System Connector; Self-Diagnostic Function - Yamaha NS-BP300 Service Manual

A. SYSTEM CONNECTOR
This menu is used to check the SYSTEM connector without connecting the BD/DVD/CD player to this unit.
With the power to this unit turned off, short between pins No. 1 (SYS_MOSI) and No. 4 (SYS_MISO), between pins No.
2 (SYS_PL_EN) and No. 3 (SYS_RE_EN).
Note) Be sure to return the shorted pins to their original condition after executing this check.
Start up the self-diagnostic function and select this menu.
A-1. SYSTEM CONNECTOR Loop back check
System control line loop back check is executed.
A-2. SYS POW (System connector power supply detection)
The output status at 5 pin (PLAYER_S10) of the SYSTEM connector is displayed.

SYSTEM CONNECTOR

4 3
2 1
System control line loop back check
S Y S L B N G
OK
NG
Power supply control line loop back check
S Y S P O W L O W
LOW : Player undetected
HIGH : Player detected
R-840/NS-BP300
: No error detected
: An error is detected
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