Samsung SR-65NMC, SR-65KTC, SR-69NMC, SR-61KTC, SR-61NMC Temp. Control Circuit.Rotary S/W

9-5. TEMP. CONTROL CIRCUIT.(ROTARY S/W)

A. FREEZER TEMP.

※CAUTION

It is appeared the S/W cross spot of ROTARY S/W circuit ①∼⑩

Temp. control is changed KNOB of contructed ROTARY S/W in the freezer and it is possible the temp. control 1 step to 8 step.

Temp. control SETTING become partial pressure for R 501 resistance and ROTARY S/W resistance. (Row composition resistance of resistance charge to R 908 and ROTARY S/W direction)

And partial pressure is delivered to MICOM through R 503 resistance and recognited temp. control and it become SETTING to temp. contol.

Voltage or resistance charge of MAIN PCB MICOM input for SUB PCB Ass’s ROTARY S/W cross spot direction is same the below.

(When Measure the resistance charge, connector of MAIN PCB CN 30 is separated and measure the connector terminal.)

Section	1 STEP	2 STEP	3 STEP	4 STEP	5 STEP	6 STEP	7 STEP	8 STEP	WHEN OPEN
	(9PIN)	(8PIN)	(7PIN)	(6 PIN)	(5 PIN)	(4 PIN)	(3PIN)	(2 PIN)	THE OPEN SPOT
Voltage	2.77	2.94	3.12	3.33	3.57	3.84	4.16	4.54	0.1~ 0.7V
(R504)	±0.15V	±0.15V	±0.15V	±0.15V	±0.15V	±0.15V	±0.15V	±0.15V
Resistance	6.54㏀±	5.66㏀±	4.76㏀±	3.84㏀±	2.91㏀±	1.96㏀±	0.99㏀±	0Ω	100㏀±1%
(CN30⑥~⑦)	1%	1%	1%	1%	1%	1%	1%

※To upside, when measure the resistance charge isn’t appeared the resistance in the case SUB PCB ASSY connection is disconnection or crack situation of PCB board.

－30－