Protection Circuits - Sony KV-32HS500 Training Manual
Direct view/projection television troubleshooting, da-4 & da-4x chassis
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Also See for KV-32HS500:
- Service manual (420 pages) ,
- Operating instructions manual (91 pages) ,
- Brochure (2 pages)
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Chapter 4 - DA-4 & DA-4X Protection Circuits
DA-4 Protection Circuits
Overall Block Diagram
CHASSIS
TEMPERATURE
(7X)
PROTECTION
TH5002
B+ OCP
Q5004
(2X)
FBT
OCP
(7X)
VIDEO MUTE
Q8008
VERTICAL
DEFLECTION
(4X)
PROTECTION
IC5004
A BOARD
LOW B+ 5V
(6X)
PROTECTION
IC504, Q527
IK WHITE BAL.
PROTECTION
(5X)
IC9001, IC9002,
IC9003
CH/CX BD.
FIGURE 4-1 - DA-4 PROTECTION CIRCUITS OVERALL BLOCK
Figure 4-1 is a basic block diagram illustrating the interconnection of the protection circuit, System control and
the AC relay. Also shown on the diagram is the Standby/Timer LED flash sequence for when the particular
protection circuit is triggered (e.g. 4X will occur with a vertical deflection failure). Each protection circuit will be
discussed in greater detail in coming diagrams. The purpose for each protection circuit is indicated by the name
of the particular block.
M BOARD
SYSCON
IC2300
CRT DRIVE
IC2801
B BOARD
PROTECTION
V-PROT
IK PROT
AC-RELAY
DATA
INRUSH
LOW HV
PROTECTION
RELAY
IC8006
RY6502
(6X)
(7X)
HV POWER SUPPLY
EXCESSIVE HV
PROTECTION
IC8001
HOT
GROUND
SECTION
(6X)
27
4. DA-4 & DA-4X Protection Circuits
AC RELAY
RY6501
Q6527
LATCH
Q6532
Q6530
B+ OVP
IC6505
(3X)
IC8002
HORIZONTAL
DEFLECTION
PROTECTION
IC8006
(7X)
D BOARD
FBT OCP
(AC SHUT OFF)
Q8007
(7X)
C31P15-4-1
10/30/02
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