Ver 1.1 2000. 06
SAFETY CHECK-OUTTABLE OF CONTENTS
After correcting the original service problem, perform the following1. GENERAL
safety check before releasing the set to the customer:Playing a CD ........................................................................... 4
Check the antenna terminals, metal trim, Ometallized� knobs, screws,Listening to the radio ............................................................... 4
and all other exposed metal parts for AC leakage. Check leakage asPlaying a tape .......................................................................... 5
described below.Recording on a tape ................................................................. 5
LEAKAGE TEST2. DISASSEMBLY
2-1. OTop Assy, Cabinet�, OChanger Assy, CD� ......................... 6
The AC leakage from any exposed metal part to earth ground and2-2. Rear Assy, Cabinet .............................................................. 6
from all exposed metal parts to any exposed metal part having a2-3. Power Board........................................................................ 7
return to chassis, must not exceed 0.5 mA (500 microamperes).
2-4. Mechanism Deck Block ...................................................... 7
Leakage current can be measured by any one of three methods.2-5. Main Board ......................................................................... 8
2-6. LCD Board .......................................................................... 8
1. A commercial leakage tester, such as the Simpson 229 or RCA2-7. CD Lamp Board and Disc Board and Display Board ......... 9
WT-540A. Follow the manufacturersO instructions to use these2-8. Base, Changer ..................................................................... 9
instruments.2-9. Optical Pick-up ................................................................. 10
2. A battery-operated AC milliammeter. The Data Precision 245
3. MECHANICAL ADJUSTMENTS...............................11
digital multimeter is suitable for this job.
4. ELECTRICAL ADJUSTMENTS
3. Measuring the voltage drop across a resistor by means of a VOM
Tape Section .......................................................................... 11
or battery-operated AC voltmeter. The Olimit� indication is 0.75
Tuner Section......................................................................... 13
V, so analog meters must have an accurate low-voltage scale. The
CD Section ............................................................................ 14
Simpson 250 and Sanwa SH-63Trd are examples of a passive
VOM that is suitable. Nearly all battery operated digital
5. DIAGRAMS
multimeters that have a 2V AC range are suitable. (See Fig. A)
5-1. IC Pin Description ............................................................. 15
5-2. Circuit Boards Location .................................................... 16
5-3. Block Diagram �CD Section�........................................... 17
To Exposed Metal5-4. Block Diagram �Main Section�........................................ 19
Parts on Set5-5. Printed Wiring Boards �Key Section� .............................. 21
5-6. Schematic Diagram �Key Section�................................... 23
5-7. Printed Wiring Board �Audio Section� ............................ 25
5-8. Schematic Diagram �Audio Section� ............................... 27
5-9. Printed Wiring Boards �CD Section� ............................... 29
AC5-10. Schematic Diagram �CD Section�.................................... 31
0.15?F1.5k&voltmeter
5-11. Printed Wiring Boards �Control Section�......................... 33
(0.75V)
5-12. Schematic Diagram �Control Section� ............................. 35
5-13. Printed Wiring Boards �Power Supply Section� .............. 37
5-14. Schematic Diagram �Power Supply Section�................... 39
5-15. Schematic Diagram �Tuner Section�................................ 41
Earth Ground
6. EXPLODED VIEWS
Fig. A. Using an AC voltmeter to check AC leakage.
6-1. Rear Cabinet Section ......................................................... 48
6-2. Front Cabinet Section-1 .................................................... 49
6-3. Front Cabinet Section-2 .................................................... 50
6-4. CD Changer Section-1 ...................................................... 51
6-5. CD Changer Section-2 ...................................................... 52
6-6. Tape Mechanism Deck Section-1...................................... 53
6-7. Tape Mechanism Deck Section-2...................................... 54
6-8. Tape Mechanism Deck Section-3...................................... 55
6-9. Optical Pick-up Section .................................................... 56
6-10. Speaker Section ................................................................. 57
7. ELECTRICAL PARTS LIST.........................................58
� 3 � |
ACEC
