Read Sony XM-7527 Service Manual online
1
MICROFILM
XM-7527
US Model
Canadian Model
AEP Model
UK Model
E Model
SPECIFICATIONS
SERVICE MANUAL
STEREO POWER AMPLIFIER
2
TABLE OF CONTENTS
1. SERVICE MODE
............................................................. 3
2. GENERAL
.......................................................................... 4
3. DISASSEMBLY
3-1. Side Plate and Bottom Plate .................................................. 7
3-2. Amplifier/Power Board and LED Board .............................. 7
3-2. Amplifier/Power Board and LED Board .............................. 7
4. ELECTRICAL ADJUSTMENT
.................................... 8
5. DIAGRAMS
5-1. Block Diagram – Amplifier Section – .................................. 9
5-2. Block Diagram – Power Section – ...................................... 10
5-3. IC Block Diagram ............................................................... 11
5-4. Printed Wiring Board – Filter/Amplifier Section – ............. 12
5-5. Schematic Diagram – Filter/Amplifier Section – ............... 13
5-6. Printed Wiring Board – Power Section – ............................ 14
5-7. Schematic Diagram/Printed Wiring Board
5-2. Block Diagram – Power Section – ...................................... 10
5-3. IC Block Diagram ............................................................... 11
5-4. Printed Wiring Board – Filter/Amplifier Section – ............. 12
5-5. Schematic Diagram – Filter/Amplifier Section – ............... 13
5-6. Printed Wiring Board – Power Section – ............................ 14
5-7. Schematic Diagram/Printed Wiring Board
– LED/Power Section – ...................................................... 15
6. EXPLODED VIEWS
6-1. Plate and Cover Section ...................................................... 16
6-2. Board and Heat Sink Section .............................................. 16
6-2. Board and Heat Sink Section .............................................. 16
7. ELECTRICAL PARTS LIST
........................................ 17
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 JW065 of the amplifier board.
Cut the jumper wire JW065 of the amplifier board.
2 When the position of the MODE switch (S801/power board)
is set to HI-CURRENT :
Cut the jumper wire JW066 of the amplifier board.
Cut the jumper wire JW066 of the amplifier board.
2. Clearing the OFF SET protector
• Cut the jumper wire JW024 of the amplifier board.
3. TEST TONE Function
1 Press the TEST TONE button (S805/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:
VR201
VR101
JW066
JW065
JW024
S805
TEST TONE
- POWER BOARD - (Component side)
- AMPLIFIER BOARD - (Component side)
S801
MODE
4
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
