EPSON Stylus Pro 4400/4450/4800/4880/4880C Revision C
Disassembly & Assembly Disassembly Procedures 208
4.2.1.2  Carriage Unit Lock Release/Lock Set Method
CARRIAGE UNIT LOCK RELEASE
1. Open "Cover, Printer".
2. Push in "Holder, Solenoid" to release carriage lock.
(Refer to Figure 4-4.)
CARRIAGE UNIT LOCK SET
1. Move "Carriage Unit" to the right until you hear a clicking sound to lock the 
"Carriage Unit". (Refer to Figure 4-5.)
Figure 4-4. Carriage Unit Lock Release
Figure 4-5. Carriage Unit Lock Set
Holder, Solenoid