Sony KD-34XBR2 Training Manual page 99

Chart 21-2 explains the function of each block in the HV stage.
Block Name
PWM Generator
LOT – Low Output
Transformer
HV Drive / Output, FBT
HV Distribution Block
HV Protection
Refer to Figure 21-2 for the operational description of the HV stage.
+135V
SEC.P.S
G BD.
IC6001
(G BD.)
9
CN6106/
CN8013
+135V
H OUT
REG.
D BD.
Q8027
H DRIVE
Q8023
CN8004/
CN3005
10
A BD.
IC3006
VIDEO
PROCESS
+135V
+135V
1 1
CN3023/
CN3001/
CN9001 CN9001
V BD.
VEL MOD COILS
Chart 21-2 - HV Block Operation
Major component
IC8008, Q8035,
Q9035
T8004
Q8005, Q8032,
Q8038, T8005
IC8006-7
1 2
CN8016
+12V
12
1
VR8001
18
5k
IC8008
HV
PWM GEN.
6
14 10
DRIVER
Q8004
Q8016
Q8019
Q8020
40 10
CN3007/
DRIVERS
CN8006
Q8005,
Q8032
+15V
1
R8198
CN3010/
10k
CN9001
D BD.
FIGURE 21-2 - HIGH VOLTAGE STAGE - RA-5 CHASSIS
Provides regulated B+ supply voltage to the HV Output stage,
preventing picture width fluctuations. A sample of the HV from
the distribution block is used for error correction
Primary is regulated voltage. Secondary outputs 200V B+
voltage to the RGB video output ICs on the C boards.
Amplifies the H drive signal to feed the flyback (FBT). The FBT
develops the HV.
Input is HV from the FBT. Outputs are HV for each CRT and
one HV sample voltage reduced to about 7.4Vdc for regulation .
Monitors the FBT output and stops the HV by grounding out the
H Drive input.
Q8035
R8196
S
HV REG.
P
3
CH
C8118
D
D8029
MIX OUT TO
Q8038
IC8007
HV OUT
DRIVER 8.1V
Q8036 N
G
R8160
Q8037
D8031 D8034
18V
3
IC8007
Q8022
PROT. 1
7
5
Q8021
5
IC8006
7
PROT. 2
3
D8015
LATCH
96
21. RA-5A Chassis High Voltage Stage
Purpose
HV BLK
7.46VDC
3 4
R8171
100
D8036
15V
12
7 LOT
14
T8004
D8039
D8030
200V
1
T8005
1
FBT
D8035
2 11
C8142
ABL
D8023
Q8028-9
ABL
D8025
R8223
R8153
PROT.
VR8002
D8017
100k
CRT
HV
CN8022/ 200V TO
VIDEO
CN7304
1 OUT B+
C B BD.
6
R8219
D8038
CN8021
1
R
2
34TVP12 1350 8/31/01