Sony SRS-T77 Service manual
SRS-T77
SERVICE MANUAL
Ver 1.0 2001.02
SPECIFICATIONS
Amplifier section
• Power output: 2 W + 2 W
• Input: Speaker cord with stereo miniplug (50 cm)
• Input impedance: 4.7 kilohms (at 1 kHz)
Speaker section
• System: Full-range, bass reflex type
• Speaker units: Magnetically shielded ø 39 mm
• Impedance: 8 ohms
• Rated input power: 2 W
• Maximum input power: 4 W
General
• Power requirement: Four R6 (size AA) batteries/DC 9 V
• Battery life (at TOTAL 10 mW output):
Approx. 24 hours Sony alkaline batteries LR6 (SG)
Approx. 8 hours Sony manganese batteries R6P (SR)
• Dimensions: Approx. 221 × 127 × 117 mm (8
5
4
/8 in.) (w/h/d) (during use)
Approx. 143 × 127 × 29 mm (5
(w/h/d) (folded)
• Mass: Approx. 260 g (9 oz.) not incl. batteries Approx.
350 g (12 oz.) incl. batteries
• Supplied accessories: AC power adaptor
AC- E90A (1), Carrying case (1), Plug adaptor (1)*
*For world model only.
Design and specifications are subject to change without
notice.
3
/4 × 5 × 1 3/16 in.)
3
/4 × 5 ×
US Model
Canadian Model
Tourist Model
Features
•The Sony SRS-T77 is a compact (CD case-sized) speaker
system with a built-in power amplifier. This system can be
connected to a Discman, WALKMAN*, headphone
stereo, etc.
•The SRS-T77 has a dual power supply system. When you
operate the SRS-T77 outdoors, use battery power, and
when you operate it indoors, use an AC power adaptor
(supplied).
Rich and powerful bass
•Power output of 2 W + 2 W
•The embedded MEGA BASS delivers rich bass regardless
of the sound volume.
*WALKMAN is a registered trademark of Sony
Corporation.
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.
Note on the AC power adaptor
Use only the AC-E90A (supplied) AC power adaptor.
Do not use any other AC power adaptor.
Polarity of the plug
9-927-993-11 Sony Corporation
2001B0500-1 Audio Entertainment Group
C 2001.2 General Engineering Dept.
ACTIVE SPEAKER SYSTEM
SRS-T77
• LOCATION OF CONTROL
SECTION 1
GENERAL
This section is extracted from
instruction manual.
Left speaker
POWER indicator
Bass reflex duct
POWER switch
Right speaker
Stand
Speaker cord
2
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SRS-T77
SECTION 2
DISASSEMBLY
Set
Note: Follow the disassembly procedure in the numerical order given.
Case, Front
Speaker unit (SP1) (L ch)/(SP2) (R ch)
AMP board, Jack board
Draw Around Lead Wires
2-2. CASE, FRONT
3
six screws
(P2.6
×
10)
5
case, front
A
2
lid, battery case
4
screw
(P2
×
5)
1
Open stand
in the direction of arrow
A
.
3
Loading...