Spectrum-compatible computers «Byte»,«Byte-01» and other rarities
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PCB

Computer consists of two boards - keyboard board and main board:

Computer «Byte» main board
Computer «Byte» main board
Computer «Byte» main board

Main board photo in high quality
Main board photo in high quality
Main board photo in high quality

Computer «Byte» main board
Computer «Byte» main board
Computer «Byte» main board
Computer «Byte» main board
Computer «Byte» main board

Main board consist of several layers of conductors. On the outer layers of the board almost no conductors. In the following photo showing main board solder side. Under the top layer of the PCB slightly visible conductors:

Main board solder side
Main board solder side
Main board solder side

Computer board consists of 8 layers. Two layers - is the top and bottom boards, and 6 layers inside. You can look at the plateau near the RF encoder: the layers are numbered from 1 to 8 (the photographs RF encoder board with sealed-off for the convenience of shooting):

PCB layer numbers (from 1 to 8)
PCB layer numbers (from 1 to 8)
PCB layer numbers (from 1 to 8)
PCB layer numbers (from 1 to 8)
PCB layer numbers (from 1 to 8)

The figures are best seen when viewed through the circuit board to the light source:

The figures are best seen when viewed through the circuit board to the light source
The figures are best seen when viewed through the circuit board to the light source
The figures are best seen when viewed through the circuit board to the light source
The figures are best seen when viewed through the circuit board to the light source
The figures are best seen when viewed through the circuit board to the light source

Depending on the year of manufacture of computer circuit boards are slightly different from each other. For example, in some computers production in 1992 keyboard was connected to the mainboard with connectors. In this case, for repair the keyboard can be easily detached from the main board.

Keyboard connector
Keyboard connector
Keyboard connector

In most computers, the keyboard has been soldered to the mainboard:

Keyboard cable has been soldered to the mainboard
Keyboard cable has been soldered to the mainboard
Keyboard cable has been soldered to the mainboard

Perhaps it was done to reduce the cost of production. Additionally, with a shock and bumps could disconnect keyboard connector, so just wires soldered to the mainboard.

Board for self-assembly of the «Byte» computer

Homemade(?) computer «Byte»
Homemade(?) computer «Byte»
Homemade(?) computer «Byte»
Homemade(?) computer «Byte»
Homemade(?) computer «Byte»

Most likely, someone took this board from the factory and started soldering it themselves.

Schematics and documentation for the «Byte» computer
Technological documentation:
 ОТИБ.466214.001 РД «Byte», Repair instructionsThe manual is valid for both the «new» and «old» versions of the «Byte» computer. The manual also includes original factory schematics for both the new and old versions.
Schematics for the «new» «Byte» (with serial numbers from 7600):
 Computer schemes published in the magazine «Radio Amateur Your Computer» #7,8 1996 (not recommended for use due to numerous inaccuracies)
High-quality schematic and PCB (recommended for use) (version from June 29, 2020)
Keyboard unit (schematics and PCB)
Power supply (for computers manufactured before 1994). Schematics and PCB
EPROM DD10,DD11 time diagrams
Books, manuals:
 Book «Meet Computer Byte»This book was sold as a set with the «Byte» and «Byte-01» computers.
User manual (please note that the manual contains inaccuracies regarding the power and joystick connectors!)
«Byte Computer» Advertisement
Articles:
 Connecting BDI to the computer «Byte» (two articles from the magazine «Radio Amateur»)
Connecting computer «Byte» to TV «Horizont-519» via SCART («Radio Amateur» #9 1999)This article only describes connecting «old» «Byte» computers, as they have an inverted SYNC signal on the RGB output. More details can be found in the «Old version of the computer» section of the website.
Fixing the slowdown of «slow» memory («Radio Amateur. Your Computer» 2000, #1)
Турбирование ПК «Байт» («Радиолюбитель. Ваш компьютер» 2000, №2)
Работа с нестандартными загрузчиками (две статьи из электронных изданий «Energy» №2 и «ZX-Element» №2)
Трёхголосный синтезатор звука в «Байте» (журнал «Радиолюбитель. Ваш компьютер» 1996, №3)В статье есть ошибки в листингах программ

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