A Board Adjustment After Ic003 (Memory) Replacement - Sony KV-EF34M31 Service Manual

Y LEVEL (SUB PICTURE) ADJUSTMENT
1. Input a PAL colorbar signal.
2. Set to TWIN PICTURE mode.
3. Connect an oscilloscope to pin 2 (R-out) of CN705 on the C
board.
4. Adjust VR5301 on B board so that white level of main picture
and sub picture becomes same level.
HUE LEVEL (SUB PICTURE) ADJUSTMENT
1. Input a NTSC colorbar VIDEO signal.
2. Set to TWIN PICTURE mode.
3. Connect an oscilloscope to pin 2 (R-out) of CN705 on the C
board.
4. Select SVP (02) SHU with 1 and 4 of the commander so
that waveform of main picture and sub picture become same
level.
n - on the commander to write the data
5. Press
MUTING
with SVP (02) "SHU" Video mode and TV mode.
H-TRAPIZIUM ADJUSTMENT
1. Input a cross hatch/dot signal.
2. Adjust RV1801 on C board to make H-Trapizoid distortion best.
FREQUENCY (FREE RUN) ADJUSTMENT
1. Select Video 1 (no signal).
2. Connect a frequency counter across pin !ª (FH) IC301 of A
Board.
3. Select VP (OF) HOS with 1 and 4 of the commander then
adjust to 15.690kHz ± 25Hz using 3 and 6.
KV-EF34M31/EF34M61/EF34M80/EF34M90/EF34M91
4-4. A BOARD ADJUSTMENT AFTER IC003
(MEMORY) REPLACEMENT
When replacing IC003 (MEMORY), be sure to change IC001 (µ-
COM) to the following new IC at the same time.
MODEL
KV-EF34M31(OCE)
KV-EF34M61(GE)
KV-EF34M90(HK)
KV-EF34M90(JE)
KV-EF34M80(ME)
KV-EF34M91(ME)
1. Enter to Service Mode.
2. Press commander buttons 5 and - (Data Initialize), and 2
and - (Data Copy) to initialize the data.
3. Call each item number and check if the respective screen shows
the normal picture.
In cases where items are not well adjusted, rectify the items
with fine adjustment.
Write the data per each item number (
4. Select item numbers "OPB0" (OP1), "OPB1" (OP2) and
"OPB2" (OP3) and respectively set the bit per model with
command buttons 3 and 6.
5. Press commander buttons 8 and - (Test Normal) to return
to the data that was set on the shipment from the factory.
(This will also cancel Service Mode.)
– 49 –
RM-951
IC001 (µ-CON)
CXP750097-001S
CXP750097-002S
[MUTING]
+-).