Onkyo TX-SR502E Service Bulletin

SERVICE BULLETIN
NO:04003
2004/04/21
MODELS : TX-SR502/502E/8250/HT-R520
SUBJECT : The countermeasure against IC oscillation.
Symptom:
TX-SR502's output sometimes has a hum with signals after power on within
few minutes.
When selector or DSP mode is switched to another at this moment, the protect
program starts.
Cause:
Oscillatation of IC regulator.
Procedure for service:
To exchange an electrolytic capacitor with that of 330uF for C6412 in NADG-
8230.
Circuit No. Before
change
After change
Parts No. Description Parts No. Description
C6412 394741007 ELECT C
CE04W16V10M
394743317 ELECT C
CE04W16V330M
Marking: No change
Application:
TX-SR502(B) MDD, MDC
HT-R520(B) MDD, MDC #1-
HT-R520(S) MDD, MDC #1-

Onkyo TX-SR502E Specifications

General

Channels	6.1
Audio Formats Supported	Dolby Digital, DTS, Dolby Pro Logic II
Audio Channels	6.1
Total Harmonic Distortion	0.08%
Speaker Impedance	6-16 ohms
Inputs	Digital optical: 1
Outputs	1 x composite video
Weight	10.3 kg
Input Sensitivity	200 mV
Signal to Noise Ratio	100 dB (line)
Frequency Response	10 Hz - 100 kHz