Ha-3 Tv Chassis Board Replacement - Sony KD-34XBR2 Training Manual

Board Circuits
Standby Power
A
Supply
Degaussing circuit
Primary Power
Supply (9V, 5V,
3.3V)
H & V
Oscillators/Jungle
Both Tuners
Audio output
Video processing
B
and audio switching.
Closed caption/V
Chip
Main Micro IC001
OSD (Menu)
RGB CRT signal
C
amplifiers

HA-3 TV Chassis Board Replacement

Fuses
#
R6002
None
None
Load #
Primary PS D4415,
D4416
D6017
D6015,20
None
D9010
66
14. HA-3 TV Chassis Board Replacement
Zeners
Purpose
+24V OVP No Adjustments
Audio Out
B+
6.8V for
pwr OFF A
mute
Q6.5V
OVP
Transplant memory
IC004 containing
system and user
data, including analog
tuner active stations.
** see note below.
G1 Volt Adj Screen control
limiter according to the
service manual:
Reduce vertical size
to see IK line at the
top. Blank pix in the
service mode* by
changing CXA2150P-
2/ALBLK data from 0
to 1. Adjust screen
control so the IK line
is just invisible in a
dark room.
Adj H Static Control
After board
Replacement