NAD T-163 Service manual

DRAFT DATE: 25 MAR 2004

NAD

SERVICE MANUAL

T 163

AV Tuner Preamplifier

T 163

AV Tuner Preamplifier

SAFETY INFORMA TION

SERVICE SAFETY PRECAUTIONS

1. Replacing the fuses

CAUTION:

FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE.

Reference Designator Part Number Description

F751

F752

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.

33-0151009-00-88 FUSE 500mA 250VAC TIME-LAG 5X20mm

5T UL/CSA/VDE/SEMKO

33-0111009-00-88 FUSE 1A 250VAC TIME-LAG 5X20mm

5T UL/CSA/VDE/SEMKO

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.

CONTENTS

DESCRIPTION PAGE

SPECIFICATIONS............................................................................................................................ 4 - 5

REAR PANEL / FRONT PANEL VIEW .................................................................................................. 6

DISASSEMBL Y INSTRUCTIONS.......................................................................................................... 7

WIRING DIAGRAM................................................................................................................. ............... 8

BLOCK DIAGRAM.................................................................................................................. ............... 9

SPECIAL FUNCTION .......................................................................................................................... 10

DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING .................................................... 10

PCB LAYOUT..................................................................................................................... ...........1 1 - 19

SCHEMA TIC DIAGRAM ............................................................................................................... 20 - 32

IC BLOCK DIAGRAM ................................................................................................................... 33 - 40

EXPLODED VIEW............................................................................................................................... 41

EXPLODED VIEW PAR TS LIST................................................................................................... 42 - 43

ELECTRICAL P AR TS LIST .......................................................................................................... 44 - 55

PACKING DIAGRAM .......................................................................................................................... 56

VERSION HISTORY .......................................................................................................................... 57

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)

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 Subwoofer out, 500 mV in (THD at 2 V O/P, 100 Hz) ≤ 0.5 % Crosstalk (500 mV input, 1 V@Pre-out)

≥≥

≥ 80 dB

≥≥

≥ 55 dB

≥≥

≥ 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

Audio LPF A-WTD

≥≥

≥ 65 dB

≥≥ ≥≥

≥ 70 dB

≥≥ ≥≥

≥ 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 I/P mode : L=R : 1 kHz, Ch C I/P mode : L=-R : 1 kHz, Ch SL/SR THD (2.2 V in, 1 W, w/ 80 kHz LPF, 1 kHz) ≤ 0.2 %

≥≥

≥ 65 dB

≥≥ ≥≥

≥ 65 dB

≥≥ ≥≥

≥ 65 dB

≥≥

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 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

≤≤

≤ 0.08 %

≤≤

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) S/N Ratio (5 mV in) THD (5 mV in) IF Rejection (450 kHz) Image Rejection (F+2xIF) Selectivity Output 200 ± 20 mV Loop sensitivity (20 dB S/N)

999/1000 kHz 603/600 kHz 1404/1400 kHz

Frequency Response (100 - 2.3 kHz, 5 mV) ± 6 dB

≤≤

≤ 30 dBuV

≤≤ ≥≥

≥ 38 dB

≥≥ ≤≤

≤ 3 %

≤≤ ≥≥

≥ 36 dB

≥≥ ≥≥

≥ 28 dB

≥≥ ≥≥

≥ 17 dB

≥≥

≤≤

≤ 66 dB

≤≤ ≤≤

≤ 66 dB

≤≤ ≤≤

≤ 66 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) S/N Ratio (60 dB, IHF wtd) Mono

Stereo Frequency Response (20 Hz - 15 kHz, 60 dBµ) 0 ± 1.5 dB 0 ± 1.5 dB Channel Separation (60 dBµ) 100 Hz

1 k

10 kHz Alternate Channel Selectivity (40 dBµ, ± 400 kHz) Capture Ratio (40 dBµ) AM Suppression (60 dBµ, 100% Mod. FM, 30% Mod. AM) Image Rejection (119.4 MHz) I.F. Rejection (10.7 MHz) Pilot Suppression (98 MHz) THD (60 dBµ, L=R 75 kHz for AH, 40 kHz Dev for C) Mono

Stereo Auto-Search Sensitivity On

Off RDS decode Sensitivity

≤≤

≤ 15 dBµV

≤≤ ≥≥

≥ 63 dB

≥≥ ≥≥

≥ 63 dB

≥≥

≥ 30 dB

≥≥ ≥≥

≥ 38 dB

≥≥ ≥≥

≥ 30 dB

≥≥ ≥≥

≥ 60 dB

≥≥ ≤≤

≤ 3 dB

≤≤ ≥≥

≥ 48 dB

≥≥

−−

−

−− ≥≥

≥ 78 dB

≥≥ ≥≥

≥ 60 dB

≥≥ ≤≤

≤ 0.25 %

≤≤ ≤≤

≤ 0.35 %

≤≤ ≥≥

≥ 24 dBµ

≥≥ ≤≤

≤ 15 dBµ

≤≤ ≤≤

≤ 26 dBµ

≤≤

≤ 15 dBuv

≤≤ ≥≥

≥ 63 dB

≥≥ ≥≥

≥ 63 dB

≥≥

≥ 30 dB

≥≥ ≥≥

≥ 38 dB

≥≥ ≥≥

≥ 30 dB

≥≥ ≥≥

≥ 45 dB

≥≥ ≤≤

≤ 3 dB

≤≤ ≥≥

≥ 48 dB

≥≥ ≥≥

≥ 65 dB

≥≥

−−

−

−− ≥≥

≥ 60 dB

≥≥ ≤≤

≤ 0.25 %

≤≤ ≤≤

≤ 0.35 %

≤≤ ≥≥

≥ 24 dBµ

≥≥ ≤≤

≤ 15 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)

REAR PANEL / FRONT PANEL VIEW

REAR PANEL

1. MONITOR OUT

2. CD INPUT

3. FM & AM ANTENNA

4. DIGITAL AUDIO INPUT & DIGIT AL AUDIO OUTPUT

5. COMPONENT VIDEO IN & COMPONENT VIDEO OUT

6. POWER SWITCH

7. 120V / 230V VOLTAGE SELECTOR

8. RS-232

FRONT PANEL

9. AUTO TRIGGER SWITCH

10. AC POWER INLET 1 1. MS OUT (MULTISOURCE OUT)

12. IR INPUT & OUTPUT

13. DVD, SA T, VCR, VIDEO 4 & VIDEO 5

14. PRE-OUTS / SUBWOOFER OUT

15. T APE 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) 1 1. VIDEO & AUDIO

12. TAPE MONIT OR

13. DIGITAL AUDIO SELECTOR

14. EXT. 7.1

15. SURROUND MODE

16. LEVELS

17. TONE CONTROLS

18. TONE DEFEA T

19. VIDEO 6 INPUT

20. PHONES

DISASSEMBLY INSTRUCTIONS

1. Remove machine screws M4.0 x 8.0 (1 to 6) from the side panels.

Remove tapping screw 3.0 x 8.0 (7 to 10) from the back panel. Refer to Figure No. 1.

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. 2

COMPO

O BOARD

J753B

J753A

J901A

J751B

J757A

J756A

82-0426135-0

500MM

82-0226135-0

533

82-0426135-00-XX

82-0526135-01-XX

82-0326135-08-XX

300MM

82-0626135-03-XX

.5P

82-0826135-03-XX

82-0326135-06-XX

82-0116435-0

UL16

82-0116435-05-XX

UL16

82-0826135-0

36-282820

36-2028

830

36-302806

82-0526135-0

82-0118435-0

UL100

360MM

003

36-2828

82-0118435-00-XX

UL100

82-0116435-06-XX

UL100

82-0118435-00-XX

UL100

J704A

J708A

J707A

J710A

J720A

J715A

J713A

J702B

J782

J1010B

J719B

J601A

J602A

J603A

J601B

J602B

J603B

J783A

J1010A

J701

OUT

WIRING DIAGRAM

NENT

VIDE

414

MS BOAR

ABLE ASSY 5 WAY #26 2.5P UL24 L=120M

2-X

AUDIO BOAR

VIDEO BOAR

-VIDEO BOAR

WER SWIT

BOARD

FROM TRANSFORME

POWER LED BOAR

1-X

ABLE ASSY 4 WAY

#26 2.5P UL2877 L=430M

POWER SUPPL

DIGITAL BOAR

BOARD

ABLE ASSY 6 WAYS #26 2

UL2877 L=480MM W/HOUSIN

ABLE ASSY 1 WAY #1

72 BROWN L=160M

ABLE ASSY 1 WAY #1

72 BLUE L=160M

82-0426135-05-X

ABLE ASSY 4 WAYS #2

2.5P UL2468 L=400M

ABLE ASSY 5 WAYS #2

2.5P UL2468 L=150M

J1009

ABLE ASSY 3 WAYS #2

2.5P UL2854 L=250M

4-X

ABLE ASSY 8 WAYS #2

2.5P UL2877 L=450M

ABLE ASSY 4 WAY #26 2.5P UL 287 L=

ABLE ASSY 4 WAY #26 2.5P UL1 L=540M

141-71-X

FFC CABLE 28 PINS P1.2

2-X

4-X

724

J719

L=140M

1-X

ABLE ASSY 8 WAY

#26 2.5P UL2877 L=450M

-172

1-71-X

TUNE

FFC CABLE 17 PIN P1.25 UL2896 L=300M

724

717

721

J709

MAIN B

ARD

PRE-OUT BOAR

MULTI-CHANNE

714

717

ABLE ASSY 1 WAY #1

7 BLACK L=

W/RING TERMINA

2-1026135-01-X ABLE ASSY 10 WAYS #2

2.5P UL2877 L=540M

1-X

ABLE ASSY 3 WAYS #2

FROM TRANSFORME

ABLE ASSY 4 WAYS#2

2.5P UL 2877 L=200M

2.5P UL2854 L=

1-71-X FFC CABLE 30 PIN P1.25 L=60M

121-71-X

FFC CABLE 20 PIN

P1.25 L=120M

J100

DSP BOAR

ABLE ASSY 1 WAY #1

7 BLACK L=70M

W/ RING TERMINA

VIDEO 6 BOAR

ABLE ASSY 1 WAY #1

7 BLACK L=100M

W/ RING TERMINA

KEYBOAR

FFC CABLE 28 PIN

P1.25 L=200M

1-71-X

J714

J713

ABLE ASSY 1 WAY #1

7 BLACK L=100M

W/ RING TERMINA

J715

T163 WIRE DIAGRAM

ATE 16-6-2

BLOCK DIAGRAM

SPECIAL FUNCTION

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

DET AILS & W A VEFORMS ON SYSTEM TEST & DEBUGGING

T89C51RD2 (U202) main clock is at 20MHz (X202)

UPPER - OUTPUT ENABLE (pin 24) of EPROM (W27C02) when changing SURROUND MODES

LOWER - CHIP ENABLE (pin 22) of EPROM (W27C02) when changing SURROUND MODES

T89C51RD2 (U201) main clock is at 20MHz (X201)

UPPER - +5V supply to KEYBOARD when power up LOWER - RESET line (TCM810LENB713) when

power up

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.