Read Sharp VC-ME80HM Service Manual online
1
VC-ME80GM
VC-ME80HM
VC-ME80HM
SERVICE MANUAL
VIDEO CASSETTE RECORDER
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
should be used.
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
should be used.
MODELS VC-ME80GM/ME80HM
S98X7VC-ME80G
MODELS
SERVICE MANUAL
CONTENTS
Page
1. SPECIFICATIONS ................................................................................................................. 3
2. DISASSEMBLY AND REASSEMBLY ................................................................................... 4
2. DISASSEMBLY AND REASSEMBLY ................................................................................... 4
2-1 DISASSEMBLY OF MAJOR BLOCKS ............................................................................ 4
2-2 DISASSEMBLING THE MECHANISM/MAIN PWB ASSEMBLY .................................... 5
2-3 CARES WHEN REASSEMBLING ................................................................................... 6
2-2 DISASSEMBLING THE MECHANISM/MAIN PWB ASSEMBLY .................................... 5
2-3 CARES WHEN REASSEMBLING ................................................................................... 6
3. FUNCTION OF MAJOR MECHANICAL PARTS ................................................................... 7
4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS .................. 9
4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS .................. 9
4-1 MECHANISM CONFIRMATION ADJUSTMENT JIG ...................................................... 9
5. ELECTRICAL ADJUSTMENT ............................................................................................. 29
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE .............. 33
7. ELECTRICAL TROUBLESHOOTING ................................................................................. 39
8. BLOCK DIAGRAM ............................................................................................................... 55
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN ......................................................... 67
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE .............. 33
7. ELECTRICAL TROUBLESHOOTING ................................................................................. 39
8. BLOCK DIAGRAM ............................................................................................................... 55
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN ......................................................... 67
10. REPLACEMENT PARTS LIST ............................................................................................ 99
11. EXPLODED VIEW OF MECHANICAL PARTS ................................................................. 118
12. PACKING OF THE SET .................................................................................................... 122
11. EXPLODED VIEW OF MECHANICAL PARTS ................................................................. 118
12. PACKING OF THE SET .................................................................................................... 122
VIDEO CASSETTE RECORDER
SHARP CORPORATION
VC-ME80GM
VC-ME80HM
VC-ME80HM
VC-ME80GM
VC-ME80HM
VC-ME80HM
SHARP
2
VC-ME80GM
VC-ME80HM
VC-ME80HM
PRECAUTIONS IN PART REPLACEMENT
When servicing the unit with power on, be careful to the section marked white all over.
This is the primary power circuit which is live.
When checking the soldering side in the tape travel mode, make sure first that the tape has been loaded and then turn over
the PWB with due care to the primary power circuit.
Make readjustment, if needed after replacement of part, with the mechanism and its PWB in position in the main frame.
(1) Start and end sensors : Q701 and Q702
Insert the sensor's projection deep into the upper hole of the holder. Referring to the PWB, fix the sensors tight enough.
(2) Photocoupler : IC901
Refer to the symbol on the PWB and the anode marking of the part.
(3) Cam switches A and B : D708 and D705
Adjust the notch of the part to the white marker of the symbol on the PWB. Do not allow any looseness.
(4) Take-up and supply sensors : D711 and D712
Be careful not to confuse the setting direction of the parts in reference to the symbols on the PWB. Do not allow any
looseness.
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VC-ME80GM
VC-ME80HM
VC-ME80HM
1. SPECIFICATIONS
Format: VHS PAL standard
Video recording system: Two rotary heads, helical scan system
Video signal: PAL/SECAM colour and B/G signals, 625 lines (VC-ME80GM)
PAL colour and I signals, 625 lines (VC-ME80HM)
Recording/playing time: 240 min max. with SHARP E-240 tape (PAL/SP)
480 min max. with SHARP E-240 tape (PAL/LP)
Tape width: 12.7mm
Tape speed: 23.39 mm/s (PAL/SP)
11.70 mm/s (PAL/LP)
Antenna: 75 ohm unbalanced
Receiving channel: VHF Channel E2-S41 (VC-ME80GM Only)
UHF Channel E21-E69
RF converter output signal: UHF Channel E21-E69 (Preset to CH E36)
Power requirement: AC230V, 50Hz (VC-ME80GM), AC230V~240V, 50Hz (VC-ME80HM)
Power consumption: Approx. 19 W (VC-ME80GM), Approx. 19 W (AC240V/50Hz) (VC-ME80HM)
Operating temperature: 5
°
C to 40
°
C
Storage temperature: –20
°
C to 55
°
C
Weight: Approx. 4.5 kg
Dimensions: 430 mm (W) x 290 mm (D) x 92 mm (H)
(16-15/16" x 11-7/16 " x 3-5/8")
VIDEO
Input: 1.0 Vp-p, 75 ohm
Output: 1.0 Vp-p, 75 ohm
S/N ratio: 45 dB (SP mode)
Horizontal resolution: Approx. 260 lines (SP mode with Supper Picture)
AUDIO 0 dBs = 0.775 Vrms
Input: Line1: –3.8 dBs, 10k ohm
Line2: –3.8 dBs, 10k ohm (VC-ME80HM Only)
Line3: –3.8 dBs, 47k ohm (VC-ME80HM Only)
Line3: –3.8 dBs, 47k ohm (VC-ME80HM Only)
Output: Line1: –3.8 dBs, 1k ohm
Line2: –3.8 dBs, 1k ohm (VC-ME80HM Only)
REAR RCA: –3.8 dBs, 1k ohm (VC-ME80HM Only)
REAR RCA: –3.8 dBs, 1k ohm (VC-ME80HM Only)
S/N ratio: 46 dB min. (SP mode)
Frequency responce: 80 Hz ~ 10 kHz (SP mode)
80 Hz ~ 5 kHz (LP mode)
Hi-Fi Dynamic range: 90 dB TYP
Hi-Fi WOW and flutter: 0.005% Max.
Hi-Fi Frequency responce: 20 Hz ~ 20 kHz
Hi-Fi Distortion: 0.5% Max.
Hi-Fi Closs talk (at 1kHz): 55 dB min.
Accessories included: 75 ohm coaxial cable
Operation manual
Infrared remote control
Battery
Infrared remote control
Battery
As part of our policy of continuous improvement, we reserve
the right to alter design and specifications without notice.
the right to alter design and specifications without notice.
Note: The antenna must correspond to the new standard DIN 45325
(IEC 169 - 2) for combined UHF/VHF antenna with 75 ohm connector.
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VC-ME80GM
VC-ME80HM
VC-ME80HM
2. DISASSEMBLY AND REASSEMBLY
2-1 DISASSEMBLY OF MAJOR BLOCKS
TOP CABINET
: Remove 4 screws
1
.
FRONT PANEL
: Remove 4 screws
3
and 7 clips
4
.
MECHANISM/
: Remove 2 screws
5
, 1 screw
6
, 3
MAIN PWB
screws
7
, 1 screw
8
.
1
1
1
5
7
3
8
3
6
MAIN FRAME
FRONT PANEL
TOP CABINET
4
7
MECHANISM/
MAIN PWB
MAIN PWB