jedyne do czego mogę mieć zastrzeżenie to jakość zdjęć zawartych w przesłanej instrukcji serwisowej ponieważ są fatalnej jakości, praktycznie nieczytelne. tak poza tym jestem zadowolony to jest to czego szukałem.
Instrukcja jest OK. Schematy czytelne, opisane niektóre procedury.
Tekstowy podgląd strony 59 (kliknij aby zobaczyć)
HT-R557 OPERATION CHECK-2
SPEAKER PROTECT-2 (CURRENT DETECTION)
[When] 1. Exchange power transistors (Q6050 - Q6054, Q6060 - Q6064). 2. Exchange amplifier PC board ass'y (NAAF-8779). <Note> 1. No input. 2. Do not check two or more channels at the same time. 3. Do not connect a dummy load to speaker terminal longer than 2 seconds. [Procedure] 1. Press and hold down CD button, then press STANDBY/ON button while the unit is powered on. " Test - _ " is displayed only for 5 seconds.
FL display
T e st - _
Blinks
2. Press AUX button, while " Test - _ " is displayed. The unit will be in the state of " Test-4-00 ".
T e st - 4- 00
3. Repeatedly press + (TONE) button until " Test-4-35 " is displayed.
T e st - 4- 35
4. Connect the dummy load of 3 ohms to the Front L ch speaker terminals. At this time, check that the speaker relay is not turned off.
T e st - 4- 35
5. Connect the dummy load of 1 ohm to the Front L ch speaker terminals. At this time, check that the speaker relay is turned off and " Protect " is displayed.
P rotect
Disconnect the dummy load immediately after checking the display of " Protect ".
T e st - 4- 35
6. Check other channels according to the same procedure as 4 and 5. 7. Press the STANDBY/ON button.
