Sony KS-50R200A Service Manual page 127

POWER ON SEQUENCE
AC IN
Standby converter ON
STBY5V output
AC Relay
No
CN6902 pin C24 "H" Standby mode
G board
Pin C24 "H" is supplied by TV Micro.
Yes
Please check AG board
CN6005
No
Pin 1-3 0 ohm? Standby mode
G board
Yes
CN6005 is connected to the
Thermostat near the Lamp. Open
AC Relay
Thermostat disables AC Relay
RY6004 ON
RY6004 to work.
This happens when extreme heat
is occurred at lamp area.
PFC converter
ON
ï When Set has no power (no LED action), these problem
may be happened as below
- Main Power Key does not work.
- TV Micro on AG has problem.
- Check H1 board (power key SW on it) and harness connection
H1(CN3001) and harness to CN8001 on AG Board
- Remote Commander does not work.
.
Check H2A/H2B board (it has IR receiver) and harness connection
H2A(CN3050)/H2B(CN3080) and harness to CN8001 on AG Board
- TV Micro on AG has problem.
- In case of TV Micro on AG board does not work.
- Check STBY 5V power rail from G Board.
IC6300, D6300 on G Board.
- TV Micro itself has problem. Replace AG board.
Audio_Vcc/11V/6.5V/16.5V out
Inrush restriction resistor
No Power Supply
– 4-84 –
KS-50R200A/60R200A/70R200A
RM-GA006
Main converter ON
by REC_ON signal
Is shorted by 7V
No
Error from
Lamp ON,
Ballast? Picture appears
Yes
No Picture
RM-GA006 RM-GA006
9V Out