CROMEMCO Repair Services India
CROMEMCO was a pioneering American manufacturer of S-100 bus computers and industrial control systems, particularly known for their Z80-based single-board computers and memory modules used in process automation and data acquisition throughout the 1980s and 1990s. Though the company ceased active manufacturing decades ago, thousands of CROMEMCO systems remain operational in Indian textile mills, chemical plants, and legacy manufacturing facilities where downtime is not an option.
CROMEMCO was a pioneering American manufacturer of S-100 bus computers and industrial control systems, particularly known for their Z80-based single-board computers and memory modules used in process automation and data acquisition throughout the 1980s and 1990s. Though the company ceased active manufacturing decades ago, thousands of CROMEMCO systems remain operational in Indian textile mills, chemical plants, and legacy manufacturing facilities where downtime is not an option.
Synchronics Electronics specializes in restoring and maintaining CROMEMCO legacy equipment, recognizing the critical role these systems play in continuous-process industries across India. Our engineering team possesses deep expertise in CROMEMCO S-100 architecture, ROM/RAM module repair, serial I/O card diagnostics, and replacement of obsolete components. We repair all CROMEMCO industrial electronics including single-board computers, memory expansion units, I/O controllers, and power supplies — keeping your mission-critical legacy systems running reliably.
Deep expertise in CROMEMCO S-100 legacy system restoration and component-level repair.
CROMEMCO Product Lines We Repair
Our engineers are trained on the full CROMEMCO product range. Below are the major product families we service.
S-100 Single-Board Computers
CROMEMCO's flagship Z80-based single-board computers (including 4FDC, CDCV, and Cromix-based models) used for process monitoring and real-time control. Common issues include RAM bit failure, ROM checksum errors, and address bus failures due to corroded edge connectors.
Memory Expansion Modules
CROMEMCO RAM and ROM expansion cards (16KB, 32KB, 64KB variants) using obsolete chip types and fragile edge-connector design. Failures include memory bit dropout, parity check errors, and intermittent address decoding faults from oxidized connectors.
Serial and Parallel I/O Controllers
CROMEMCO multi-channel serial (RS-232/422) and parallel (Centronics) I/O cards used for sensor input, alarm output, and device communication. Typical faults include RS-232 level-shifter IC failure, UART chip degradation, and connector pin corrosion.
Floppy and Hard Disk Controllers
CROMEMCO WD1002 and FDC-based storage controllers supporting legacy floppy drives and early hard disks. Common failures: controller ROM corruption, DMA timing circuit degradation, and motor control transistor failure.
Power Supply Units
CROMEMCO linear power supplies delivering +12V, -12V, +5V, and -5V for S-100 bus systems. Frequent faults: electrolytic capacitor drying (age-related), pass transistor thermal runaway, and voltage regulation IC failure.
Why Choose Synchronics for CROMEMCO Repairs?
PCB-Level Expertise
We repair down to the component level — not just swap boards. Our engineers identify root causes, replace failed IGBTs, capacitors, processors, and gate drivers on CROMEMCO equipment.
Fast Turnaround
Standard 7–10 working days. Express 3–5 days available for critical breakdowns. Emergency same-day/next-day service for unplanned downtime.
6-Month Warranty
Every repaired unit ships with a 6-month comprehensive warranty on parts and labour. Our repair success rate is over 94% across all brands.
All-India Service
Couriered repairs accepted from any city in India. Doorstep pickup available in Vadodara, Mumbai, Pune, Ahmedabad, Surat, Chennai, and more.
Common CROMEMCO Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in CROMEMCO equipment arriving at our workshop.
- ✓CROMEMCO S-100 edge connector oxidation and bit dropout — CROMEMCO's edge-connector design is susceptible to tarnish and corrosion in humid Indian manufacturing environments, causing intermittent electrical contact loss and random bit errors in data transmission and memory access, especially in coastal and high-humidity facilities.
- ✓ROM checksum error and program code corruption — CROMEMCO EPROM and ROM chips manufactured in the 1980s-90s experience gradual data degradation due to UV exposure, temperature cycling, and bit-decay inherent to older non-volatile memory technology. Systems running continuously show cumulative error accumulation.
- ✓CROMEMCO RAM memory parity check failure and system halt — CROMEMCO memory modules use 16-bit or 32-bit RAM chips with parity checking; aging 4164 and 4116 DRAM chips commonly fail individually, generating parity mismatch errors and forcing system shutdown rather than allowing graceful degradation.
- ✓Serial I/O UART character transmission errors and data loss — CROMEMCO 16450 and 6850 UART chips degrade with age, causing intermittent framing errors, stop-bit loss, and parity violations. Baud-rate clock circuits also drift, resulting in garbled sensor data and failed device handshakes in Indian textile and process control applications.
- ✓CROMEMCO power supply output voltage drift and shutdown — Electrolytic capacitors in CROMEMCO linear supplies dry out over 30+ years, reducing capacitance and increasing ESR. Zener-based voltage regulators and pass transistors fail from cumulative thermal stress, causing soft shutdowns and brownouts in sensitive control loops.
- ✓CROMEMCO floppy/hard disk controller DMA timing and data corruption — CROMEMCO WD1002 and FDC controllers use legacy DMA timing circuits and clock multipliers that drift out of tolerance with age. Degraded capacitors in timing networks cause missed data bytes, sector errors, and complete loss of disk access.
How We Repair Your CROMEMCO Unit
Receive & Log
Your unit is logged into our tracking system with a unique job number. You receive WhatsApp / email updates at every stage.
Fault Diagnosis
Board-level diagnosis using oscilloscopes, LCR meters, and thermal cameras. Root cause identified before any repair begins.
Component Repair
Faulty ICs, capacitors, MOSFETs, IGBTs, and gate drivers replaced with genuine or equivalent-spec components.
Full-Load Test
Unit tested under rated load with original or equivalent motor. All parameters verified. 6-month warranty issued.
Industries Using CROMEMCO Equipment
We serve plant maintenance teams across all major industries where CROMEMCO automation is deployed.
Frequently Asked Questions — CROMEMCO Repairs
Do you repair CROMEMCO equipment anywhere in India?+
Yes. Synchronics repairs the full CROMEMCO legacy product range — single-board computers, memory expansion modules, serial/parallel I/O cards, disk controllers, and power supplies. We offer PAN India door pickup from Mumbai, Delhi, Pune, Chennai, Hyderabad, Ahmedabad, and all other major industrial centers. Repair is performed at our fully equipped facility in Vadodara, Gujarat, with 180+ engineers experienced in vintage S-100 architecture.
Can Synchronics repair CROMEMCO S-100 cards that are 35+ years old?+
Absolutely. CROMEMCO S-100 systems deployed in Indian textile mills and chemical plants often run continuously for three decades or more. Synchronics specializes in component-level restoration of aging CROMEMCO cards using period-correct replacement ICs, recapped power supplies, and refurbished edge connectors. We understand the critical mission of these legacy systems and prioritize reliability over speed.
What CROMEMCO firmware and operating systems does Synchronics support?+
Synchronics maintains expertise in CROMEMCO Cromix OS, CP/M operating systems, and proprietary real-time control firmware used in Indian industrial applications. We can restore corrupted ROM images, reprogram EPROM modules with original code, and troubleshoot boot failures. If original firmware is lost, we work with your plant engineering team to recover or recreate control logic.
How much does CROMEMCO repair cost versus buying modern replacement equipment?+
CROMEMCO repair through Synchronics costs a fraction of replacing legacy systems. A single industrial controller replacement can exceed 10-15 lakhs, while CROMEMCO card repair typically runs 5,000 to 25,000 rupees depending on component failure. For mission-critical sugar mills, textile plants, and chemical processors, keeping proven CROMEMCO systems running is both cost-effective and operationally safer than wholesale replacement.
Does Synchronics offer warranty on CROMEMCO repairs?+
Yes. All CROMEMCO repairs come with a 12-month parts and labor warranty. We provide detailed test reports showing all functional parameters before shipment, and maintain spare cards and modules for rapid warranty service. Many customers maintain backup CROMEMCO cards at Synchronics for overnight courier replacement if field failure occurs.
How do I send my CROMEMCO unit for repair?+
Pack the unit securely and courier it to our Vadodara workshop. Include a note with the fault description and your contact details. We will log it into our system and WhatsApp you a job number within 24 hours of receipt. Doorstep pickup is available in Vadodara, Ahmedabad, Surat, Mumbai, and Pune.
What is the cost of repairing a CROMEMCO drive or PLC?+
Repair cost depends on the model and the fault. We offer a free diagnosis — once we identify the fault, we provide a fixed quotation before proceeding. Typical repairs cost 20–40% of the new unit price. We will never repair without your approval.
What warranty do you provide on CROMEMCO repairs?+
All repaired units carry a 6-month comprehensive warranty covering the same fault and related issues. If the fault recurs within the warranty period, we repair it free of cost.
Do you provide a no-fix, no-fee guarantee?+
Yes. If we cannot repair your CROMEMCO unit after diagnosis, you pay only the diagnosis fee (₹500–₹1,500 depending on the product). The unit is returned to you at no additional charge.
CROMEMCO Repair Catalog
No products found for CROMEMCO
Don't See Your CROMEMCO Model Listed?
We repair the full range of CROMEMCO industrial electronics — even if the specific model is not yet in our catalog. Send us the unit details and we'll confirm repairability within 24 hours.
Free evaluation • 6-month warranty • PAN India pickup
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Back in Action — Fast
Send us your faulty industrial electronics. Our engineers will diagnose it and provide a detailed quote within 24 hours — with no obligation to proceed.
Free Evaluation
No obligation
48hr Turnaround
Fastest in India
6-Month Warranty
Every repair
No Fix, No Charge
Zero risk policy
Pan-India Pickup
Doorstep service