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El manual esta muy detallado, los numeros de partes y los esquemas de despiece son correctísimos y muy claros, tanto para los técnicos experimentados como para los novatos.
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Ottima qualità grafica e completo nelle notizie. Costo abbastanza contenuto.
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Great and quick support. The maual was exactly what I was looking for and my problem
solved. Many thanks.
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Very good service Within one day i received a pdf of the users manual and electric circuits so I was able to measure the different voltages in the printed circuit and find out the fault Payment was also reliable and easy.Without the manual i could not have repaired.So thanks to "Search for a manual"
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you are doing great job guys.....my father ask me to find out the schematics of Sony KV25R1D to sort out the problem ..(he was electrical technician, and excperianced with TV and simillar stuff). finally he found the cause and change all necessary parts....now he has got working old dog..and is very happy!!... thank you all.. NB..he also saved the repair cost.
PRECAUTIONS
To prevent damage of the thermal head caused by static electricity when assembling the chassis ass'y into the unit, the following steps must be followed; 1 : Turn the power switch off. 2 : Discharge the capacitor C5(2200µF) on the PCB Z556-1. 3 : Connect the FPC of chassis ass'y into a connector CN4 of PCB Z556-1. 4 : Assemble the chassis ass'y. 5 : Turn the power switch on.
LSI1 C5
CN4
FPC
PCB Z556-1 Chassis ass'y
ADJUSTMENT
Adjustment of low battery detection circuit
Figure-4
To adjust the threshold voltage of the low battery detection circuit, the following steps must be followed; 1 : Apply 9V to the battery terminals. Multi-meter-1 2 : Press ON while holding down 3 keys SET, RETURN and FUNCTION. (Start Diagnostic Program) 3 : Press 7.(Apply the voltage Vp for printer) 4 : Apply the voltage with a power supply so that the voltage at the collector of Q1 is 6.2V+0.1 / -0V. 5 : Adjust a pot VR1 so that the voltage between pin-8 of IC4 and pin-5 of IC3 is 0 +/-0.01V.
Multi-meter-2
0 +/-0.01V 6.2V+0.1/-0V
+
Power supply
VR1 IC4 5 8 IC3 Q1
+
9V ~ 6.5V
+
Figure-5
Setting the thermal head rank
Set the thermal head rank with pads RNK1 and RNK2 on the PCB L271-1 according to the following conditions when replacing the chassis ass'y or thermal head. The head rank is indicated on FPC as following figure-6. Head rank A : RNK1=SHORT, Head rank B : RNK1=OPEN, Head rank C : RNK1=OPEN, Head rank D : RNK1=SHORT, RNK2=OPEN RNK2=SHORT RNK2=OPEN RNK2=SHORT
XXXXXXB
Head rank = B
XXXXXXB
Figure-6
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