K-TRONIX ELECTRONICS REPAIR
Vintage Audio · Restoration · Service · www.ktronixrepair.com
Combined Repair Invoice
Unit 1 — Pioneer RT-707 Reel-to-Reel
Repair Summary: Diagnosed and eliminated channel hiss; replaced faulty small-signal transistor on microphone input board (left channel); cleaned all tape-path rollers and guides; lubricated moving mechanical assemblies; verified transport operation and audio performance; verified VU meter operation and responsiveness.
| Description | Price |
|---|---|
| Diagnostic & Signal Path Noise Isolation | $89.00 |
| Replace Noisy Transistor (Mic Input Board) | $35.00 |
| Mechanical Service: Roller Cleaning & Lubrication | $45.00 |
| Functional Testing & Verification | $40.00 |
| RT-707 Subtotal | $209.00 |
| Bench / Diagnostic Credit | - $59.00 |
| RT-707 Total | $150.00 |
Unit 2 — Marantz 2250B Receiver
Repair Summary: Full control service; all knobs cleaned; pushbutton switches fully disassembled and cleaned; replaced dial indicator backlight bulb; complete internal cleaning (dust, residue, debris removal); verified proper operation after service.
| Description | Price |
|---|---|
| Full Control & Switch Service (Disassembly & Cleaning) | $120.00 |
| Dial Indicator Backlight Replacement (Parts & Labor) | $25.00 |
| Internal Cleaning & Inspection | $45.00 |
| Functional Testing & Verification | $40.00 |
| Marantz 2250B Subtotal | $230.00 |
| Bench / Diagnostic Credit | - $59.00 |
| Marantz 2250B Total | $171.00 |
Invoice Summary
| Description | Amount |
|---|---|
| Pioneer RT-707 Total | $150.00 |
| Marantz 2250B Total | $171.00 |
| Total Due | $321.00 |
Notes
Both units have been serviced and verified to be operating properly. The RT-707 hiss issue has been resolved, and transport and metering are functioning correctly. The Marantz 2250B has received a full control service and internal cleaning, with new dial illumination installed. Bench / diagnostic fees previously paid have been credited toward the final repair total for each unit.
K-Tronix Electronics Repair · Billings / Molt, Montana
www.ktronixrepair.com