Circuit Adjustments; B Board Adjustments - Sony TRINITRON PVM-2950QM Service Manual

PVM-2950Q/2950QM
RM-854
SECTION 6
CIRCUIT ADJUSTMENTS
6-1. B BOARD ADJUSTMENTS
B BOARD - CONDUCTOR SIDE -
RV301 RV302
CN305
© ©
T301
8
.___I _ ___.I
~
0 0
LV301
CP301
©
Q315
RV314
CJ
E
@)
RV305
/C312
C417
□□
C416
R372
□
~·:
{
E
E;i
Q359
[:] 6am
CT3ot@
(!)
RV306
©
CT302@
RV312
wQ354
8
RV3to@
@
©
RV311
E RV309
i:;i
@ @
©
RV307
Q301 RV308
1. Call up the set menu and reset all the user control functions.
2. Connect the oscilloscope between
UT
board CN2O5 Pin ® and
ground and adjust RV2O1 so that the Y output is 2.0
±
0.1
Vp-p ( 100% white signal).
3. Connect the oscilloscope between
UT
board CN2O5 Pin 1 and
ground and adjust RV2O2 so that the Burst output is 200
±
10
mVp-p (100% white signal)
4. Primary color matrix adjustment
4-1. Input a component 75% color bar R-Y and sync signal to
Line 3.
4-2. Set service personnel mode.
-31-
Q325
w
©
~,
~
14
E
4-3. Connect the emitter of Q359 to
+
12V and the emitter of
Q315 to ground.
4-4. Connect the oscilloscope between CN3O5 Pin® and ground
and adjust with the remote controller so that 8-0ut is 50
mVp-p max.
-------------------!
50 mVp-p max.
----------
Fig. 6-1