Sony TRINITRON KV-16WT1 - Vertical Overscan Blanking Adjustment; BE-4 Self Diagnostic Software

VERTICAL OVERSCAN BLANKING ADJUSTMENT
Receive an Off-Air signal.
Enter into menu and select zoom3. (zoom mode)
Enter into the service mode.
Using the Blue or Green buttons select Vert. Amp
(V-size). Take note of the actual value and reduce it as
indicated below.
Lt al
5. Adjust RV1500 on B-board to obtain the same video
blanking area at the top and bottom of the screen.
6. Readjust the Vert.Amp (V-size) increasing it to the
original setting.
Fae Ber
®
RV1500
- B Board Component Side -
Note : Deflection System Adjustments should not be carried
out whilst using an NTSC (60Hz) signal, or if the
signal is unlocked.
KV-16WT1
4-3. BE-4 SELF DIAGNOSTIC SOFTWARE
The identification of errors within the BE-4 chassis is
triggered in | of 2 ways :- 1: Bus busy or 2: Device failure to
respond to I7C.
In the event of one of these situations arising the software
will first try to release the Bus if busy (Failure to do so will
report with a continuous flashing LED) and then
communicate with each relevant device in turn to establish if
a device is faulty. If a device is found to be faulty the
relevant device number will be displayed through the LED
by a Series of flashes which must be counted (See Table 1).,
Non fatal errors are reported with this method.
If a fatal error is found, the set will simply stay in whichever
state it was when the error occurred, but if a non fatal error
occurs the set will try to continue to operate.
Table 1
No of Flashes Meaning
1C301 not acknowledging |°C transmission, NVM OK.
1C301 FAULT (Not OK) - flags
IC301 - No H Flyback
1C301 - Stack Overflow.
Overvoltage / Overcurrent Protection (Pin 52) high.
1C002 not acknowledging |’*C transmission, IC301 OK.
8 IC002 and IC301 - No I*C acknowledgment.
——=}
9 General | *C Error (SDA or SCL being held low)
(IC301, 1C001, IC002, CNO01)
Flash Timing Example : e.g. error number 3
Stby LED
FUL
SFA
SUID
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