Sony TAV-L1 (serv.man5) Service Manual ▷ View online
13
13
2-1. Stand by mode
MAIN SYSTEM CONTROLLER
(IC602)
(3) Data back up in MAIN SYSTEM CONTROLLER
“E4V”
D602
C612
1000
6.3V
1000
6.3V
+
Please refer to Schematic diagram on page 68 in the Service manual.
Volume and FM preset setting data is recorded in MAIN SYSTEM
CONTROLLER (IC602).
CONTROLLER (IC602).
To hold the backup data in MAIN SYSTEM CONTROLLER, C612 supplies the
backup voltage when AC plug is disconnected.
backup voltage when AC plug is disconnected.
This backup capacitor can supply the backup voltage for a half day only.
If AC power code is disconnected , the FM preset setting will be erased for more
than a half day.
than a half day.
This Note is written at “Presetting FM radio stations” in Operating Instructions.
If AC power code will be disconnected for repair operation, please mind this
Note.
Note.
14
14
2-2. Wake up operation
MAIN SYSTEM
CONTROLLER
(IC602)
(1) Detecting of wake up input
SUB SYSTEM
CONTROLLER
(IC901)
TOUCH
PANEL
SENSOR
IC1501
TOP
PANEL
KEY
(S1231,
S1232)
TOUCH
PANEL
SIRCS
SIRCS_IN
3pin
SIRCS_OUT
4pin
KEY0-KEY2
94, 95, 97pin
KEY3 83pin
REMOTE
CONTROL
RECEIVER
(IC841)
Please refer to Block diagram on page 55 in the Service manual.
In standby mode, MAIN SYSTEM CONTROLLER (IC602) checks Top panel
key input.
key input.
And, SUB SYSTEM CONTROLLER (IC901) receives the remote control signal
and transfer to MAIN SYSTEM CONTROLLER (IC602).
and transfer to MAIN SYSTEM CONTROLLER (IC602).
MAIN SYSTEM CONTROLLER checks this SIRCS input, too.
When wakeup signal is detected from these inputs, MAIN SYSTEM
CONTROLLER starts wakeup operation.
CONTROLLER starts wakeup operation.
After wake up operation, MAIN SYSTEM CONTROLLER starts to check Touch
panel input.
panel input.
15
15
2-2. Wake up operation
MAIN
SYSTEM
CONTROLLER
(IC602)
(2) Wake up and control signal to other system
LEVEL SHIFT
(IC606, IC912)
(IC606, IC912)
TV SYSTEM
CONTROLLER
(IC1003)
SUB SYSTEM
CONTROLLER
(IC901)
TV POWER KEY
3pin
3pin
I2C_DATA
30pin
30pin
I/O EXPANDER
(IC601)
LED DRIVE, LED
IO_DO, IO_DI
87, 88pin
87, 88pin
FL TUBE DRIVER
(IC842)
FL TUBE
FL_D_OUT
27pin
27pin
AU POWER
SUPPLY
Please refer to Block diagram on page 55 in the Service manual.
MAIN SYSTEM CONTROLLER (IC902) outputs a wake up signal for TV block.
TV SYSTEM CONTROLLER receives this signal as TV power switch input and
start TV operation.
start TV operation.
Next, MAIN SYSTEM CONTROLLER send I2C signal to SUB SYSTEM
CONTROLLER (IC901).
CONTROLLER (IC901).
MAIN SYSTEM CONTROLLER turn on LED and Touch panel back light
through I/O EXPANDER (IC601) .
through I/O EXPANDER (IC601) .
And, MAIN SYSTEM CONTROLLER turn on FL tube with FL TUBE
CONTROLLER (IC842).
CONTROLLER (IC842).
AU POWER SUPPLY circuit operation is explained in next page.
16
16
2-2. Wake up operation
MAIN
SYSTEM
CONTROLLER
(IC602)
(3) Wake up and control signal for AU POWER SUPPLY
+12V REG (IC909)
P_CONT1
40pin
40pin
P_CONT2
44pin
44pin
+3.3V REG(IC910)
MAIN POWER CONTROL
(Q143, Q147)
POWER CONTROL
(IC101)
+5V REG (IC908)
D +3.3V, RF +1.8V,
AMP +1.8V, DSP +1.8V
AMP +1.8V, DSP +1.8V
D +5V, RF +3.3V,
SERVO DSP +3.3V,
FL tube (Approx. -30V)
SERVO DSP +3.3V,
FL tube (Approx. -30V)
AMP +12V, LED +12V
A +9V, A +5V
A +9V, A +5V
AMP +27V from
MAIN POWER
TRANSFORMER
TRANSFORMER
Please refer to Block diagram on page 57 in the Service manual.
MAIN SYSTEM CONTROLLER (IC602) output two Power control signal for
AU POWER SUPPLY circuit.
AU POWER SUPPLY circuit.
By these two output, all the power supply voltage is started to supply.
Most of power supply voltage is supplied from SUB POWER TRANSFORMER
(T102).
(T102).
MAIN POWER CONTROL (Q143, Q147) is turn on by P_CONT2 signal.
And, POWER CONTROL (IC101) boots up and start to control the output
voltage of MAIN POWER TRANSFORMER (T101).
voltage of MAIN POWER TRANSFORMER (T101).
Then, “AMP +27V” is output for S-master amplifiers (IC306, IC307) and LIFT
MOTOR DRIVER (IC916).
MOTOR DRIVER (IC916).
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