Onkyo TX-8250 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-8250 Specifications

General

Type	Stereo Receiver
Channels	2
THD+N (Total Harmonic Distortion + Noise)	0.08%
Frequency Response	10 Hz - 100 kHz
Signal-to-Noise Ratio	106 dB
Speaker Impedance	4 - 16 ohms
Phono Input	Yes (MM)
Speaker Outputs	A/B
Ethernet	Yes
Wi-Fi	No
FM/AM Tuner	Yes
Standby Power Consumption	0.15 W
Digital Audio Inputs	Optical (2), Coaxial (1)
Analog Audio Inputs	RCA (4)
Audio Outputs	1 Subwoofer Pre-Out
USB	Yes
Bluetooth	Yes
Streaming Services	Tidal, Deezer, Spotify
Dimensions (W x H x D)	435 x 328 mm