Panasonic AG-MD830E Service Manual

4-3-29. Hi-Fi AUDIO HEADSWITCHING SHIFTER ADJ.BOARD AUDIO C.B.A.TP TP4501 (C-1), TP4502(C-1)ADJ VR4507 (D-1 )TAPE VFM8180HADH PORTION: 2INPUTMODE PLAYM.EQ OSCILLOSCOPESPEC SEE FIGURE E281. Connect the oscilloscope to TP4502 (FM H.SW)for CH 1 and TP4501 (FM ENV) for CH2.2. Playback the alignment tape (VFMB1BOHAOH)portion 1.3. Adjust VR4507 so that there is no drop-out whilepush the Tracking buttons ("+" or "_") as shown inFigure E2B.TP4502(FM HEAD SW)TP450_'1_______1______t NO DROP-OUT tFigure E2B4-3-30. Hi-Fi AUDIO CARRIERFREQUENCY ADJ.BOARD FM AUDIOTP Pin25iCHll, Pin2'!(CH~ of FM AUDIO PACKADJ VR4405 (CH1 )(F-2) , VR4402 (CH2)(E-4)TAPEINPUT NO SIGNALMODE STOPM.EQ FREQUENCY COUNTERSPEC 1.4MHz±1 OKHziCH111.8MHz±1 OKHz(CH2)[SET UP]HI-FI REC: ON (OSO)1. Ground the Audio Inputs (CH1, CH2).2. Counect a counter to pin2S of FM Audio Pack.3. Adjust VR440S (CH1) so that the frequencybecomes 1.4MHz ± 10KHz.4. Connect a counter to pin24 of FM Audio Pack.5. Adjust VR4402 (CH2) so that the frequencybecomes 1.BMHz ± 10KHz.4-3-31. Hi-Fi AUDIO DEVIATION ADJ.BOARD FM AUDIOTP AUDIO OUTPUTlCH1, CH2)ADJ VR4407.iCHlliE-11 VR44011CH?lTAPE SELF RECORDED TAPEINPUT 1KHz, -8dBv SINEWAVEMODE PLAYM.EQ V.T.V.M or OSCILLOSCOPESPEC -8dBv + O.5dBv[SET UP]HI-FI REC ONAUDIO OUT Hi-Fi1. Set the Hi-Fi audio level control VR (CH1, CH2)on the Front Panel to the center click position.2. Supply 1KHz, -BdBv sinewave signal to the audioinputs (CH1, CH2).3. Record it for a few minutes.4. Playback the recorded portion.5. Connect a scope to the Audio outputs (CH1, CH2).6. Adjust VR4407 (CH1) so that the level becomes-BdBv ± O.SdBv.7. Adjust VR4401 (CH2) so that the level becomes-BdBv ± O.SdBv.4-13~zw~I-en::::>....,c«..J«()a:I-()W..JW