Read Sony XM-7547 Service Manual online
1
MICROFILM
XM-7547
US Model
Canadian Model
AEP Model
UK Model
E Model
SPECIFICATIONS
SERVICE MANUAL
STEREO POWER AMPLIFER
2
TABLE OF CONTENTS
1. SERVICE MODE
............................................................. 3
2. GENERAL
.......................................................................... 4
3. DISASSEMBLY
3-1. Side Plate and Filer Board .................................................... 7
3-2. Amplifier/Power Board and LED Board .............................. 7
3-2. Amplifier/Power Board and LED Board .............................. 7
4. ELECTRICAL ADJUSTMENT
.................................... 7
5. DIAGRAMS
5-1. Block Diagram – Amplifier Sction – .................................... 8
5-2. Block Diagram – Power Section – ........................................ 9
5-3. IC Block Diagram ............................................................... 10
5-4. Printed Wiring Board – LED/Filter Section – ..................... 10
5-5. Schematic Diagram – Filter/Amplifier (1/3) Section – ....... 11
5-6. Printed Wiring Board – Amplifier Section – ....................... 12
5-7. Schematic Diagram – Amplifier (2/3) Section – ................. 13
5-8. Schematic Diagram
5-2. Block Diagram – Power Section – ........................................ 9
5-3. IC Block Diagram ............................................................... 10
5-4. Printed Wiring Board – LED/Filter Section – ..................... 10
5-5. Schematic Diagram – Filter/Amplifier (1/3) Section – ....... 11
5-6. Printed Wiring Board – Amplifier Section – ....................... 12
5-7. Schematic Diagram – Amplifier (2/3) Section – ................. 13
5-8. Schematic Diagram
– Power/Amplifier (3/3)/LED Section – ............................. 14
5-9. Printed Wiring Board – Power Section – ............................ 15
6. EXPLODED VIEWS
6-1. Plate and Cover Section ...................................................... 17
6-2. Board and Heat Sink ........................................................... 18
6-2. Board and Heat Sink ........................................................... 18
7. ELECTRICAL PARTS LIST
........................................ 19
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
3
SECTION 1
SERVICE NOTE
Clearing the Protector During Repairs
• OVER CURRENT : Detects overcurrent during output.
• OFF SET : Detects DC offset at the speaker terminal.
• OFF SET : Detects DC offset at the speaker terminal.
1. Clearing the OVER CURRENT protector
1 When the position of the MODE switch (S801/power board)
is set to HI-VOLTAGE :
Cut the jumper wire JW535 of the amplifier board.
Cut the jumper wire JW535 of the amplifier board.
2 When the position of the MODE switch (S801/power board)
is set to HI-CURRENT :
Cut the jumper wire JW690 of the amplifier board.
Cut the jumper wire JW690 of the amplifier board.
2. Clearing the OFF SET protector
• Cut the jumper wire JW502 of the amplifier board.
3. TEST TONE Function
1 Press the TEST TONE button (S851/amplifier board) with the
power ON. The amplifier is normal if sound is produced from
the speaker.
the speaker.
2 If no sound
: Problem causer by incorrect connecttion of the power supply
: Problem causer by incorrect connecttion of the power supply
system or sperker system.
: The signals input by the RCA cable before the amplifier system
are abnormal.
Adjustment Location:
S851
TEST
TONE
TONE
JW535
JW690
JW502
- POWER BOARD - (Component side)
- AMPLIFIER BOARD - (Component side)
S801
MODE
4
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
