Goldstar S30238-K87842X-3-X501 Circuit Board

Goldstar S30238-K87842X-3-X501 is a legacy plug-in circuit board designed by Goldstar (now LG Electronics), likely used in telecom switching or industrial control systems. The part belongs to a proprietary board family used in backplane-based rack assemblies, common in the late 1980s and early 1990s.

Board Manufacturer: Goldstar Co., Ltd. (now LG Electronics)
Model Number: S30238-K87842X-3-X501
Country of Origin: South Korea
Board Function: DRAM memory expansion or buffer board for telecom/industrial systems
Visible Memory Chips: 16 × KM44C256AJ-8 DRAM (256K x 4-bit) = 2MB total (4MB if configured as 8-bit banks)
Component Types: DRAM, relays, discrete logic, diodes, transistors, signal protection elements
Relay Count: 12 sealed electromagnetic relays (likely signal switching or isolation)
Board Interface: Gold-finger edge connector (for backplane/rack slot)
PCB Construction: Multilayer, through-hole dominant
Power Input: Via backplane connector (likely 5V DC)
Mounting: Vertical plug-in to rack chassis
Use Case: Central office telecom systems, exchange processors, memory buffering or routing control

If used in a telecom system, this board would typically support switching matrix control, data path buffering, or relay state management in conjunction with other CPU or I/O cards. Please review pictures carefully and let us know if you have any questions!