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21HF2-SS
CHAPTER 5.
21HF2-SS
TROUBLE SHOOTING FLOWCHART
[1] TROUBLE SHOOTING FLOWCHART
Check R701.
Check D751, IC702, D750
and IC703.
Service Manual
NO RASTER
Check F701.
Check T701 pin (17) voltage
(Approx. 310V at 220V AC)
Check Secondary Main+B
(Approx. 130V)
Check CRT connector K-
wire and the signal on it.
Check 185V
Check
Bias on
IC801.
CRT board.
Does horizontal circuit
oscillate ?
Check Q601 and Q602.
5 – 1
Blown out.
Replace the fuse.
The fuse is blown out again.
Check IC701, D701 and
C705.
Check Q752 for 8V regulator
circuit and Q751, Q754 for
5V regulator circuit.
Checking the
protector circuit.
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