Sony seq h 4900 service manual

Page 2

-- MODEL IDENTIFICATION -
(Specification Label)

SONY MODEL NO. SEQ-H4900
GRAPHIC EQUALIZER

AEP model : AC : 220 - 230V ~ 50/60Hz 40W

G, IT model : AC : 220 - 230V ~ 50Hz 40W

UK model :AC : 240V ~ 50H:

E, MX. SP, AUS model : AC : 110 -120V/220 -240V ~ 50/6on
40W

Note:

- G : German model.
IT : Italian model.
MX : Mexican model.
SP : Singapore model.
AUS : Australian model.

SERVICE NOTE

. Power Supply Used In Servicing
This unit have its own power supply as it works on the
power supplied from the amplifier (TA-H4900) used for this
series, connect this amplifier when servicing the unit
(conduction repair, etc).

Notes on chip component replacement

- Never reuse a disconnected chip component.

- Notice that the minus side of a tantalum capacitor may be
damaged by heat.

TABLE OF CONTENTS

Mia-n m BEE
1. GENERAL ............................................................... 3
2. TEST MODE ........................................................... 4
3. DIAGRAMS

3-1. Circuit Boards Location
3-2. Block Diagram .............
3-3. Semiconductor Lead Layouts .......
3-4. Printed Wiring Boards - Main Section -
3-5. Schematic Diagram - Main Section .
3»6. Schematic Diagram - Panel/Power Section -
37, Printed Wiring Boards - Panel/Power Section -
3-8. IC Pin Functions

- ICSOI System Control (HD6433288A21P) ..

' |C701 FL/LED Driver (M38122M2-062FP

4. EXPLODED VIEW
4-1. Main Section ...................................................................... 27

5. ELECTRICAL PARTS LIST ................................... 28

SAFETY-RELATED COMPONENT WARNING I!

COMPONENTS IDENTIFIED BY MARK A OR DOTTED

LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE

OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BV SONY.