Clarion Px-3994a-a Manual
Clarion PX-3994A-A — Quick User Guide
Step 1: The Wayback Machine (Internet Archive)
Clarion’s original support site (clarion.com/us) has been rewritten. Go to archive.org. Search for http://clarion.com/us/support/manuals. Look for snapshots from 2004–2008. Navigate to "Older Models" or "Discontinued Receivers." The PX series is often grouped under "Value Line."
2. Technical Specifications
| Parameter | Value | |-----------|-------| | Supply Voltage | 10.8V–15.6V DC (typical 14.4V) | | Current Draw | 120mA (idle), 650mA (active motor drive) | | Operating Temperature | -10°C to +60°C | | Main ICs | Sanyo LA9241 (servo control), Mitsubishi M66011FP (motor driver) | | Crystal Frequency | 16.9344 MHz (for CD servo timing) | | Connectors | 12-pin flat flex (main), 4-pin JST (motor), 2-pin (power) | | Firmware | Mask ROM version 2.1 (not user-upgradable) | Clarion Px-3994a-a Manual
5. Schematic Block Diagram
[Optical Pickup] → RF Amp → LA9241 Servo → M66011FP → Motors/Coils
↓
(RFO) → Main DSP
↓
Serial Bus (SCLK/SDATA) ↔ Main µC
Note: A full schematic would require original Clarion prints. Contact Clarion Japan for service manual PN 94-3994-01. Clarion PX-3994A-A — Quick User Guide Step 1:
6.5 Sled Motor Stop Position
- Manually move pickup to inner limit (near hub).
- Adjust VR103 so sled motor stops when limit switch just triggers.