AMSTRAD PC1512 - User Manual

I
PC1512
PERSONAL
COMPUTER
PC-MM
MONOCHROME MONITOR
PC-CM
COLOUR
MONITOR
SERVICE MANUAL

Summary

Safety Note

Technical Specification

Safety Test

FD-3 Service Information

General

General overview of floppy disk drive servicing requirements.

Special Jigs, Tools and Measuring Instruments

Lists necessary tools and instruments for floppy disk drive repair.

Diagnosis Procedure

General Diagnosis

Discusses common causes of drive failures and error detection.

Soft Error Detection and Correction

Explains soft errors and their recovery methods.

Write Error Handling

Procedure for diagnosing and resolving write errors.

Read Error Handling

Discusses how to recover data from read errors.

Seek Error Diagnosis

Identifies causes and recovery for seek errors.

Compatibility Error Causes

Reasons for data incompatibility between drives.

Test Points List

Lists diagnostic test points and their signal names.

Parts Exchange

Printed Circuit Board Exchange

Procedures for removing and mounting the PCB.

Lever Exchange

Steps for removing and mounting the lever mechanism.

Front Plate Exchange

Instructions for replacing the front plate.

Eject Assembly Exchange

Steps for removing and mounting the eject assembly.

Lever Frame Assembly Exchange

Stepping Motor Assembly Exchange

Head Assembly Exchange

Spindle Motor Assembly Exchange

0 Track Sensor Assembly Exchange

Metal Belt Exchange

Adjustments and Checks

Spindle Speed Adjustment

Procedure for adjusting spindle motor speed.

Radial Track Adjustment

Steps for adjusting the radial track alignment.

0 Track Sensor Adjustment

Azimuth Check

Index Burst Time Adjustment

Level Check

Resolution Check

Symmetry Check

Write Protect Sensor Check

Head Cleaning

Hard Disc Installation Instructions

Operating System Selection

Options for booting DOS Plus or MS-DOS after installation.

Alignment Instructions for PC-CM

Setting +5 V Supply

Procedure to set the +5V power supply level.

Setting +12 V Supply

Procedure to set the +12V power supply level.

Setting -5 V Supply

Procedure to set the -5V power supply level.

Setting -12 V Supply

Procedure to set the -12V power supply level.

Protect Adjustment

Procedure to adjust the protection circuit.

Vertical Size Setting

Adjustment of the vertical size on the monitor screen.

Sub Brightness Control

Adjusting the monitor's brightness control.

Sub Contrast Control

Adjusting the monitor's contrast control.

Sub Horizontal Hold Control

Procedure for adjusting horizontal hold.

Alignment Instructions for PC-MM

Setting +5 V Supply (PC-MM)

Procedure to set the +5V power supply level.

Setting +12 V Supply (PC-MM)

Procedure to set the +12V power supply level.

Setting -5 V Supply (PC-MM)

Procedure to set the -5V power supply level.

Setting -12 V Supply (PC-MM)

Procedure to set the -12V power supply level.

Protect Adjustment (PC-MM)

Procedure to adjust the protection circuit.

Setting +12 V for Monitor

Procedure to set +12V for the monitor.

Screen Centering

Steps for centering the display on the screen.

Vertical Size Control

Adjusting the vertical size of the screen display.

Vertical Linearity Adjustment

Procedure for adjusting vertical linearity.

Cut Off Adjustment

Steps for adjusting the screen cutoff.

Sub Contrast Adjustment (PC-MM)

Adjusting the monitor's sub-contrast.

Alignment Instructions for PC1512

Real Time Clock (RTC) Setting

Procedure for setting the Real Time Clock.

AMSTRAD PC1512 Specifications

General

Processor	Intel 8086
Clock Speed	8 MHz
Operating System	MS-DOS 3.2
Case Type	Desktop
RAM	512 KB
Storage	360 KB floppy disk drive
Graphics	CGA
Ports	Parallel, Serial, Joystick