NAD t187 service manual

DRAFT DATE: MAY 2012

NAD

SERVICE MANUAL

T 187

AV Surround Sound Preamp Processor

T 187

AV Surround Sound Preamp Processor

SAFETY INFORMATION

HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.DFDF

2

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 Database Part Number Description

F8001*AH 1601100002-902000 FUSE 5*20MM TIME-LAG 1.6A 250V “ROHS” “WALTER” TSD 1.6A 250V

F8001*C

TSD1A250V F8002*AH 1601100003-902000 FUSE 5*20MM TIME-LAG 1A 250V “ROHS” “WALTER”

TSD1A250V F8002*C 1601100005-902000 FUSE 5*20MM TIME-LAG 500MA 250VAC TSD UL/CSA/

VDE/CCC “ROHS” “WALTER” TSD500MA250V F8003 1601100006-902000 FUSE TIME-LAG 800MA 250VAC 5X20MM TSD UL/CSA/

VDE/CCC WALTER (ROHS) F8401 1601100005-902000 FUSE 5*20MM TIME-LAG 500MA 250VAC TSD UL/CSA/

VDE/CCC “ROHS” “WALTER” TSD500MA250V

NOTE:

<*AH > : USA CANADIAN MODEL ONLY.

1601100003-902000 FUSE 5*20MM TIME-LAG 1A 250V “ROHS” “WALTER”

Parts marked with the symbol are critical with regard to the risk of ﬁre and electric shock.

CONTENTS

DESCRIPTION PAGE

SPECIFICATIONS ..............................................................................................................................4 - 6

REAR PANEL / FRONT PANEL VIEW ...................................................................................................7

DISASSEMBLY INSTRUCTIONS ...........................................................................................................8

WIRING DIAGRAM .............................................................................................................. ..................9

WIRING PARTS LIST ......................................................................................................... ..................10

BLOCK DIAGRAM.................................................................................................................................11

SPECIAL KEYS .....................................................................................................................................12

DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING ..................................................13 - 19

PCB LAYOUT .................................................................................................................................20 - 37

SCHEMATIC DIAGRAM .................................................................................................................38 - 51

ELECTRICAL PARTS LIST ............................................................................................................52 - 63

IC BLOCK DIAGRAM .....................................................................................................................64 - 75

EXPLODED VIEW .........................................................................................................................76a-76b

EXPLODED VIEW PARTS LIST ....................................................................................................77 - 78

PACKING DIAGRAM .............................................................................................................................79

PACKING PARTS LIST .........................................................................................................................80

.........................................................................................................................

APPENDIX 1 .........................................................................................................................................81

APPENDIX 2 ..................................................................................................................................82 - 84

3

4

SPECIFICATIONS

PRE AMPLIFIER SECTION

Rated distortion (Ext 7.1 1kHz 500mV input ,Pre-out 1V with 30kHz LPF, FL/C/FR) ≤ 0.1 % (Ext 7.1 1kHz 500mV input ,Pre-out 1V with 30kHz LPF, SL/SR/BL/BR) ≤ 0.1 %

S/N Ratio (Ext 7.1 1kHz 500mV input ,Pre-out 1V with A-WTD, 1kΩ termination, ≥ - 85 dB

FL/C/FR/SL/SR/BL/BR) 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 2V Pre-out, 100 Hz) ≤ 0.5 % (S/N at 2V Pre-out, 100 Hz) ≥ 70 dB (Min. Vol. hum. 47 kΩ w/o lter) ≥ -56 dBV (Ext. 7.1 in 6 CH A-wtd) ≥ -65 dBV Crosstalk (500 mV input, ref @ 1V out, 1 kHz) ≥ -60 dB

Controls

Bass (at 500 mV in, ref @ 1V out, 100 Hz) ± 10 dB ± 2 Treble (at 500 mV in, ref @ 1V out, 100 Hz) ± 10 dB ± 2 Dialog (Vol. set at ± 6 dB, 2 kHz) ± 4 dB ± 1

DOLBY DIGITAL SECTION

Channel Difference (FL ref. Track 30) ± 1.2 dB

Frequency Resporse at Dolby cong.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 (1 V, Audio LPF, Dolby Cong 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 (31 for 100mV @ Pre-out, Track 35) CCIR / ARM ≥ 65 dB Audio LPF ≥ 70 dB A-wtd ≥ 70 dB

DOLBY PRO LOGIC II SECTION

Frequency Response

I/P mode : L, R : 1 V in, 1V @ Pre-out, Ch L/R 40 Hz 0 ± 2.0 dB 20 kHz 0 ± 2.0 dB I/P mode : L=R : 1 V in, 1V @ Pre-out, 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, 1V @ Pre-out, Ch SL/SR 40 Hz 0 ± 2.0 dB 20 kHz 0 ± 2.0 dB

S/N Ratio (200 mV in, 100mV @ Pre-out, A-WTD w/ 1 kΩ 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, 100mV @ Pre-out, w/ 80 kHz LPF, 1kHz) ≤ 0.2 % MAX VOL PLII Music mode, 1kHz, 1Vp-p, CD in, ≥ 40 dB NOISE connect to T787 Ext 7.1, measure at T787 Spk out, with ref. to 1W S/N (L,R,C,SL,SR)

DTS SECTION

Output Level (Vol 0 dB) : FL/FR/C/SL/SR Track 6 1 kHz 200 ± 10 mV Channel Difference (FL ref) : FL/FR/C/SL/SR Track 6 1 kHz 0 ± 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 0 +2/-1.5 dB Subwoofer Output Level 1 kHz ref at pre-out (FL) Play Track 10 charge to 15 12.5 ± 1.5 dB

NOISE MEASUREMENT

Surround mode noise (Preout) DVD input 1V (L 20-20kHz -72 dB only), volume @ -12 dB, Enhanced Stereo 1 mode, A-WTD -75 dB 100mV Preout output reference Surround mode noise (Subwoofer out) DVD input 1V 20-20kHz -75 dB (L only), volume @ -12 dB, Enhanced Stereo 1 A-WTD -78 dB mode, 1V Preout output reference Surround mode noise (Preout) DVD input 1V (L 20-20kHz -48 dB only), maximum volume, Enhanced Stereo 1 mode, A-WTD -50 dB 100mV Preout output reference Surround mode noise (Subwoofer out) DVD input 1V 20-20kHz -67 dB (L only), maximum volume @ -12dB, Enhanced A-WTD -72 dB Stereo 1 mode, 1V Preout output reference

AM TUNER SECTION

Input level is expressed as the reading in open circuit of 75-ohm source impedance signal generator Usable sensitivity (1008 kHz) ≤ 55 dBμV S/N Ratio (5 mV in) ≥ 38 dB THD (5 mV in) ≤ 3 % IF Rejection (603 kHz) ≥ 40 dB Image Rejection (1404 kHz) ≥ 48 dB Selectivity (999 or 1017 kHz)≥ 23 dB Output (1008 kHz) 230 -30/+60 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 - 1.8 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 (98.1 MHz) ≤ 9 dBμ ≤ 9 dBμv S/N Ratio (60 dB, IHF wtd) Mono ≥ 65 dB ≥ 65 dB Stereo ≥ 55 dB ≥ 55 dB Frequency Response (20 Hz - 15 kHz, 60 dBμ) 0 ± 3 dB 0 ± 3 dB Channel Separation (60 dBμ) 100 Hz ≥ 30 dB ≥ 30 dB 1 k ≥ 30 dB ≥ 30 dB 10 kHz ≥ 20 dB ≥ 20 dB AM Suppression (60 dBμ, 100% Mod. FM, 30% Mod. AM) ≥ 40 dB ≥ 40 dB Image Rejection (106.1 MHz) − ≥ 75 dB

5

I.F. Rejection (90.1 MHz) ≥ 75 dB − THD (60 dBμ, L=R 75 kHz for AH, 40 kHz Dev for C) Mono ≤ 0.7 % ≤ 0.7 % Stereo ≤ 0.1 % ≤ 0.1 % Auto-Search Sensitivity On ≥ 24 dBμ ≥ 24 dBμ Off ≤ 15 dBμ ≤ 15 dBμ RDS decode Sensitivity ≤ 33 dBμ − Output level (98.1 MHz) 600 ± 100 mV 600 ± 100 mV

PHYSICAL SPECIFICATIONS

Dimensions (Width x Height x Depth) 435 x 150 x 385 mm (Gross)* Net Weight 9.6 kg Shipping Weight 13.5 kg

* Gross dimension includes feet, volume knob and extended rear panel terminals.

6

REAR PANEL / FRONT PANEL VIEW

REAR PANEL

1 2 3 4 5 6

LR

R

7.1 CH INPUT

AUDIO 6 AUDIO 5

L

AUDIO

VIDEO

S-VIDEO

1. 7.1 CHANNEL INPUT

2. AUDIO PRE-OUT

3. FM/AM ANTENNA TERMINAL

4. XM MODULE INPUT (120V version model only)

DAB MODULE INPUT (230V version model only)

SUBW

R L

CENTERSURR-BSURRFRONT

OUT AUDIO 4 IN

ZONE 4 ZONE 3 ZONE 2

OUT AUDIO 3 IN AUDIO 2 AUDIO 1 ZONE 2

YP

B PR

IN

Y3 2 1PB PR

YPB PR

32

YPB PR

SUBW 2

SUBW 1 CENTERSURR-BSURRFRONT

AUDIO

PRE-OUT

VIDEO

1

OUT

MONITOR

230V VERSION ONLY

DAB

ANTENNA

FM GND AM

HDMI IN 6 HDMI IN 5

HDMI

HDMI IN 3

32

AUDIO

DIGITAL

XM

ETHERNET

HDMI IN 4

HDMI IN 2 HDMI IN 1 HDMI OUT 2 HDMI OUT 1

13 2 1

COAXIAL OPTICAL

MP

DOCK

14 17

7 8 9

RS-232

DATA PORT

OUT

+12V TRIGGER

1510 12 13

16

OUT 1 OUT 2

INOUT 3OUT 2OUT 1IN OUT 3

POWER

ON

SWITCHED

AC OUTLET 120V ~ 60Hz

120W 1A MAX

SWITCHED

AC OUTLET 230V ~ 50Hz 120W 0.5A MAX

230V VERSION ONLY

5. ETHERNET/LOCAL AREA NET WORK (LAN) PORT

6. MP DOCK

7. RS 232

8. +12V TRIGGER OUT / IN

9. IR IN/IR OUT

10. AUDIO 1-6/VIDEO 1-3/S-VIDEO 1-3 AUDIO 3-4 OUT

11. ZONE 2-3-4

12. COMPONENT VIDEO INPUT 1-3 COMPONENT VIDEO OUT

13. HDMI (HDMI IN 1-6 HDMI OUT 1-2)

14. DIGITAL AUDIO (COAXIAL 1-3 OPTICAL 1-3)

DIGITAL AUDIO OUT (OP TICAL COAXIAL)

15. AC MAINS INPUT

16. SWITCHED AC OUTLET

17. POWER

FRONT PANEL

1 2 3

AV Surround Sound Preamp Processor T 187

d

f

1. STANDBY BUTTON

2. STANDBY LED

3. NAVIGATION and ENTER BUTTONS

4. REMOTE SENSOR

4 5 6 7

VOLUME

MEMORY

sa

INFO

DELETE

AM/FM/DB TUNER MODE LISTEN MODE TONE TONE DEFEAT FRONT INPUT/MP

NAD T187

a SOURCE s

A B C ED

12 13 14 15 1611

5. VACUUM FLUORESCENT DISPLAY (VFD)

6. SOURCE

7. VOLUME

8. PHONES

9. MEMORY

10. INFO

11. AM/FM/DB

12. TUNER MODE

13. LISTEN MODE

17

181098

14. TONE

15. TONE DEFEAT

16. FRONT INPUT/MP

17. FRONT INPUT PORTS

18. FRONT MP/MIC INPUT

7

DISASSEMBLY INSTRUCTIONS

1. Remove machine screws M4.0 x 8.0 (x 6pcs) from the side panels. Remove tapping screw 3.0 x 8.0 (x 3pcs) from the back panel. Refer to Figure No. 1.

Figure No. 1

2. Pull both sides of the TOP COVER slightly outwards and tilt approx. 35 ° and then remove in the direction as indicated. Refer to Figure No. 2.

Figure No. 2

8

WIRING DIAGRAM

9

WIRING DIAGRAM PARTS LIST

Item Database Part Number Description Remark

1 0600100367-902000 CABLE ASSY UL1007 AWG26 5PIN 2.5P L=400mm PSU BD-J8002A “ROHS” 2 0600100153-902000 CABLE ASSY UL1672 AWG16 1PIN BLUE L=140mm PSU BD-J8011A FASTON 4.8mm “ROHS” 3 0600100154-902000 CABLE ASSY UL1672 AWG16 1PIN BROWN L=140mm PSU BD-J8012A FASTON 4.8mm “ROHS” 4 0600100150-902000 CABLE ASSY UL2854 AWG26 3PIN 2.5P L=110 “ROHS” VOLUME BD-

J6004C 5 0600100323-902000 CABLE ASSY UL2468 AWG26x1C 7PIN 2.5P L=240mm VOLUME BD “ROHS” J2016A 6 0600100392-902000 CABLE ASSY UL1007 AWG26 3PIN 2.5P L=230mm PCU BD-J8004A WHT/BLK “ROHS” 7 0600100321-902000 CABLE ASSY UL1007 AWG24 2PIN 2.5P L=220mm PCU BD-J8003A “ROHS” 8 0600100189-902000 CABLE ASSY UL2651 AWG28 20PIN L=120mm PCB KEY BD-J2002A MOUNT “ROHS” 9 0600100067-902000 CABLE ASSY UL1533 AWG26 6PIN 2.5P L=200mm F-INPUT BD “ROHS” J2006A 10 0600100132-902000 CABLE ASSY UL1007 AWG26 6PIN 2.5P L=150mm F-INPUT BD “ROHS” J2005A 11 0600100146-902000 CABLE ASSY UL2854 AWG26 3PIN 2.5P L=310 “ROHS” CONN#1-J9006A 12 06001000147-902000 CABLE ASSY UL2854/1533 AWG26 5PIN 2.5P CONN#1 L=230/320 “ROHS” J9004A/J9005A 13 0600100158-902000 CABLE ASSY UL2854 AWG26 3PIN 2.5P L=230mm CONN#1 “ROHS” J9008A/B 14 0600100352-902000 CABLE ASSY UL1007 AWG18 2PIN 3.96P L=220mm PSU BD-J9009A “ROHS” 15 0600100148-902000 CABLE ASSY UL1007 AWG18 1PIN L=320MM W/ CONN#1 HEADER “ROHS” JP9001A 16 0610100014-902000 CABLE ASSY FFC 11 PINS P1.25 L=280mm “ROHS” TUNER-J6003A 17 0600100032-902000 CABLE ASSY UL1015 AWG16 1PIN GREEN/YELLOW 1-CHASSIS L=100mm “ROHS” GND 1-AC

OUTLET GND 18 0610100013-902000 CABLE ASSY FFC 19 PINS P0.5 L=400mm VM150X HDMI BLACK/ WHITE “ROHS” BD-J204 19 0600100356-902000 CABLE ASSY UL1007 AWG28 3PIN 2.5P L=370mm F-HDMI BD “ROHS” J9401A 20 0600100162-902000 CABLE ASSY UL1672 AWG18 1PIN BLUE L=80mm 1-INLET/PSU “ROHS” BD 1-OUTLET/

PSU BD 21 0600100163-902000 CABLE ASSY UL1672 AWG18 1PIN BROWN L=80mm 1-INLET/PSU “ROHS” BD 1-OUTLET/

PSU BD 22 0600100165-902000 CABLE ASSY UL2651 AWG28 26PIN L=450mm “ROHS” TRIGGER MCU

BD-J2301C 23 0600100148-902000 CABLE ASSY UL1007 AWG18 1PIN L=320MM W/ DSP BD-J11 HEADER “ROHS” 24 0601000366-902000 CABLE ASSY UL1007 AWG18 1PIN BLACK L=150mm F-INPUT BD W/ RING “ROHS” END

10

BLOCK DIAGRAM

11

SPECIAL KEYS

Function

Keys

Notes

Factory Reset Source Down + Front/MP Toggle IR Channel Source Down + Power System Info Source Down + Source Up MIC Test Source Down + Tone Defeat VFD Test Source Down + Display PAL/NTSC Source Down + Memory 9k/10k Source Up + Tuner Band Must reselect AM before change takes effect. XM 1kHz Test Tone Tuner Band + Tuner Mode XM must be selected first. XM Signal Strength Tuner Mode for 0.5 seconds XM must be selected first. XM Diagnostics Mode Tuner Mode for 3 seconds XM must be selected first. Check DAB Module Version Tuner Mode for 3 seconds DAB must be selected first. Enter Diagnostics Mode Source Down + Enter Diagnostic Mode Down Source Down + Cursor Right Diagnostic Mode Up Source Down + Cursor Left Power Off All Zones Power Toggle or Power Off for 3

seconds

12