JVC 250 service manual Troubleshooting

			Chapter 7---Troubleshooting
	1.34	“No mem available”	Software error-no heap available for memory
			allocation.
	2.1	“Invalid Sector”	Software error-invalid Flash sector number.
2.2		“Write Timeout”	Flash Memory Write Failure.
2.3		“Erase Timeout”	Flash Memory Erase Sector Failure.
2.4		“Verify Error”	Flash Memory Write Verify Failure.

NOTE: Category 3 error codes may occur when power is interrupted by opening the cover interlock switches or during power brown-outs.

3.1	“Pin Timeout”	IIC Slave HW protocol error-possible on each
		byte transfer.
3.2	“BB Timeout”	IIC Slave HW protocol error-1st error possible
		on Read or Write.
3.3	“No Slave Ack”	IIC Slave HW protocol error-missing
		acknowledgement on byte transfer. NOTE: This
		error occurs if the slave is missing. During
		Power On, this error is reported in the POWER
		category.
4.1	“CD PCA Missing”	“No Slave Ack” on first poll of Convergence/
		Deflection PCB.
4.2	“CD PCA Not OK”	/CD_OK is high (BAD).
4.3	“”HVD PCA Missing”	“No Slave Ack” status on first poll of
		Horizontal/Vertical Deflection PCB.
4.4	“HVD PCA Not OK”	HVD_OK is High (BAD)-[/HVD_OK requires
		RTG Timing.
4.5	“VA PCA Missing”	“No Slave Ack” status on first poll of Video
		Processor.
4.6	“VA PCA Not OK”	/VA_OK is High (BAD).
4.7	“VP PCA Missing”	“No Slave Ack” status on first poll of VP.
4.8	“VP PCA Not OK”	VP_OK is High (BAD)
4.9	“RTG PCA Missing”	“No Slave Ack” status on first poll of RTG
4.10	“RTG PCA Not OK”	RTG_OK is High (BAD)
4.14	“Lamp Startup”	Lamp Failed to light (/LAMP_LIT_B not Low
		for 3 seconds out of 20 seconds.)
4.15	“Low Voltage PS”	Low Voltage PS failed (/LV_OK_B is High).
4.16	“High Voltage PS”	High Voltage PS failed (/HV_OK_B is High).

Model 250 Service Manual 7-23