Tannoy System 600 Service manual

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Page 1

SYSTEM 600A

SERVICE MANUAL

Page 2

CONTENTS

BILL OF MATERIALS 2

TEST PROCEDURE 4

Introductory remarks 4 Amplitude responses 4 THD measurements 5 Input level 5 Miscellanesous 5 Reference curves 6

DIAGRAMS 8

Components layout 8 Control switches wiring diagram 9 Power supply wiring diagram 9 Schematics 10

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BILL OF MATERIALS

Ref Type Spec Spec2 Spec3 Spec4

C1 Capacitor 10uF 20% Electrolytic radial 45V C2 Capacitor 10uF 20% Electrolytic radial 45V C3 Capacitor 10uF 20% Electrolytic radial 25V C4 Capacitor 10uF 20% Electrolytic radial 25V C5 Capacitor 4700uF 20% Electrolytic radial 45V C6 Capacitor 4700uF 20% Electrolytic radial 45V C7 Capacitor 100nF 5% Metallised film lp 5.08 C8 Capacitor 10uF 20% Electrolytic radial 25V C9 Capacitor 100nF 5% Metallised film lp 5.08 C10 Capacitor 10uF 20% Electrolytic radial 25V C11 Capacitor 220pF 5% Metallised film lp 5.08 C12 Capacitor 220pF 5% Metallised film lp 5.08 C13 Capacitor 100nF 5% Metallised film lp 5.08 C14 Capacitor 100nF 5% Metallised film lp 5.08 C15 Capacitor 1nF 5% Metallised film lp 5.08 C16 Capacitor 1nF 5% Metallised film lp 5.08 C17 Capacitor 1nF 5% Metallised film lp 5.08 C18 Capacitor 1nF 5% Metallised film lp 5.08 C19 Capacitor 220pF 5% Metallised film lp 5.08 C20 Capacitor 1nF 5% Metallised film lp 5.08 C21 Capacitor 22uF 20% Electrolytic radial 16V C22 Capacitor 100nF 5% Metallised film lp 5.08 C23 Capacitor 22uF 20% Electrolytic radial 45V C24 Capacitor 100nF 5% Metallised film lp 5.08 C26 Capacitor 1.5nF 5% Metallised film lp 5.08 C27 Capacitor 15nF 5% Metallised film lp 5.08 C28 Capacitor 2.2nF 5% Metallised film lp 5.08 C29 Capacitor 10nF 5% Metallised film lp 5.08 C30 Capacitor 2.2nF 5% Metallised film lp 5.08 C31 Capacitor 100nF 5% Metallised film lp 5.08 C32 Capacitor 470nF 5% Metallised film lp 5.08 C33 Capacitor 100nF 5% Metallised film lp 5.08 C34 Capacitor 22uF 20% Electrolytic radial 45V C35 Capacitor 22uF 20% Electrolytic radial 16V C36 Capacitor 100nF 5% Metallised film lp 5.08 D1 Diode 1N4148 DB1 Bridge rectifier 4A Vrrm = 100V KBU402G IC1 Dual OP amp OP275GP IC2 Quad Op amp TL074CN IC3 Quad Op amp TL074CN IC4 Power Op amp TDA7294V IC5 Power Op amp TDA7294V J0 Mains socket IEC type flange fixing with 20x5

fuse J1 Connector NCJ6FKH J2 Header 8w - 2rows HE14 L1 Resistor 0 Ohms L2 Resistor 0 Ohms L3 Resistor 0 Ohms L4 Resistor 0 Ohms L5 Resistor 0 Ohms L6 Resistor 0 Ohms

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Ref Type Spec Spec2 Spec3 Spec4

LED1 LED 5mm Blue standard R1 Resistor 10k 1% Metal film 0.25W R2 Resistor 20k 1% Metal film 0.25W R3 Resistor 10k 1% Metal film 0.25W R4 Resistor 30k 1% Metal film 0.25W R5 Resistor 200R 1% Metal film 0.25W R6 Resistor 2k2 1% Metal film 0.25W R7 Resistor 200R 1% Metal film 0.25W R8 Resistor 1k3 1% Metal film 0.25W R9 Resistor 470R 1% Metal film 0.25W R10 Resistor 15k 1% Metal film 0.25W R11 Resistor 47k 1% Metal film 0.25W R12 Resistor 100k 1% Metal film 0.25W R13 Resistor 15k 1% Metal film 0.25W R14 Resistor 6k8 1% Metal film 0.25W R15 Resistor 8k2 1% Metal film 0.25W R16 Resistor 220k 1% Metal film 0.25W R17 Resistor 8k2 1% Metal film 0.25W R18 Resistor 200k 1% Metal film 0.25W R19 Resistor 5k6 1% Metal film 0.25W R20 Resistor 16k 1% Metal film 0.25W R21 Resistor 1k 1% Metal film 0.25W R22 Resistor 16k 1% Metal film 0.25W R23 Resistor 4k7 1% Metal film 0.25W R24 Resistor 2k 1% Metal film 0.25W R25 Resistor 68k 1% Metal film 0.25W R26 Resistor n/f R27 Resistor 15k 1% Metal film 0.25W R28 Resistor 10k 1% Metal film 0.25W R29 Resistor 18k 1% Metal film 0.25W R30 Resistor 18k 1% Metal film 0.25W R31 Resistor 18k 1% Metal film 0.25W R32 Resistor 1k5 1% Metal film 0.25W R33 Resistor 27k 1% Metal film 0.25W R34 Resistor 1k 1% Metal film 0.25W R35 Resistor 27k 1% Metal film 0.25W R36 Resistor 12k 1% Metal film 0.25W R37 Resistor 13k 1% Metal film 0.25W R38 Resistor 10k 1% Metal film 0.25W R39 Resistor 13k 1% Metal film 0.25W R40 Resistor 2k2 1% Metal film 0.25W SW1 Toggle switch SPDT 7101SHZQ SW2 Toggle switch SPDT 7101SHZQ SW3 Toggle switch SPDT cent.

off SW0A Rocker switch DPST Snap fit SW0B Rotary switch DPDT Voltage selector T1 Transformer Toroidal Dual primary Tannoy TI-

U1 Voltage

regulator

U2 Voltage

regulator

LM317LZ

LM337LZ

7103SHZQ

65220

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TEST PROCEDURE

Introductory remarks

• the input should be connected to a balanced generator, pin 2 = hot, pin 3 = cold, pin 1 =

ground

• the measured signal should be taken alternatively at the LF and HF outputs, with a

balanced connection to the analyser : LF output is between the brown (+) and blue (-) leads, HF output between yellow (+) and green (-) leads. Note that the minus return to ground.

• both LF and HF outputs should be loaded with an 8 Ohm power resistor (rating >= 25

Watts).

• there are 3 switches which affect the responses. Unless stated otherwise, they are

intended to be in their “normal” position, defined as : * INPUT LEVEL : + 4dBu * LF CONTROL : Half space * HF CONTROL : 0

• on the attached curves, the Y co-ordinate is in dB that is, it is an actual gain. Therefore it

is also the value one would get (in dBV) at the output if 1Vrms is applied at the input.

Amplitude responses

1.1 LF channel (curve 1)

Parameters Values

Start / stop frequencies 20 Hz - 5 kHz Input level 1 Vrms Number of points >= 40 Acceptance limits +/- 0.7 dB from 50 Hz to 1500 Hz

+/- 1.2 dB elsewhere

1.2 LF channel, LF CONTOUR set to “Free space” (curve 2)

Parameters Values

same as test 1.1

1.3 HF channel (see curve 3)

Parameters Values

Start / stop frequencies 600 Hz - 20000 Hz Input level 1 Vrms Number of points >= 40 Acceptance limits +/- 0.7 dB from 1500 Hz to 7000 Hz

+/- 1.2 dB elsewhere

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1.4 HF channel, HF CONTROL set to “+2” (curve 4)

same as 1.3

1.5 HF channel, HF CONTROL set to “-2” (curve 5)

same as 1.3

THD measurements

2.1 LF channel

Parameters Values

Test frequencies 100 Hz, 800 Hz Input level 1 Vrms Acceptance limits 0.1 %

2.2 HF channel

Parameters Values

Test frequencies 2 kHz, 10 kHz Input level 1 Vrms Acceptance limits 0.1 %

Input level

Taking a single test frequency (e.g. 500 Hz), the difference in level at the LF output between the two positions of the switch should be 11.7 dB +/- 0.5 dB. Note that for this test the input level should be reduced to 0.3 Vrms.

Miscalleneous

Visual check of the LED.

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