Sanyo VHR-220 series Service Manual Download | Manualshive

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Summary of Contents for VHR-220 series

Page 1: ...TS 1 CIRCUIT BOARD LOCATIONS 1 1 MAIN BOARDS 1 1 2 LOCATION FOR TAPE PATH ADJUSTMENT 1 2 ELECTRICAL ADJUSTMENT 2 1 PREPARATION 2 2 2 SERVO CIRCUIT ADJUSTMENT 4 2 3 VIDEO CIRCUIT ADJUSTMENT 5 2 4 AUDIOCIRCUIT ADJUSTMENT 7 2 5 TUNER lFCIRCUIT ADJUSTMENT 7 3 DISASSEMBLY PROCEDURES 3 1 REMOVAL OF REMOTE CONTROL UNITCASE 8 EP1 EP1 L EP2 series REFERENCE No WM 531027 ...

Page 2: ...creenassist board VHR 230G 230EX 235E 25SP 25PR TM 8 VPS board VHR 220G 230G VD 1 MESECAMdet board VHR 220PS Appearanceand specifications are subjectto changewithout notice Fig 1 1 1 2 LOCATION FOR TAPE PATH ADJUSTMENT NOTE Test point TP182 and TP183 for tape path adjustment is shown in figure below For adjustment refer to the separate volume Mechanism Service Technical Information P06L018 Shieldc...

Page 3: ... 4 Connect 12 pin 8 pin and 4 pin connectors of the Relay jig to connectorsCN541 CN101 and CN201 on the CP 1 board respectively 5 Connect connector from ACE head to CN06 of the Relay jig VHJ 0084 6 After finishing the repairs and adjustments put the Flat cables A and B back to its former position When repairing the Video pre amp unit see Figs 2 1 1 and 2 1 4 1 Remove the Pre amp unit from the chas...

Page 4: ...t It is improtant that the video output signal of the IF wowcm circuit satisfies the items shown in Fig 2 1 5 Connect the white oscilloscope to the VIDEO OUTPUT terminal of the video circuit and terminate with a 75 2 load and then check the T video output signal Ir 4 b 0 7 Vp p The amplitude of the sync signal should be approxi 1 I mately 0 3 Vp p 0 3 Vp p 4 0 The amplitude of the video signal sho...

Page 5: ...VIDEO OUTPUT TP1OI RF SW pulse TP183 Video pre amp unit Location VR351 Remark W25SO01 Video signal 7654321 v sync 1 2 Press the tracking control buttons si multaneously to the tracking center position Display in the indicator panel T Adjust VR351 so that the phase of the lead ing edge of the vertical sync signal is delayed 6 5 0 5 H from the rise of the RF switching pulse waveform CN201 TP211 TP21...

Page 6: ...on VR102 VR101 VRI 03 VR104 Remark w25v031 0 05Vp p 1 Terminate VIDEO OUTPUT terminal with a 75 ohms 2 Adjust VR102 so that the level is 1 00 0 05 Vp p w25VOOI white 7 1 0 05Vp p 1 1 Terminate VIDEO OUTPUT terminal with a 75 ohms 2 Adjust VR101 so that the level is 1 00 0 05 Vp p 1 2 3 1 2 3 4 Input the PAL colour bar signal to VIDEO INPUT terminal Set the channel selector bunonstothe AV position ...

Page 7: ...t the ground of the oscilloscope to the Shield case of Video pre amp Set the channel selector buttons to the AV position and place in the SP record mode Adjust VR182 so that the signal level at the sync tip is 600 25 mVp p for models A or 500 A 25 mVp p for models B Note Follows are the applicable models and their corresponding mark Model Mark I I vHR 220 series VHR 230 series VHR 23 series VHR 25...

Page 8: ... 23 mVrms IRCUIT ADJUSTMENT There are two of the VIF unit s type and different with the model as shown in figure below do 1 Item RF AGC Input Tv broadcast Mode E E Point TV screen VR611 a RFAGC B Ic 611 Location VR611 VIF unit WPE A CP 1 board Remark I 1 2 Receive the middle electrical field 60 dB I 80 dB of the TV channel and slowly turn VR611 from the point where snow noise is present to the poi...

Page 9: ... 1 3 m7Bml Edge r A Make a space B Battery compartment Bottom case Q Upper case Fig 3 1 1 P07BO03 G GUITER PICK or Thin plastic piece Fig 3 1 2 Make a space B y GUITER plCK Hooks F Bottom case 1 Upper case Fig 3 1 3 I To make this procedure easier push the remote contro unit end C against your body Fig 3 1 4 3 Insert the GUITER PICK above mentioned into the space B as shown in Figs 3 1 3 3 1 4 and...

Page 10: ...Jan 97 13l3 HA Printed in Japan SANYO Electric Co Ltd Osaka Japan ...

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