
3-1
TROUBLESHOOTING GUIDE
1. SMPS PART
YES
YES
YES
NO
Replace the F901 (Use same type Fuse)
NO
Replace the BD901
NO
Replace the R901
Is the F901 nomal?
Is the BD901 nomal?
Is the R901 nomal?
YES
Power Line of Main PCB is short
12V
NO
Is the D911 nomal?
Is Vcc(9V~25V) supplied to IC911 pin5?
YES
Check or replace the D911
NO
Replace the D952
Is the D952 nomal?
YES
NO
Replace the D950
Is the D950 nomal?
YES
NO
2. P-SENS PART
Check U301A
Does +4V appear
at U301A
YES
Is the D702 nomal?
Check JK600 pin21
YES
Replace the D702
Check IC603 pin58
SECTION 3. ELECTRICAL PART
Check D306
Refer SMPS 12V
Check
NO
NO
NO
NO
NO
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 ...