Service Mode; Check Item - Sony RDR-HX520 Service Manual

This is the diagnostics to locate cause of fault.
The diagnostics can be executed using the remote commander and a monitor.
To enter the service mode, connect the VIDEO OUT connector of the main unit to the monitor. While pressing the "A" (Open/Close) button
and the "G" (PLAY) button at the same time, connect the AC power cord to the power outlet. (Keep pressing the above buttons until a
message, "WELCOME" appears on the display panel of the main unit.)
While the diagnostics is in progress, either "OK" or "NG" appears on the monitor screen to enable the judgment whether the respective
devices or the peripheral are normal or have any abnormality.
When an abnormality is detected, the diagnostics is stopped at that moment and you can select to keep running the diagnostics or to stop it.

6-1. Check Item

Checking item IC name
EEPROM IC M24C32-WMN6T
VIDEO DEC IC TVP5147M1PFP
DDR IC K4H511638C-UCB3T
DDR IC K4H511638C-UCB3T
All parts are mounted on the RD-060 board.
For IC301, only AEP3 is used.
All manuals and user guides at all-guides.com
SECTION 6

SERVICE MODE

REF
IC102
IC301
IC105
IC106
6-1
RDR-HX520/HX525/HX720/HX722/
HX725/HX727/HX920/HX925
When NG is displayed as the result of the DEVICE TEST, the IC or
its peripheral is defective.