Technics SUCH 900 Schematics

User Manual: Technics-SUCH-900-Schematics

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Audio Visual email: av.technical@mail.panasonic.co.uk

Panasonic CS U.K. Document No: 01

Model: SU-CH900

1

Product Group: HiFi Mini Model: SU-CH900

Date: 14/12/99 Revision No: 01 Document No: 01

Subject: Unit Cuts Out

SYMPTOM:The unit turns off unexpectedly during normal operation and an

indication of “E“ lights on the main display.

CAUSE:One of the following may cause the cut out.

1. A defective fan motor (coil shorted, disconnected or clogged

commutator).

2. A faulty detector circuit (short or disconnection).

3. Smoothing capacitor (C571) used in fault detector circuit of

output IC is possibly dry joint. The problem is liable to occur

when the output is high.

REMEDY:1. Defective fan motor: Replace the fan motor Part No. SYE1128-4

unless the resistance across both ends of the coil is between 20

and 30 Ohms.

2. Incorrect action of fan motor circuit: Mount a capacitor across

both ends of the fan motor.

3. Poorly soldered C571, re-solder this capacitor.

NB Due to the nature of the problem, it is recommended that all of

the three remedies above are carried out simultaneously