Nad 306 Service Manual

Page 1

NAD 306

MODEL

SERVICE MANUAL

Page 2

PAGE CONTENTS

3 REAR/FRONT PANEL LAYOUT
4 SPECIFICATIONS
5 DISASSEMBLY INSTRUCTION
6 ALIGNMENT METHOD
.7 - 8 MAIN AMPLIFIER. RECTIFIER F'CB LAYOUT
9 PREAMPLIFIER PCB LAYOUT
1O EQUALIZER PCB LAYOUT
11 HEADPHONE. LED. SPEAKER, JACK PCB LAYOUT
12 POWER SUPPLY. VOLUME. SWITCH PCB LAYOUT
13 -14 POWER AMPLIFIER SCHEMATIC DIAGRAM
15 - 16 PREAMPLIFIER SCHEMATIC DIAGRAM
17 TRANSISTOR LEAD IDENTIFICATION
17 ~ 18 IC IDENTIFICATION AND INTERNAL CIRCUITRY
19 - 22 WIRING DIAGRAM
23 - 25 ELECTRICAL PARTS LIST
26 - 29 EXPLODED VIEW
30 EXPLODED PARTS LIST
31 PACKING DIAGRAM

SERVICE SAFETY PRECAUTIONS (UL)
1. Use exact replacement parts Ior critical locations. marked A.
2. Return lead dress to original position. and re-install protective covers.
3. BeIore returning to customer. test lor shock hazard; use either method A or B:
A. Leakage test. cold".
1. Unplug AC cord; turn power switch ON.
2. Connect one lead of High Voltage Insulation Tester to both prongs 01 AC plug.
3. Touch other lead to all exposed metal parts.
4. Impedance measurement must be 0.3-5.0 Megohms.
B Leakage test "live'
. Plug unit directly into AC outlet, do not use isolation transformer
. Connect one lead of Leakage Current Tester to earth ground
. Touch other lead to all exposed metal parts,
. Leakage measurement must be less than 0,5 milliamps.

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REAR PANEL

1. MC Input.
, MM Input
MC/MM Selector.
Tape 1 Input.
Tape 1 Output,
Tape 2 Input.
Tape 2 Output.
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. Soft Clipping On/Ott.
. Speakers A.
. AC Outlet.(AH)

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12. AC Line Cord.

13. Speakers B.

14. Bridging On/OII.
15, Main Amp Input.
16. Pre Amp Output 2.
17. Pre Amp Output 1.
18. Tuner Input.

19. Aux Input.

20. Video Sound Input.
21. CD Input.

22. Phone Ground.

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FRONT PANEL

. Power.

. Phones.
Bass.

. Tone Defeat.
. Treble.

. Balance.

, High Gain.

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8. Mono.

9. Bass Equalizer
10. Extra Speakers.

11. Tape Copy.
12. Record Output Selector.
13. Tape Monitor.

14. Listen Input Selector.
15. Volume.

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