JVC 340 SC - Manual (Page 145)

Chapter 5---Troubleshooting
5-5 Model 330, 340SC, and 370SC Service Manual
5.3 Break Points
Break Points (or Trap Processing) handle internal interrupts generated by the
processor, such as: bus errors, illegal instruction, and divide by zero commands.
Perform the following steps to setup for break codes (trap processing):
1. Access MAIN MENU and select #4 (DIAGNOSTICS MENU).
2. Select #7—this is an invisible menu item.
3. Press ENTER to clear the displayed break (trap) data.
When a break (trap) occurs, the CPU stops normal operation and outputs a code to
the LED located at the rear of the projector. The code consists of the character “e”
followed by a “2” through “C.” The error code displays in a continuous loop.
Error codes and explanations are provided in Table 5-3.
Table 5-3 Break Point (Trap Processing) Error Codes
Code Meaning Description
2 Bus error. Probably electrical noise.
3 Address error. Noise or program bug.
4 Illegal instruction. Noise or program bug.
5 Zero divide. Program bug.
6 CHK instruction. Unlikely—may be a bug.
7 TRAPV instruction. Unlikely—may be a bug.
8 Privilege violation. Bug.
9 Trace. Noise.
A Line 1010 emulator. Noise.
B Line 1111 emulator. Noise.
C Spurious interrupt. Hardware.