Sony TAV-L1 (serv.man5) Service Manual ▷ View online
17
17
2-3. Control operation
MAIN
SYSTEM
CONTROLLER
(IC602)
(1) Control signal to other system
LEVEL SHIFT
(IC606, IC912)
(IC606, IC912)
TV SYSTEM
CONTROLLER
(IC1003)
SUB SYSTEM
CONTROLLER
(IC901)
I/O EXPANDER
(IC601)
Audio digital circuit
(IC102)
(IC502, IC505)
Audio circuit
(IC304, IC305)
KEY INPUT
MAIN SYSTEM CONTROLLER(IC602) communicate with SUB SYSTEM
CONTROLLER with I2C_DATA line (IC901 30pin).
CONTROLLER with I2C_DATA line (IC901 30pin).
(Page 55 in the Service manual)
And, SUB SYSTEM CONTROLLER outputs a control signal to TV circuit
(IC1001 31pin) with I2C_DEV_DATA terminal (IC901 35pin).
(IC1001 31pin) with I2C_DEV_DATA terminal (IC901 35pin).
(Page 55 and 52 in the Service manual)
MAIN SYSTEM CONTROLLER communicate with MPEG DECODER
(IC102) and control signal decoding operation with DVD SID and DVD SOD
terminals (IC602 31, 32pin).
(IC102) and control signal decoding operation with DVD SID and DVD SOD
terminals (IC602 31, 32pin).
(Page 50 in the Service manual)
And, MAIN SYSTEM CONTROLLER (IC602) also controls Audio circuit
operation (IC502, IC503, IC304, IC305) directly.
operation (IC502, IC503, IC304, IC305) directly.
(Page 53 and 54in the Service manual)
MAIN SYSTEM CONTROLLER (IC602) uses I/O EXPANDER (IC601) to
input and output more signals.
input and output more signals.
(Page 55 in the Service manual)
18
18
2-4. Emergency operation
(1) AC plug is pulled off
MAIN SYSTEM
CONTROLLER
(IC602)
SUB SYSTEM
CONTROLLER
(IC901)
AC CUT
6pin
AC DETECT
(Q161, Q162)
Data backup
(Volume level, etc.)
Audio output muting
Turning off TV circuit
Turning off TV circuit
AC voltage
from AC plug
AC CUT
20pin
RESET
(IC603)
(IC603)
Please refer to Block diagram on page 57 and 55 in the Service manual.
When AC plug is pulled off, the AC voltage decrease.
The AC voltage is isolated and detected by SUB SYSTEM CONTROLLER
(IC901 6pin) through AC DETECT (Q161, Q162).
(IC901 6pin) through AC DETECT (Q161, Q162).
And, AC cut signal is also sent to MAIN SYSTEM CONTROLLER through
RESET (IC603) . Then, MAIN SYSTEM CONTROLLER starts to shut down
operation.
RESET (IC603) . Then, MAIN SYSTEM CONTROLLER starts to shut down
operation.
1. Data backup in MAIN SYSTEM CONTROLLER (Volume level, etc.)
2. Audio output muting
3. Tuning off TV circuit
19
19
2-4. Emergency operation
(2) LIFT motor problem
MAIN SYSTEM
CONTROLLER
(IC602)
SUB SYSTEM
CONTROLLER
(IC901)
CURRENT_DET
80pin
CURRENT DET
(IC915)
Data backup
(Volume level, etc.)
Audio output muting
Turning off TV circuit
Turning off TV circuit
Error message on FL display
“LIFT ERROR 04”
“LIFT ERROR 04”
I2C_DATA
30pin
I2C_DATA
30pin
+12V
Please refer to Block diagram on page 55 in the Service manual.
The current to LIFT motor which moves the Lift unit up and down is detected in
CURRENT DET (IC915).
CURRENT DET (IC915).
If the current to LIFT motor is more than approx. 3A, Over current is detected by
SUB SYSTEM CONTROLLER with CURRENT_DET terminal (IC901 80pin).
SUB SYSTEM CONTROLLER with CURRENT_DET terminal (IC901 80pin).
By detecting over current of LIFT motor, SUB SYSTEM CONTTOLLER send
the condition to MAIN SYSTEM CONTROLLER (IC602).
the condition to MAIN SYSTEM CONTROLLER (IC602).
Then, MAIN SYSTEM CONTROLLER starts to emergency operations.
1. Data backup in MAIN SYSTEM CONTROLLER (Volume level, etc.)
2. Audio output muting
3. Turning off TV circuit
4. Showing an error message on FL display
The error message list of LIFT PROTECT is written on page 6 in the Service
manual.
manual.
20
20
2-4. Emergency operation
(3) Audio circuit problem (Over current, Over load)
MAIN SYSTEM
CONTROLLER
(IC602)
POWER AMP
(IC306, IC307)
FL Speaker
OVER LOAD DET
(Q305, Q309)
Data backup
(Volume level, etc.)
Audio output muting
Turning off TV circuit
Turning off TV circuit
Error message on FL display
“PROTECT”
“PROTECT”
SD
3pin
3pin
DRIVE_OCP
48pin
FR Speaker
OVER LOAD DET
(Q306, Q310)
PROTECT DET
(Q307)
Sub woofer
OVER LOAD DET
(Q306, Q310)
Please refer to Block diagram on page 54 in the Service manual.
There are two types of audio circuit problem.
The overheat of POWER AMP (IC306, IC307) is detected by POWER AMP itself. The detected
result is transferred to MAIN SYSTEM CONTROLLER (IC602).
result is transferred to MAIN SYSTEM CONTROLLER (IC602).
Speaker’s overload is detected by each detectors beside the speaker signal lines.
The detected result is transferred to MAIN SYSTEM CONTROLLER (IC602) through
PROTECT DET (Q307).
PROTECT DET (Q307).
When MAIN SYSTEM CONTROLLER detects these emergency at DRIVE_OCP terminal
(IC602 48pin), MAIN SYSTEM CONTROLLER starts emergency operations.
(IC602 48pin), MAIN SYSTEM CONTROLLER starts emergency operations.
1. Data backup un MAIN SYSTEM CONTROLLER (Volume level, etc.)
2. Audio output muting
3. Turning off TV circuit
4. Showing an error message “PROTECT” on FL display
The error message of “PROTECT” is explained on page 77 in the “Operating Instructions”.
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