
3-5
8. IC600 ABNORMAL
YES
Refer to power supply no 3.3V,
check or replace Q600
Check both end voltage Q600 (3.3V)
NO
YES
Check IC606 pin1 is “H”,
Check or replace Q601
Check Q601 is “H”
NO
YES
Check or replace L600
Check IC604 pin13 is 3.3V
NO
YES
Check or replace X601
Check IC600 pin1, 6 X601 operation
NO
OK
9. U654 ABNORMAL
NO
Check U654 pin1: CE,
pin6: SCK
YES
Check U654 pin2,5/SO,SI
YES
NO
Replace U654
OK
NO
Refer to 3.3V
troubleshooting
Check U654 pin8 VDD 3.3V
YES
OK
10. IC601 ABNORMAL
NO
Check IC601 pin34: CLK
pin35 CKE
YES
Check MCU IC603
YES
NO
Replace MCU
OK
NO
Refer to MCU
troubleshooting
Check MCU IC603
voltage 1.2V
YES
OK
Содержание SB74
Страница 9: ...2 3 2 4 ...
Страница 11: ...2 6 ...
Страница 25: ...3 14 WIRING DIAGRAM JK500 3P 13P CN501 CON2 2P SPK 2P 5P 8P 5P 3P CN580 24P 9P ...
Страница 26: ...3 15 BLOCK DIAGRAM ...
Страница 27: ...3 16 ...
Страница 34: ...PRINTED CIRCUIT BOARD DIARGAMS 1 1 MAIN P C BOARD DIAGRAM TOP VIEW 3 29 3 30 ...
Страница 35: ...1 2 MAIN P C BOARD DIAGRAM BOTTOM VIEW 3 31 3 32 ...
Страница 37: ...3 1 MCU9800 P C BOARD DIAGRAM TOP VIEW 3 35 3 36 ...
Страница 38: ...3 2 MCU9800 P C BOARD DIAGRAM BOTTOM VIEW 3 37 3 38 ...
Страница 39: ...4 FRONT P C BOARD DIAGRAM 5 CD JACK P C BOARD DIAGRAM 3 39 3 40 ...