Nad T 955 Service Manual

Page 2

CONTENTS

FRONT PANEL/REAR PANEL VIEW ............................................. 3
SPECIFICATIONS ............................................................. 4
ALIGNMENT PROCEDURE/ALIGNMENT POINTS ................................ 5
WIRING DIAGRAM ............................................................ 6
SCHEMATIC DIAGRAM ..................................................... 7-12
PCB LAYOUT ............................................................. 13-19
ELECTRICAL PARTS LIST ................................................. 20-33
EXPLODED VIEW ......................................................... 34-36
EXPLODED VIEW PARTS LIST ................................................ 37
PACKING DIAGRAM ......................................................... 38

SERVICE SAFETY PRECAUTIONS

1. Replacing the Fuses

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

REFERENCE NO. PART NUMBER DESCRIPTION
Rear Panel

AH A 20-12153-10 MDAT15AL/25OV
C A 20-12702-20 MDA T7AL/250V
POWER SUPPLY Board

F201---F220 A 20-12632-00 T6.3AL/250V
NOTE:

*AH : North American version only
*C : European version only

2. Safety-check out (North American model only)

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 A are critical with regard to the risk of fire and
electric shock.Replace only parts recommended by the manufacturer.

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ELECTRICAL PARTS LIST

DESIGNATO DESCRIPTION PART TYPE PART NUMBER FOOTPRINT
R1E6 Metal Film Resistor 1megO, 1/6W, 5% 072010550 AX/.200X.080/.031
R1E7 Metal Film Resistor 350, 1w, 1% 072360901 AXI.600X.125/.039
R1E8 Metal Film Resistor 2.2m, 1/6W, 5% 072022250 AXI.200X.080/.031
R1E9 Metal Film Resistor 1megO, 1/6W, 5% 072010550 AX/.200X.080/.031
R1F1 Metal Film Resistor 910m, 1/6W, 5% 072091450 AXI.200X.080/.031
R1G1 Metal Oxide Film Resistor 1000, 2w, 5% 075010105 AXI.600X.125/.039
R1H0 Metal Film Resistor 22m, new, 5% 072022350 AXI.200X.080/.031
R1H1 Metal Film Resistor 10K0, new, 5% 072010350 AXI.200X.080/.031
R1 H3 Metal Film Resistor 3.3m, 1/6W, 5% 072033250 AXI.200X.080/.031
R1 H4 Metal Film Resistor 1.5KQ, 1/6W, 5% 072015250 AXI.200X.080/.031
R1 H5 Metal Film Resistor 470m, 1/6W, 5% 072047450 AXI.200X.080/.031
R1 H6 Metal Oxide Film Resistor 8200, 2w, 5% 07»30821-02 AXI.800X.200/.037
R1 H7 Metal Film Resistor 220m, 1/6W, 5% 072022450 AXI.200X.080/.031
R1 H8 Metal Oxide Film Resistor 3.9m, 1w, 5% 073039201 AXI.600X.125/.039
R1 H9 Metal Film Resistor 22m, new, 5% 072022350 AXI.200X.080/.031
R1K1 Metal Film Resistor 47KQ, new, 1% 072470250 AXI.200X.080/.031
R1K2 Metal Film Resistor 100m, 1/6W, 1% 072100350 AXI.200X.080/.031
R1K3 Metal Film Resistor 2.2m, 1/8W, 5% 072022250 AXI.200X.080/.031
R1K4 Metal Film Resistor 470, MW, 5% 072047051 AXI.400X.100/.031
R1K5 Metal Film Resistor 470, MW, 5% 072047051 AX/.400X.100/.031
R1X1 Metal Film Resistor 1.8KQ, 1/8W, 5% 072018250 AX/.200X.080/.031
R1X2 Metal Film Resistor 2.2m, 1/8W, 5% 072022250 AX/.200X.080/.031
R1X3 Metal Film Resistor 2.2m, 1/8W, 5% 072022250 AX/.200X.080/.031
R1X4 Metal Film Resistor 6.8KQ, 1/8W, 1% 07-26801-50 AX/.200X.080/.031
R1X5 Metal Film Resistor 1K0, 1/5w, 1% 072100150 AX/.200X.080/.031
R1X6 Metal Film Resistor 16K0, 1/5W, 1% 07-21602-50 AX/.200X.080/.031
R1X7 Metal Film Resistor 10m, 1/5W, 1% 072100250 AX/.200X.080/.031
R1X8 Metal Film Resistor 33m, 1/5W, 5% 072033350 AX/.200X.080/.031
R1Y1 Metal Film Resistor 220m, 1/5w, 5% 072022450 AX/.200X.080/.031

CAPACTIOR
0101 ALL: Electrolytic Capacitor 220uF/63V, 20%, 105c 06-22161-01 CPCYL1/D.400lLS.200/.031
0102 ALL: Electrolytic Capacitor 220uF/63V, 20%, 105c 06-22161-01 CPCYL1/D.400lLS.200/.031
0103 ALL: Electrolytic Capacitor 220uF/25V, 20%, 105c 06-22121-03 CPCYL1/D.300lLS.200/.031
0104 ALL: Electrolytic Capacitor 220uF/25V, 20%, 105c 06-22121-03 CPCYL1/D.300lLS.200/.031
c105 Ceramic Capacitor 22oF, 10%, 1KV 05-22013-00 CPAX/.200X.100/.032
C106 Ceramic Capacitor 22oF, 10%, 1KV 05-22013-00 CPAX/.200X.100/.032
0107 ALL: Electrolytic Capacitor 47uF/25V, 20%, 105c 06-47021-01 CPCYL1/D.200lLS.200/.031
C108 ALL: Electrolytic Capacitor 47uF/25V, 20%, 105c 06-47021-01 CPCYL1/D.200lLS.200/.031
0109 ALL: Electrolytic Capacitor 47uF/25V, 20%, 105c 06-47021-01 CPCYL1/D.200lLS.200/.031
0110 ALL: Electrolytic Capacitor 47uF/25V, 20%, 105c 06-47021-01 CPCYL1/D.200lLS.200/.031
0111 ALL: Electrolytic Capacitor 1uF/50V, 20%, 105c 06-10951-03 CPCYLID.200/LS.200/.031
0112 ALL: Electrolytic Capacitor 1uF/50V, 20%, 105c 06-10951-03 CPCYLID.200/LS.200/.031
0113 ALL: Electrolytic Capacitor 1uF/50V, 20%, 105c 06-10951-03 CPCYLID.200/LS.200/.031
0114 ALL: Electrolytic Capacitor 1uF/50V, 20%, 105c 06-10951-03 CPCYLID.200/LS.200/.031
C115 B"p°'azed ALU 220uFl10V, 20%, 105c 06-22111-13 CYL/D.300/LS.200/.031

Electrolytic Capacitor

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