NAD Surround Sound Preamp Processor S 170i User manual

SERVICE MANUAL
S170i
S170i
A/V SURROUND
SOUND
PREAMPLIFIER
A/V SURROUND
SOUND
PREAMPLIFIER

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.

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.)

CONTENTS
FRONT PANEL / REAR PANEL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-25
ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-35
EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
SERVICE SAFETY PRECAUTIONS
1. Replacing the Fuses
CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY
WITH SAME TYPE OF FUSE.
REFERENCENO. PARTNUMBER DESCRIPTION
FUSE1*C 1.6A 250V Time Lag
FUSE2*C 1A 250V Time Lag
FUSE3*C 2A 250V Time Lag
NOTE:
*C : European version only
2. Safety-check out
Before returning the product to the customer, make leakage current or resistance measurements
to determine that exposed parts are acceptably insulated from the supply circuit.
Parts marked with the symbol are critical with regard to the risk of fire and electric shock.
Replace only with parts recommended by the manufacturer.
5120-0050-0
5100-1020-1B
5120-0065-0
!
!
!
!

18
14
13
10
15 16
1
356
489
1
2
3
4
5
6
4 OUT
5 OUT
6 OUT
MON OUT
VIDEO 1 VIDEO 2 VIDEO 3 VIDEO 4 VIDEO 5 VIDEO 6
AUDIO INPUT
CD AUX TUNER
MULTI
SOURCE
OUT
TAPE MONITOR
LL
IN
IN IN
OUT
OUT OUT
EXTERNAL 7.1 OUTPUTS EXTERNAL 5.1 INPUTS
12V TRIGGERS OUT
RS 232
DIGITAL 4
DIG OUTDIGITAL 1
DIGITAL 2 DIGITAL 3
COMPONENT VIDEO
Cb Cr
LEFT B (mono)LS LS
Y
NAD LINK
OUT
OPTICAL IN 1 OPTICAL IN 2 OPTICAL OUT
CENTER CENTERFRONT L FRONT L
ININ
S VIDEO 4 IN S VIDEO 6 IN S VID 5 OUT MONITOR OUT S VIDEO 2 IN
S VIDEO 5 IN
S VID 4 OUT S VID 6 OUT
S VID 3 IN
S VID 1 IN
VIDEO 4 VIDEO 5 VIDEO 6 AC MAINS INPUT
VIDEO INPUT
LL
RR
R
PLAY RECORD RIGHT B
RS RS
FRONT R FRONT R SUB SUB
AUDIO OUT 13
2
2
7
17
11 12
1317
14
11 12
A/V Surround Sound Preamplifier S170i
NA D
TONE
MULTI SOURCE BRIGHTNESSLEVELSTAPE MONITOR
2 3 4 85 96 10
AUDIO MODESPEAKERS DELAYVIDEO
VOLUME (SET UP)VOLUME (SET UP)
The graphic symbol of a lightning flash with an arrow point
within a triangle signifies that there is dangerous voltage
within the unit and it posses a hazard to anyone removing
the cover to gain access to the interior of the unit. Only
qualified service personnel should make such attempt.
The graphic symbol of an exclamation point within
an equilateral triangle warns a user of the device
that it is necessary to refer to the instruction
manual and its warnings for proper operation of
the unit.
1. POWER SWITCH 6. MULTI SOURCE 11. TONE
2. POWER INDICATOR 7. SPEAKERS 12. MODE
3. AUDIO INPUT SELECTOR 8. DELAY 13. VOLUME/SETUP CONTROL
4. VIDEO INPUT SELECTOR 9. LEVELS 14. DISPLAY
5. TAPE MONITOR 10. BRIGHTNESS
1. VIDEO INPUTS 7. COAXIAL DIGITAL INPUTS/OUTPUT 13. TAPE INPUT/OUTPUT
2. VIDEO OUTPUTS 8. OPTICAL DIGITAL INPUTS/OUTPUT 14. MULTI SOURCE OUTPUT
3. S-VIDEO INPUTS 9. RS-232 15. EXT. 7.1 OUTPUTS
4. S-VIDEO OUTPUTS 10. AUDIO INPUTS 16. EXT. 5.1 INPUTS
5. COMPONENT VIDEO INPUTS/OUTPUTS 11. AUDIO OUTPUTS 17. 12V TRIGGET OUTPUTS
6. NAD LINK INPUT/OUTPUT 12. CD/AUX/TUNER INPUTS 18. AC INLET
REAR PANEL CONNECTIONS
FRONT PANEL CONTROLS

N
LE
VIDEO BOARD
MAIN BOARD
DECODER BOARD
VFL
ENCODER
FRONT PANEL BOARD
SWITCHING
POWER SUPPLY
POWER SWITCH BOARD
AC INLET
CHASSIS
A
B
C
+15V
AGND
-15V
+5VD
DGND
+15V
GND
-15V
+5VD
EARTH NEUTRAL
LIVE
X26
1
X27
X24
1X19
1
1
1
1
X30
1
X16 1
X14 11
X11
X13
S-3
1
CN1
S-1
S-2
1
P2A
P1A
WIRING DIAGRAM
BNC CONNECTOR
BROWN
BROWN
BLUE
YEL-GRN
YEL-GRN
GRAY
GREEN
YELLOW
GREEN
RED
RED
BLACK
20-PIN RIBBON
8-PIN RIBBON
20-PIN RIBBON
20-PIN RIBBON
GEN6 A367

SPECIFICATIONS
STANDARD SETTINGS SURROUND BACK LEFT & RIGHT
1. Volume = 0dB 1. Dolby 1.0 test disc (5.1 input)
2. Tone Controls = 0dB 2. Choose titles with SL and SR signals
3. LFE Channel = 0dB 3. Put unit to 6.1 mode setting
4. Bass Limiter = Off
5. Channel Levels = 0dB
6. Delays = 0 meters/ft
7. Speakers = Large
8. Subwoofer = Yes
DOLBY DIGITAL MODE: Dolb
y
test disc 1.0
1. Output level All 7 Title 30 997Hz 0.22 ± 0.03 V
2. Channel Difference All 5 Tilte 30 997Hz 0 ± 0.5 dB
L Title 43 200Hz-20kHz 0 ± 0.2 dB
R Title 45 200Hz-20kHz 0 ± 0.2 dB
C Title 44 200Hz-20kHz 0 ± 0.2 dB
SL Title 46 200Hz-20kHz 0 ± 0.2 dB
SR Title 47 200Hz-20kHz 0 ± 0.2 dB
Sub Title 48 20Hz-80Hz 0 ± 0.2 dB
L Title 65 997Hz ≤0.01%
R Title 67 997Hz ≤0.01%
C Title 66 997Hz ≤0.01%
SL Title 68 997Hz ≤0.01%
SR Title 69 997Hz ≤0.01%
Sub Title 70 30Hz ≤0.03%
5. S/N Ratio, A-wtd
20kHz LPF
All 5 Title 63 ≥65dB
6. Channel Separation
20kHz LPF
All 5 Title 65-69 997Hz ≥65dB
DTS MODE: DTS Consumer Product Evaluation Test Disc
All 5 Track 21 1kHz 0.22 ± 0.03 V
Sub Track 15 30Hz +9.4 ± 1 dB
2. Channel Difference All 5 Track 21 1kHz 0 ± 0.5 dB
L Track 26 20Hz-20kHz 0 ± 0.2 dB
R Track 27 20Hz-20kHz 0 ± 0.2 dB
C Track 30 20Hz-20kHz 0 ± 0.5 dB
SL Track 28 20Hz-20kHz 0 ± 0.5 dB
SR Track 29 20Hz-20kHz 0 ± 0.5 dB
L Track 10 1kHz ≤0.01%
3. Frequency Response
Title 30 for reference. For Sub,
reference is start of title 48
4. THD
With audio BPF
4. THD
1. Output level
For Sub, ref. L out at track 10
3. Frequency Response
Track 21 for reference

R Track 11 1kHz ≤0.01%
C Track 14 1kHz ≤0.01%
SL Track 12 1kHz ≤0.01%
SR Track 13 1kHz ≤0.01%
DOLBY PROLOGIC MODE: Analo
g
input si
g
nal = 2V
L L 1kHz ≤0.05%
R R 1kHz ≤0.05%
C L = R 1kHz ≤0.05%
SL L = -R 1kHz ≤0.05%
SR L = -R 1kHz ≤0.05%
L L 1kHz ≥85dB
R R 1kHz ≥85dB
C L = R 1kHz ≥85dB
SL L = -R 1kHz ≥85dB
SR L = -R 1kHz ≥85dB
40Hz 0 ± 0.2 dB
20kHz 0 ± 0.4 dB
40Hz 0 ± 0.2 dB
20kHz 0 ± 0.4 dB
300Hz 0 ± 0.2 dB
20kHz 0 ± 0.4 dB
30Hz 0 ± 0.4 dB
6.5kHz -3 ± 1 dB
POWER AMPLIFIER: External 5.1 input = 2V
1. Output level All 5 1kHz 2.2 ± 0.3 V
2. THD, with 30kHz LPF All 5 1kHz ≤0.01%
3. S/N Ratio, A-wtd All 5 ≥90dB
4. Frequency response All 5 20Hz-20kHz 0 ± 0.2 dB
2. S/N Ratio A-
wtd
With audio BPF
1. THD
With 80kHz LPF
SL/SR L = -R
3. Frequency Response
1kHz reference
LL
RR
CL = R
PHYSICAL SPECIFICATIONS:
Size (W x H x D) 17 3/4 x 3 7/8 x 11 1/4"
��(450 x 97 x 285 mm��)
Net weight 11 lbs (4.99kg)
Shipping weight 13 lbs (5.89kg)

1
Flextronics Design Finland
Finlaysoninkatu 2
33210 Tampere
FINLAND
Tel. [phone]
11
Main sheet
NAD S170
2.2b
17-May-2002
13:16:11
Title
Size:
Project:
Date:
File:
Revision:
Sheet
of
Time:
A3
Author:
Jouni Myllymäki
Logic
Logic.Sch
On-screen display
Osd.sch
Output Buffering
OutBuf.sch
S-Video switching
SVid_swi.sch
Component video switching
Compon.sch
Slot connector, serial control, misc.
Slot.sch
Composite video and S-Video REC switching
Cs_swi.sch
S-Video switching
1
6
Composite switching
1
6
Component
video selector
1
2
Control logic
OSD Switching
Osd_swi.sch
OSD
Interrupt
2
3
4
5
2
3
4
5
4
5
6
5
4
6
OSD
PAL/NTSC
Detection
Separation
VSync
Misc. Logic
Digital Audio Outputs And RS-232 Interface
Misc.Sch
Digital Audio Inputs
DigIn.Sch
RS-232
Input selector
1
2
3
4
1
2
NADLINK
RC5
IR sensor
Video & Digital I/O schematics

KEY BOARD - COMPONENT SIDE
KEY BOARD - SOLDER SIDE

VIDEO BOARD - COMPONENT SIDE
VIDEO BOARD - SOLDER SIDE

PCB LAYOUT
MAIN BOARD - COMPONENT SIDE

MAIN BOARD - SOLDER SIDE

2
11
NTSC/PAL detection & miscellaneous logic
NAD S170
2.2b
17-May-2002
13:17:20
Title
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Project:
Date:
File:
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Sheet
of
Time:
A3
Author:
IO
1
IO
2
IO
3
IO
4
IO / GCK2
6
IO / GCK3
7
IO
8
IO
9
GND 10
IO
11
IO
12
IO
13
IO
14
TDI
15
TMS
16 TCK
17
IO
18
IO
19
IO
20
IO
22
GND 23
IO
24
IO
25
IO
26
IO
27
IO
28
IO
29
TDO
30
Vccio 32
IO
33
IO
35
IO
36
IO
37
IO / GSR
39 IO / GTS2
40
Vcc 41
IO / GTS1
42
IO
43
IO / GCK1
5
Vcc 21
GND 31
IO
44
IO
34
IO
38
IC29
XC9536_PC44
+5D
C186
10nF
C189
10nF
C200
10nF
C194
100nF
C201
100nF
C197
100nF
3 4
5 6
7 8
1 2
X15
X8P2M
+5D
C178
100uF
RESET
OSC_SEL_NTSC
PAL/NTSC
OSC_SEL_PAL
SEL_SIG_INFO
SEL_SIG_INFO
VSYNC_OUT
SYDET
INTERRUPT
INT_ACK
LATCH_SEL
ENA_VIDEO
TP16
TP18
TP21
TP25
TP15
TP24
TP29
TP22
TP27
TP30
TP33
TP31
TP28
TP23
TP26
OUT
2
VDD
3
GND
1
CR3
Epson SG-10
Crystal oscillator 32.768kHz
+5D
C184
100nF
TP37
TP38
BYPASS_OSD_C
XILINX_2
XILINX_1
OSD_FB

3
11
OSD
NAD S170
2.2b
17-May-2002
13:17:57
Title
Size:
Project:
Date:
File:
Revision:
Sheet
of
Time:
A3
Author:
L22
Not installed
C140
Not installed
VSYNC_OUT
R206
2k4
C175
100nF
R209
2k4
5
6
7
IC26B
LM393M
R211
3k9 R207 10k
+5A
CR1
14.31818MHz
C164
22pF
CR2
17.734475MHz
Vertical sync detection
C177
100nF
+5D
+5D
4 IO
11
3 IO
8
2 IO
4
1 IO
1
1C
13
2C
5
3C
6
4C
12
4 OI
10
3 OI
9
2 OI
3
1 OI
2
GND
7
VCC
14
IC25
74HC4066
C158
100nF
C156
33pF
C163
C168
33pF
PAL/NTSC
SYDET
FRM/DET
C241
100uF
4*fs Oscillators for PAL/NTSC
OSC_SEL_NTSC
OSC_SEL_PAL
SEL_SIG_INFO
SEL_SIG_INFO
Signal Format/Detection Out
SEL_SIG_INFO = 0 - Detection; 1 - PAL/NTSC
R285
10k
R210
4k7
+5D
3
2
1
84
IC26A
LM393M
+5D
C176
100nF
Unused
OSD_MOSI
OSD_SCLK
OSD_CS
OSD_Y_IN
OSD_Y_UNBUF
OSD
YOUT
1
VIDEO IN
2
RES
3
FTR
4
AVdd
5
DVdd
6
CSYNC
7
XTAL IN
8
XTAL OUT
9
MUTE
10
DATA
11
CLK
12
CSN
13
R
14
YIN
28
VIDEO OUT1
27
VIDEO OUT2
26
CIN
25
COUT
24
LESCREEN
23
LECHAR
22
AGND
21
DGND
20
BAR
19
CO
18
FB
17
B
16
G
15
IC24A
STV5730A-SO
C132
100nF
C133
100uF
R277
Not installed
R276
0R
R233
0R
R173
5k6
R182
22k
C139
220pF
C134
22nF
R283
4k7
+5A
+5A
+5D
C129
100nF
R177
5k6
R278
3k3
R178
5k6
R281
2k2
C149
2u2
OSD_C_OUT
R279
Not installed
R280
Not installed
+5A
C131
100nF
C232
100nF
C236
100nF
OSD_CHROMA
MAX_NC
+5A
XILINX_2
C141
2u2
R137
470k
VREF
C242
1nF
D47
OSD_FB
R263
330k
+5A
R275
Not installed
C142
100nF
VREF
Chroma attenuator
1
5
3
4
6
2
IN
COM
Vcc
NO
NC
GND
IC37
MAX4599
D56
-5A
-5A
VREF

4
11
SVideo & Composite Output Buffering
NAD S170
2.2b
17-May-2002
13:18:37
Title
Size:
Project:
Date:
File:
Revision:
Sheet
of
Time:
A3
Author:
R24
75R
3
2
1
84
IC4A
OPA2652
R43
47k
C20
Not installed
R45
Not installed
Note 1
SVIDEO_C_OUT
SVIDEO_Y_OUT
5
6
7
IC16B
OPA2652
+5A
-5A
3
2
1
84
IC16A
OPA2652
C101
100nF
C102
100nF
R153
75R
R116
75R
R114
47k
R135
47k
+5A
-5A
C108
Not installed
R128
Not installed
C98
Not installed
R124
Not installed
Note 1
Note 1
CsVIDEO_TO_OUTBUF
SVIDEO_Y_TO_OUTBUF
SVIDEO_C_TO_OUTBUF
S-Video OSD out
SVIDEO_Y_OUT
SVIDEO_C_OUT
C96
Not installed
C117
Not installed
S-Video 4 out
SVID_Y_OUT4
SVID_C_OUT4
C76
Not installed
C97
Not installed
VIDEO OSD OUT
VIDEO 6 OUT
Composite video 6 and OSD outputs
Note 2
SVideo OSD output buffers
+5A
-5A
C120
100nF
C121
100nF
SVID_C_OUT4
SVID_Y_OUT4
5
6
7
IC17B
OPA2652
R122
1k
R121
1k
+5A
-5A
3
2
1
84
IC20A
OPA2652
R170
1k
R171
1k
R100
75R
R112
75R
R120
47k
R169
47k
C92
Not installed
R133
Not installed
C116
Not installed
R159
Not installed
Note 1
Note 1
SVIDEO_4_Y
SVIDEO_4_C
SVID_C_OUT6
SVID_Y_OUT6
3
2
1
84
IC17A
OPA2652
R152
1k
R148
1k
5
6
7
IC18B
OPA2652
R131
1k
R132
1k
R126
75R
R143
75R
R147
47k
R130
47k
C99
Not installed
R125
Not installed
C111
Not installed
R119
Not installed
Note 1
Note 1
SVIDEO_6_Y
SVIDEO_6_C
S-Video 5 out
SVID_Y_OUT5
SVID_C_OUT5
C74
Not installed
C95
Not installed
S-Video 6 out
SVID_Y_OUT6
SVID_C_OUT6
C100
Not installed
C115
Not installed
S-Video outputs
SVID_C_OUT5
SVID_Y_OUT5
5
6
7
IC20B
OPA2652
R145
1k
R151
1k
+5A
-5A
3
2
1
84
IC15A
OPA2652
R142
1k
R141
1k
R104
75R
R106
75R
R150
47k
R140
47k
C122
Not installed
R158
Not installed
C91
Not installed
R118
Not installed
Note 1
Note 1
SVIDEO_5_Y
SVIDEO_5_C
SVideo 4 output buffers
SVideo 5 & 6 output buffers
Composite video OSD output buffer
C25
100nF
C26
100nF
C103
100nF
C104
100nF
C84
100uF
C85
2u2
C89
100uF
C52
2u2
C135
100uF
C90
100uF
C150
100uF
C87
100uF
C57
2u2
C88
100uF
C83
2u2
C82
100uF
C32
100uF
1
3
2
4
5
7
6
8
GND
X8
X4F2SVHS
1
3
2
4
5
7
6
8
GND
X7
X4F2SVHS
2
3
1
X3
X2RCA
L15
NFM51R00P206
L13
NFM51R00P206
L14
NFM51R00P206
R54
Not installed
R48
Not installed
Cs_OUT6
+5A
-5A
C109
100nF
C110
100nF
C185
Not installed
R257
Not installed
C226
Not installed
R258
Not installed
C227
Not installed
R259
Not installed
C228
Not installed
R260
Not installed
C229
Not installed
R261
Not installed
C230
Not installed
R262
Not installed
R203
Not installed
R204
Not installed
R212
Not installed
R217
Not installed
R219
Not installed
R220
Not installed
R222
Not installed
R253
Not installed
Note 2
Note 2
Note 2
Note 2
R53
1k
C152
Not installed
R18
Not installed
R44
1k
R136
1k
C231
Not installed
R42
Not installed
R115
1k
R111
1k
C154
Not installed
R107
Not installed
R110
1k

5
11
S-Video switching
NAD S170
2.2b
17-May-2002
13:19:11
Title
Size:
Project:
Date:
File:
Revision:
Sheet
of
Time:
A3
Author:
S-Video 1
S-Video 2
S-Video 3
S-Video 4
SVIDEO_1_Y
SVIDEO_1_C
SVIDEO_2_Y
SVIDEO_2_C
SVIDEO_3_Y
SVIDEO_3_C
SVIDEO_4_Y
SVIDEO_4_C
R63
75R
R57
75R
S-Video inputs
S-Video 5
S-Video 6
SVIDEO_5_Y
SVIDEO_5_C
SVIDEO_6_Y
SVIDEO_6_C
S-Video selector & buffers
SVIDEO_1_Y
SVIDEO_2_Y
SVIDEO_3_Y
SVIDEO_4_Y
SVIDEO_5_Y
SVIDEO_6_Y
SVIDEO_1_C
SVIDEO_2_C
SVIDEO_3_C
SVIDEO_4_C
SVIDEO_5_C
SVIDEO_6_C
SVIDEO_Y_SW_OUT
SVIDEO_C_SW_OUT
4 IO
11
3 IO
8
2 IO
4
1 IO
1
1C
13
2C
5
3C
6
4C
12
4 OI
10
3 OI
9
2 OI
3
1 OI
2
GND
7
VCC
14
IC8
74HC4066
4 IO
11
3 IO
8
2 IO
4
1 IO
1
1C
13
2C
5
3C
6
4C
12
4 OI
10
3 OI
9
2 OI
3
1 OI
2
GND
7
VCC
14
IC10
74HC4066
4 IO
11
3 IO
8
2 IO
4
1 IO
1
1C
13
2C
5
3C
6
4C
12
4 OI
10
3 OI
9
2 OI
3
1 OI
2
GND
7
VCC
14
IC12
74HC4066
VREF
VREF
C46
100nF
+5A
C56
100nF
+5A
SEL_SV1
SEL_SV2
SEL_SV3
SEL_SV4
SEL_SV5
SEL_SV6
C69
100nF
+5A
R61
75R
R59
75R
VREF
VREF
R77
75R
R68
75R
VREF
VREF
R75
75R
R71
75R
VREF
VREF
R91
75R
R83
75R
VREF
VREF
R92
75R
R84
75R
VREF
VREF
C38
10nF
C49
10nF
C53
100nF
C60
10nF
C63
10nF
C73
10nF
5
6
7
IC4B
OPA2652
5
6
7
IC15B
OPA2652
R113
47k
R23
47k
D20
D24
D19
D23
D28
D32
D27
D31
D37
D41
D36
D40
+5A
+5A
+5A
+5A
+5A
+5A
R90
470k
R82
470k
-5A
R99
470k
R85
470k
-5A
R74
470k
R65
470k
-5A
R80
470k
R70
470k
-5A
R60
470k
R56
470k
-5A
R62
470k
R58
470k
-5A
C29
Not installed
R33
Not installed
C86
Not installed
R123
Not installed
Note 1
Note 1
R38
470k
R139
470k
VREF
VREF
-5A
-5A
D17
D43
+5A
+5A
+5A
+5A
+5A
+5A
R49
470k
R32
470k
VREF
VREF
C41
2u2
C48
100uF
C40
2u2
C47
100uF
C55
2u2
C59
100uF
C54
2u2
C58
100uF
C67
2u2
C72
100uF
C66
2u2
C71
100uF
C34
2u2
C68
100uF
C33
2u2
C81
100uF
1
3
2
4
5
7
6
8
GND
X4
X4F2SVHS
1
3
2
4
5
7
6
8
GND
X5
X4F2SVHS
1
3
2
4
5
7
6
8
GND
X6
X4F2SVHS
R291
25R
R292
25R
R289
75R
R288
75R
D21
BAS70-04
D25
BAS70-04
D18
BAS70-04
D29
BAS70-04
D22
BAS70-04
D33
BAS70-04
D26
BAS70-04
D30
BAS70-04
D38
BAS70-04
D42
BAS70-04
D35
BAS70-04
D39
BAS70-04

6
11
Component video switching
NAD S170
2.2b
17-May-2002
13:20:07
Title
Size:
Project:
Date:
File:
Revision:
Sheet
of
Time:
A3
Author:
COMP_Y_1
COMP_RY_1
COMP_BY_1
Component video inputs & outputs
R163
75R
R196
75R
4 IO
11
3 IO
8
2 IO
4
1 IO
1
1C
13
2C
5
3C
6
4C
12
4 OI
10
3 OI
9
2 OI
3
1 OI
2
GND
7
VCC
14
IC21
74HC4066
COMP_Y_1
COMP_BY_1
COMP_RY_1
R161
1k
R156
1k
+5A
-5A
R192
1k
R191
1k
Sel_Comp1
3
2
1
84
IC18A
OPA2652
3
2
1
84
IC23A
OPA2652
C125
100nF
+5A
R160
47k
R193
47k
C146
100nF
C143
100nF
Component video selector & buffers
R167
75R
VREF
R187
75R
R194
75R
VREF
VREF
+5A
-5A
C114
Not installed
R166
Not installed
C145
Not installed
R198
Not installed
Note 1
Note 1
D49
D46
D44
+5A
+5A
+5A
R162
470k
R176
470k
R190
470k
-5A
-5A
-5A
R186
75R
R184
1k
R179
1k
5
6
7
IC23B
OPA2652
R183
47k
C144
Not installed
R174
Not installed
Note 1
R146
470k
R189
470k
R175
470k
VREF
VREF
VREF
C119
100uF
C130
100uF
C147
100uF
C159
100uF
C124
100uF
C157
100uF
C151
100uF
C137
100uF
CMP_Y_RCA
CMP_BY_RCA
CMP_RY_RCA
CMP_Y_RCA
CMP_RY_RCA
CMP_BY_RCA
L16
NFM51R00P206
L18
NFM51R00P206
L17
NFM51R00P206
R165
Not installed
L19
NFM51R00P206
L21
NFM51R00P206
L20
NFM51R00P206
R185
Not installed
L23
NFM51R00P206
L25
NFM51R00P206
L24
NFM51R00P206
R195
Not installed
Note 2
Note 2
Note 2
Y B-Y R-Y
3
5
6
2
4
1
X9
X4RCA
3
5
6
2
4
1
X10
X4RCA
NADLINK_OUT
NADLINK_IN
NADLINK_GND
+5A
-5A
C112
100nF
C113
100nF
C233
Not installed
R265
Not installed
C234
Not installed
R266
Not installed
C235
Not installed
R267
Not installed
D45
BAS70-04
D48
BAS70-04
D50
BAS70-04

7
11
Miscellaneous circuits
NAD S170
2.2b
17-May-2002
13:20:55
Title
Size:
Project:
Date:
File:
Revision:
Sheet
of
Time:
A3
Author:
3
4
5
6
7
8
9
10
11
12
14
13
1
2
15
16
18
17
19
20
X14
X20P2M
IDENT_DATA_OUT
IDENT_CLK
RESET
R241
10k
VIDEO_SCLK
+5D
VIDEO_MOSI
+5D
+5D
Slot connector & Control bus buffering
R238
10k
R236
10k
SERIN
14
SRCLK
11
SRCLR
10
RCLK
12
G
13
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
SEROUT
9
VCC
16
GND
8
IC9
74HC595
SERIN
14
SRCLK
11
SRCLR
10
RCLK
12
G
13
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
SEROUT
9
VCC
16
GND
8
IC13
74HC595
SERIN
14
SRCLK
11
SRCLR
10
RCLK
12
G
13
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
SEROUT
9
VCC
16
GND
8
IC19
74HC595
VIDEO_SCLK
LATCH_SEL
VIDEO_MOSI
C50
100nF
ENA_VIDEO
VIDEO_SCLK
LATCH_SEL
ENA_VIDEO
VIDEO_SCLK
ENA_VIDEO
+5A
C70
100nF
+5A
C105
100nF
+5D
SEL_COMP1
SEL_SV1
SEL_SV2
SEL_SV3
SEL_SV4
SEL_SV5
SEL_SV6
SEL_Cs1
SEL_Cs2
SEL_Cs3
SEL_Cs4
SEL_Cs5
SEL_Cs6
TP7
2 1
3
VR1
TL431
+5A
VREF
3.4 V reference voltage
Source selector, REC selector & OSD control signals
3
4
5
6
7
8
1
2
X11
X8P2M
D
14
A
11
SER
10
B
12
C
13
CLK inh
15
SH/DL
1
CLK
2
E
3
F
4
G
5
H
6
Qh
7
Qh
9
VCC
16
GND
8
IC32
74HC165
RESET
IDENT_CLK
C205
100nF
IDENT_DATA_OUT
Slot Identification circuit
+5D
+5D
ID:6
+5A
Video power connector
-5A
C118
100nF
R66
10k
R64
R67
R69
R72
R76
R79
R81
R93
10k
R94
R97
R101
R102
R103
R105
R129
10k
R127
R134
R138
R144
R149
VREF
LATCH_SEL
R154
R157
+5A
-5A
Note 1:
Notes
No PCB groundplane
inside this component area
Note 2:
Should be at least 100k
if installed
INTERRUPT
LATCH_CTRL
BYPASS_SVIDEO
BYPASS_CsVIDEO
OSC_SEL_NTSC
R164
27k
C136
100nF
C126
100nF
C75
100nF
1G
1
1A1
2
1Y1
18
1A2
4
1Y2
16
1A3
6
1Y3
14
1A4
8
1Y4
12
VCC
20
GND
10
2A1
17
2Y1
3
2A2
15
2Y2
5
2A3
13
2Y3
7
2A4
11
2Y4
9
2G
19
IC30
74HC244
C43
100nF
OSD_SCLK
OSD_MOSI
OSD_CS
+5D
C193
100nF
R242
10k
R235
10k
R229
10k
R228
10k
R223
10k
R225
10k
R224
10k
R227
10k
+5D
C35
100nF
C31
100nF
TP3
TP1
TP4
TP9
TP6
TP19
TP17
TP12
TP10
TP2
TP5
TP11
VGND & DGND Testpoints
R78
0R
Ground connection should be placed on PCB as close to IC25, IC26 and IC27 as possible.
+5A
+5D
R168
10k
R172
150R
+5D
+5D
+5D
R226
10k
LATCH_CTRL
VIDEO_MOSI
R239
10k
D34
LL4148
C123
10uF
C206
10uF
C162
470uF
C148
470uF
C138
470uF
C155
470uF
C128
100nF
L26
Ferrite bead
+5A
-5A
SVID_2_OUT
SEL_SIG_INFO
FRM/DET
INT_ACK
C165
100nF
TP8
C94
100uF
C17
100uF
C93
100uF
C153
100uF
C2
100uF
C6
100uF
C183
470uF
Cs->SV_2_OUT
CsVID_2_OUT
+5D
MH2
R3
0R
MH1
R4
Not installed
MH4
R231
0R
Mounting holes
C173
100nF
C169
100nF
R215
Not installed
R188
Not installed
+5D,+5A,-5A Testpoints
+5D
+5D
+5A
-5A
D55
LL4148
SVID/CsVIDEO2OSD
CsVIDEO2OSD
R284
BYPASS_OSD_C