Phaser 7500 Printer Service Manual 3-187
Error Messages and Codes
LPH PLL Lock Fail C
LPH PLL lock mechanism failure.
Applicable Chain-Link Code
• 061-388: LPH PLL Lock Fail C
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ LPH Unit (C), PL2.1.2
■ LPH Cable Assy, PL2.2.1
■ LPH Rear PWB (C), PL2.2.5
■ MCU PWB, PL18.3.6
Troubleshooting Procedure
Step Actions and Questions Yes No
1 Check the Fault History.
Check whether 061-356 LPH 
Download Fail Y has occurred.
Has error 061-356 occurred?
Go to 
“LPH Download 
Data Fail C” on 
page 3-155 
(error code 
061-356).
Replace the
following parts 
in sequence:
■ LPH Unit (C) 
(REP 2.1, 
page 8-18)
■ LPH Cable 
Assembly
■ LPH Rear 
PWB (C) 
(REP 2.4, 
page 8-22)
■ MCU PWB 
(REP 18.12, 
page 8-202)