SHARP VC-A411M
Manual de Servicio

NO.22 FLOW CHART NO.23
(E-E mode is normal). Replace IC651. terminal voltage (REC AGC. ADJ.) pin(37) Is the pin(29) of IC651 about 3.7V? Is there signal inputted at each of IC651 normal? terminal of IC651 as shown in table? NO
YES Check Hi-Fi REC CTL line. NO L-ch R-ch NO YES

No E-E heard. Hi-Fi sound cannot be recorded

record FM signal output the pins(21) Is voltage 5V applied to pin(25) of IC651.
NO Check the peripheral circuit of rear (24) (ch-1)/pins(21) and (22) (ch-2) of IC651?

input terminal. Tuner audio terminal pin(48) Tuner? Check the AH-MZ connector.
YES NO Is there SIF signal from pin(24) of Check line of Hi-Fi 5V.

Rear input terminal pin(14) pin(9) NO

YES

Is voltage applied to pin(40) NO Check the regulator circuit of Hi-Fi 5V IC651, 9V applied to pin(58). and PC 9V.
FLOW CHART NO.24 (E-E mode is normal). Replace IC651.
NO

YES Hi-Fi sound cannot be played back

Are serial data and clock signal at NO Check line between pins(43), (42) of YES pins(43), (42) IC651 and pins(17), (18) IC701. playback envelope signal output to Is A-H.SW.P input into the pin(27) of IC651?
pins(29) and (30) of IC651? (300 mVp-p) NO
YES Check A-H.SW.P. line from the pin(27) of

YES NO Check line between pin(36) of IC651

Replace IC651. IC651 to the pin(26) of IC701.

Is "L" level applied at pin(36) of IC651? and pin(21) of IC701.
FLOW CHART NO.25
NO

47
Recording in linear audio is impossible (Hi-Fi E-E mode is normal). Is Sub carrier signal (3.58MHz, about

YES

Is "H" level applied at pin(28) of IC651? 900mVp-p) input to pin(45) of IC651?
NO to the pin(8) of IC201. YES

NO Check line between the pin(61) of IC651 Is audio signal input into the IC201 pin(8)? YES

Check line between emitter of Q501 NO Check the periphery pin(99) of IC201. (R617)

and pin(28) of IC651.
YES

Is the pin(99) of IC201 in "L" level? Does operate Check the bias oscillation circuit (T601, Q602,
YES RF output terminal : Is there audio signal outputted at pin(59) of IC651? NO

Line output terminal : Is there audio signal outputted at pins(53) and (57) of IC651? normally? Q603).
NO YES

Is audio on which bias signal is

superposed output to the pin(4) of IC201?

Replace IC651. YES
Check the AA-MH harness and A/C head.

Line output terminal : Check line ranging from pins(53) and (57) of IC651 to the audio

output terminal.

RF output terminal : Check line ranging from pin(59) IC651 to pin(2) of tuner (TU101).

VC-A411M VC-H811M