Ha-3 Chassis Overall Block - Sony KD-34XBR2 Training Manual

The HA-3 TV chassis is the first direct view TV that contains a DTV decoder. This decoder is identified as the " Q"
box and is a shielded assembly within the TV. Currently only the KD-34XBR2 model houses the HA-3 chassis.
The major stages of the model KD-34XBR2 bridge several boards as shown in Figure 4-1. These stages are:
•
Power supply (A, D and F boards)
• Video Processing Stage (B board)
• Deflection Stages (described in detail within the DTV-02 training manual) (D board)
SPLITTER/
ISOLATOR
VIDEO
IN
(U, HB
BD.'s)
TUNER
A
STANDBY
P.S
F BD.
Power Supply
The power supply consists of three parts as shown in Chart 4-1:
Name Board Purpose
Standby F
Primary A
Secondary D
The Primary power supply starts the secondary supply using a Pri-Pre 15V line. Once the Secondary power
supply operates, these voltages supply the deflection circuitry on the D board and the HV starts.

HA-3 Chassis Overall Block

B BD.
VIDEO A
IC401
A/V
VIDEO B
SW.
IC001
MAIN
TUNER
MICRO
B
LOWER
ANALOG
VOLTAGES
TUNERS
A BD.
ON/OFF
RY6501
HIGHER
D BD.
VOLTAGES
FIGURE 4-1 - HA-3 CHASSIS OVERALL BLOCK
Chart 4-1 - Model KD34XBR2 / HA-3 Chassis Power Supplies
Powers Main Micro IC001 and AC relay. Outputs Standby 7 and 15Vdc
Outputs 12Vdc and lower voltages to the A, B and S boards. Outputs Pri -Pre 15V to start
the Secondary Power Supply.
Supplies the deflection (D) board with the higher voltages such as 200V (HV), 135V (H
Defection), and 24V (audio).
MAIN
ANALOG
SYNC
VIDEO
SUB
PROCESS
SYNC
HI
H+V
SCAN
SYNC
VIDEO
Q BD. IC3101
Y/C
CRT
DRIVE
PRIM
P.S
VD
HD
PRI-
PRE
SEC
P.S
HV/
200V
FBK
10
4. HA-3 Chassis Overall Block
DTV
DRC
TUNER
MID
Q BOX
IC9001-3
RGB
RGB
RGB
DRIVERS
C BD.
IC5004
VD
H DRIVE
YOKE
VD
HV
HD
43TVP12 1359 8/30/01