2
TABLE OF CONTENTS
1. SERVICE MODE
............................................................. 3
2. GENERAL
.......................................................................... 4
3. DISASSEMBLY
3-1. Side Plate, Sub 1/Sub 2 and Filer Board ............................... 7
3-2. Amplifier/Power Board and LED Board .............................. 7
4. ELECTRICAL ADJUSTMENT
.................................... 7
5. DIAGRAMS
5-1. Block Diagram – Amplifier Section – .................................. 8
5-2. Block Diagram – Power Section – ........................................ 9
5-3. Block Diagram – Sub 1/Sub 2 Section – ............................ 10
5-4. IC Block Diagrams ............................................................. 10
5-5. Printed Wiring Board –Filter/Sub 1/Sub 2 Section – .......... 11
5-6. Printed Wiring Board –Amplifier Section – ....................... 12
5-7. Schematic Diagram
–Amplifier(1/3)/Filter/Sub 1/Sub 2 Section – ..................... 13
5-8. Schematic Diagram/Printed Wiring Board
–Amplifier (2/3)/LED/TR Section – ................................... 14
5-9. Printed Wiring Board –Power Section – ............................. 15
5-10. Schematic Diagram
–Power/Amplifier (3/3)/TR/LED Section – ....................... 17
6. EXPLODED VIEWS
6-1. Plate and Cover Section ...................................................... 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
damaged by heat.
Summary of Contents for XM-7557 Primary
Page 4: ...4 SECTION 2 GENERAL This section is extracted from instruction manual ...
Page 5: ...5 ...
Page 6: ...6 ...
Page 30: ...30 XM 7557 MEMO ...
