NAD-L70-avr-tbh200405 电路图 维修手册.pdf

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1、PAGE 1 OF 3 Technical BulletinL70 Product: DVD Receiver Hardware Technical Bulletin: L70-H2004-05 Date: June 21, 2004Subject:Fan Kit Installation Note: Previous T.B.s required: K K K K YES K K K K NO DESCRIPTION: The small ventilation fan located on the DVD mechanism, is noisy or is turning too slow

2、ly. REASON: The fan bearing is worn. SOLUTION: Replace the existing fan with the following new fan and parts. This fan is located beside the DVD mechanism. Please note that removal of the dvd mechanism is required for this change. Note, this fan only runs when the dvd input is selected. The fan kit

3、can be ordered under the number: HDMKD1245PFS2 Kit includes: Copal fan, fan bracket , CN89 Wafer R922 82 OHMS ( ORIGINALLY 100 OHMS ) R951 91 OHMS (ORIGINALLY 100 OHMS ) 1. As shown cut the supplied bracket in order to install it with the new fan. 2. Secure fan to the bracket and add some glue to th

4、e bottom of the bracket when securing to the chassis. See figure 1 and 2. Figure 1 Contact: NAD Electronics International 633 Granite Court Pickering, ON Canada L1K 3K1 Voice: 905-831-0799 FAX 905-837-6357 Cut bracket here RadioFans.CN 收音机爱 好者资料库 PAGE 2 OF 3 Technical BulletinL70 Product: DVD Receiv

5、er Hardware Technical Bulletin: L70-H2004-05 Figure 2 3. Replace R922 (100 ohms)and solder the 82 ohm resistor supplied, to one leg of the male plug and solder the other to capacitor C 905 + side. This is on the bottom of the main cpu pc board which mounts to the top of the dvd player mechanism. Fig

6、ure 3 Contact: NAD Electronics International 633 Granite Court Pickering, ON Canada L1K 3K1 Voice: 905-831-0799 FAX 905-837-6357 Glue bottom of bracket to chassis R922 on bottom of pc board 100 ohm changes to 82 ohm. Fan connector RadioFans.CN 收音机爱 好者资料库 PAGE 3 OF 3 Technical BulletinL70 Product: DV

7、D Receiver Hardware Technical Bulletin: L70-H2004-05 4. Glue connector to PCB as shown in figure4. Figure 4 5. Replace 100 Ohm R951 on the main PCB, located under the power amp heatsink and assembly, with the 91 Ohm supplied. Figure 5 Contact: NAD Electronics International 633 Granite Court Pickering, ON Canada L1K 3K1 Voice: 905-831-0799 FAX 905-837-6357 Right side of receiver Towards Front panel RadioFans.CN 收音机爱 好者资料库