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HF-17247


PROJECT: HF-17247
DESCRIPTION: RICOH A0965140M PRINTER mainboard
TYPE: A0965140M
BRAND: RICOH
STATUS: n
PROJECT START DATE: 2017
LOCALISATION: DD
DOCUMENTATION: B-8 p.34 (PCB drawings)
PCB: TPD57247
DIMENSIONS:

CPU CATALOG NUMBER: UC-306
CPU: UPD78P322
CPU BRAND: NEC
FAMILY: 78K3 (16b/8b)
ROM: 16K
RAM: 256
MAX CLOCK: 16 MHz
THN ADDRESS: 0xBB
TYPE: 0x57


Project Info

Microprocessor is configured on internal memory, but it can be extended to external memory too. I have partly reconstructed circuit diagram in my notebook B-8 page 34.
Modifications of this particular module can be difficult because it is densly populated with electronic components, for that reason no works has been undertaken yet, but it is planned for future.


Components:
COMPONENTDESCRIPTIONREMARKS
2SK811Transistor
7402TTL
7407TTL 6 x INV
7474TTL
74153TTL
74157TTL
74373TTL LATCH
93C46SPI EEPROM
J142Transistor
M662404-CH 16-BIT PWM GENERATOR
MB89255PARALLEL DATA I/O INTERFACE
NJM2902Low power quad op amps
TA78L006Regulator
TD62308Driver
UPD78P322uC



Sources:
[1] UPD78P322 datasheet
[2] 78K3 (16b)
[3] M66240 datasheet


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