VC-M311HM (serv.man2). Supplement service manual pages 1 to 4 — Sharp VCR Service Manual (repair manual)

Model
VC-M311HM (serv.man2)
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
26.47 KB
Type
PDF
Document
Service Manual
Brand
Device
VCR / Supplement service manual pages 1 to 4
File
vc-m311hm-sm2.pdf
Date

View Sharp VC-M311HM (serv.man2) Service Manual online

1
VC-M311HM/LM/AHM
VC-M301HM/LM
VC-M321HM(GY)
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 speci-
fied be used.
SY7J5VCA582U/
MODELS
VC-M301HM
VC-M301LM
VC-M311HM
VC-M311LM
VC-M311AHM
VC-M321HM(GY)
VIDEO CASSETTE RECORDER
 CONTENTS
Page
SPECIFICATIONS ....................................................................................................................... 3
ROM MAP .................................................................................................................................... 4
CIRCUIT DIAGRAMS .................................................................................................................. 5
REPLACEMENT PARTS LIST ..................................................................................................... 8
PACKING OF THE SET ............................................................................................................... 9
S7826VCM301HM
(SUPPLEMENT)
This service manual covers only those items that differ
from the VC-M321HM.  For further information on items not
covered by this supplement refer to the Service Manual for
VC-M321HM.
SHARP CORPORATION
VC-M301HM,VC-M301LM, VC-M311AHM
VC-M311HM, VC-M311LM
VC-M321HM(GY)
SERVICE MANUAL
2
VC-M311HM/LM/AHM
VC-M301HM/LM
VC-M321HM(GY)
PRECAUTIONS IN PART REPLACEMENT
When servicing the unit with power on, be careful of the section marked with white around it.
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 losseness.
3
VC-M311HM/LM/AHM
VC-M301HM/LM
VC-M321HM(GY)
SPECIFICATIONS
Format: VHS PAL standard
Video recording system: Two rotary heads, helical scan system
Video signal: PAL colour and I signals, 625 lines
Recording/playing time: 240 min max. with an E-240 tape (SP)
480 min max. with an E-240 tape (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: UHF Channel E21-E69 (VHF A-J channels LM models only)
RF converter output signal: UHF Channel E21-E69 (Preset to CH E36)
Power requirement: AC230V-240V, 50Hz
Power consumption: Approx. 14W (Low Power 
 1W)
Operating temperature: 5
°
C to 40
°
C
Storage temperature: –20
°
C to 55
°
C
Weight: Approx. 3.2 kg
Dimensions: 360 mm (W) x 289 mm (D) x 93 mm (H)
VIDEO
Input: 1.0 Vp-p, 75 ohm
Output: 1.0 Vp-p, 75 ohm
S/N ratio: 45 dB min. (SP mode)
Horizontal resolution: Approx. 260 lines (SP mode with Super Picture)
AUDIO 0 dBs = 0.775 Vrms
Input: Line1: –3.8 dBs, 10k ohm
Line2: –3.8 dBs, 10k ohm (VC-M321HM only)
Output: Line1: –3.8 dBs, 1k ohm
Line2: –3.8 dBs, 1k ohm (VC-M321HM only)
S/N ratio: 46 dB min. (SP mode)
Frequency responce: 80 Hz ~ 10 kHz (SP mode)
80 Hz ~ 5 kHz (LP mode)
Accessories included: 75 ohm coaxial cable
Operation manual
Infrared remote control
Batteries
As part of our policy of continuous improvement, we reserve
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.
4
VC-M311HM/LM/AHM
VC-M301HM/LM
VC-M321HM(GY)
ROM MAP
MODEL
301HM
301LM
311HM
311LM
321HM
311AHM
blank
blank
---
---
---
---
---
---
EP n**
NTSC Luminance Level
0
0
0
0
0
0
EP n**
NTSC Chrominance Level
7
7
7
7
7
7
SP n**
NTSC Luminance Level
0
0
0
0
0
0
SP n**
NTSC Chrominance Level
7
7
7
7
7
7
LP P**
PAL Luminance Level
3
3
3
3
3
3
LP P**
PAL Chrominance Level
5
5
5
5
5
5
blank
blank
---
---
---
---
---
---
SP P**
PAL Luminance Level
3
3
3
3
3
3
SP P**
PAL Chrominance Level
5
5
5
5
5
5
"0"
FIXED
---
---
---
---
---
---
JP39
A.DUB
0
0
0
0
0
0
JP38
SLOW ATR
0
0
0
0
0
0
JP37
INSTANT REPLAY
0
0
0
0
0
0
JP36
NTSC PB
0
0
0
0
1
0
JP35
NTSC SKEW
0
0
0
0
0
0
JP34
HEAD2
0
0
0
0
0
0
JP33
HEAD1
0
0
0
0
0
0
JP32
HEAD0
1
1
1
1
1
1
JP31
PDC 8 bit
0
0
0
0
1
0
JP30
L/P-5min
0
0
0
0
0
0
JP29
84 CHANNEL
0
0
0
0
1
1
JP28
R/C CODE 1
0
0
0
0
0
0
JP27
DNR
0
0
0
0
0
0
JP26
POST CODE
0
0
0
0
1
0
JP25
SAT CTL
0
0
0
0
0
0
JP24
AV LINK
0
0
0
0
0
0
JP23
Hi-Fi
0
0
0
0
0
0
JP22
SORT / CLOCK
0
0
0
0
1
1
JP21
DECODER
0
0
0
0
1
0
JP20
DOLBY SURROUND
0
0
0
0
0
0
JP19
IGR
0
0
0
0
0
0
JP18
NICAM
0
0
0
0
0
0
JP17
G-CODE 1
0
0
1
1
1
1
JP16
G-CODE 0
0
0
1
1
1
1
JP15
OEM
0
0
0
0
0
0
JP14
LP MODE
1
1
1
1
1
1
JP13
F-AV
0
0
0
0
0
0
JP12
X2 SCART
0
0
0
0
1
0
JP11
VPS 8 bit
0
0
0
0
1
0
JP10
TUNER 2
0
1
0
1
0
0
JP9
TUNER 1
1
0
1
0
1
1
JP8
TUNER 0
1
0
1
0
1
1
JP7
SYSTEM 1
0
0
0
0
0
0
JP6
SYSTEM 0
0
0
0
0
0
0
JP5
SAT SCAN
0
0
0
0
0
0
JP4
LOW POWER
1
1
1
1
1
1
JP3
SPATIALIZER
0
0
0
0
0
0
JP2
VPS/PDC
0
0
0
0
1
0
JP1
COLOUR 1
0
0
0
0
0
0
JP0
COLOUR 2
0
0
0
0
0
0
DISPLAY IN HEXADECIMAL
010 0004310
010 0004410
010 0034310
010 0034410 11A 4635B14 012 0434310
NOTATION
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Here you can view online or download Sharp VC-M311HM (serv.man2) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp VC-M311HM (serv.man2) VCR. Information contained in Sharp VC-M311HM (serv.man2) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).