Yamaha htr-5890 Manuel d'entretien - Page 33
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- 1. Table of Contents
- 2. Service Manual
- 3. Important Notice
- 4. To Service Personnel
- 5. Front Panel
- 6. Remote Control Panel
- 7. Rear Panels
- 8. Specifications
- 9. Internal View
- 10. Disassembly Procedures
- 11. Updating Firmware
- 12. Self Diagnosis Function (Diag)
- 13. Amp Adjustment
- 14. Display Data
- 15. IC Data
- 16. Remote Control
I AMP ADJUSTMENT
Confirmation of Idling Current of Amp Unit
• Right after power is turned on, confirm that the voltage
across the terminals of R319 (FRONT Lch), R320
(FRONT Rch), R325 (CENTER), R326 (SURROUND
Lch), R327 (SURROUND Rch), R321 (SURROUND
BACK Lch), R322 (SURROUND BACK Rch) are
between 0.1mV and 10.0mV.
• If it exceeds 10.0mV, open (cutoff) R291 (FRONT Lch),
R 2 9 2 ( F R O N T R c h ) , R 2 9 5 ( C E N T E R ) , R 2 9 6
(SURROUND Lch), R297 (SURROUND Rch), R293
(SURROUND BACK Lch), R294 (SURROUND BACK
Rch) and reconfirm the voltage.
0.1mV ~ 10.0mV
(DC)
R319 (FRONT Lch)
R320 (FRONT Rch)
R325 (CENTER)
Cut off
R291 (FRONT Lch)
R292 (FRONT Rch)
R295 (CENTER)
R296 (SURROUND Lch)
R297 (SURROUND Rch)
R293 (SURROUND BACK Lch)
R294 (SURROUND BACK Rch)
Attention
If the idle current exceeds 10.0mV after an amplifier
repair, first check for a defective component before
cutting the bias resistor.
• Confirm that the voltage is 0.2 mV ~ 15.0 mV after 60
minutes.
0.1mV ~ 10.0mV
(DC)
R326 (SURROUND Lch)
R327 (SURROUND Rch)
R321 (SURROUND BACK Lch)
R322 (SURROUND BACK Rch)
MAIN (2) P. C. B.
MAIN (3) P. C. B.
R319
R291
R321
R293
R325
POWER (3) P. C. B.
R326
R295
MAIN (4) P. C. B.
HTR-5890
R292
R322
R320
R294
R327
R296
R297
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