Jvc XVN 652 SAS Service Manual

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! CHARTS AND DIAGRAMS NOTES OF SCHEMATIC DIAGRAM Safety precautions The Components indentified by the symbol 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 1/16 W. K: KΩ(1000Ω), M: MΩ (1000KΩ) 2) All capacitance values are in µF, (P: PF). 3) All inductance values are in µH, (m: mH). 4) All diodes are 1SS133, MA165 or 1N4148M (refer to parts list). 2. Indications of control voltage AUX : Active at high. AUX or AUX(L) : Active at low. 3. Interpreting Connector indicationsNote: If the voltages are not indicated on the schematic diagram, refer to the voltage charts. 12 3 2.5 (5.0)1.8 PB and REC modes (Voltage of PB and REC modes are the same) PB mode REC mode 4. Voltage measurement 1) Regulator (DC/DC CONV) circuits REC : Colour bar signal. PB : Alignment tape (Colour bar). - : Unmeasurable or unnecessary to measure. 2) Indication on schematic diagram Voltage indications for REC and PB mode on the sche- matic diagram are as shown below. 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 OPEN 1 2 3 1 2 3 1 2 3 1 4 2 3 Removable connector Wire soldered directly on board Non-removable Board connector Board to Board Connected pattern on board The arrows indicate signal path 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. CIRCUIT BOARD NOTES 1. Foil and Component sides 1) Foil side (B side) : Parts on the foil side seen from foil face (pattern face) are indicated. 2) Component side (A side) : Parts on the component side seen from component face (parts face) indicated. 2. Parts location guides Parts location are indicated by guide scale on the circuit board. Parts location are indicated by guide scale on the circuit board. LOCATION REF No. IC101 B C 6 AIC Category : IC Horizontal A zone Vertical 6 zone B : Foil side (A : Component side) C : Chip component D : Discrete component) 2-1 2-2