Lenovo Flex 3 Service Manual

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Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
Table 1. Specifications (continued)
Feature Description
Audio •	 1/8"	Combo	audio	jack
•	 1.5	W	speakers	×	2
•	 Single/Array	Digital	MIC
Ethernet	(on	the	
system	board)	 •	 1,000	Mbps
Bluetooth	
wireless	 •	 Combined	in	combo	card
Keyboard •	 6	row	ISO	full	size	keyboard
Touchpad	 •	 Multi-touch	type
Integrated	
camera •	 HD/0.3	M
Battery •	 3	cells	/	2	cells,	45	Wh	/	30	Wh
AC	adapter •	 DIS	65	W,	UMA	45	W
Pre-installed	
operating	
system	 •	 Linpus	lite/DOS
•	 Windows	Mobile
•	 Windows	8.1/10(or	similar	update	in	12months) 
						

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Flex 3-1570 (HSW)/Flex 3-1535 Hardware Maintenance Manual
Status indicators
The	system	status	indicators	below	show	the	computer	status:
12
Table 2. Status indicators
IndicatorIndicator
status Meaning
1  Battery	status	indicator
On	(solid	white) The	battery	has	more	than	20%	
charge.
On	 (solid	 amber) The	battery	has	between	5%	and	
20%	charge.
Blinking	quickly	
(amber) The	battery	has	less	than	5%	
charge.
Blinking	slowly	
(amber) The	battery	is	being	charged.	
When	the	battery	charge	reaches	
20%,	the	blinking	color	will	change	
to	white.
Blinking	slowly	
(white) The	battery	has	between	20%	and	
80%	charge	and	is	still	charging.	
When	the	battery	reaches	80%	
charge	the	light	will	stop	blinking,	
but	charging	will	continue	until	the	
battery	is	fully	charged.
2  Power	status	indicator
On	(solid	white)
The	computer	is	powered	on.
Blinking The	computer	is	in	sleep	mode.
Off The	computer	is	powered	off. 
						

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Fn key combinations/Hotkeys
The	following	 table	shows	 the	function 	of	 each	 combination	 of	Fn	 with	 a	
function	key.
Table 3. Fn key combinations
Lenovo Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475
Fn + Home: Activates	the	pause	function.
Fn + End: Activates	the	break	function.
Fn + PgUp : Enables/disables	the	scroll	lock.
Fn + PgDn : Activates	the	insert	function.
Fn + Space   
(on select models): Adjusts	the	keyboard	backlight	(off	
→	dim	
→	bright	
→	off).
Lenovo Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
Fn + Home:
Activates	the	pause	function.
Fn + End: Activates	the	break	function.
Fn + PgUp : Enables/disables	the	scroll	lock.
Fn + PgDn : Activates	the	system	request.
Fn + Space   
(on select models): Adjusts	the	keyboard	backlight	(off	
→	dim	
→	bright	
→	off).
You	
can	access	 certain	system	 settings	 quickly	by	pressing	 the	appropriate 	
hotkeys.
Table 4. Hotkeys
 : Mutes/unmutes	the	sound. :Enables/disables	
Airplane	
mode.
 : Decreases	the	volume	level. :Displays	all	currently	active	
apps.
 :
Increases	the	volume	level. : Turns	on/off	the	backlight	of	
the	LCD	screen.
 :Closes	the	currently	active	
window. :Toggles	the	display	between	
the	computer	and	an	external	
device.
 :
Refreshes	the	desktop	or	the	
currently	active	window. :Decreases	the	display	
brightness.
 :Enables/disables	the	
touchpad. :Increases	the	display	
brightness. 
						

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Flex 3-1570 (HSW)/Flex 3-1535 Hardware Maintenance Manual
FRU replacement notices
This	section 	presents	 notices	related	to	removing	 and	replacing	 parts.	Read	
this	section	carefully	before	replacing	any	FRU.
Screw notices 
Loose	 screws	 can	cause	 a	reliability	 problem.	In	the	 Lenovo	 computer,	 this	
problem	 is	addressed	 with	special	 nylon-coated	 screws	that	have	 the	following	
characteristics:
•	 They	maintain	tight	connections.
•	 They	do	not	easily	come	loose,	even	with	shock	or	vibration.
•	 They	are	harder	to	tighten.
Do	the	following	when	you	service	this	machine:	
•	 Keep	the	screw	kit	in	your	tool	bag.
•	 Carefully	remove	screws	for	reuse	when	replacing	FRUs.
•	 Use	a	torque	screwdriver	if	you	have	one.
Tighten	screws	as	follows:
•	 Plastic to plastic
	 Turn	 an	additional	 90°	after	 the	screw	 head	touches	 the	surface	 of	the 	
plastic	part:
more than 90°
(Cross-section)
•	 Logic card to plastic 
	 Turn	 an	additional	 180°	after	the	screw	 head	touches	 the	surface	 of	the 	
logic	card:	
more than 180°
(Cross-section)
•	 Torque driver 
	 If	 you	have	 a	torque	 screwdriver	, 	refer	 to	the	“Torque”	column	 for	each	 step.
•	 Make	 sure	that	you	use	the	correct	 screws.	 If	you	 have	 a	torque	 screwdriver,	
tighten	 all	screws	 firmly	to	the	 torque	 shown	 in	the	 table.	 Carefully remove 
screws for reuse when replacing FRUs. Make sure that all screws are 
tightened firmly.
•	 Ensure	 torque	screwdrivers	 are	calibrated	 correctly	following	 country	
specifications. 
						

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Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
Removing and replacing an FRU
This	section	 presents	 exploded	 figures	with	the	instructions	 to	indicate	 how	to	
remove	 and	replace	 the	FRU. 	Make	 sure	to	observe	 the	following	 general	rules:
1.	 Do	 not	attempt	 to	service	 any	computer	 unless	you	have	 been	 trained	 and	
certified.	 An	untrained	person	runs	the	risk	of	damaging	parts.
2.	 Before	replacing 	any	FRU,	review	“FRU	replacement	notices ”	on	page	30.
3.	 Begin	 by	removing	 any	FRUs	 that	have	 to	be	 removed	 before	the	failing 	
FRU.	 Any	of	such	 FRUs	 are	listed	 at	the	 top	of	the	 page.	 Remove	 them	in	
the	order	in	which	they	are	listed.
4.	 Follow 	the	correct	 sequence	 in	the	 steps	 to	remove	 the	FRU,	as	 given	in	the	
figures	by	the	numbers	in	square	callouts.
5.	 When	 turning	a	screw	 to	replace	 an	FRU,	 turn	it	in	 the	 direction	 as	given	 by	
the	arrow	in	the	figure.
6.	 When	 removing	the	FRU,	 move	 it	in	 the	 direction	 as	given	 by	the	 arrow	 in	
the	figure.
7.	 To	 put	the	 new	 FRU	 in	place, 	reverse	 the	removal	 procedures 	and	 follow 	
any	 of	the	 notes	 that	pertain	 to	replacement.	 For	information	 about	
connecting	and	arranging	internal	cables,	see	 “Locations”	on	page	74 .
8.	 When	replacing	 an	FRU,	use	the	correct	screw	as	shown	in	the	procedures.
 DANGER
Before removing any FRU, turn off the computer, unplug all power cords from 
electrical outlets, remove the battery pack, and then disconnect any of the 
interconnecting cables.
Attention:	After	 replacing	 an	FRU,	 do	not	 turn	 on	the	 computer	 until	you	have	
made	 sure	that	all	screws,	 springs,	 and	other	 small	 parts	are	in	place	 and	none	
are	 loose 	inside 	the	 computer.	 Verify	this	by	shaking	 the	computer	 gently	and	
listening	 for	rattling	 sounds.	 Metallic	parts	or	metal	 flakes	 can	cause	 electrical	
short	circuits.
Attention: 	The	 system	 board	is	sensitive	 to,	and	 can	be	damaged	 by,	
electrostatic	 discharge.	Before	touching	 it,	establish	 personal	grounding	 by	
touching	 a	ground	 point	with	 one	hand	 or	using	an	 electrostatic	 discharge	(ESD)	
strap	(P/N	6405959)	to	remove	potential	shock	reasons.
Notes:
•	 The following procedures about removing and replacing FRUs are the same for the 
Lenovo Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/Flex 3-1570/
 
Flex 3-1570 (HSW)/Flex 3-1535.
•	 The illustrations used in this section are of the Lenovo Flex 3-1570, unless otherwise 
stated. 
						

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Flex 3-1570 (HSW)/Flex 3-1535 Hardware Maintenance Manual
1010 Base cover
Figure 1. Removal steps of base cover 
Remove	the	screws	1.
Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475
1
1
11
1
1
1
11
1
Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
1
1
11
1
1
1
1
1
1
1
Step
Screw (quantity) ColorTorque
1M2.0	×	6.0	 mm, 	Phillips	 head,	nylok-coated	 (10)	
LCASE	to	UCASE	(Flex	3-1470/	
Flex	3-1470	(HSW)/Flex	3-1435/Flex	3-1475) Black
2.0	kgf*cm
1M2.0	×	6.0	mm,	Phillips	head,	nylok-coated	(11) 	
LCASE	to	UCASE	(Flex	3-1570/	
Flex	3-1570	(HSW)/Flex	3-1535) Black
2.0	kgf*cm 
						

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Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
Figure 1. Removal steps of base cover (continued)
Remove	the	base	cover	in	the	directions	shown	by	arrows	 2	and	
3.
Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475
32
2
Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
32
2 
						

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Flex 3-1570 (HSW)/Flex 3-1535 Hardware Maintenance Manual
Note: Applying labels to the base cover
The	new	 base	 cover	 FRU	is	shipped	 with	a	kit	 containing	 labels	of	several 	
kinds.	When	you	replace	the	base	cover,	you	need	to	apply	the	following	labels:	
The	following	 labels	need	to	be	peeled 	off	from	the	old	 base	cover	 and	put	on	
the	new	base	cover.	
a	 Barcode	label	b	 Rating	labelc	 GML 	label	d	 BT	label	(for	US/CA/TW)e	 WL 	label	(for	US/CA/TW)f	 KCC	label	(for	Korea)
g	 Postel	label	(for	Indonesia)h	 D	side	label	(for	Indonesia)i	 BIS	label	(for	India)j	 WL/BT 	label	(for	Israel)k	 WL/BT	label	(for	Brazil)l	 WL	label	(for	South	 Africa)
For	 some	 models,	 you	also	 need	 to	apply	 one	or	two	 FCC	 labels.	 Check	the	
old	 base	 cover;	 if	it	has	 one	 or	two	 FCC	 labels,	 find	duplicates	 of	them	 in	the	
label	kit	and	apply	them	to	the	new	base	cover.	
For	the	location	of	each	label,	refer	to	the	following	figure:
Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475
a
c
deghijklf
bb
Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
deghijklf
a
cbb 
						

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Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475/Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
1020 Battery pack
For	access,	remove	this	FRU:
•	“1010	Base	cover ”	on	page	32
 DANGER
Only use the battery specified in the parts list for your computer. Any other battery 
could ignite or explode. 
Figure 2. Removal steps of battery pack
Flex 3-1470/Flex 3-1470 (HSW)/Flex 3-1435/Flex 3-1475
Disconnect	the	FPC	 connector	 in	the	 direction	 shown	by	arrows	
1	
and	
2.	
Unplug	 the	battery	 connector	 in	the	 direction	 shown	by	arrow	
3,	
then	 remove	
the	screws	 4.	Remove	the	battery	pack	
5.
54
4
32
1
Step
Screw (quantity) ColorTorque
4M2.0	×	4.0	mm,	Phillips	head,	nylok-coated	(2)	
Battery	to	UCASE	(Flex	3-1470/	
Flex	3-1470	(HSW)/Flex	3-1435/Flex	3-1475)	 Black
2.0	kgf*cm 
						

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Flex 3-1570 (HSW)/Flex 3-1535 Hardware Maintenance Manual
Figure 2. Removal steps of battery pack (continued)
Flex 3-1570/Flex 3-1570 (HSW)/Flex 3-1535
Unplug	the	battery	 connector	 in	the	 direction	 shown	by	arrow	
1,	
then	 remove	
the	screws	 2.	Remove	the	battery	pack	
3.
1
223
Step
Screw (quantity) ColorTorque
2M2.0	×	2.5	mm,	Phillips	head,	nylok-coated	(2)	
Battery	to	UCASE	(Flex	3-1570/	
Flex	3-1570	(HSW)/Flex	3-1535)	 Black
2.0	kgf*cm
When installing: 	Make	sure	that	the	connectors	are	attached	firmly.