JVC AV-32S565 Series Service Manual page 43

5.1.6 DETAILS
Self-diagnosis is performed for the following items:
Check Item Indication
X-ray protection XRAY
B1 over-current OCP
protection
Low B short protection LOB
CRT neck protection
Timer (clock) TIM
Presence or absence SYNC
of synchronized
signal
Main memory MEM
AV switch AVSW
Video process VCD
Audio AIO
3D YC separation YC
RF tuner TUN
Multi screen PP
DIST process IP
DVI (Digital input) HDMI
process
5.1.7 DISPLAY METHOD WHEN RASTER IS NOT AVAILABLE
The self-check results are shown on the following LED display.
Method of indication when the raster is not displayed.
Each failure is shown by turning LED on and off at the specified
intervals.
• For B1 over-current protection, CRT neck protection and Low
B short protection, the power of the TV is turned off, if NG is
detected. Immediately after the power is turned off, POWER
LED will be turning on and off. When the power is turned off,
you cannot turn the power on again until the AC plug is taken
out and put in again.
1-42 (No.YA093)
Details of detection
------
B1 over-current is detected.
Q2971 (POWER & DEF PWB)
Operation of low B short protection circuit.
5V: Q1961
9V: Q1962 (MAIN PWB)
Operation of CRT neck protection circuit.
Q2401 (POWER & DEF PWB)
The power frequency is changed as follows:
50Hz→60Hz / 60Hz→50Hz
IC1701 (MI-COM & DIST MODULE PWB)
Presence of synchronized signal.
HD: Component input / M: NTSC main / S: NTSC sub
IC1301 (MI-COM & DISTMODULE PWB)
2
ACK is returned when I C traffic is carried out.
IC1703 (memory) (MAIN PWB)
Ditto
IC1501 (MAIN PWB)
Ditto
IC1301 (MAIN PWB)
Ditto
IC1140 (RECEIVER PWB)
Ditto
IC3001 (MI-COM & DIST MODULE PWB)
Ditto
TU1101 (RECEIVER PWB)
Ditto
IC1001 (MI-COM & DIST MODULE PWB)
Ditto
IC1001 (MI-COM & DIST MODULE PWB)
Ditto
IC7001 (DIGITAL INPUT MODULE PWB)
Method of detection
There is its OSD. However the XRAY self-check is not
active.(No counting)
At about 3 seconds after the power is turned on, the self-check
function starts.
If NG is detected for 200ms, the power is turned off automatically.
At about 3 seconds after the power is turned on, the self-check
function starts.
If NG is detected for 200ms, the power is turned off automatically.
At about 3 seconds after the power is turned on, the self-check
function starts.
If NG is detected for 1.5s, the power is turned off automatically.
Periodically check the power frequency by counting the AC
pulse and monitor whether or not the frequency is changed
except for the time immediately after resetting.
When entering the self-check mode, "OK" is shown.
While running the mode with picture signal, if the
synchronized signal is disappeared, "NG" is shown.
The state is monitored every time when I
Then the state is counted as a failure if ACK is not returned.
Ditto
Ditto
Ditto
Ditto
Ditto
Ditto
Ditto
Ditto
Item
B1 over-current protection Tuningon and off at 1-second intervals
Low B short protection Tuningon and off at 2-second intervals
CRT neck protection Tuningon and off at 3-second intervals
2
C traffic is carried out.
POWER LED ON / OFF intervals