Kenwood TK-5210, Руководство по обслуживанию

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TK-5210
(
G
)
44
TROUBLE SHOOTING
■
Descriptions of signal names
1) RST (RESET) : ASIC reset signal LOW
→
Reset
2) /BINT : Battery fi nal voltage monitoring LOW → Final voltage
3) PSW : Power switch signal HIGH
→
ON
4) /FRST : FLASH reset signal LOW → Reset
5) SBC : Switch B control HIGH
→
ON
6) /DRST : DSP reset signal LOW → Reset
7) /LCDRST : LCD reset signal LOW
→
Reset
8) /CS4 : LCD controller chip select signal LOW → Active
●
The LCD displays control
(K2, K3 and K7 models only)
It is unlikely that the BGA parts are broken.
Points to be checked Normal voltage
/CS4 IC18 (7 pin) 3.3V → 0V → 3.3V
Points to be checked Normal voltage
5M IC704 (6 pin) 5.0V
If 5M is 0V, parts other than the BGA are broken.
If the /CS4 is 0V or 3.3V, the ASIC/FLASH/SRAM
may be broken.
Points to be checked Normal voltage
/LCDRST R203 3.3V
Remove R203. If the ASIC side is 0V,
the ASIC/FLASH/SRAM may be broken.
When a normal
value is confirmed.
When a normal
value is confirmed.
When a normal
value is confirmed.
When an abnormal
value is confirmed.
When an abnormal
value is confirmed.
When an abnormal
value is confirmed.
or
or
●
When an error display appears on the LCD. (K2, K3 and K7 models only)
The LCD displays “INIT ERROR1”.
An error occurs when the ASIC internal RAM reads
or writes. The ASIC may be broken.
The LCD displays “INIT ERROR2”.
An error occurs when the DSP internal RAM reads
or writes. The DSP may be broken.
The LCD displays “INIT ERROR3”.
An error occurs when the SRAM internal RAM
reads or writes. The SRAM may be broken.
●
When the LED color changes red and orange alternately. (K model only)
A warning tone does not sound.
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.
Replacing Control Unit
■
Control unit Information
Model Name
Original Control
unit Number
For Service Control
unit Number
TK-5210(G) (K) X53-4390-10 X53-4390-13
TK-5210(G)
(K2, K7: 4-key)
X53-4390-11 X53-4390-14
TK-5210(G)
(K3: DTMF keypad)
X53-4390-12 X53-4390-15