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The service manual is a good quality scan of the Panasonic NV-850, which is electrically identical to the Philips VR 6920, but mecanically just nearly.
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The service manual is a good quality scan of the Blaupunkt RTV-404, which is electrically and mecanically identical to the Panasonic NV-830.
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completo manual bien detallado y de buena calidad de impresion , se echa en falta los esquemas de placa y parte de algun diagrama.
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perfecto manual ,completo y detallado de muy buena calidad de impresion, ideal en una palabra.
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un manual completo con una calidad de imagen buena con explicaciones en varios idiomas de los ajustes y detalles en conjunto un OK.
NO.10 FLOW CHART NO.11
VC-GA35ZP VC-GA55ZP VC-GH95ZP
The cassette tape fails to eject. No power is turned on.
See FLOW CHART NO.12.
pin(4) of IC701 change from "L" to
YES
Does the capstan motor start when NO Check IC701. the EJECT button is pressed? "H" level?
NO Does power control(H) signal at
YES
Does the take-up turn when NO disk reel drive unit. Does base of Q951 change from NO Check IC701 and all the way up thru the capstan motor is running? about 5.0V 4.5V? to Q951. Check take-up reel sensor and all NO Are pulses applied at pin(2) of IC701
YES
YES
way up thru to IC701. Check Q951 and the AT 5V line. when the take-up reel disk is turning? Q951?
Is 5V sent out the collector of
YES
NO
Check pin(90) of IC701. soldering. pin(12) of IC706 when a reel pules
Check peripheral circuits for poor Is a "H"(about 1.7V) level applied at
has been inputted?
YES
Check IC706.
NO Is the voltage about 10V sent out of
FLOW CHART NO.12
pin(15) of IC706?
The capstan motor fails to run. YES
Is specified voltage applied at NO Check between IC706 and all the motor terminal? way up thru to the loading motor.
40
DC given out pin(29) of IC701.
YES
YES Is the voltage more than about 2.6V NO
Check IC701.
Does the motor run? Replace loading motor.
NO
NO YES Is the supply voltage of 5V feed to
pin(8) of AC connector?
YES NO YES
Check PC 5V line.
Replace cassette cam, gear, etc.
Check between the AC connector Is the voltage more than 2.6V DC and all the way up thru to pin(29) sent in pin(4) of AC connector? of IC701. Check between the pin(92) of IC701 Is the voltage at pin(3) of AC NO and all the way up thru to pin(3) of connector 1.6~2.7V? AC connector.
YES NO Check AT 12V line and motor voltage
selector circuit. (Q955~Q956). Is the supply voltage of 12V feed to pin(5) of AC connector? YES Replace capstan motor.
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