Sony TAV-L1 (serv.man5) Service Manual ▷ View online
9
9
1-6. Audio
TV block
DVD playback
AU Power supply
TV Power supply
AV
Input
FPD
LIFT
Audio control
(Power supply/Key input/
DVD playback/Audio)
TV
Control
TAV-L1
Audio
Audio block
TAV-L1 equips Audio part in Audio block .
The playback sound of disc, TV tuner and AV input are input to this Audio part
and amplified.
and amplified.
The multi channel sound converts to 2ch sound with “S-Force PRO front
surround”.
surround”.
By this surround system, multi channel sound can be simulated with 2 channel
sound.
sound.
Finally, Audio part outputs two speaker sounds and one sub woofer sound.
10
10
2. AU Power supply
& Audio control
Please refer to the block diagram of service manual.
11
11
2-1. Stand by mode
AC voltage
Sub power transformer
(T102)
“MAIN SYS +3.3V”
for MAIN SYSTEM CONTROLLER
(IC602)
“SUB SYS +3.3V”
for SUB SYSTEM CONTROLLER
(IC901)
POWER CONTROL
(IC121)
(1) Power supply for MAIN and SUB SYSTEM CONTROLLER
“E4V”
“IC912 +3.3V”
for LEVEL SHIFT
(IC902, IC606)
D602
D906
D905
Feedback
Control
VCC
Please refer to Block diagram on page 57 in the Service manual.
When you connect the AC plug to the outlet, AC voltage inputs to Sub Power
transformer (T102) and POWER CONTOL (IC121 8pin).
transformer (T102) and POWER CONTOL (IC121 8pin).
The operation voltage is supplied from Sub Power transformer to POWER
CONTROL (IC121 4pin) and POWER CONTROL starts operation.
CONTROL (IC121 4pin) and POWER CONTROL starts operation.
POWER CONTROL checks output voltage of Sub power transformer with
FB/OLP terminal (IC121 6pin).
FB/OLP terminal (IC121 6pin).
And, POWER CONTROL controls the output voltage of Sub power transformer
with DRAIN output (IC121 1pin).
with DRAIN output (IC121 1pin).
Then, Sub power transformer outputs constant “E4V”.
“E4V” is used for the followings.
“MAIN SYS +3.3V” is for MAIN SYSTEM CONTROLLER (IC602).
“SUB SYS +3.3V” is for SUB SYSTEM CONTROLLER (IC901).
“IC912 +3.3V” is for LEVEL SHIFT (IC912, IC606).
LEVEL SHIFT ICs are for data communication between MAIN and SUB
SYSTEM CONTROLLER. (Refer to page 55 of service manual.)
SYSTEM CONTROLLER. (Refer to page 55 of service manual.)
12
12
2-1. Stand by mode
MAIN SYSTEM CONTROLLER
(IC602)
RESET SIGNAL GENERATOR
(IC603)
(2) Reset signal for MAIN and SUB SYSTEM CONTROLLER
SUB SYSTEM CONTROLLER
(IC901)
RESET 12pin
SUB RESET 84pin
RESET 12pin
“E4V”
D601
D602
D906
By “E4V”, RESET SIGNAL GNERATOR (IC603) boots up and output a
RESET signal to MAIN SYSTEM CONTROLLER (IC602 12 pin) through
RESET SW(Q602).
RESET signal to MAIN SYSTEM CONTROLLER (IC602 12 pin) through
RESET SW(Q602).
Then, MAIN SYSTEM CONTROLLER boots up.
Next, MAIN SYSTEM CONTROLLER (IC602 84pin) outputs reset signal to
SUB SYSTEM CONTROLLER (IC901 12pin)
SUB SYSTEM CONTROLLER (IC901 12pin)
Then, SUB SYSTEM CONTROLLER boots up.
At this time, SUB SYSTEM CONTROLLER is in STOP mode.
This condition is stand by mode.
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