Table Of Contents - Realistic PRO-2022 Service Manual

CONTENTS
Page
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Bloek Diagram
4
Principles of Operation 5
•
General Operation Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Alignment/Adjustment 9
Memory Check 16
Reception Check 17
Troubleshooting 18
Headphone Jack PCB (Top Views) 20
Headphone Jack PCB (Bottorn Views) 20
Main PCB (TOP Views) 21
Main PCB (Bottorn Views) 23
Wiring Diagram 25
Disassembly/Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 44
Semiconductor Lead Identification and IC Diagram 45
Microprocessor (IC7) Port Format 52
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Power Transformer Specification 54
Schematic Diagram 55
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special characteristics. These character-
istics aften pass unnaticed and the protectlon afforded by them cannot necessarily be obtained by
using replacement components rated for higher voltage, wattaqe, etc. Replacement parts that have
these special safety characteristics are identified in this manual and its supplements; electrical com-
ponents having such features are identified by a in the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of
substitute replacement parts that do not have the same safety characteristics as specified in the
parts list may create shock, fire or other hazards.
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