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HT-R430 OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
[When] 1. Exchange power transistors (Q6050 - Q6065). 2. Exchange power amplifier PC board ass'y (NAAF-8523). 3. Exchange thermal sensor PC board ass'y (NAETC-8526). [Procedure] <Note> No output. No input. Output sensor 1. Press and the hold down the CD button, then press the STANDBY/ON button when the unit is Power ON. " Test - _ " is displays it only for 5 seconds.
Te st - _
Blinks
2. Press the VIDEO 3 button, while the character of " Test - _ " is displayed. Unit will be in the state of " Test-4-00 ".
Te st - 4- 00
3. Repeatedly press TONE+ button until the character of " Test-4-37 " is displayed.
Te st - 4- 37
4. Adjusts MASTER VOLUME to Max. position. At this time, check the character of " FM STEREO " displayed. And, check relay RL6901 and RL6902 are turned off in 2 - 3 seconds. FM STEREO
Te st - 4- 37
5. Press the STANDBY/ON button.
Turn off
Clear
Thermal sensor
1. Press and hold down the DISPLAY button, then press the STANDBY/ON button when the unit is power ON. " V er. 0.5 0/0 5131a " is displays it only for 2 seconds. <Ex.>
V er. 0.50/05131a
2. Press the TONE button, while the character of " Ver.0.50/05131a " is displayed. <Ex.>
T: 25 C/ 77 F
3. Check the displayed temperature is +/-20 C of the ambient temperatures. 4. Press STANDBY/ON button.
Turn off
Clear
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