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It was magic after so many years to still be able to source this info. It was equally amazing to return my Pioneer receiver to it near new sound quality AFTER NEARLY 30 YEARS! Thank you for this ability!
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Easy and secure way to get a complete service manual of a vintage hifi component. Only some parts of the print copy are dificult to read. Nice price!
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The manual is an excellent reproduction with complete schematics, made troubleshooting and repair a simple process.
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A
If this status continues for more than 3 seconds, the power is turned off (for Standby mode). If the port becomes "L" within 3 seconds, the unit resets automatically.
If this status continues for more than 3 seconds, the power is turned off (for Standby mode). If the port becomes "L" within 3 seconds, the unit resets automatically. When the power is turned off owing to DC detection (also when a user prompted by the warning indication turns off the switch on the primary side), key inputs are disabled for 60 seconds. The microcomputer backs up the value of the 60-second timer. The unit will only enter Standby mode, and power will not be turned on within 60 seconds in response to a key input after power-off on the primary side. (When the switch on the primary side is turned on again, key inputs will be limited for 60 seconds even if the timer value is less than 60 seconds.) After DC detection, power-on from the multiroom side is also disabled for 60 seconds. If the unit resets within 3 seconds (before the power is turned off) after DC detection, the normal operation is restored.
(2) Transformer temperature rise control
Valid with European and Japanese domestic models only. European models If the temperature at the transformer rises, the TRANS_DET port becomes "H." Detecting "H," the microcomputer performs the following operations: 1. System muting on 2. Protection relays off As long as the detection port remains "H," statuses 1 and 2 are maintained. When the port becomes "L" (when the temperature at the transformer drops), statuses 1 and 2 are canceled, and the unit resets automatically (automatic reset is requested by safety regulations). The warning indication "OVER HEAT" appears on the FL display.
B
(6) Diagnostic mode
This mode is only for servicing and checking the circuit design, and not open to users. When the DNR key and VSEL key are both held pressed for 3 seconds in Standby mode, the power is turned on, and the number of times of each defect or abnormality detection is sequentially displayed on the FL display. Displayed items: � DC detection � Overload detection � Fan detection � Temperature detection Hold the DNR key and VSEL key pressed for 3 seconds in Standby mode. PROTECT DC � PROTECT OVER � PROTECT FAN � PROTECT TEMP CHECK 003 CHECK 000 CHECK 000 CHECK 000 � With models other than North American models � With North American and Japanese domestic models
(3) Temperature detection
Valid with North American and Japanese domestic models only. The process mentioned in (1) is performed with European and other general-area models.
C
If the temperature at the heat sink rises, the TEMP1 port becomes "H." Detecting "H," the microcomputer performs the following operations: 1. System muting on 2. Protection relays off The warning indication "OVER HEAT" appears on the FL display. If this status continues for more than 3 seconds, the power is turned off (for Standby mode). If the port becomes "L" within 3 seconds, the unit resets automatically.
D
(4) Overload detection (abnormality detection)
If the speaker terminals are short-circuited or low-load driving is detected, the OL_DET port becomes "H." Detecting "H" in an interrupt process, the microcomputer performs the following operations: 1. System muting on 2. All relays off (expander output off) The expander output is turned off to perform detection during the interrupt. As the AC relay is also turned off, no warning indication appears on the FL display. 3. Power off (Standby mode)
E
There is no specific mode for clearing the above-mentioned diagnostic mode. Diagnostic mode is only cleared with an all-reset operation.
(5) DC detection (defect detection)
Only DC detection is enabled 2 seconds after power-on. If there is a fault in the power amplifier or a high-level signal lower than5 Hz is input, the DC_DET port becomes "H." Detecting "H," the microcomputer performs the following operations: 1. System muting on 2. Protection relays off The warning indication "AMP ERR" appears on the FL display.
F
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VSX-49TXi
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