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SYSTEM 600A SERVICE MANUAL

CONTENTS

BILL OF MATERIALS

2

TEST PROCEDURE
Introductory remarks Amplitude responses THD measurements Input level Miscellanesous Reference curves

4 4 4 5 5 5 6

DIAGRAMS
Components layout Control switches wiring diagram Power supply wiring diagram Schematics

8 8 9 9 10

1

BILL OF MATERIALS

Ref C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 D1 DB1 IC1 IC2 IC3 IC4 IC5 J0 J1 J2 L1 L2 L3 L4 L5 L6

Type Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Diode Bridge rectifier Dual OP amp Quad Op amp Quad Op amp Power Op amp Power Op amp Mains socket Connector Header Resistor Resistor Resistor Resistor Resistor Resistor

Spec 10uF 10uF 10uF 10uF 4700uF 4700uF 100nF 10uF 100nF 10uF 220pF 220pF 100nF 100nF 1nF 1nF 1nF 1nF 220pF 1nF 22uF 100nF 22uF 100nF 1.5nF 15nF 2.2nF 10nF 2.2nF 100nF 470nF 100nF 22uF 22uF 100nF 1N4148 4A OP275GP TL074CN TL074CN TDA7294V TDA7294V IEC type

Spec2 20% 20% 20% 20% 20% 20% 5% 20% 5% 20% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 20% 5% 20% 5% 5% 5% 5% 5% 5% 5% 5% 5% 20% 20% 5%

Spec3 Electrolytic radial Electrolytic radial Electrolytic radial Electrolytic radial Electrolytic radial Electrolytic radial Metallised film Electrolytic radial Metallised film Electrolytic radial Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Electrolytic radial Metallised film Electrolytic radial Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Metallised film Electrolytic radial Electrolytic radial Metallised film Vrrm = 100V

Spec4 45V 45V 25V 25V 45V 45V lp 5.08 25V lp 5.08 25V lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 16V lp 5.08 45V lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 lp 5.08 45V 16V lp 5.08 KBU402G

flange fixing NCJ6FKH HE14

with 20x5 fuse

8w - 2rows 0 Ohms 0 Ohms 0 Ohms 0 Ohms 0 Ohms 0 Ohms

2

Ref LED1 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 SW1 SW2 SW3 SW0A SW0B T1 U1 U2

Type LED Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Toggle switch Toggle switch Toggle switch Rocker switch Rotary switch Transformer Voltage regulator Voltage regulator

Spec 5mm 10k 20k 10k 30k 200R 2k2 200R 1k3 470R 15k 47k 100k 15k 6k8 8k2 220k 8k2 200k 5k6 16k 1k 16k 4k7 2k 68k n/f 15k 10k 18k 18k 18k 1k5 27k 1k 27k 12k 13k 10k 13k 2k2 SPDT SPDT SPDT cent. off DPST DPDT Toroidal LM317LZ LM337LZ

Spec2 Blue 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1%

Spec3 standard Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film Metal film 7101SHZQ 7101SHZQ 7103SHZQ Snap fit Voltage selector Dual primary

Spec4 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W 0.25W

Tannoy TI65220

3

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 Input level Number of points Acceptance limits

20 Hz - 5 kHz 1 Vrms >= 40 +/- 0.7 dB +/- 1.2 dB from 50 Hz to 1500 Hz 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 Input level Number of points Acceptance limits

600 Hz - 20000 Hz 1 Vrms >= 40 +/- 0.7 dB +/- 1.2 dB from 1500 Hz to 7000 Hz elsewhere

4

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 Input level Acceptance limits

100 Hz, 800 Hz 1 Vrms 0.1 %

2.2 HF channel
Parameters Values

Test frequencies Input level Acceptance limits

2 kHz, 10 kHz 1 Vrms 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.

5

Reference curves

Curve 1 LF channel (Half space)

Curve 2 LF channel (Free space)

Curve 3. HF channel (HF control 0 dB)

6

Curve 4 HF channel (HF control +2)

Curve 5 HF channel (HF control - 2dB)

7

DIAGRAMS

Figure 1. Components layout

8

Figure 2. Contol switches wiring diagram

Figure 3 Power supply wiring diagram

9

10

11

Tannoy Loudspeakers are manufactured in Great Britain by :
Tannoy Ltd, Rosehall Industrial Estate, Coatbridge, Strathclyde, ML5 4TF, SCOTLAND Telephone: +44 (0)1236 420199 Fax: +44 (0)1236 428230
TGI/Tannoy, 300 Gage Avenue, Kitchener, Ontario, CANADA, N2M 2C8 Telephone: (519) 745 1158 Fax: (519) 745 2364 Tannoy Nederland BV, Anthonetta Kuijlstraat 19, 3066 GS Rotterdam, THE NETHERLANDS Telephone: (010) 2860554 Fax: (010) 2860431 Tannoy is a member of the Group of Companies Issue 1 Part No. 6481 0303