Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Initial Inspection and Diagnostic Overview

1. Check all data line wiring (CKT 835) for an open or short to ground.
2. Check all serial data component connectors for proper terminal contact (CKT 835 terminal[S]) beginning with the suspect component.
3. Check all serial data components ground wiring for high resistance caused by poor terminal contact, Frayed wires etc.
4. Check all serial data components, beginning with suspect component.