Sharp rt xv 300 h service manual

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RT-XV300H

SHARP SERVICE MANUAL

o o o

Do-

No. S4727RTXV300H

RT-XV300H

. Dolby noise reduction manufactured under license from _ _
Dolby Laboratories Licensing Corporation. - In the Interests of user-safety the set should be restored to Its
DOLBY and the double-D symbolDCI are trademarks of original condition and only parts identical to those specified

0 Dolby Laboratories Licensing Corporation. Should be used.

IMPORTANT SERVICE NOTES (FOR UK ONLY) .................
WIRING OF PRIMARILY SUPPLY LEADS (FOR UK ONLY)
SPECIFICATIONS
NAMES OF PARTS .
DISASSEMBLY..
ADJUSTMENT
BLOCK DIAGRAM
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD.
FUNCTION TABLE OF IC ................................................
NOTES ON SCHEMATIC DIAGRAM .
TYPES OF TRANSISTOR AND LED..
REPLACEMENT PARTS LIST/ EXPLODED VIEW
PACKING OF THE SET (FOR UK ONLY)

SHARP CORPORATION

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FIT-XV300H

ADJUSTMENT
MECHANISM SECTION Adjusting the deck circuit
- Driving Force Check ~ Checking the bias oscillation frequency
Torque Meter Specified Value Adjusting object Set value Connection
Play: TW-2412 80 g or more - 85 i7kHZ TP101 (D or (5)
Reverse Play: TW-2422 80 g or more
~ Checking the bias current
~ Checking the playback/FF/rewinding torque Adi5ti"9 Obie Set value connecim
Torque Meter Specified Va|ue L: VR105 Standard: 15 i 3 mV L: TP101 (D
PIay:TW-2111 25 to 65 g. cm R.VR106 R'TP101®
Reverse Play: TW-2121 25 to 65 g.cm - Adjusting the playback amplifier sensitivity
Fast torward: TW'2231 60 I0 130 9 Test Tape Connection Set value Connection
ReWindi TW'223 6° 0 130 9 MTT-150 L: VR101 Standard: ssomv L:TP102 a)
R: VR102 R: TP102 @
- Adjusting the record/playback head azimuth - Adjusting the record/playback amplifier sensitivity
Test Tepe Connection Test Tape Connection Set value Connection
MTT -114 Output: Li TP102® R1 TP1°2 @ UR-121 Record level control 200mV |nput:AUX
1kHz
Raise the cassette holder cover and remove it , and then L: VR103 20mm, (OutpuI:
adjust the azimuth. R; vmo4 L: TP102 (D
R: TP102 ©

TP101 pin ® or pin @

Record mode

560k!) Electronic voltmeter
Unit W»
m a
560:2
O

GND (TP101pin @)

Figure 5-1 BIAS CURRENT

VR101 L-Ch
I- P. B. AMP.SENS.

L-ch +I

TP102 REC. AMP.SENS.

9 L_Ch vmos
to GND
@ GND 53$
(9 R-ch VR104 FI-ch [53863.
2
.« REC. AMP.SENS. TP101

R-ch
- L-ch @ ® R-ch
P. B. AMP.SENS. VR102 BIAS VRQ Q06 BIAS

MAIN PWB

Figure 5-2 ADJUSTMENT POINTS

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