PORT FROM CS49326
75 CS/AK_DOUT I DATA INPUT PORT FROM AK4586 & CS49326
76~78 KEY_IN I KEY CONTROL INPUT PORT
79 CS_RST O RESET OUTPUT PORT FOR CS493263
80 EXP_CE O CHIP ENABLE PORT FOR NJU3713
IC PIN FUNCTION (IC81 : TMP87PS71AF(OTP)-ANAM 1359DAT(MICOM)

2-13
u-COM IC PIN ASSIGNMENT & BLOCK DIAGRAM
PIN ASSIGNMENTS
(TOP VIEW)
P96 (S14) P95 (S13) P94 (S12) P93 (S11) P92 (S10) P91 (S9) P90 (S8) P87 (S7) P86 (S6) P85 (S5) P84 (S4) P83 (S3) P82 (S2) P81 (S1) P80 (S0) P77 (G0) P76 (G1) P75 (G2) P74 (G3)
(SIS) P97
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55565758596061626364 54 53 52 51 50 49 48 47 46 45 44 43 42 41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
VKK
(KEY0) P40
(KEY1) P41
(KEY2) P42
(KEY3) P43
(KEY4) P44
(KEY5) P45
(CIN5/KEY6) P46
(CIN4/KEY7) P47
(CIN3) P50
(CIN2) P51
(CIN1) P52
(CIN0) P53
P54
(PWM/PDO) P55
P73 (G4) P72 (G5) P71 (G6) P70 (G7) P67 (G8)
(INT0) P10
(INT1) P11
(INT2/TC1) P12
(DVO) P13
P14
(TC2) P15
P16 P17
TEST
(XTIN) P21 (XTIN) P22
RESET
XIN
XOUT
VSS
(INTS/STOP) P20
(INT3/TC3) P30
(TC4) P31
(SCK) P32
(SI) P33
(SO) P34
(HSCK) P35
P36
(HSO) P37
P66 (G9)
P65 (G10)
P64 (G11)
P63 (G12)
P62 (G13)
P61 (G14)
P60 (G15)
VDD
P07
P06
P05
P04
P03
P02
P01
P00
BLOCK DIAGRAM
VDD P9
VFT drive circuit (automatic display) Key scan
control
Program counter
Register banks
Stack PointerP S W
Interrupt Controller
System Controller
Standby Controller
Timing Generator
High
frequ.
Low
frequ.
Clock
Generator
Time Base
Timer
16-bit
Timer/Counters
TC1 TC2 TC3 TC4 SIO HSO
8-bit
Timer/Counters
Serial
Interfaces
6-bit A/D
Converter
P4
P47
to
P40
P5
P55
to
P50
P3
P37
to
P30
P1
P17
to
P10
P0
P07
to
P00
P2
P22
to
P20
Inst.
Register
Inst.
Decoder
Watchdog
Timer
Flags
ALU RBS
Program Memory
(ROM)
Data Memory
(RAM)
I/O Ports
P97
to
P90
P8
Output Ports
P87
to
P80
P7
I/O Ports
P77
to
P70
P6
P67
to
P60
Power Supply
VFT Power
Supply
Reset I/O
Test Pin
Resonator
connecting
Pins
VSS
VKK
RESET
TEST
XIN
XOUT
I/O Ports

2-14
CMPDAT
SDATAN2
CMPCLK
SCLKN2
CMPREQ
LRCLKN2
SCLKN1
STCCLK2
LRCLKN1
SDATAN1
CLKIN
CLKSEL
FILTD FILTS VA AGND DGND(3:1) VD(3:1)
XMT95
AUDA
LRCLK
SCLK
MCLK
DC
DD
EXTMEM.
GPIO8
A800T
INTERQ
A1,
SCDIN
A0,
SCCLK
CS
STC
Parallel or Serial Host Interface
RESET
SCDIO,
SCDOUT,
PSEL,
GPIO9
WR,
DR,
EMWR,
GPIO10
RD,
R/W,
EMOE,
GPIO11
DATA7:0,
EMAD7:0,
GPIO7:0
Compressed
Data Input
Interface
RAM
Program
Memory
ROM
Program
Memory
RAM
Data
Memory RAM
Output
Buffer
Output
Formatter
ROM
Data
Memory
PLL
Clock Manager
RAM Input
Buffer
24-Bit
DSP Processing
Digital
Audio
Input
Interface
Framer
Shifter
Input
Buffer
Controller
PIN ASSIGNMENT.(IC41: CS493264)
(TOP VIEW)
BlOCK DIAGRAM(IC41: CS493264)
VD1
DGND1
AUDATA3, XMT958
WR,DS,EMWR,GPIO10
RD,R/W,EMOE,GPIO11
A1,SCDIN
A0,SCCLK
DATA7,EMAD7,GPIO7
CS493XX-CL
44-pin PLCC
Top View
DATA6,EMAD6,GPIO6
DATA5,EMAD5,GPIO5
DATA4,EMAD4,GPIO4
DATA3,EMAD3,GPIO3
DATA2,EMAD2,GPIO2
DATA1,EMAD1,GPIO1
DATA0,EMAD0,GPIO0
VD2
DGND2
CS
SCDIO,SCDOUT,PSEL,GPIO9
ABOOT,INTREQ
EXTMEM,GPIO8
SDATAN1
MCLK
SCLK
LRCLK
AUDATA0
AUDATA1
AUDATA2
DC
7
8
9
10
11
12
13
14
15
16
1718 19 20 21 22 23 24 25 26 27 28
6543214443 42 41 40
39
38
37
36
35
34
33
32
31
30
29
DD
RESET
AGND
FILT2
CLKSEL
CLKIN
CMPREQ,LRCLKN2
VA
FILT1
CMPDAT,SCLKN2,RCV958
CMPCLK,SCLKN2
LRCLKN1
VD3
SCLKN1,STCCLK2
DGND3

2-15
PIN No. Pin Name I/O Function
1,12,23 +VD1 - Digital Power supply. Normally +2.5v
2,13,24 DGND - Digital Ground
3AUD3 O SPDIF transmitter output/Digital audio output(N.C)
4WRIHost write strobe pin(connected to GND with an external resistor)
5RDIHost parallel output enable pin(pulled up with an external resistor)
6CS_DA I SPI Serial data input pin
7CS_CK I Serial control clock input pin
8EMAD7 I/O
9EMAD6 I/O
10 EMAD5 I/O
11 EMAD4 I/O Serial data IN/OUTPUT pins(pulled up with an external resistor)
14 EMAD3 I/O
15 EMAD2 I/O
16 EMAD1 I/O
17 EMAD0 I/O
18 CS_CE I Host parallel chip select pin
19 SCDIO(AK_DOUT) O Serial control port data ouput pin
20 INTREQ O Control port interrupt request output pin
21 EXTMEM I/O External Memory Chip Selector(pulled up with an external resistor)
22 SDATAN1(SDI) I PCM audio data input number 1 pin
25 SCLKN1(BICK) I PCM audio input bit clock pin
26 LRCLKN1(LRCK) I PCM audio input sample rate clock pin
27 CMPDAT(SDI) I PCM audio data input number 2 pin
28 CMPCLK(BICK) I PCM audio input bit clock pin
29 CREQ(LRCK) I PCM audio input sample rate clock pin
30 CLKIN(XIN) I Master clock input(used external clock)
31 CLKSEL(GND) I DSP clock mode select pin: connect the GND
32 FILT1 Connects to an external filter for the on-chip phase-locked loop
33 FILT1 Connects to an external filter for the on-chip phase-locked loop
34 +2.5V - Analog Power supply for clock generator . Normally +2.5V
35 AGND - Analog ground supply for clock generator PLL.
36 RESET(CS_RST) I Master reset input pin
37 DBDATA - Reserved pin and should be pulled up with an external resistor.
38 DBCLK - Reserved pin and should be pulled up with an external resistor.
39 AUD2(SDO2) O PCM multi-format digital-audio data ouput2 pin
40 AUD1(SDO1) O PCM multi-format digital-audio data ouput1 pin
41 AUD0(SDO0) O PCM multi-format digital-audio data ouput0 pin
42 LRCLK I Audio output sample rate clock pin
43 SCLK(BICK) I Audio ouput bit clock pin
44 MCLK I Audio master clock output pin
AUDIO DSP(CS49326 : IC41)

2-16
P5
P6
P7
P8
Vss
P9
P10
P11
P12
VDD
P4
P3
P2
P1
CLR
STB
CLK
DATA
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
Shift Circuit
Latch Circuit
Controller Circuit
P1
P2
P3
P4
P5
P11
P12
CLK
DATA
10
11
12
13
14
15
16
17
1
8
9
STB
CLR
NJU3713
(IC28 : EXPANDER / MAIN)
BLOCK DIAGRAM

2-17
BLOCK DIAGRAM (IC42: AK4586)
PIN ASSIGNMENT (IC42: AK4586)
ADC
LIN HPF
ADC
RIN HPF
DAC DATTLPF
LOUT1
DAC DATTLPF
ROUT1
DAC DATTLPF
LOUT2
DAC DATTLPF
ROUT2
DAC DATTLPF
LOUT3
DAC DATTLPF
ROUT3
Audio
I/F
Input
Selector
Clock
Recovery
Clock
Generator
X’tal
Oscillator
µP I/F
XTI
XTO
MCKO
TX
RX1
RX2
RX3
RX4
SDTO
BICK
LRCK
SDTI1
SDTI2
SDTI3
CSN CCLK CDTI CDTO
MCLK
BICK
SDOUT
LRCK
SDIN1
SDIN2
SDIN3
DAIF
Decoder
DEM
XTO
PDN
1
XTI/EXTCLK
44
2
DVDD 3
DVSS 4
TVDD 5
TX 6
MCKO 7
LRCK 8
BICK 9
SDTO 10
SDTI1 11
RX1
43
I2C
42
41 40
RX3
39
SLAVE
38
RX4
3
7
PVSS
36
R
35
PVDD
34
SDTI2 12 SDTI3
13
INT0 14 INT1 15 CAD1/CDTO 16
17
SCL/CCLK 18 CAD0/CSN 19 DZF2/OVF 20 AVSS 21 AVDD 22
33
32
31
30
29
28
27
26
25
24
23
RIN
LIN
ROUT1
LOUT1
ROUT2
LOUT2
ROUT3
LOUT3
DZF1
VCOM
VREFH
AK4586VQ
Top View
SDA/CDTI
RX2
TST

2-18
PIN/FUNCTION (IC42: AK4586)

2-19
S5
S1
S2
6.2dB
Amp 75
dirver
6.2dB
Amp
6.2dB
Amp
S4
S3
S6
S7
20K
20K
20K
13
Vin1
V+
V-
SW2 SW1
Vout1
Vout2
Vout3
SW4
BLOCK DIAGAM (NJM2296M /MAIN IC96)
SW3 GND
SW5
Vin2
Vin3
Vin4
Vin5
1
15
11
16 10 14
12
2
9
7
5
46 8
3
20K
20K
20K
20K
20K
75
dirver
75
dirver
1
2
3
4
8PIN FUNCITON
1. A OUTPUT
2. A-INPUT
3. A+INPUT
4. V
5. B+INPUT
6. B-INPUT
7. B OUTPUT
8. V
A
B
7
6
5
•
OPA2134UA / NJM 2068MD (OP AMP / IC16~21, IC45~53)
NJM2296M (VIDEO SW / IC51, 52, 53)

2-20
LEVEL SHIFTER
2
1
2
3
4
1
5
6
2
8
4
1
2
3
4
6
8
4
1
3
4
5
6
7
8
9
10
14 28
11
12
13
27
26
25
24
23
22
21
20
19
18
17
16
15
LATCH CIRCUIT
SHIFT REGISTER
LEVEL SHIFTER
LATCH CIRCUIT
L-S R-S
Vss GND VDD
L-S
L-S
L-S
L-S
L-COM
L-S
L-COM
L-S
7
L-S
L-COM
ST
R-S
R-S
R-S
5
R-S
1
R-COM
R-S
2
R-COM
R-S
R-COM
DATA
CK
7
R-S
TC9164AF (FUNCTION IC11)
BLOCK DIAGRAM
TC9162AF (FUNCTION IC12)
BLOCK DIAGRAM

2-21
M62446FP (ELECTRONIC VOLUME/INPUT : IC13)
SYSTEM BLOCK DIAGRAM
PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM
C in Cout
SWout
SLout
SRout
Lout
LATCH DATA CLK
µ-com
interface
Rout
SW in
SL in
SR in
BYPASS1
BYPASS2
L in
R in
volume
volume
tone
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
OUT4
volume
MCU I/F
OUTPUT
PORT
OUT3
OUT2
OUT1
AVDD
SWin
GNDS
SRin
SLin
GNDC
Cin
GNDR
Rin
GNDL
Lin
BYPASSR
BYPASSL
LTRE
LBASS3
LBASS2
LBASS1
DVDD
CLK
DATA
LATCH
DGND
AGND
SWout
SRout
SLout
Cout
Rout
Lout
AVss
CL1
CL2
CR1
CR2
RTRE
RBASS3
RBASS2
RBASS1
34
35
36
37
38
39
40
41
42
33
32
31
30
29
28
27
26
25
24
23
22
volume
volume
volume
tone tone
volume
volume