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A first-person, immersive day in the life of an appliance repairman

Idle Appliance FixFollow
Appliance repair›Repair›UF20B· ProfessionalReport
Adaptive · 1080 / 720 / 480Auto subtitlesPlayback info 04:34
Welding Recipeno level stated on camera
ModelUF20BSpreadsheet tag; the video calls it the ‘Kill-You 3000’
MaterialThick nickel strip01:59
CellFloor washer’s original cells (18650 inferred)01:33
Cell count6 cellsComment says ‘6 cells’
Series6 SInferred
BMSOriginal pack boardSeen on camera
New cell internal resistance readings 10.17 / 11 / 80.56 (ASR, unit to be checked)01:41
Health kettle 890W, about 4A03:17
Cooker 3000W, rewired with 16A cable03:47
Charges: TV 150 / battery 290 / health kettle 10 / cooker 30 = 48004:30

Creator’s own settings as stated in the video (timestamps link to the moment). Not official values — test on scrap first.

Released 2025-05-29RepairLevel Professionaldigest confidence 0.65 · pending review

Bill of materials

Welder, accessories, consumables and parts used in this build; quantities and specs are editable Download BOM
AWithZ official
UF20B spot welder
×
¥569.9–599.9
WP120 Smart Pen (8 AWG)
×
¥39.9
Nickel-plated steel strip
×
from ¥5.9
Third-party partsFrom the creator’s parts list, grouped by category; links to third-party stores
Hisense TVOther parts · Sound repair
×
Third-party
Da Vinci testerOther parts · Fault finding
×
Third-party
Floor-washer battery packOther parts · 6 original cells · Cell replacement
×
Third-party
Battery tester (internal resistance meter)Meters · Check the new cells
×
Third-party
Anti-vibration foam / hot glueGlue / tape · Secure the pack
×
Third-party
16A power cableOther parts · 3000W cooker · Rewiring
×
Third-party

Description

A post-80s appliance repairman in the provincial capital earns ¥480 in a day: a Hisense TV with picture but no sound, two small components replaced, ¥150; a floor washer showing E10 and not charging, all 6 original cells replaced (new cells checked on an internal resistance meter, thick nickel strip spot-welded), ¥290; an 890W health kettle, ¥10; a restaurant electric cooker rewired with 16A cable, ¥30

A first-person record of one day (a live earnings counter sits top-left). Job one, a Hisense TV: clear picture but no sound even at volume 100; checked with a ‘Da Vinci tester’, two small components found open, desoldered and replaced, power on and the long-lost sound is back — perfect repair, ¥150; the creator also invites viewers’ LCD TV questions. Job two, a floor washer that won’t charge and shows fault code E10: pull the pack and measure, two cells badly aged, so all 6 original cells are replaced; each new cell is checked on a battery tester (internal resistance meter) (ASR readings of 10.17 / 11 and so on); the ‘Kill-You 3000’ spot welder welds thick nickel strip to try the weld quality — perfect; pack fitted, anti-vibration foam stuck on, hot glue heated and applied, fixed and OK, earnings jump to 440 (+290). Job three, a health kettle: the ‘tian’erte’ (thermostat / thermal fuse) replaced, 890 watts, 4 amps, that’s right, earnings 450. Job four, a restaurant electric cooker with a broken cord end: rewiring sounds simple but is a hassle, the plastic has hardened and is hard to open; cut off the end and fit a new cable, 16A cable for 3000 watts; a touch-up solder that isn’t solid gets redone; when done it looks original, ¥30. ¥480 for the day, knock off. 469 comments, heavily divided: ¥150 for two diodes is ‘brutal’, a used TV is only ¥120 so not worth repairing; the other side: ‘you’re paying for skill, if you think it’s expensive you’re a layman’ (liked by the creator); ¥290 for 6 cells plus labor is a bit high, over ¥200 profit; someone built their own ‘Kill-You 3000’ and asks for pointers.

Outcome

GoalRecord an appliance repairman’s four jobs in one day
BuildHisense TV, floor-washer battery pack (6 cells), health kettle, restaurant cooker power cord
ResultAll four jobs repaired, ¥480 earned for the day · verified on camera: TV has sound at 47–60s; floor washer fixed at 175–181s; cooker rewired at 260–266s; day’s earnings ¥480 at 270s

Steps7 steps · click a frame to jump

  1. 1. Hisense TV with picture but no sound, fault-finding with the Da Vinci tester

    How much does a post-80s appliance repairman in the provincial capital earn in a day; a Hisense TV with a clear picture but no sound at volume 100; the Da Vinci tester finds where the fault is.

    00:00 – 00:23
  2. 2. Two small components open, desolder and replace, sound is back, ¥150

    Test for a response; fault found — two parts open; desolder them and fit new ones; power on and the long-lost sound is back, perfect repair, reassembled; earnings 150.

    00:30 – 01:06
  3. 3. Floor washer E10 not charging, two cells aged so all replaced with originals, new cells checked on the meter

    Inviting TV questions; the floor washer won’t charge and shows E10; pull the pack and measure, two cells badly aged so replace them all; original cells; the battery tester checks each new cell’s internal resistance.

    01:07 – 01:40
  4. 4. The ‘Kill-You 3000’ welds thick nickel strip, pack fitted, foam and hot glue

    Weld thick nickel strip to try the weld quality — perfect; pack fitted; anti-vibration foam stuck on, hot glue heated and applied; fixed and OK, earnings +290 → 440.

    01:59 – 02:56
  5. 5. Health kettle: thermostat replaced, 890W 4A, earnings 450

    A health kettle; the ‘tian’erte’ replaced, that’s right; 890 watts, 4 amps of current; earnings 450.

    03:01 – 03:30
  6. 6. Restaurant cooker rewired with 16A cable, 3000W

    The cord end is broken; rewiring sounds simple but is a hassle, the plastic has hardened over time and is hard to open; cut off the end and fit a new cable, 16A cable for 3000 watts; a touch-up solder that isn’t solid gets redone; done, it looks original.

    03:31 – 04:26
  7. 7. ¥30 collected, ¥480 for the day, knock off

    How much? 30; ¥480 for the day, knock off.

    04:28 – 04:34

Bill of materials

Hisense TV ×1Sound repair
Da Vinci tester ×1Fault finding
Floor-washer battery pack ×16 original cells · Cell replacement
Battery tester (internal resistance meter) ×1Check the new cells
Spot welder ‘Kill-You 3000’ (UF20B) ×1Weld thick nickel strip
Anti-vibration foam / hot glueSecure the pack
16A power cable ×13000W cooker · Rewiring

Measured on camera

Health kettle power / current890W / 4A 03:17
Day’s earnings¥480 04:30

Creator’s tips

  • Test an aged pack cell by cell; if two are bad, replace the whole set with original cells 01:22
  • Check every new cell on an internal resistance meter before fitting 01:33
  • Use 16A cable when rewiring a 3000W appliance 03:47
  • Stick on anti-vibration foam and hot-glue the pack when putting it back 02:36

Pitfalls

  • Old appliance plastic hardens and is hard to open; rewiring is more hassle than it looks 03:31
  • A touch-up solder that isn’t solid has to be redone 04:07

Li-ion safety

  • Size the cable by power when rewiring a high-power cooker (3000W → 16A) 03:47
DIY lithium packs can catch fire: check cells for shorts before welding, always add a BMS, never skip insulation and fusing on high-current builds.

Quotes

“The long-lost sound is back — perfect repair” 00:47
“Rewiring sounds simple, but it’s a real hassle to do” 03:31
“¥480 for the day, knocking off” 04:30

Cost & time

TV sound repair¥150
Floor washer: 6 cells replaced¥290
Health kettle¥10
Cooker cord replacement¥30
Total¥480
TimeFour jobs in one day

Comments 469· 10 real comments collected

Comment insightsanswered 0 · open 2 · corrections 2

Open questions

I built the 'Slay-you 3000', please give me pointers 5
When a small appliance breaks do you still get it repaired or just buy new 3

Corrections from viewers

Two diodes for ¥150 is savage; a used TV is ¥120, not worth repairing (several people) 19Doubtful
6 cells plus labor at 290 is a bit steep, that's 200-plus clear profit 4Doubtful
Repair pricing disputeUsed TV vs repair6 cells for 290'Slay-you 3000'Future of the trade
苏
苏27s1 yr ago · Hebei

At these prices I bet lots of people walk away, a used TV online is 120 now, most probably won't bother repairing

很
很大的哦1 yr ago · Guangdong

Savage, ¥150 to swap two diodes

9
972131 yr ago · Sichuan

Anyone calling it expensive is a total layman, you're paying for skill here, could you fix it yourself? (liked by the creator)

草
草木有本心1 yr ago · Guangdong

That first TV, ¥150 buys a perfectly good used one. Not worth repairing at all

1
1688LJ1 yr ago · Guangdong

No future in appliance repair

欣
欣然1 yr ago · Guangdong

Da Vinci, I built the 'Slay-you 3000', Master Zhang please give me some pointers.

伱
伱不配知道1 yr ago · Jiangsu

6 cells plus labor for 290 is a bit steep

食
食尚冷饮批发1 yr ago · Jiangsu

I used to do appliance repair too, but once small appliances started going for ¥9.9 with free shipping I switched trades. Question for everyone: when a small appliance at home breaks, do you still take it in for repair, or toss it and buy new

卡
卡了吧唧1 yr ago · Inner Mongolia

Of course skill costs more than materials, otherwise go buy the gear and fix it yourself (liked by the creator)

用
用户66681251276291 yr ago · Anhui

6 cells, minus cost, 200-plus clear profit, awesome!

苏
苏27s1 yr ago · Hebei

At these prices I bet lots of people walk away, a used TV online is 120 now, most probably won't bother repairing

很
很大的哦1 yr ago · Guangdong

Savage, ¥150 to swap two diodes

9
972131 yr ago · Sichuan

Anyone calling it expensive is a total layman, you're paying for skill here, could you fix it yourself? (liked by the creator)

草
草木有本心1 yr ago · Guangdong

That first TV, ¥150 buys a perfectly good used one. Not worth repairing at all

1
1688LJ1 yr ago · Guangdong

No future in appliance repair

欣
欣然1 yr ago · Guangdong

Da Vinci, I built the 'Slay-you 3000', Master Zhang please give me some pointers.

伱
伱不配知道1 yr ago · Jiangsu

6 cells plus labor for 290 is a bit steep

食
食尚冷饮批发1 yr ago · Jiangsu

I used to do appliance repair too, but once small appliances started going for ¥9.9 with free shipping I switched trades. Question for everyone: when a small appliance at home breaks, do you still take it in for repair, or toss it and buy new

卡
卡了吧唧1 yr ago · Inner Mongolia

Of course skill costs more than materials, otherwise go buy the gear and fix it yourself (liked by the creator)

用
用户66681251276291 yr ago · Anhui

6 cells, minus cost, 200-plus clear profit, awesome!

苏
苏27s1 yr ago · Hebei

At these prices I bet lots of people walk away, a used TV online is 120 now, most probably won't bother repairing

很
很大的哦1 yr ago · Guangdong

Savage, ¥150 to swap two diodes

9
972131 yr ago · Sichuan

Anyone calling it expensive is a total layman, you're paying for skill here, could you fix it yourself? (liked by the creator)

草
草木有本心1 yr ago · Guangdong

That first TV, ¥150 buys a perfectly good used one. Not worth repairing at all

1
1688LJ1 yr ago · Guangdong

No future in appliance repair

欣
欣然1 yr ago · Guangdong

Da Vinci, I built the 'Slay-you 3000', Master Zhang please give me some pointers.

伱
伱不配知道1 yr ago · Jiangsu

6 cells plus labor for 290 is a bit steep

食
食尚冷饮批发1 yr ago · Jiangsu

I used to do appliance repair too, but once small appliances started going for ¥9.9 with free shipping I switched trades. Question for everyone: when a small appliance at home breaks, do you still take it in for repair, or toss it and buy new

卡
卡了吧唧1 yr ago · Inner Mongolia

Of course skill costs more than materials, otherwise go buy the gear and fix it yourself (liked by the creator)

用
用户66681251276291 yr ago · Anhui

6 cells, minus cost, 200-plus clear profit, awesome!

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