Onkyo DTR-6.4 Service Manual

Service Bulletin 04004

MODELS : DTR-6.4,DTR-5.4

SUBJECT : The contents of memory return to the initial value or the control keys cannot operate.

Symptom: The contents of memory return to the initial setting or the control keys cannot operate.(In this case, please pull out and re-supply a power
cord at once (reset microprocessor), and confirm whether the contents of a memory have disappeared.)

Cause: Noise may join on the line of a clock and data from main microprocessor to a sub microprocessor, and a product may become the

symptom above.

Procedure for service: Replace the filters of R7095 and R7096 on the DSP printed Circuit Board NADG-7952. Replace with new part number 230955R2.

CIRCUIT NO. PART NAME SPEC. AFTER CHANGE NEW PART NO. AFTER

CHANGE

SPEC. BEFORE CHANGE ORIGINAL PART NO. BEFORE

CHANGE

R7095,R7096 EMI FILTER BK1608HS102-T 230955R2 BK1608LM182-T 230958R1

6/21/04