SERVICE MANUAL
AM-900U
No. 00ZAM900U/SME
DIGITAL MULTIFUNCTIONAL SYSTEM
AM-900
MODEL
SHARP CORPORATION
CONTENTS
Parts marked with "
" are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications ................................................. 1-1
[2] Operation
panel.............................................. 1-2
[3] Transmittable
documents ............................... 1-3
[4] Installation ...................................................... 1-4
CHAPTER 2. ADJUSTMENTS
[1] Adjustments ................................................... 2-1
[2] Diagnostics and service soft switches............ 2-7
[3] Troubleshooting ........................................... 2-30
[4] Error code table............................................ 2-31
CHAPTER 3. MECHANICAL DESCRIPTION
[1] Mechanical
description................................... 3-1
[2] Disassembly and assembly procedures....... 3-18
CHAPTER 4. DIADRAMS
[1] Block
diagram ................................................ 4-1
[2] Wiring
diagram ............................................... 4-2
[3] Point-to-point
diagram.................................... 4-3
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Circuit
description........................................... 5-1
[2] Circuit
description
of control PWB.................. 5-1
[3] Circuit description of LIU PWB..................... 5-19
[4] Circuit description of power supply
PWB ............................................................5-21
[5] Circuit description of CIS unit ......................5-22
[6] Circuit description of operation panel
PWB ............................................................5-23
[7] Data
flow
chart.............................................5-24
[8] Troubleshooting ...........................................5-25
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] Control PWB circuit .......................................6-1
[2] LIU PWB circuit ...........................................6-14
[3] Power Supply PWB circuit...........................6-17
[4] High Voltage PWB circuit.............................6-19
[5] Operation Panel PWB circuit .......................6-22
CHAPTER 7. OPERATION FLOWCHART
[1] Protocol .........................................................7-1
[2] Power
on
sequence.......................................7-2
CHAPTER 8. OTHER
[1] Service
tools ..................................................8-1
[2] Rewriting version up the FLASH ROM ..........8-2
Parts Guide
MODEL
SELECTION CODE DESTINATION
AM-900
U
U.S.A./Canada
