NAD T 163 User manual

NAD
SERVICE MANUAL
T 163
T 163
AV Tuner Preamplifier
AV Tuner Preamplifier
DRAFT DATE: 25 MAR 2004

2
SAFETY INFORMATION

3
SERVICESAFETYPRECAUTIONS
1. Replacing the fuses
CAUTION:
FOR CONTINUED PROTECTIONAGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF
FUSE.
Reference Designator Part Number Description
F751 33-0151009-00-88 FUSE 500mA 250VAC TIME-LAG 5X20mm
5T UL/CSA/VDE/SEMKO
F752 33-0111009-00-88 FUSE 1A 250VAC TIME-LAG 5X20mm
5T UL/CSA/VDE/SEMKO
2. Safety check out
(Only U.S.A. model)
Before returning the product to the customer, make leakage current or resistance measurements to determine
that exposed parts are acceptably insulated from supply circuit.
CONTENTS
DESCRIPTION PAGE
SPECIFICATIONS............................................................................................................................ 4 - 5
REAR PANEL / FRONTPANEL VIEW .................................................................................................. 6
DISASSEMBLYINSTRUCTIONS .......................................................................................................... 7
WIRINGDIAGRAM................................................................................................................................ 8
BLOCKDIAGRAM................................................................................................................................. 9
SPECIALFUNCTION .......................................................................................................................... 10
DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING .................................................... 10
PCB LAYOUT ................................................................................................................................11 - 19
SCHEMATICDIAGRAM ............................................................................................................... 20 - 32
ICBLOCKDIAGRAM ................................................................................................................... 33 - 40
EXPLODEDVIEW............................................................................................................................... 41
EXPLODED VIEW PARTS LIST................................................................................................... 42 -43
ELECTRICALPARTS LIST .......................................................................................................... 44 - 55
PACKINGDIAGRAM .......................................................................................................................... 56
VERSIONHISTORY .......................................................................................................................... 57
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.

4
SPECIFICATIONS
PRE AMPLIFIER SECTION
Rated distortion (2 V@Pre-out, THD 20 Hz-20 kHz FL/C/FR) ≤0.1 %
(2 V@Pre-out, THD 20 Hz-20 kHz SL/SR/BS) ≤0.1 %
Input Sensitivity (2 V@Pre-out, 1 kHz) 520 ± 20 mV
S/N Ratio (A-wtd, 1kHz, 1 W, 2 V@Pre-out, FL/C/FR/SL/SR/BL) ≥≥
≥≥
≥80 dB
Frequency Response (20 Hz - 20 kHz) 0 ± 1.0 dB
Channel Balance (1 dB to -40 dB, 1 kHz) ≤2 dB
(-41 dB to -50 dB, 1 kHz) ≤3 dB
Audio muting at 1 kHz ≥≥
≥≥
≥55 dB
Subwoofer out, 500 mV in (THD at 2 V O/P, 100 Hz) ≤0.5 %
Crosstalk (500 mV input, 1 V@Pre-out) ≥≥
≥≥
≥60 dB
Controls
Bass (at 500 mV in, 1 W out, 100 Hz) ± 10 dB ± 2 dB
Treble (at 500 mV in, 1 W out, 10 kHz) ± 10 dB ± 2 dB
DOLBY DIGITAL SECTION
Channel Difference (FL ref. Track 30) ± 1.2 dB
Frequency Resporse at Dolby config.2 SL Track 46 200 - 20 kHz ± 0.8 dB
SR Track 47 200 - 20 kHz ± 0.8 dB
C Track 44 200 - 20 kHz ± 0.8 dB
Harmonic Distortion (2 V@Pre-out, Audio LPF, Dolby Congfig 1) FL Track 65 997 Hz ≤0.08 %
FR Track 67 997 Hz ≤0.08 %
SL Track 68 997 Hz ≤0.08 %
SR Track 69 997 Hz ≤0.08 %
C Track 66 997 Hz ≤0.08 %
S/N Ratio (TRACK 30 for O/P 1 W, PAUSE) CCIR / ARM ≥≥
≥≥
≥65 dB
Audio LPF ≥≥
≥≥
≥70 dB
A-WTD ≥≥
≥≥
≥70 dB
DOLBY PRO LOGIC II SECTION
Frequency Resporse
I/P mode : L, R : 1 V in, 1 W, Ch L/R 40 Hz 0 ± 2.0 dB
20 kHz 0 ± 2.0 dB
I/P mode : L=R : 1 V in, 1 W, Ch /L/R 40 Hz 0 ± 2.0 dB
Ch C 20 kHz 0 ± 2.0 dB
I/P mode : L=-R : 1 V in, 1 W, Ch SL/SR 40 Hz 0 ± 2.0 dB
20 kHz 0 ± 2.0 dB
S/N Ratio (200 mV in, 1 W, A-WTD w/ 1 k termination)
I/P mode : L, R : 1 kHz, Ch L/R ≥≥
≥≥
≥65 dB
I/P mode : L=R : 1 kHz, Ch C ≥≥
≥≥
≥65 dB
I/P mode : L=-R : 1 kHz, Ch SL/SR ≥≥
≥≥
≥65 dB
THD (2.2 V in, 1 W, w/ 80 kHz LPF, 1 kHz) ≤0.2 %

5
DTS SECTION
Output Level (Vol 0 dB) : FL/FR/C/SL/SR Track 6 1 kHz 90 ± 10 mV
Channel Difference (FL ref): FL/FR/C/SL/SR Track 6 1 kHz ± 1.0 dB
Harmonic Distortion (Audio Filter) : FL/FR/C/SL/SR Track 10-14 1 kHz ≤≤
≤≤
≤0.08 %
Frequency Response (20 Hz to 20 kHz) Track 26-30 +2/-1.5
Subwoofer Output Level 1 kHz ref at pre-out (FL) Play Track 10, charge to 15 12.5 ± 1.5 dB
AM TUNER SECTION
Input level is expressed as the reading in open circuit
of 75-ohm source impedance signal generator
Usable sensitivity (999/1000 kHz) ≤≤
≤≤
≤30 dBuV
S/N Ratio (5 mV in) ≥≥
≥≥
≥38 dB
THD (5 mV in) ≤≤
≤≤
≤3 %
IF Rejection (450 kHz) ≥≥
≥≥
≥36 dB
Image Rejection (F+2xIF) ≥≥
≥≥
≥28 dB
Selectivity ≥≥
≥≥
≥17 dB
Output 200 ± 20 mV
Loop sensitivity (20 dB S/N)
999/1000 kHz ≤≤
≤≤
≤66 dB
603/600 kHz ≤≤
≤≤
≤66 dB
1404/1400 kHz ≤≤
≤≤
≤66 dB
Frequency Response (100 - 2.3 kHz, 5 mV) ± 6 dB
FM TUNER SECTION *C *AH
Input level is expressed as the reading in open circuit
of 75-ohm source impedance signal generator
Usable sensitivity (98 MHz) ≤≤
≤≤
≤15 dBµV ≤≤
≤≤
≤15 dBuv
S/N Ratio (60 dB, IHF wtd) Mono ≥≥
≥≥
≥63 dB ≥≥
≥≥
≥63 dB
Stereo ≥≥
≥≥
≥63 dB ≥≥
≥≥
≥63 dB
Frequency Response (20 Hz - 15 kHz, 60 dBµ) 0 ± 1.5 dB 0 ± 1.5 dB
Channel Separation (60 dBµ) 100 Hz ≥≥
≥≥
≥30 dB ≥≥
≥≥
≥30 dB
1 k ≥≥
≥≥
≥38 dB ≥≥
≥≥
≥38 dB
10 kHz ≥≥
≥≥
≥30 dB ≥≥
≥≥
≥30 dB
Alternate Channel Selectivity (40 dBµ, ± 400 kHz) ≥≥
≥≥
≥60 dB ≥≥
≥≥
≥45 dB
Capture Ratio (40 dBµ) ≤≤
≤≤
≤3 dB ≤≤
≤≤
≤3 dB
AM Suppression (60 dBµ, 100% Mod. FM, 30% Mod. AM) ≥≥
≥≥
≥48 dB ≥≥
≥≥
≥48 dB
Image Rejection (119.4 MHz) −−
−−
−≥≥
≥≥
≥65 dB
I.F. Rejection (10.7 MHz) ≥≥
≥≥
≥78 dB −−
−−
−
Pilot Suppression (98 MHz) ≥≥
≥≥
≥60 dB ≥≥
≥≥
≥60 dB
THD (60 dBµ, L=R 75 kHz for AH, 40 kHz Dev for C) Mono ≤≤
≤≤
≤0.25 % ≤≤
≤≤
≤0.25 %
Stereo ≤≤
≤≤
≤0.35 % ≤≤
≤≤
≤0.35 %
Auto-Search Sensitivity On ≥≥
≥≥
≥24 dBµ ≥≥
≥≥
≥24 dBµ
Off ≤≤
≤≤
≤15 dBµ ≤≤
≤≤
≤15 dBµ
RDS decode Sensitivity ≤≤
≤≤
≤26 dBµ −−
−−
−
PHYSICAL SPECIFICATIONS
Dimensions (Width x Height x Depth) 435 x 150 x 399 mm
Net Weight 8 Kg (17.60 lbs)
Shipping Weight 10.2 Kg (22.40 lbs)
(17-1/8 x 5-15/16 x 15-3/8")

6
FRONT PANEL
REAR PANEL / FRONT PANEL VIEW
REAR PANEL
1. MONITOR OUT
2. CD INPUT
3. FM &AMANTENNA
4. DIGITALAUDIO INPUT &
DIGITALAUDIO OUTPUT
5. COMPONENT VIDEO IN &
COMPONENT VIDEO OUT
6. POWER SWITCH
7. 120V / 230V VOLTAGE SELECTOR
8. RS-232
9. AUTO TRIGGER SWITCH
10. AC POWER INLET
11. MS OUT (MULTISOURCE OUT)
12. IR INPUT & OUTPUT
13. DVD, SAT, VCR, VIDEO 4 & VIDEO 5
14. PRE-OUTS / SUBWOOFER OUT
15. TAPE INPUT & OUTPUT
16. DISC INPUT
17. 7.1 CH. INPUTS
1. STANDBY SWITCH
2. STANDBY LED
3. AM / FM
4. DISPLAY
5. MEMORY
6. FM MUTE / MODE
7. PRESET DOWN / UP
8. SEARCH DOWN / UP
9. VFL DISPLAY
10. VOLUME (SETUP)
11. VIDEO &AUDIO
12. TAPE MONITOR
13. DIGITALAUDIOSELECTOR
14. EXT. 7.1
15. SURROUND MODE
16. LEVELS
17. TONE CONTROLS
18. TONE DEFEAT
19. VIDEO 6 INPUT
20. PHONES

7
DISASSEMBLY INSTRUCTIONS
1. Remove machine screws M4.0 x 8.0 (1to 6) from the side panels.
Remove tapping screw 3.0 x 8.0 (7to 10) from the back panel.
Refer to Figure No. 1.
2. Pull both sides of the TOP COVER slightly outwards 11 and tilt approx. 35° and then remove
in the direction as indicated by the arrow 12. Refer to Figure No. 2.
Figure No. 1
Figure No. 2

8
A
U
DI
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B
O
AR
D
PRE-
OU
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O
AR
D
M
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LTI-
C
HANNE
L
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MP
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VIDE
O
B
O
AR
D
DIGITAL B
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AR
D
P
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SU
PPL
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B
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ARD
MAIN B
O
ARD
P
O
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S
WIT
CH
B
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ARD
J
7
53B
KEYB
O
AR
D
T
U
NE
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VIDE
O
6
B
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J
7
53A
J90
1
A
P
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AR
D
FR
O
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S
F
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RME
R
J
7
5
1
B
FR
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F
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RME
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J754B
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7
5
7
A
J
7
56A
J756B
J757B
8
2-
0
42
6
1
35
-
0
1-X
X
C
ABLE A
SS
Y 4 WAY
S
#2
6
2
.5
P
U
L2
8
77 L=4
30
M
M
8
2-
0
42
6
1
35
-
0
2-X
X
C
ABLE A
SS
Y 4 WAY
S
#2
6
2
.5
P
U
L 2
8
7
7
L=
500
M
M
8
2-
0
22
6
1
35
-
0
4-X
X
C
ABLE A
SS
Y 4 WAY
S
#2
6
2
.5
P
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L1
533
L=
5
4
0
M
M
8
2-
0
42
6
1
35
-
00
-X
X
C
ABLE A
SS
Y 4 WAY
S
#2
6
2
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8
77 L=2
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M
M
82-0526135-01-XX
C
ABLE A
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5
WAY
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#2
6
2
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P
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L24
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L=1
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M
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8
2-
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2
6
1
35
-
08
-X
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C
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Y
3
WAY
S
#2
6
2
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P
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L2
85
4 L=
300
M
M
8
2-
06
2
6
1
35
-
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-X
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C
ABLE A
SS
Y
6
WAY
S
#2
6
2
.5P
UL2877 L=480MM W
/
HOUSIN
G
8
2-
08
2
6
1
35
-
03
-X
X
C
ABLE A
SS
Y
8
WAY
S
#2
6
2
.5
P
U
L2
8
77 L=4
50
M
M
8
2-
03
2
6
1
35
-
06
-X
X
C
ABLE A
SS
Y
3
WAY
S
#2
6
2
.5
P
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L2
85
4 L=2
50
M
M
8
2-
0
11
6
4
35
-
0
4-X
X
C
ABLE A
SS
Y 1 WAY #1
6
U
L1
6
72 BR
O
WN L=1
60
M
M
8
2-
0
11
6
4
35
-
05
-X
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C
ABLE A
SS
Y 1 WAY #1
6
U
L1
6
72 BL
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60
M
M
82-0426135-05-X
X
C
ABLE A
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S
#2
6
2
.5
P
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L24
68
L=4
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M
M
8
2-
08
2
6
1
35
-
0
1-X
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C
ABLE A
SS
Y
8
WAY
S
#2
6
2
.5
P
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L2
8
77 L=4
50
M
M
8
2-1
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2
6
1
35
-
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1-X
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C
ABLE A
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Y 1
0
WAY
S
#2
6
2
.5
P
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L2
8
77 L=
5
4
0
M
M
36
-2
8
2
8
2
0
1-71-X
X
FF
C
C
ABLE 2
8
PIN
S
P1
.
2
5
L=2
00
M
M
36
-2
0
2
8
121-71-X
X
FF
C
C
ABLE 2
0
PIN
S
P1
.
2
5
L=12
0
M
M
36
-172
830
1-71-X
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FF
C
C
ABLE 17 PIN
S
P1.25 UL2896 L=300M
M
36
-
30
2
806
1-71-X
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FF
C
C
ABLE
30
PIN
S
P1
.
2
5
L=
60
M
M
8
2-
05
2
6
1
35
-
0
2-X
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C
ABLE A
SS
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5
WAY
S
#2
6
2
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P
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L24
68
L=12
0
M
M
8
2-
0
11
8
4
35
-
0
1-X
X
C
ABLE A
SS
Y 1 WAY #1
8
U
L1
00
7 BLA
C
K L=
360
M
M
W
/
RING TERMINA
L
T1
63
WIRE DIA
G
RAM
REV.A
D
ATE 1
6
-
6
-2
003
36
-2
8
2
8
141-71-X
X
FF
C
C
ABLE 2
8
PIN
S
P1
.
2
5
L=14
0
M
M
8
2-
0
11
8
4
35
-
00
-X
X
C
ABLE A
SS
Y 1 WAY #1
8
U
L1
00
7 BLA
C
K L=1
00
M
M
W
/
RING TERMINA
L
8
2-
0
11
6
4
35
-
06
-X
X
C
ABLE A
SS
Y 1 WAY #1
6
U
L1
00
7 BLA
C
K L=7
0
M
M
W
/
RING TERMINA
L
8
2-
0
11
8
4
35
-
00
-X
X
C
ABLE A
SS
Y 1 WAY #1
8
U
L1
00
7 BLA
C
K L=1
00
M
M
W
/
RING TERMINA
L
J
7
0
4
A
J
7
08A
J707A
J
71
0A
J
717
A
J719
A
J
72
0A
J
71
5A
J
71
3A
J
714
A
J709
A
J
721
A
J
724
A
J
7
0
2
B
J
7
82
J714
B
J713
B
J715
B
D
S
P B
O
AR
D
J
1
0
1
0B
J100
9B
J1009
A
724
B
J
71
9B
J
717
B
J60
1
A
J60
2
A
J603A
J60
1
B
J60
2
B
J603B
J
7
83A
J
414
B
J
1
0
1
0A
J
7
01
P
44
01
VIDE
O
B
O
AR
D
S
-VIDE
O
B
O
AR
D
M
S
OUT
B
O
AR
D
WIRING DIAGRAM

9
BLOCK DIAGRAM

10
SPECIALFUNCTION
FEATURE KEYS PRESS ON FRONT PANEL
RESET FOR AH VERSION VIDEO + TONE DEFEAT
RESET FOR C VERSION VIDEO + TONE CONTROLS
NTSC / PAL SELECTION VIDEO + MEMORY
VFD ALL DISPLAY AUDIO + TAPE MONITOR
AM FREQ. STEP AM/FM + FM MUTE
DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING
T89C51RD2 (U202) main clock is at 20MHz (X202)
T89C51RD2 (U201) main clock is at 20MHz (X201)
UPPER - +5V supply to KEYBOARD when power up
LOWER - RESET line (TCM810LENB713) when
power up
UPPER - OUTPUT ENABLE (pin 24) of EPROM
(W27C02) when changing SURROUND MODES
LOWER - CHIP ENABLE (pin 22) of EPROM
(W27C02) when changing SURROUND MODES
SCLK (pin 43 of CS49326)
LRCLK (pin 42 of CS49326)
MCLK (pin 30 of CS49326)
NOTE: The waveforms are based on software version V1.26.

11
PCBLAYOUT
AUDIO BOARD
COMPOSITE VIDEO BOARD

12
COMPONENT VIDEO BOARD - COMPONENT SIDE
COMPONENT VIDEO BOARD - COPPER SIDE
DIGITAL BOARD - COMPONENT SIDE
DIGITAL BOARD - COPPER SIDE

13
DSP BOARD - COPPER SIDE
DSP BOARD - COMPONENT SIDE

14
KEY BOARD / LED BOARD
- COMPONENT SIDE KEY BOARD / LED BOARD - COPPER SIDE

15
MAIN BOARD

16
MULTI-CHANNEL BOARD - COMPONENT SIDE
MULTI-CHANNEL BOARD - COPPER SIDE

17
POWER SUPPLY (STANDBY)
S-VIDEO BOARD

18
PRE-OUT BOARD - COMPONENT SIDE
PRE-OUT BOARD - COPPER SIDE

19
MULTI SOURCE
POWER SWITCH
VIDEO 6 BOARD
LED BOARD
TRIGGER BOARD

20
SCHEMATICDIAGRAM
AUDIO SWITCH
RESISTORS : UNLESS OTHERWISE SPECIFIED ARE CARBON FILM. NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALLCERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED,ARE 50V, 10%.