Practical guide to chassis repair - Free
Practical guide to chassis repair - Free
Practical guide to chassis repair - Free
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<strong>Practical</strong> <strong>guide</strong> <strong>to</strong> <strong>chassis</strong> <strong>repair</strong><br />
Au<strong>to</strong>matic Dual Frequency (15 – 25 kHz)<br />
Defect:<br />
• No power, check :<br />
1. Main filter T101.<br />
2. NTC1.<br />
POWER SUPPLY (Fig. 9)<br />
• F101 open circuit, check :<br />
1. Diode D101 – D102 – D103 – D104 = BY254.<br />
2. Electrolytic Capaci<strong>to</strong>r C100 = 220 µF 400 V.<br />
3. PTC1.<br />
• No or low power, dry the joints in the switching area and check:<br />
1. Integrated Circuit IC101 = UC3842.<br />
2. Transis<strong>to</strong>r MOSFET Q101 = W7NA80.<br />
3. Diode D125 = BY299.<br />
4. Transis<strong>to</strong>r MOSFET Q126 = IRF644.<br />
5. Diode D109 = Zener 15V ½ W.<br />
6. Resis<strong>to</strong>r R112 = 0.82 Ω ½ W.<br />
7. Resis<strong>to</strong>rs R113 – R114 = 1 Ω ½ W.<br />
Via Nuova Poggioreale 163 A/B 16 Tel: 0039 / 081281582<br />
80143 Napoli (Italy) www.gevin.com Fax: 0039 / 0815546641
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