GPX TVR950 Manual de usuario
S/M No. :
Service Manual
Model : TVR950
July .2002
VIDEO CASSETTE RECORDER
4-HEAD RECORDER / Hi-Fi STEREO / REMOTE CONTROL
1
TABLE OF CONTENTS
SPECIFICATION ........................................................................................
WAVEFORMS ............................................................................................
CIRCUIT DIAGRAM ..................................................................................
POWER SUPPLY SCHEMATIC DIAGRAM ...........................................................
SERVO/SYSCON SCHEMATIC DIAGRAM ...........................................................
VIDEO/AUDIO SCHEMATIC DIAGRAM(4HEAD) ..................................................
VIDEO/AUDIO SCHEMATIC DIAGRAM(Hi-Fi) ......................................................
PIF SCHEMATIC DIAGRAM(4HEAD) ....................................................................
PIF & MPX SCHEMATIC DIAGRAM(Hi-Fi) ............................................................
PCB CIRCUIT BOARD ..............................................................................
INSTRUMENT DISASSEMBLY .................................................................
ELECTRICAL PARTS LIST ......................................................................
BS MODEL PART LIST ...........................................................................................
MODEL LIST & OPTION TABLE .............................................................................
*APPENDIX
TROUBLESHOOTING GUIDES ...............................................................
POWER CIRCUIT ....................................................................................................
SERVO/SYSCON/LOGIC CIRCUIT .........................................................................
VIDEO CIRCUIT .......................................................................................................
AUDIO CIRCUIT (Hi-Fi MODEL) .............................................................................
AUDIO CIRCUIT (4HEAD MODEL) .........................................................................
2
3
7
13
14
19
1
7
8
9
10
11
12
19
38
1
2
9
13
18
2
SPECIFICATION
Note: Specifications are subject to change without notice.
Power Input 120 Volts AC 60Hz
Power Consumption 17 Watts (4-head Hi-Fi)
Operating Temperature 5 degree C to 40 degree C (41 degree F to 104 degree F)
Storage Temperature -30 degree C to 65 degree C (-22 degree F to 149 degree F)
Weight 6.6 Ibs : Net (8.8 Ibs : Gross)
Dimensions 14.2 X 3.6 X9.4 Inches
Recording System
4-head Hi Fi: Four video record/playback heads Rotary helical scan
Luma: FM recording
Chroma: converted subcarrier phase shifted recording
Two audio record/playback heads
Rotary helical scan, 2 channels FM recording
Rotary helical scan
Video Signal EIA standard; NTSC color
Antenna 75 ohm input impedance
Video Signal Level 1Vp-p (140 IRE standard)
Audio Input Impedance More than 47K ohm
Audio Output Impedance Less than 1.5K ohm
Tape Speed SP: 33.35mm/sec.
SLP: 11.13mm/sec
Maximum Recording Time T-60: 3 hours/ EP (SLP) mode
T120: 6 hours/ EP (SLP) mode
Fast Forward/Rewind Time < 130 sec (T-120 tape)
Tuning System Auto Program/Cable Compatible/Frequency Synthesis (FS)
3
WAVEFORMS
1. LUMA / CHROMA WAVEFORMS
(IC301-57) 5Vp-p
1V/2msec/cm
REC
(IC301-57)5Vp-p
1V/2msec/cm
PLAY
(IC301-20) 520mVp-p
200mV/5usec/cm
REC
(IC301-20) 520mVp-p
200mV/5usec/cm
PLAY
(IC301-22) 520mVp-p
100mV/5usec
REC
(IC301-22) 520mVp-p
100mV/5usec
PLAY
(IC301-14) 650mVp-p
200mV/2msec/cm
PLAY(SP) VIDEO SW TRIG
(IC301-14) 450mVp-p
200mV/2msec/cm
PLAY(SLP) VIDEO SW TRIG
(IC301-36) 300mVp-p
100mV/5usec/cm
REC
(IC301-36)300mVp-p
100mV/5usec/cm
PLAY
(IC301-25) 4.6Vp-p
2V/10usec/cm
REC/PLAY
(IC301-25) 4.6Vp-p
2V/10usec/cm
PICTURE SEARCH
(IC301-26) 2.2Vp-p
500mV/5usec/cm
REC
(IC301-26) 2.2Vp-p
500mV/5usec/cm
PLAY
(IC301-49) 450mVp-p
200mV/0.1usec/cm
1. 1. 2. 2.
3.3.
5.
7. 7. 8.
5. 6. 6.
4. 4.
4
WAVEFORMS
2. SERVO WAVEFORMS
SER
V
O
W
A
VEFORMS
(IC601-38) 2.6Vp-p
0.5V/0.1 sec/cm
REC/PLAY
(IC601-18) 5Vp-p
2V/5msec/cm
REC/PLAY
(IC601-77) 5Vp-p
sec/cm
REC/PLAY
(IC601-76) 5Vp-p
sec/cm
REC/PLAY
(IC601-94) 3Vp-p
1V/5msec/cm
REC
(IC601-97) 4.4Vp-p
1V/5msec/cm
PLAY
(IC601-90) 25Vp-p&5Vp-p
1V/5msec/cm
REC/PLAY
(IC601-87) 2.5Vp-p
1V/0.2msec/cm
REC/PLAY
14.
18. 22.
20. 21.
15. 16. 17.
5
WAVEFORMS
3. AUDIO WAVEFORMS
AUDIO W
(IC301-76) 120mVp-p
20mV/0.5msec/cm
REC
(IC301-10) 1.5Vp-p
0.5V/0.5msec/cm
REC
(IC301-9) 2.5Vp-p
0.5V/0.5msec/cm
REC
(IC301-2) 120mVp-p
50mV/0.5msec/cm
PLAY
(Q203-C) 7.0Vp-p
10V/20 sec/cm
REC
9. 10.
13.
11. 12.
6
WAVEFORMS
4. Hi-Fi AUDIO WAVEFORMS
(IC251-9) 120mVp-p
20mV/0.5msec
EE/REC/PLAY
(IC251-19) 250mVp-p
50mV/0.5msec
EE/REC
(IC251-21) 1.4Vp-p
0.5V/1msec
REC
(IC251-29) 600mVp-p
0.2V/2msec
PLAY
(IC251-32) 250mVp-p
50mV/0.5msec
EE/REC
(IC251-57) 1.4Vp-p
0.5V/0.5msec
EE/REC
23.
27. 28.
24. 25. 26.
7
CIRCUIT DIAGRAM
1. POWER SUPPLY SCHEMATIC DIAGRAM
8
CIRCUIT DIAGRAM
2. SERVO/SYSCON SCHEMATIC DIAGRAM
9
CIRCUIT DIAGRAM
3. VIDEO/AUDIO SCHEMATIC DIAGRAM( 4HEAD )
Tabla de contenidos
