Early
Electronic
Calculator		 Microlith Memory 4 / 113G Calculator

Manufacturer: Microlith
Model: Memory 4 / 113G
Year: 1976
Form: Pocket
Functions: Basic four, constant, memory, %, square root
Number of Digits: 8
Display Type: VFM
Display:itron FG95AI
Logic Technology: LSI
Diodes: 2
Transistors: 2
IC Complement:Rockwell A5901 CA
Batteries: 9V
Power Connector:9 VDC, + tip, sub-mini audio
Tech. Data Level: 2
Tech. Data Source: RE
Tech. Data Pages: 1
Tech. Data:Schematic (pdf)

- Unit Log -

Serial Number: (not specified)
Year of Manufacture: 1976 (IC stamped with 7615.)
Accessories: With slip-style carrying case.
Date of Receipt: 13 Mar 2001
Source: PM second-hand store.
State upon Receipt: Good physical condition. Slightly bouncy/intermittent keyboard, otherwise fully functional. Marked with 702... SIN.
Current State: Fully functional (13 Mar 2001).

Date: 13 Mar 2001
Procedure: Cleaned.

- Unit Log -

Serial Number: (not specified)
Year of Manufacture: 1976 (IC stamped with 7615.)
Date of Receipt: 02 May 2001
Source: Broadway & Alma SPCA.
State upon Receipt: Good physical condition. Missing front 2 tiny rubber feet. Non-functional.
Current State: Fully functional (15 Mar 2002).

Date: 03 May 2001
Procedure: Cleaned.

Date: 15 Mar 2002
Symptoms: No display.
Analysis: Broken lead-wire on power supply switching transformer. The transformer on these units was not always secured to the PCB, leaving the lead-wires to take the strain.
Solution: Transformer rewound.


  Microlith Memory 4 / 113G
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