Jvc HRXVS 20 AG Schematic

Page 2

CHARTS AND DIAGRAMS

NOTES OF SCHEMATIC DIAGRAM

Safety precautions

The Components identified by the symbol A are
critical for safety. For continued safety, replace safety
critical components only with manufacturer's recom-
mended parts.

1. Units of components on the schematic diagram
Unless otherwise specified.
1) All resistance values are in ohm. 1/6 W, 1/8 W (refer to
parts list).
Chip resistors are me W.
K: KQ (10009), M: MD (1000KQ)
) All capacitance values are in (AF. (P: PF).
All inductance values are in pH, (m: mH).
) All diodes are 188133, MA165 or 1N4148M (refer to parts
list).
Note: The Parts Number, value and rated voltage etc. in
the Schematic Diagram are for references only.
When replacing the parts, refer to the Parts List.

hem

2. Indications of control voltage
AUX : Active at high.

AUX or AUX(L) : Active at low.

3. Interpreting Connector indications

Removable connector

Wire soldered directly on board

Non-removable Board connector

@-

Board to Board

MEI

WW

Connected pattern on board
3 The arrows indicate signal path

Note: For the destination of each signal and further line
connections that are cut off from the diagram,
refer to "BOARD INTERCONNECTIONS"

4. Voltage measurement

1) Regulator (DC/DC CONV) circuits
REC : Colourbar signal.
PB : Alignment tape (Colour bar).
- : Unmeasurable or unnecessary to measure.
4) Indication on schematic diagram
Voltage Indications for REC and PB mode on the sche-
matic diagram are as shown below.

REC mode4>25 1.8
(5.0)

LPB and REC modes
(Voltage of PB and REC modes

PB mode
are the same)

Note: If the voltages are not indicated on the schematic
diagram, refer to the voltage charts.

5. Signal path Symbols
The arrows indicate the signal path as follows.
NOTE :The arrow is DVC unique object.

C> Playback signal path

C} Playback and recording signal path

» Recording signal path
(including E-E signal path)

I:>[> Capstan servo path
-> Drum servo path

(Example)
|:> RN Playback R-Y signal path

- Y RecordingY signal path

6. indication of the parts for adjustments
The parts for the adjustments are surrounded with the circle as

shown below.

7. Indication of the parts not mounted on the circuit board
OPEN" is indicated by the parts not mounted on the circuit
board.

R216

ww-

OPEN

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