Kenwood TK-5810 Service Manual page 55

● Checking the signal output from
the ASIC by software control
Points to be checked
SBC R822
Points to be checked
/DRST TP992
● Panel control (Control unit)
Points to be checked
/PRST Q203 (Gate)
Points to be checked Normal
SB D506
● Panel control (KCH-14 or 15)
Checking voltage
Points to be checked
VCC IC1 (2 pin)
Checking the clock/reset
Points to be checked
Xout R25
/PRST L2
Checking the Control signal
Points to be checked
DISP C40 (Signal side)
CE R47 (Signal side)
It is unlikely that the BGA parts are broken.
● When an error display appears on the LCD.
The LCD displays "INIT ERROR1".
The LCD displays "INIT ERROR2".
The LCD displays "INIT ERROR3".
Replacing Control Unit
■ Control unit Information
Original Control
Model Name
unit Number
TK-5810(BG) K,K2
X53-4400-10
TK-5810H(BG) K,K2
TROUBLE SHOOTING
When a normal
value is confirmed.
When an abnormal
value is confirmed.
Normal voltage
3.3V
When a normal
value is confirmed.
When an abnormal
value is confirmed.
Normal voltage
3.3V
When a normal
value is confirmed.
When an abnormal
value is confirmed.
Normal voltage
3.3V
When a normal
value is confirmed.
When an abnormal
value is confirmed.
voltage
13.2V
When a normal
value is confirmed.
When an abnormal
value is confirmed.
Normal voltage
5.0V
When a normal
value is confirmed.
When an abnormal
Normal voltage value is confirmed.
14.7456MHz (5.0V)
5.0V
When a normal
value is confirmed.
When an abnormal
value is confirmed.
Normal voltage
0V
5.0V−0V−5.0V
When a normal
value is confirmed.
For Service Control
unit Number
X53-4400-11
TK-5810 BG
(
Remove R822. If the ASIC side is 0V,
the ASIC/FLASH/SRAM may be broken.
If the /DRST is 0V, the ASIC/FLASH/SRAM are broken.
Remove Q203. If the ASIC side is 0V,
the ASIC/FLASH/SRAM may be broken.
If the SBC is 3.3V and SB Q3 (pin 2) side is 13.2V or
more, the BGA parts are not broken.
The BGA parts are not broken.
IC1 may be broken.
If nothing is displayed even after replacing the
KCH-14 or 15, the BGA may be broken.
The panel microcomputer receives a request of LCD
display from the ASIC. Then, the LCD displays.
The DISP and CE signal become abnormal if
communication is disabled due to a trouble in
the ASIC.
An error occurs when the ASIC internal RAM reads
or writes. The ASIC may be broken.
An error occurs when the DSP internal RAM reads
or writes. The DSP may be broken.
An error occurs when the SRAM internal RAM
reads or writes. The SRAM may be broken.
/5810H BG
) ( )
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