Describe what you need
Share the location, the issue and any photographs or specifications that help explain the job.
CIRCUIT & CORE
LAB OPEN 11.40 JST
We open it,
find the thing,
solder it back.
Circuit & Core is a small lab in a basement on Chuo-dori. We repair what other people throw away — phones, laptops, motherboards, vintage hi-fi, broken-thumb-drives — at the chip and trace level. Every job is logged, photographed and explained.
12,840boards repaired
94.2%first-pass success
48hmedian turnaround
▌ Live bench · Station 03● capturing
▌ Pair 01 / Display assemblies ▌
Screen
refits, OLED
and glass.
Cracked panels, dead pixels, ghosting, blacks-with-tint, ambient-light failures and the lot. We use OEM panels on Apple and Samsung flagships, OEM-equivalent on everything else, and we tell you which you're getting on the work order.
- iPhone 12 → 16 OLED replacements · ProMotion preserved
- iPad Pro 11″ / 12.9″ digitiser + LCD
- Samsung Galaxy S20 → S25 AMOLED swaps
- Pixel 6 → 9 OLED refits
- MacBook Pro 14″ / 16″ LCD assemblies
from
¥18,400
↳ same-day · 4 hours
▌ Exploded view · iPhone 15 Pro assemblySHEET D-01
PARTS USEDOEM Apple panel
SEALIP-rated re-gasket
WARRANTY180 days
▌ Pair 02 / Board-level repair ▌
Component
level fixes,
down to the trace.
We work under microscope at 30× — reflowing BGAs, replacing power-management ICs, bridging broken traces, rebuilding pads. Most "logic board failures" are one bad component; we find which one, replace it, and you keep the rest of the device.
- iPhone & iPad logic board repair
- MacBook T2 / Apple Silicon board work
- PS5 / Xbox Series X HDMI & APU reflow
- PCI-e & M.2 NVMe storage controllers
- Vintage motherboard rework (1980 →)
from
¥32,000
↳ 48 – 96 hours
▌ Board map · iPhone X J5800 regionSHEET D-02
MICROSCOPE30× stereo
HOT-AIRQuick 861DW
SUCCESS94.2% pass
▌ Pair 03 / Data recovery ▌
Drives that
won't mount.
Failed SSDs, dead HDDs, water-damaged phones, encrypted volumes whose keys went down with the device. We work in a class-10,000 clean cabinet for platter drives and at chip level for NAND. We tell you within 48 hours whether the data is recoverable, before any meter is run.
- Conventional HDD · head & platter
- SSD & M.2 NVMe · controller swap, chip-off
- Phone NAND chip-off + JTAG
- Water / fire damaged storage
- RAID 0 / 5 / 10 reconstruction
assessment
¥8,000
↳ 48h answer, no fix no fee on assessment
▌ Recovery flow · SSD chip-offSHEET D-03
CLEAN-ROOMClass 10,000
TOOLSPC-3000 · UFS-Box
SECRECYEncrypted handoff
▌ Pair 04 / Vintage & hi-fi ▌
Old gear,
back from the dead.
Reel-to-reels, dead Marantz receivers, broken cassette decks, vintage synths and arcade boards. We recap, rebelt, retubeS and rewire — and we ship anywhere in Japan with insured carriage.
- Marantz · Sansui · Pioneer · McIntosh receivers
- Reel-to-reel (Studer, Revox, Akai)
- Roland / Yamaha synth recap & voltage
- CRT arcade monitors (Wells-Gardner)
- Vintage CD players (Philips TDA1541)
from
¥24,000
↳ 1 – 3 weeks
▌ Schematic · Marantz 2270 power sectionSHEET D-04
RECAP KITNichicon / Panasonic
BIASRe-set on bench
RETURNInsured Yamato
▌ Pair 05 / Bring it in ▌
Drop it off,
or send it in.
Walk-in Mon–Sat from 11.00. For postal repairs, fill the form below; we send a pre-paid Yamato label and a sealed sleeve within 24 hours of confirmation.
Lab address
2-14-3 SotokandaAkihabara · Chiyoda · TokyoHours
Mon – Sat11.00 – 20.00 JSTTelephone
+81 3 3258 0094Postal repairs
send@circuit-core.jpA closer look / Circuit & Core
Keep good things working.
Note the device model, symptoms and whether protecting stored data is a priority.
Describe the faultA straightforward process
Clear expectations. Careful work.
Agree the scope
Review the proposed work, access requirements and estimate before the appointment is confirmed.
Know what comes next
Ask for a clear handover, care instructions and any follow-up that the work requires.
Good to knowA few things
A few things
you might ask.
What information helps with an estimate?
A short description, location, photographs and relevant model numbers or measurements help the team assess the work.
Is the online estimate a final quote?
An estimate is a starting point. The provider should confirm scope, materials, access and pricing before work is authorised.
How do I prepare for an appointment?
Confirm access, timing and any preparation with the team. Keep relevant documents and details of the issue available.
The next step
Describe the fault.
Note the device model, symptoms and whether protecting stored data is a priority.