Tech Line VD-170, Руководство по обслуживанию

Страница: 30 / 68

1-12-2 SCRK05
LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING
PAGES:
1. CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE.
2. CAUTION:
Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F1001) is blown, first check to see that all components in the power supply circuit are not defec-
tive before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the
power supply circuit to fail.
3. Note:
(1) Do not use the part number shown on the drawings for ordering. The correct part number is shown in the
parts list, and may be slightly different or amended since the drawings were prepared.
(2) To maintain original function and reliability of repaired units, use only original replacement parts which are
listed with their part numbers in the parts list section of the service manual.
4. Voltage indications for PLAY and REC modes on the schematics are as shown below:
5. How to read converged lines
6. Test Point Information
2 3 1
5.0
(2.5)
PLAY mode
STOP mode
5.0
The same voltage for
both PLAY & STOP modes Indicates that the voltage
is not consistent here.
< DVD Section >
2 3 1
5.0
(2.5)
< >
PLAY mode
REC mode
DVD mode
5.0
The same voltage for
both PLAY, REC & DVD
modes
Indicates that the voltage
is not consistent here.
< VCR Section >
Unit: Volts
1-D3
Distinction Area
Line Number
(1 to 3 digits)
Examples:
1. "1-D3" means that line number "1" goes to the line number
"1" of the area "D3".
2. "1-B1" means that line number "1" goes to the line number
"1" of the area "B1".
3
2
1
A B C D
1-B1
1-D3
AREA D3
AREA B1
: Indicates a test point with a jumper wire across a hole in the PCB.
: Used to indicate a test point with a component lead on foil side.
: Used to indicate a test point with no test pin.
: Used to indicate a test point with a test pin.