Lenovo Flex 3 Service Manual

Lenovo Flex 3-1470/ 
Flex 3-1470 (HSW)/Flex 3-1435/
Flex 3-1475/Flex 3-1570/ 
Flex 3-1570 (HSW)/Flex 3-1535
Hardware 
Maintenance 
Manual 

Notes:
•	Before using this information and the product it supports, be sure to re\
ad the general information under 
“Notices
” on page 93.
•	 This manual applies to the following models: Lenovo Flex 3-1470/Flex 3-1\
470 (HSW)/Flex 3-1435/
Flex 3-1475/Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535. The illustrations used in this manual are for 
Lenovo Flex 3-1570 unless otherwise stated.
First Edition (Mar. 2015)
© Copyright Lenovo 2015. All rights reserved.
LIMITED	 AND	RESTRICTED	 RIGHTS	NOTICE:	 If	data...

iii
Contents
About this manual ....................................... iv
Safety information ........................................ 1
General	safety	 ................................................ 2
Electrical	safety	 .............................................. 3
Safety	inspection	guide 	.................................. 5
Handling	devices	that	are	sensitive	to	
electrostatic	discharge 	.................................... 6
Grounding	requirements 	................................. 6
Safety...

iv
About this manual
This	manual	 contains	 service	and	reference	 information	 for	the	 following 	
Lenovo	product:
Lenovo Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/  
Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
Use	this	manual	to	troubleshoot	problems.
The	manual	is	divided	into	the	following	sections:
•	 The	 common	 sections	provide	 general	 information, 	guidelines, 	and	 safety 	
information	required	for	servicing	computers.
•	 The	 product-specific 	section	 includes 	service,...

1
Safety information
Safety information
This	chapter	presents	the	following	safety	information	that	you	need	to	get	
familiar	with	before	you	service	a	Lenovo	Flex	3-1470/Flex	3-1470	(HSW)/	
Flex	3-1435/Flex	3-1475/Flex	3-1570/Flex	3-1570	(HSW)/Flex	3-1535	
computer:
•	 “General	safety”	on	page	2
•	 “Electrical	safety”	on	page	3
•	 “Safety	inspection	guide ”	on	page	5
•	 “Handling	devices	that	are	sensitive	to	electrostatic	discharge ”	on	page	6
•	 “Grounding	requirements ”	on	page	6
•	 “Safety	notices:...

2
Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/Flex 3-1570/
Flex 3-1570 (HSW)/Flex 3-1535 Hardware Maintenance Manual
General safety
Follow	these	rules	below	to	ensure	general	safety:
•	Observe	 a	good	 housekeeping	 in	the	 area	 where	 the	machines	 are	put	
during	and	after	the	maintenance.
•	 When	lifting	any	heavy	object:	
1.	 Make	sure	that	you	can	stand	safely 	without	slipping.
2.	 Distribute	the	weight	of	the	object	equally	between	your	feet.
3.	 Use	 a	slow	 lifting	 force.	 Never...

3
Safety information
Electrical safety
Observe	the	following	rules	when	working	on	electrical	equipments.
Important:
Use only approved tools and test equipments. Some hand tools have handles 
covered with a soft material that does not insulate you when working wit\
h live 
electrical currents.
Many customers have rubber floor mats near their machines that contain small 
conductive fibers to decrease electrostatic discharges. Do not use such kind of mat 
to protect yourself from electrical shock. 
•	Find...

4
Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/Flex 3-1570/
Flex 3-1570 (HSW)/Flex 3-1535 Hardware Maintenance Manual
•	Always	 look	carefully	 for	possible	 hazards	in	your	 work	 area.	 Examples	 of	
these	 hazards	 are	moist	 floors,	 nongrounded	 power	extension	 cables,	power	
surges,	and	missing	safety	grounds.	
•	 Do	 not	 touch	 live	electrical	 circuits	with	the	reflective	 surface	of	a	plastic 	
dental	 mirror.	 The	surface	 is	conductive;	 such	touching	 can	cause	 personal	
injury...

5
Safety information
Safety inspection guide
The	purpose	 of	this	 inspection	 guide	is	to	 assist	 you	in	identifying	 potential	
unsafe	 conditions.	 As	each	 machine	 was	designed	 and	built,	 required	 safety	
items	 were	installed	 to	protect	 users	and	service	 personnel	 from	injury.	 This	
guide	 addresses	 only	those	 items.	 You	should	 use	good	 judgment	 to	identify 	
potential	 safety	hazards	 according	 to	the	 attachment	 of	non-Lenovo	 features	or	
options	not	covered	by	this	inspection...

6
Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/Flex 3-1570/
Flex 3-1570 (HSW)/Flex 3-1535 Hardware Maintenance Manual
Handling devices that are sensitive to electrostatic discharge
Any	computer	 part	containing	 transistors	 or	integrated	 circuits	(ICs)	should	 be	
considered	 sensitive	to	electrostatic	 discharge	(ESD).	ESD	damage	 can	occur	
when 	there	 is	a	difference 	in	 charge	 between	 objects.	Protect	against	 ESD	
damage	 by	equalizing	 the	charge	 so	that	 the	machine,	 the	part,...