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Exactly what I needed to be able to bring the amp back to life... will come back to this site the next time I need schematics.
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Information was accurate and very helpful.
However the continuity made it a little difficult to follow from one page to the next.
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Very very good as usual very trustable site. Perfect!!!!!!
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The Service Manual received was helpful. Good copy of original document.. I recomend all of my friends about this technical page.
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Perfect, complete manual, exactly what I needed. Recommended to everyone.
VL-H860U VL-H880U
Q2903 with FET always is "OFF" at DC input.
Q2901
NON REG 7.2V REG circuit
Q2903
SYS 3.3V
DC JACK input
Voltage detective circuit
VDC<11V
ADP-DET
Vcc DC input lived DC input "ON"
with JACK : OPEN "OFF" detection with out JACK : GND Short circuit
Battery voltage BATT.-DET detection
7-7. MAIN BATTERY CIRCUIT SECTION BLOCK DIAGRAM
14
VBATT=0 Charging off Vcc Lithium ion battery Current Voltage circuit section section LED_R Completion : Green light up CHG SW When the battery is installed , its turned "ON". RESET CHARGE-ON_L VCR-H Charge control IC System microcomputer LED_G
Green LED Red Current control detective
Charging : Red light up
VL-H870U VL-H875U VL-H890U
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